mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Deep insights into the advancements and applications of perovskite based photovoltaic cells

The organometal halide perovskite materials have a blend of surprising optoelectronic properties,for example high value of absorption coefficient and abrupt optical retention edge,lifetime,long charge carrier diffusion length and many more.Brought in conjunction with the capacity for manufacturing at low temperature,likewise from the solution,devices based on perovskite,particularly solar cells have been contemplated seriously with striking advancements in performance,in the course of recent years.The amalgamation of minimal effort,high efficiency and extra applications gives incredible potential to commercialization of these cells.The applications and performance of perovskite cells frequently relate with the structures of the device.Numerous creative structures of the devices were produced,targeting for vast scale manufacture,diminishing creation cost,upgrading the PCE and subsequently expanding the prospective for future applications.This paper outlines the various advanced structures of PSC,challenges confronted by these PSCs and their future perspectives.The commercial applications of PSC are additionally talked about in this paper.
Ionic liquid-assisted hydrothermal synthesis of SnS nanoparticles:Electrode materials for lithium batteries,photoluminescence and photocatalytic activities

Tin mono-sulphide (SnS) nanoparticles (Nps) have been successfully synthesised through ionic liquid assisted hydrothermal method using hydrated tin (Ⅱ) chloride as a precursor,thiourea as sulphur source precursors using 2-Methoxy ethyl methyl imidazolium methane sulfonate ionic liquid as co-solvent.The Reitveld refinement on powder X-ray diffraction (PXRD) confirmed the presence of orthorhombic SnS structure as major phase along with traces amount of SnS2 and Sn2S3.Diffuse reflectance spectrum studies revealed the energy band gap around 1.38 eV.TEM images confirmed the SnS Nps with average particle size of 40 nm and HRTEM suggest good crystallinity.The electrochemical property for lithium storage behaviour shows an initial discharge capacity of 658 mAh/g and it retains discharge capacity of 426 mAh/g for 16 cycles,at current density 100 mA/g.The obtained results indicate that SnS Nps to be one of the possible promising anode materials for next generation Lithium batteries.Photoluminescence study of SnS Nps shows a strong green emission at 530 nm.SnS Nps were also tested for the photocatalytic adsorption of methylene blue and Rhodamine B.
Modified silicon carbide whisker reinforced polybenzimidazole used for high temperature proton exchange membrane

Polybenzimidazole containing ether bond (OPBI) was reinforced with silicon carbide whisker (mSiC) modified by 3-aminopropyltriethoxysilane (KH550),and then doped with phosphoric acid (PA) to obtain OPBI/mSiC/PA membranes.These OPBI/mSiC/PA membranes have excellent mechanical strength and oxidative stability and can be used for high temperature proton exchange membrane (HT-PEM).The tensile strength of OPBI/mSiC/PA membranes ranges from 27.3 to 36.8 MPa,and it increases at first and then decreases with the increase of mSiC content.The high mSiC content and PA doping level contribute to improving the proton conductivity of membranes.The proton conductivity of PBI/mSiC-10/PA membrane is 27.1 mS cm~(-1) at 170℃ without humidity,with an increase of 55.7% compared with that of OPBI/PA membrane.These excellent properties make OPBI/mSiC/PA membranes promising membrane materials for HT-PEM applications.
Review on transition metal compounds based counter electrode for dye-sensitized solar cells

Commercial application of the dye-sensitized solar cells (DSCs) depends on great improvement of the power conversion efficiency and reduction of the fabrication cost.Generally,developing low cost counter electrode catalysts to replace the expensive Pt counter electrode is a feasible path to reduce the production cost of DSCs.In this review article,we summarize the recent progress on the transition metal compound based counter electrode catalysts containing carbides,nitrides,oxides,sulfides,phosphide,selenides,borides,silicide,and telluride toward the regeneration of the traditional iodide redox couple.Moreover,the benefits and drawbacks of each kind of CE catalyst are discussed and the research directions to design new counter electrode catalysts in future research are also proposed.
Three dimensional photovoltaic fibers for wearable energy harvesting and conversion

As the development of smart electronics,self-powered sources have been attracting increasing attention.This review summarizes research progress of photovoltaic fibers and their integrated power sources with multi-stage energy conversion.Recent development of three dimensional photovoltaic fibers is glanced with special attention to structure design and materials of typical photovoltaic types (inorganic,organic,dye/quantum dot sensitized and perovskite solar cells).The application of carbon materials in fiber energy is focused as it is a hot topic recently.The hybrid energy systems based on fiber solar cells and fiber supercapacitors,fiber batteries and fiber nanogenerators are summarized together with hybrid energy textiles.This review provides a macroscopic view of novel energy fibers and will attract research interest in flexible/wearable fiber electronics and energy textiles.
Enhanced gas separation performance of mixed matrix hollow fiber membranes containing post-functionalized S-MIL-53

