# Intercalating Sn/Fe Nanoparticles in Compact Carbon Monolith for Enhanced Lithium Ion Storage
## 5 Conclusions  
In summary, a high-performance LIB anode comprising the sub-10 nm SnO\({}_{2}\) and Fe\({}_{2}\)O\({}_{3}\) oxide nanocrystals intercalated inside a compact carbon monolith is successfully exoggated through an expeditious gel pyrolysis protocol to integrate the advanced nature of the embedding structure and multicomponent synergy. As a result of spatial confinement effect for effectively relaxing mechanical stress originating from the volume expansion of the SnO\({}_{2}\) nanoparticles, the improved electronic conductivity by the continuous carbon matrix and the enhanced Li\({}^{+}\)/e\({}^{-}\) transfer by the driving of the built-in electric field generated at around heterointerfaces between SnO\({}_{2}\) and Fe\({}_{2}\)O\({}_{3}\), the SnO\({}_{2}\) grain  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Electrode Materials** & \begin{tabular}{c} **Current** \\ **Density (Ag-1)** \\ \end{tabular}  & \begin{tabular}{c} **Initial** \\ **Coulombic** \\ **Efficiency** \\ \end{tabular}  & \ \begin{tabular}{c} **Retained** \\ **(Anb g-1)** \\ \end{tabular}  & \begin{tabular}{c} **Cyde** \\ **Numbers** \\ \end{tabular}  & **Refs. ** \\ \hline B-SFOO6C-400 & 0.2 & 67.3\% & 726 & 100 & This work \\ Carbon-encapsulated Porous SnO\({}_{2}\) & 0.05 & 41.6\% & 870.9 & 120 & [75] \\ SnO\(\oplus\)CNT & 0.2 & 62.5\% & 546 & 100 & [76] \\ rGO(Fe\({}_{2}\)O\({}_{3}\)/SnO\({}_{2}\) & 0.4 & 63\% & 700 & 100 & [77] \\ \(\alpha\)-Fe\({}_{2}\)O\({}_{3}\) nanotivelySnO\({}_{2}\) & 0.2 & 46\% & 795 & 220 & [78] \\ SnO\({}_{2}\)/MoO/KSO & 0.2 & 64.9\% & 692 & 50 & [79] \\ Smo\({}_{3}\)Fe\({}_{2}\)O\({}_{3}\)/SWCNTs & 0.5 & 65.9\% & 786.7 & 60 & [26] \\ Smo\({}_{3}\)Fe\({}_{2}\)O\({}_{3}\) hybrid nanofibers & 0.4 & Non & 672 & 100 & [80] \\ Carbon shellped porous SnO\({}_{3}\)-8 nanosheet array & 1 & Ag\({}^{-1}\) & 543 & 1000 & [81] \\ Nanoflualy MnO\({}_{3}\)/carbon nanotube nanocomposites & 0.2 & 57\% & 620 & 50 & [82] \\ Hierarchical TiO\({}_{2}\)nanowire\({}_{2}\)Fe\({}_{2}\)O\({}_{3}\) nanoform core-branch & 0.1 & Non & 709 & 50 & [83] \\ Hierarchically branched TiO\({}_{2}\)SnGeO\({}_{2}\) nanoffers & 0.5 & Non & 453.3 & 100 & [84] \\ Meoropous ZrGeO\({}_{2}\)O\({}_{3}\)-2 GeO\({}_{3}\) hybrid nanotube arrays & 0.2 & 82.8\% & 1064 & 100 & [85] \\ TiO\(\oplus\)Fe\({}_{2}\)O\({}_{3}\) core-shell nanotube arrays with double-wall coating & 0.1 & Non & 450 & 600 & [86] \\ Hollow amorphous MnSnO\({}_{3}\) nanohybrid with N-doped graphene & 0.2 & 54.8\% & 707 & 110 & [87] \\ TiO\(\oplus\)GeGeO\({}_{3}\) core-shell-branch hybrid nanoarrays & 0.5 & Non & 433 & 200 & [88] \\ Highly porous MnO\({}_{3}\)O\({}_{2}\) microjuncchoudoids\(\oplus\)CC & 0.5 & 58.4\% & 1014 & 500 & [89] \\ Nanowireire microwave NbNiC\({}_{3}\)5\({}_{3}\) nanwall arrays & 0.2 & 56\% & 713 & 100 & [90] \\ Fe\({}_{2}\)O\({}_{3}\)/carbon core-shell nanotubes & 0.5 & 73\% & 560 & 100 & [91] \\ SnO\({}_{2}\) nanocrystals in amorphous carbon & 0.62 & 43.5\% & 400 & 100 & [92] \\ Boron doped graphene SnO\({}_{2}\) & 0.1 & 49.2\% & 744 & 100 & [56] \\ SnO\({}_{3}\) quantum dots\(\oplus\)5-doped RGO & 0.5 & Non & 606 & 500 & [93] \\ Na\(\Sigma\)O\({}_{3}\) & 0.2 & Non & 480 & 100 & [94] \\ SnO\({}_{3}\) quantum dots on reduced graphene & 0.5 & Non & 635.9 & 100 & [95] \\ Hierarchical nano launched e-Si\({}_{3}\)SrO\({}_{2}\) nanowires & 0.36 & 50\% & 1200 & 100 & [96] \\ Ultrafine So\({}_{3}\)/eC nanopophores & 0.1 & 45.7\% & 928.9 & 100 & [97] \\ embedded in carbon film with honey-like structure & 0.2 & 58\% & 712.6 & 300 & [98] \\ Dual carbon shell coated S\({}_{3}\)O\({}_{3}\)/n nanowires & 0.2 & 58\% & 620 & 200 & [25] \\ Porous hollow SiO\({}_{2}\)-graphene aerogel hybrid & 0.05 & 65.84\% & 620 & 200 & [25] \\ Cu\({}_{3}\)Sn intermetallic\({}_{3}\)-Ca carbon core-shell & 0.2 & Non & 619 & 500 & [99] \\ Bahencei \({}_{3}\)Fe\({}_{3}\)/SrO\({}_{2}\) nano-heterobstructures & 1.