Query: Sulfide solid electrolyte Si

title: Electrolyte Optimization for Enhancing Electrochemical Performance of Antimony Sulfide/Graphene Anodes for Sodium Ion Batteries Carbonate Based and Ionic Liquid Electrolytes
abstract: The electrolyte is a key component in determining the performance of sodium ion batteries. A systematic study is conducted to optimize the electrolyte formulation for a Sb2S3/graphene anode, which is synthesized via a facile solvothermal method. The effects of solvent composition and fluoroethylene carbonate (FEC) additive on the electrochemical properties of the anode are examined. The propylene carbonate (PC) based electrolyte with FEC can ensure the formation of a reliable solid electrolyte interphase layer, resulting in superior charge discharge performance, compared to that found in the ethylene carbonate (EC)/diethyl carbonate (DEC) based electrolyte. At 60 degC, the carbonate based electrolyte cannot function properly. At such an elevated temperature, however, the use of an N propyl N methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid electrolyte is highly promising, enabling the Sb2S3/graphene electrode to deliver a high reversible capacity of 760 mAh g 1 and retain 95% of its initial perform.

title: All Solid State Lithium Sulfur Battery Using a Glass Type P2S5 Li2S Electrolyte: Benefits on Anode Kinetics
abstract: Lithium sulfur (Li S) batteries are promising candidates for next generation electrical energy storage devices due to their high specific energy. Despite intense research, there are still a number of technical challenges in developing a high performance Li S battery. To elucidate the issues, an all solid state Li S battery was fabricated using Li3PS4 solid electrolyte. Most of the theoretical capacity of sulfur, 1600 mAhg 1 was attained in the initial discharge charge cycles with a high coulombic efficiency approaching 99% To verify the benefit of the solid state electrolyte, galvanostatic stripping deposition tests were also carried out on a symmetrical Li/Li cell and compared with those of a liquid electrolyte (1 M lithium bis(trifluoromethane sulfonyl) imide (LiTFSI) in a mixture of 1,3 dioxolane (DOL) diethoxyethane (DEE) The kinetics and thermodynamics of the solid state cell are discussed from the viewpoint of the charge transfer processes. This study demonstrates both the merits and drawbacks of using the solid sulfide electrolyte in a Li S battery and facilitates the further improvement of this important high energy storage device.

title: The Electrochemical Characteristics and Applicability of an Amorphous Sulfide Based Solid Ion Conductor for the Next Generation Solid State Lithium Secondary Batteries
abstract: Sulfide based solid electrolytes are of considerable practical interest for all solid state batteries due to their high ionic conductivity and softness at room temperature. In particular, iodine containing lithium thiophosphate is known to exhibit high ionic conductivity but its applicability in solid state battery remains to be examined. To demonstrate the possibility of the iodine doped solid electrolyte (SE) LiI Li3PS4 was used to construct two different types of test cells were prepared, Li/SE/S and Li/SE/LiNi0.80Co0.15Al0.05 cells. The solid electrolyte, LiI Li3PS4 showed a high ionic conductivity approximately 1.2 mScm 1 at 25 Within 100 cycles, the capacity retention was better in Li/SE/S cell, and the red ox shuttle was not observed due to physical blockage of SE layer. The capacity fade was approximately 4% from the maximum capacity observed at 10th cycle, after 100 cycles in Li/SE/S cell. On the contrary, the capacity fade was much larger in Li/SE/LiNi0.80Co0.15Al0.05 cell, probably due to the decomposition of the electrolyte at the operating potential range. Nevertheless, both the Li/SE/LiNi0.80Co0.15Al0.05 and Li/SE/S cells exhibited the high coulombic efficiencies above 99.6% and 99.9% during charge discharge cycle test, respectively. This fact indicates that a high energy density can be possible without an excess lithium metal anode. In addition, it was particularly interesting that the SE showed a reversible capacity about 260 mAhg 1 SE. This electrolyte may have not only as a role of the ion conduction, but also as a catholite.

