| Autor: |
Zhou, Ming, Wu, Mengrong, Yu, Haiwei, Zheng, Xiangjun, Shen, Kuan, Guo, Xingmei, Liu, Yuanjun, Cao, Fu, Gu, Hongxing, Kong, Qinghong, Zhang, Junhao |
| Zdroj: |
Chinese Journal of Chemical Engineering; March 2024, Vol. 67 Issue: 1 p78-88, 11p |
| Abstrakt: |
To address the low conductivity and easy agglomeration of transition metal sulfide nanoparticles, FeCoS4nanoparticles embedded in S-doped hollow carbon (FeCoS4@S-HC) composites were successfully fabricated through a combination of hydrothermal processes and sulfidation treatment. The unique bowl-shaped FeCoS4/S-HC composites exhibit excellent structural stability with a high specific surface area of 303.7 m2·g−1and a pore volume of 0.93 cm3·g−1. When applied as anode material for lithium-ion batteries, the FeCoS4@S-HC anode exhibits efficient lithium storage with high reversible specific capacity (970.2 mA·h·g−1at 100 mA·g−1) and enhanced cycling stability (574 mA·h·g−1at 0.2 A·g−1after 350 cycles, a capacity retention of 84%). The excellent lithium storage is attributed to the fact that the bimetallic FeCoS4nanoparticles with abundant active sites can accelerate the electrochemical reaction kinetics, and the bowl-shaped S-HC structure can provide a stable mechanical structure to suppress volume expansion. |
| Databáze: |
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