Mixed matrix hollow fiber membranes (MMHFMs) filled with metal-organic frameworks (MOFs) have great potential for energy-efficient gas separation processes,but the major hurdle is polymer/MOFs interfacial defects and membrane plasticization.Herein,lab-synthesized MIL-53 was post-functionalized by aminosilane grafting and subsequently incorporated into Ultem(r)1000 polymer matrix to fabricate high performance MMHFMs.SEM,DLS,XRD and TGA were performed to characterize silane-modified MIL-53 (S-MIL-53) and prepared MMHFMs.Moreover,the effect of MOFs loading was systematically investigated first;then gas separation performance of MMHFMs for pure and mixed gas was evaluated under different pressures.MMHFMs containing post-functionalized S-MIL-53 achieved remarkable gas permeation properties which was better than model predictions.Compared to pure HFMs,CO_2 permeance of MMHFM loaded with 15% S-MIL-53 increased by 157% accompanying with 40% increase for CO_2/N_2 selectivity,which outperformed the MMHFM filled with naked MIL-53.The pure and mixed gas permeation measurements with elevated feed pressure indicated that incorporation of S-MIL-53 also increased the resistance against CO_2 plasticization.This work reveals that post-modified MOFs embedded in MMHFMs facilitate the improvement of gas separation performance and suppression of membrane plasticization.
Interfacial charge-transfer engineering by ionic liquid for high performance planar CH_3NH_3PbBr_3 solar cells

The energy barrier at the CH_3NH_3PbBr_3/TiO_2 interface hinders the electron transfer from CH_3NH_3PbBr_3 to compact TiO_2 (cp-TiO_2).Ionic liquid (IL),that forms dipoles pointing away from TiO_2,can adjust the work function of TiO_2 resulting in suitable energy level for charge transfer from CH_3NH_3PbBr_3 to TiO_2.The time-resolved photoluminescence spectroscopy (TRPL) measurements confirm faster electron transfer from the CH_3NH_3PbBr_3 film to TiO_2 after modification by IL.Solar cells based on IL modified cp-TiO_2 demonstrate efficiency of ~6%,much higher than the devices (0.2%) fabricated using untreated cp-TiO_2as the electron transport layer.
Bendable tube-shaped supercapacitor based on reduced graphene oxide and Prussian blue coated carbon fiber yarns for energy storage

Carbon fiber yarns (CFY) are promising as a new type of flexible building blocks for the construction of flexible architectures for the energy storage applications.The main hurdle with CFY is how to make them high energy and power capable by using economically and environmentally viable materials.Here,we report reduced graphene oxide (rGO) and Prussian blue (PB) coated CFY,derived from a facile electrochemical process at room temperature for supercapacitor electrodes.The PB coated CFY and rGO coated CFY electrodes exhibit the excellent gravimetric capacitance of 339 F/g and 160.2 F/g,respectively,in aqueous KCl electrolyte in three-electrode cell configuration.When we coupled these electrodes inside the flexible plastic tube and separated by the electrolyte wet filter paper in order to construct flexible architecture,the resulting device delivers excellent specific energy of 52.1 Wh/kg and 26.5 Wh/kg with offering specific power of 3100 W/kg and 14400 W/kg respectively,under a wide operating potential of 1.8 V with excellent rate capability.The device shows high tolerance towards bending,and retained its efficiency to the capacitance after being bent at an angle of 360° for 200 bending cycles.
Development of antimony sulfide-selenide Sb_2(S,Se)_3-based solar cells

