Implementation of binder-free SnO₂NWs@C electrode and LiTFSI-based electrolyte for high-performance lithium-ion battery

Abstract

This study has investigated the effect of carbon coating on the electrochemical performance of SnO2 Nanowires (NWs) as an electrode along with a bis (trifluoromethane) sulfonimide lithium (LiTFSI)-based electrolyte in a lithium-ion battery (LIB). The vapor-liquid-solid (VLS) approach has been used to grow SnO2 NWs on the stainless steel mesh current collector. The obtained results have demonstrated that the utilization of the LiTFSI-based electrolyte improved the battery performance with the SnO2 NWs electrode over the LiPF6-based electrolyte. This may be due to the formation of a stable and thin solid electrolyte interphase (SEI) layer. Since bare SnO2 NWs exhibit inferior cycling stability due to their high volumetric expansion and poor conductivity, incorporating carbon coating could improve performance. Although the initial discharge specific capacity obtained for the carbon-coated SnO2 NWs (SnO2 NWs@C) electrode (1328.4 mAh g-1) was in the order of the first discharge capacity for the SnO2 NWs, the SnO2 NWs@C electrode possessed capacity retention with 6 times improvement as compared to the pristine SnO2 NWs after 120 cycles. The coulombic efficiency of 99% has been achieved for the SnO2 NWs@C electrode over 120 cycles. Field Emission Scanning Electron Microscopy (FESEM) images revealed that the carbon coating could keep the overall structure of the electrode upon cycling. It has been evidenced that the SnO2 NWs@C electrode with LiTFSI-based electrolyte has an excellent potential to implement in high-performance LIBs.

Effect of ultra-sonication, vacuum drying, and carbon coating on the super-capacitive behavior of Ti3C2T x MXene

“…The MXene's surface was carbonized via a hydrothermal method using glucose [34,38,43]. First, 0.1 g of S-V-80 • C powder was dispersed in the mixture of 20 ml DI water and 5 ml Ethanol (Merk, 100 983) using magnetic stirring.…”

“…First, 0.1 g of S-V-80 • C powder was dispersed in the mixture of 20 ml DI water and 5 ml Ethanol (Merk, 100 983) using magnetic stirring. Then, 0.5 g of D-(+)-glucose monohydrate (Sigma-Aldrich 99.0% pure) was slowly dissolved into the suspension under stirring for 2 h. The solution was poured into the 100 ml Teflon-lined stainless-steel autoclave and heated at 170 • C for 24 h. Next, the suspension was washed several times with acetone [43]. Finally, the carbon-coated MXene (C@ S-V-80 • C) powder was dried at room temperature.…”

Superior performance of silicon nanowires@void@carbon on a conductive substrate as a scalable binder-free anode electrode for lithium-ion batteries

“…[7][8][9][10][11][12] In this regard, a great deal of research has been focused on creating batteries with increased specic energy, capacity, and safety. [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] It has been proven that LIBs with silicon-based anodes are capable of supporting these benets if properly engineered, and therefore, aer an enormous amount of investment and research in this eld, they have now found their way into commercial LIBs. [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49] Silicon-based anodes have been successfully employed in LIBs by nding solutions for their enormous volume change, unstable solid electrolyte interface (SEI) layer, and low electrical conductivity.…”