title: Layered ternary sulfide CuSbS2 nanoplates for flexible solid state supercapacitors
abstract: Layer structured materials are advantageous for supercapacitor applications owing to their ability to host a variety of atoms or ions, large ionic conductivity and high surface area. In particular, ternary or higher order layered materials provide a unique opportunity to develop stable supercapacitor devices with high specific capacitance values by offering additional redox sites combined with the flexibility of tuning the interlayer distance by substitution. CuSbS2 is a ternary layered sulfide material that is composed of sustainable and less toxic elements. We report the results of a systematic study of CuSbS2 nanoplates of varying thickness (4.3 1.4 to 105 5.5 nm) for use as supercapacitors along with the effect of ionic size of electrolyte ions on the specific capacitance and long term cycling performance behavior. We have obtained specific capacitance values as high as 120 F g 1 for nanoplates with thickness of 55 6.5 nm using LiOH electrolyte. Electronic structure calculations based on density functional theory predict that with complete surface coverage by electrolyte ions a specific capacitance of over 1160 F g 1 is achievable using CuSbS2, making it a very attractive layer structured material for supercapacitor applications. Additionally, the calculations indicate that lithium ions can be intercalated between the van der Waals layers without significantly distorting the CuSbS2 structure, thereby further enhancing the specific capacitance by 85 F g 1. Quasi solid state flexible supercapacitor devices fabricated using CuSbS2 nanoplates exhibit an aerial capacitance value of 40 mF cm 2 with excellent cyclic stability and no loss of specific capacitance at various bending angles. Moreover, the supercapacitors are operable over a wide temperature range. We have further compared the electrochemical behavior of CuSbS2 with other non layered phases in the system, namely Cu3SbS3, Cu3SbS4 and Cu12Sb4S13 that clearly highlight the importance of the layered structure for enhancing charge storage.

title: High energy long cycling all solid state lithium metal batteries enabled by silver carbon composite anodes
abstract: An all solid state battery with a lithium metal anode is a strong candidate for surpassing conventional lithium ion battery capabilities. However, undesirable Li dendrite growth and low Coulombic efficiency impede their practical application. Here we report that a high performance all solid state lithium metal battery with a sulfide electrolyte is enabled by a Ag C composite anode with no excess Li. We show that the thin Ag C layer can effectively regulate Li deposition, which leads to a genuinely long electrochemical cyclability. In our full cell demonstrations, we employed a high Ni layered oxide cathode with a high specific capacity >210 mAh g 1 and high areal capacity >6.8 mAh cm 2 and an argyrodite type sulfide electrolyte. A warm isostatic pressing technique was also introduced to improve the contact between the electrode and the electrolyte. A prototype pouch cell (0.6 Ah) thus prepared exhibited a high energy density >900 Wh l 1 stable Coulombic efficiency over 99.8% and long cycle life (1,000 times) Solid state Li metal batteries represent one of the most promising rechargeable battery technologies. Here the authors report an exceptional high performance prototype solid state pouch cell made of a sulfide electrolyte, a high Ni layered oxide cathode and, in particular, a silver carbon composite anode with no excess Li.

title: Polyphenylene Sulfide Sulphonic Acid: Processing, Solid State Conductivity and Electrolyte Transport Properties
abstract: Polyphenylene sulfide sulphonic acid is an amorphous, non melting solid which dissolves only in SOCl2, dehydrates at 40 180degC and degrades with heavy weight loss starting from 270degC. The polymer has been tested as solid state component of electrochemical devices in the 20 160degC range with the following results: conductivity (ohm 1 cm 1) 10 1 in 30% KOH aq. 10 2 in 5 atm steam pressure and 10 5 in air; transport number in KCl (t 1. Possible applications are discussed in relation to the performance of other established material.