Antimony sulfide-selenide Sb_2(S,Se)_3,including Sb_2S_3 and Sb_2Se_3,can be regarded as binary metal chalcogenides semiconductors since Sb_2S_3 and Sb_2Se_3 are isomorphous.They possess abundant elemental storage,nontoxicity,good stability with regard to moisture at elevated temperatures and suitable physical parameters for light absorption materials in solar cells.To date,quite a few attempts have been conducted in the materials synthesis,photovoltaic property investigation and device fabrication.Benefiting from previous investigation in thin film solar cells and new generation nanostructured solar cells,this class of materials has been applied in either sensitized-architecture or planar heterojunction solar cells.Decent power conversion efficiencies from 5% to 7.5% have been achieved.Apparently,further improvement on the efficiency is required for future practical applications.To give an overview of this research field,this paper displays some typical researches regarding the methodologies toward the antimony sulfide-selenide synthesis,development of interfacial materials and device fabrications,during which we highlight some critical findings that promote the efficiency enhancement.Finally,this paper proposes some outstanding issue regarding fundamental understanding of the materials,some viewpoints for the efficiency improvement and their future challenges in solar cell applications.
ZnSe quantum dots downshifting layer for perovskite solar cells

To date,the instability of organometal halide perovskite solar cells (PSCs) has become the focus issue that limits the development and long-term application of PSCs.Both the ultraviolet (UV) rays in sunlight and moisture in air can significantly accelerate the disintegration of the perovskite.Here,we introduced a ZnSe quantum dots layer as downshifting materials,which was spin-coated onto the backside of PSCs.This layer converted the UV rays into visible light to prevent the destruction of PSCs as well as increase the light harvesting of the perovskite layer.Under the UV irradiation in the moisture ambient (40%),the destruction speed of the unencapsulated perovskite films were also delayed evidently.In addition,the power conversion efficiency (PCE) of the PSCs was increased from 16.6% to 17.3% due to the increase of the visible light absorbance of the perovskite.
Synthesis and electrochemical performance of micro-nano structured LiFe_(1-x)Mn_xPO_4/C (0 ≤ x ≤ 0.05) cathode for lithium-ion batteries

Micro-nano structured LiFe_(1-x)Mn_xPO_4/C (0 ≤ x ≤ 0.05) cathodes were prepared by spray drying,followed by calcination at 700℃.The spherical LiFe_(1-x)Mn_xPO_4/C (0 ≤ x ≤ 0.05) particles with the size of 0.5 to 5.0 μm are composed of lots of nanoparticles of 20 to 30 nm,and have the well-developed interconnected pore structure.In contrast,when Mn doping content is 3 mol% (x=0.03),the LiFe_(0.97)Mn_(0.03)PO_4/C demonstrates maximum specific surface area of 31.30 m~2/g,more uniform pore size and relatively better electrochemical performance.The initial discharge capacities are 161.59,157.04 and 153.13 mAh/g at a discharge rate of 0.2,0.5 and 1 C,respectively.Meanwhile,the discharge capacity retentions are ~100% after 120 cycles.The improved electrochemical performance should be attributed to higher specific surface,smaller polarization voltage,and a high Li~+ diffusion rate due to the micro-nano porous structure and lattice expansion produced by Mn doping.
A polypyrrole-coated acetylene black/sulfur composite cathode material for lithium-sulfur batteries

Lithium-sulfur batteries are promising next-generation energy storage devices beyond conventional lithium ion batteries.However,it suffers from rapid capacity fading and poor cyclic stability.Here we report a facile in situ sulfur deposition and chemical oxidative polymerization method for preparing acetylene black/sulfur@polypyrrole (AB/S@PPy) composite as a cathode material for lithium-sulfur batteries.It is demonstrated that PPy is covered uniformly onto the surface of the AB/S composite forming a core-shell structure.In the structure,AB in the matrix and PPy on the surface acts as a combined conductive framework to provide ions and electrons transport pathways,and to inhibit the dissolution or diffusion of polysulfide into the electrolyte.The as-designed AB/S@PPy composite exhibits excellent rate capability and cyclic stability.The initial discharge specific capacity is as high as 1179.4 mAh/g,and remains at 769.3 mAh/g after 80 cycles at 0.2 C.Even at a high rate (0.5 C),a maximum discharge capacity of 811.1 mAh/g is still achieved for the AB/S@PPy composite after activation,and the capacity retention is over 62.5% after 200 cycles.
Ultrathin nanosheets of cobalt-nickel hydroxides hetero-structure via electrodeposition and precursor adjustment with excellent performance for supercapacitor