title: Understanding the Li ion storage mechanism in a carbon composited zinc sulfide electrode
abstract: Sulfide compounds are interesting conversion electrode materials for Li ion batteries, due to their high theoretical capacity. However, they suffer from large volumetric changes and fast capacity fading. To overcome these issues, nanosized zinc sulfide (ZnS) modified with polyelectrolytes and graphene (ZnS C/G) has been synthesized and investigated as an enhanced conversion alloying anode material. In situ synchrotron X ray diffraction and X ray absorption spectroscopy are used to elucidate the Li storage process during the 1st cycle. In addition, the evolution of internal resistance and the corresponding solid electrolyte interphase (SEI) formation during the 1st cycle are discussed based on electrochemical impedance spectroscopy and X ray photoelectron spectroscopy. The results reveal that the formation of lithiated products and the SEI layer at different voltages can influence Li+ diffusion into the electrode. Moreover, an artificial carbon layer can not only facilitate Li+ transport but also avoid the direct formation of the SEI layer on the surface of active particles. Compared to bare ZnS, the ZnS C/G electrode shows outstanding rate capability and cycling capacity (571 mA h g 1 after 120 cycles at a specific current of 1.0 A g 1 with a retention rate of 94.4% The high capacity at elevated current density is ascribed to the contribution of capacitive charge storage.

title: Determination of the thermodynamic functions of bismuth chalcoiodides by EMF method with morpholinium formate as electrolyte
abstract: Thermodynamic properties of bismuth chalcoiodides were determined experimentally by means of the electromotive force method (EMF) measurements of the Bi (solid) ionic liquid, Bi 3+ (Bi in alloy) (solid) concentration cells in the temperature range 300 390 K (sulfide system) and 300 450 K (selenide and telluride systems) Ionic liquid morpholinium formate with addition 0.5 mol% anhydrous BiCl 3 was used as an electrolyte. The equilibrium alloys from the different three phase regions of the corresponding systems were exploited as an anode. The EMF measurements made it possible to calculate the partial molar functions of bismuth in alloys from some three phase regions. Potential forming reactions were determined based on the solid phase equilibrium diagrams of the Bi X I systems. The standard thermodynamic functions of formation and standard entropies of the BiSI, Bi 19 S 27 I 3 BiSeI, BiTeI, Bi 2 TeI, and Bi 4 TeI 1.25 ternary compounds were calculated. The standard thermodynamic functions of BiI 3 ,as well as standard entropies of chalcogens, were used to the calculations. A good correspondence between experimental results and the literary data are shown.

title: Revealing Nanoscale Solid Solid Interfacial Phenomena for Long Life and High Energy All Solid State Batteries.
abstract: Enabling long cyclability of high voltage oxide cathodes is a persistent challenge for all solid state batteries, largely due to their poor interfacial stabilities against sulfide solid electrolytes. While protective oxide coating layers such as LiNbO3 (LNO) have been proposed, its precise working mechanisms are still not fully understood. Existing literature attributes reductions in interfacial impedance growth to the coating's ability to prevent interfacial reactions. However, its true nature is more complex, with cathode interfacial reactions and electrolyte electrochemical decomposition occurring simultaneously, making it difficult to decouple each effect. Herein, we utilized various advanced characterization tools and first principles calculations to probe the interfacial phenomenon between solid electrolyte Li6PS5Cl (LPSCl) and high voltage cathode LiNi0.85Co0.1Al0.05O2 (NCA) We segregated the effects of spontaneous reaction between LPSCl and NCA at the interface and quantified the intrinsic electrochemical decomposition of LPSCl during cell cycling. Both experimental and computational results demonstrated improved thermodynamic stability between NCA and LPSCl after incorporation of LNO coating. Additionally, we revealed the in situ passivation effect of LPSCl electrochemical decomposition. When combined, both these phenomena occurring at the first charge cycle result in a stabilized interface enabling long cyclability of all solid state batteries.

title: Enabling Thin and Flexible Solid State Composite Electrolytes by the Scalable Solution Process
abstract: All solid state batteries (ASSBs) have the potential to deliver higher energy densities, wider operating temperature range, and improved safety compared with today's liquid electrolyte based batteries. However, of the various solid state electrolyte (SSE) classes polymers, sulfides, or oxides none alone can deliver the combined properties of ionic conductivity, mechanical, and chemical stability needed to address scalability and commercialization challenges. While promising strategies to overcome these include the use of polymer/oxide or sulfide composites, there is still a lack of fundamental understanding between different SSE polymer solvent systems and its selection criteria. Here, we isolate various SSE polymer solvent systems and study their molecular level interactions by combining various characterization tools. With these findings, we introduce a suitable Li7P3S11SSE SEBS polymer xylene solvent combination that significantly reduces SSE thickness ~50 mm) The SSE polymer composite displays high