A homogeneous better-dispersed ultrathin nanosheets (ca.5 nm) of cobalt-nickel layered double hydroxides (LDH) supported on nickel foam scaffold was synthesized using controllable electrodeposition approach for high efficiency electrode materials of new supercapacitor.The morphology and electrochemical performances of the samples can be controlled by adjusting the precursor ratio,i.e.,Ni(OAc)_2/Co(NO_3)_2 molar ratio in the electrodeposition approach.With the increase of this molar ratio,the electrochemical performances give a volcano trend.When the optimized molar ratio is 0.64/0.36,the hybrid delivered a high specific capacitance of 1587.5 F g~(-1) at a current density of 0.5 A g~(-1),with good rate capability (1155 F g~(-1) was retained even at 10 A g~(-1)) and a robust recycle stability (remaining 91.5% after 1000 cycles at 5 A g~(-1)).The good performance could be attributed to the enlarged interlayer spacing,ultrathin nanosheets and synergistic effects between Co(OH)2 and Ni(OH)_2.Furthermore,an asymmetric supercapacitor with a high energy density of 34.5 Wh kg~(-1) at 425 W kg~(-1) and excellent cycling stability of 85.4% after 5000 charge-discharge cycles at 2 A g~(-1) was fabricated.We believe that this fantabulous new electrode material would have encouraging applications in electrochemical energy storage and a wide readership.
Hierarchical graphite foil/CoNi_2S_4 flexible electrode with superior thermal conductivity for high-performance supercapacitors

Effective heat dissipation is a crucial issue in electrochemical energy storage devices.Thus,it is highly desirable to develop high-performance electrode materials with high thermal conductivity.Here,we report a facile one-step electrodeposition method to synthesize ternary cobalt nickel sulfide (CoNi_2S_4) flower-like nanosheets which are grown on graphite foil (GF) as binder-free electrode materials for supercapacitors.The as-fabricated GF/CoNi_2S_4 integrated electrode manifested an excellent thermal conductivity of 620.1 W·m~(-1)·K~(-1) and a high specific capacitance of 881 F·g~(-2) at 5 mA cm~(-2),as well as good rate capability and cycling stability.Ultimately,the all-solid-state symmetric supercapacitor based on these advanced electrodes demonstrated superior heat dissipation performance during the galvanostatic charge-discharge processes.This novel strategy provides a new example of effective thermal management for potential applications in energy storage devices.
Three dimensional nano-LiMn_(0.6)Fe_(0.4)PO_4@C/CNT as cathode materials for high-rate lithium-ion batteries

Three dimensional (3D) nano-LiMn_(0.6)Fe_(0.4)PO_4@C/CNT composite was successfully synthesized by an oleylamine-assisted solvothermal method.The prepared composite showed excellent electrochemical performance,especially superior high rate capability.It could deliver a specific discharge capacity of 103.1 mAh/g,even at 80 C.The superior high rate performance of the as-prepared LiMn_(0.6)Fe_(0.4)PO_4@C/CNT electrode is attributed to its unique 3D conducting network:(1) the prepared LiMn_(0.6)Fe_(0.4)PO_4@C active particles were in nano-scale with a size of 30-50 nm;(2) LiMn_(0.6)Fe_(0.4)PO_4 nanoparticles were uniformly coated by amorphous carbon with a thickness of 3 nm;(3) the graphitized conductive CNTs were dispersed homogenously among the LiMn_(0.6)Fe_(0.4)PO_4@C active particles.The synergistic effect of the nanoscale amorphous carbon coated LiMn_(0.6)Fe_(0.4)PO_4@C active particles and the graphitized CNTs reduces the diffusion path of the lithium ions and benefits the transference ability of electron.
Surface-engineering of layered LiNi_(0.815)Co_(0.15)Al_(0.035)O_2 cathode material for high-energy and stable Li-ion batteries

Surface engineering is an effective strategy to restrain the generation of rocksalt NiO phase on surface of layered LiNi_(0.815)Co_(0.15)Al_(0.035)O_2 (NCA) primary nanoparticles,a representative Ni-rich layered oxides cathode materials.Herein,we demonstrate the kilogram-scale synthesis of few-layer reduced graphene oxide (rGO) conformably coated NCA primary nanoparticles cathode materials by a mechanical wet ball-milling strategy.The lightening rGO coating layer effectively avoids the direct contact of electrolyte and NCA with rapid electrons transfer.As a result,the as-obtained NCA@rGO hybrids with only 1.0 wt% rGO content can deliver a high specific capacity (196 mAh g~(-1) at 0.2 C) and fast charge/discharge capability (127 mAh g~(-1) at 5 C),which is much higher than the corresponding NCA nanoparticles (95 mAh g~(-1) at 5 C).Even after 100 cycles at 1 C,91.7% of initial reversible capacity is still maintained.Furthermore,a prismatic pouch cell (240 mAh) is also successfully assembled with the commercial graphite anode.
Architecture of Co-layered double hydroxide nanocages/graphene composite electrode with high electrochemical performance for supercapacitor

A facile hydrolysis method was applied to fabricate high-performance Co-layered double hydroxide (LDH) nanocages/graphene composites for supercapacitors.The materials exhibit enhanced rate capability than the counterpart electrode free of graphene while maintaining a high specific capacitance.In addition,such Co-LDH nanocages/graphene composites display an excellent cycling stability;the capacitance retention of Co-LDH nanocages/graphene composite electrode remains 90.4% after 10000 cycles at a current density of 2 A g~(-1).The integration of high capacity of double hydroxide and outstanding conductivity of graphene makes the delicately-designed composites promising candidates for electrode materials for supercapacitors.
Spherical FeF_3·0.33H_2O/MWCNTs nanocomposite with mesoporous structure as cathode material of sodium ion battery

FeF_3·0.33H_2O crystallizes in hexagonal tungsten bronze structure with more opened hexagonal cavities are considered as next generation electrode materials of both lithium ion battery and sodium ion battery.In this paper the mesoporous spherical FeF_3·0.33H_2O/MWCNTs nanocomposite was successfully synthesized via a one-step solvothermal approach.Galvanostatic measurement showed that the performances of sodium ion batteries (SIBs) using FeF_3·0.33H_2O/MWCNTs as cathode material were highly dependent on the morphology and size of the as-prepared materials.Benefitting from the special mesoporous structure features,FeF_3·0.33H_2O/MWCNTs nanocomposite exhibits much better electrochemical performances in terms of initial discharge capacity (350.4 mAh g~(-1)) and cycle performance (123.5 mAh g~(-1) after 50 cycles at 0.1 C range from 1.0 V to 4.0 V) as well as rate capacity (123.8 mAh g~(-1) after 25 cycles back to 0.1 C).The excellent electrochemical performance enhancement can be attributed to the synergistic effect of the mesoporous structure and the MWCNTs conductive network,which can effectively increase the contact area between the active materials and the electrolyte,shorten the Na+ diffusion pathway,buffer the volume change during cycling/discharge process and improve the structure stability of the FeF_3·0.33H_2O/MWCNTs nanocomposite.
Recent progresses in the suppression method based on the growth mechanism of lithium dendrite

Lithium secondary batteries (LSBs) with high energy densities need to be further developed for future applications in portable electronic devices,electric vehicles,hybrid electric vehicles and smart grids.Lithium metal is the most promising electrode for next-generation rechargeable batteries.However,the formation of lithium dendrite on the anode surface leads to serious safety concerns and low coulombic efficiency.Recently,researchers have made great efforts and significant progresses to solve these problems.Here we review the growth mechanism and suppression method of lithium dendrite for LSBs' anode protection.We also establish the relationship between the growth mechanism and suppression method.The research direction for building better LSBs is given by comparing the advantages and disadvantages of these methods based on the growth mechanism.
Reliability of Parallel Stress-Strength Model

In this paper, the reliability of a parallel stress-strength model of exponentiated Pareto distribution is discussed. Different point estimations and interval estimations are proposed. The point estimators obtained are maximum likelihood and Bayesian estimators. The interval estimations obtained are approximate, exact, bootstrap-p and bootstrap-t confidence intervals and Bayesian credible interval. Different methods and the corresponding confidence intervals are demonstrated using some simulation studies.
Significantly enhanced oxygen reduction activity of Cu/CuN_xC_y co-decorated ketjenblack catalyst for Al-air batteries

Highly efficient and non-precious catalysts are imperative for oxygen reduction reaction (ORR) to replace Pt/C.Anchoring efficient active species to carbon supports is a promising and scalable strategy.Here we synthesize Cu nanoparticles and noncrystalline CuN_xC_y species co-decorated ketjenblack (KB) carbon catalyst (denoted as Cu-N-KB-acid) by a facile and scalable method using copper sulfate,melamine,and KB as raw materials.An initial one-pot hydrothermal treatment is designed before pyrolysis process to achieve the good distribution of Cu and melamine on KB via a possible chelation effect.Owing to the synergistic effect of Cu and CuN_xC_y on KB,this composite catalyst displays excellent ORR catalytic activity in alkaline solution,which is comparable to the commercial 20% Pt/C.When used as a catalyst in a home-made Al-air battery,it shows a stable discharge voltage of 1.47 V at a discharge density of 50 mA cm~(-2),a little higher than that of Pt/C (1.45 V).