Fe_(2)O_(3)-MWNTs Composite with Reinforced Concrete Structure as High-performance Anode Material for Lithium-ion Batteries  

作　　者：WANG Suhang ZUO Jinxin LI Yongliang ZHONG Yiming REN Xiangzhong ZHANG Peixin SUN Lingna 

机构地区：[1]College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen,518060,P.R.China [2]Babel International College,Perth,WA,6100,Australia

出　　处：《Chemical Research in Chinese Universities》2023年第2期240-245,共6页高等学校化学研究（英文版）

基　　金：National Natural Science Foundation of China(Nos.21471100,21704066);Guangdong Basic and Applied Basic Research Foundation,China(No.2021A1515010241);Shenzhen Natural Science Fund,China(the Stable Support Plan Program)(No.20200813081943001).

摘　　要：A Fe_(2)O_(3)-MWNTs(multi-walled carbon nanotubes)composite with a reinforced concrete structure was fabricated employing a two-step method which involves a sol-gel process followed by high-temperature in situ sintering.This Fe_(2)O_(3)-MWNTs composite,intended to be used as an anode material for lithium-ion batteries,maintained a reversible capacity as high as 896.3 mA·h/g after 100 cycles at a current density of 100 mA/g and the initial coulombic efficiency reached 75.5%.The rate capabilities of the Fe_(2)O_(3)-MWNTs composite,evaluated using the ratios of capacity at 100,200,500,1000,2000 and 100 mA/g after every 10 cycles,were determined to be 904.7,852.1,759.0,653.8,566.8 and 866.3 mA·h/g,respectively.Such a superior electrochemical performance of the Fe_(2)O_(3)-MWNTs composite is mainly attributed to the reinforced concrete construction,in which the MWNTs function as the skeleton and conductive network.Such a structure contributes to shortening the transport pathways for both Li+and electrons,enhancing conductivity and accommodating volume expansion during prolonged cycling.This Fe_(2)O_(3)-MWNTs composite with the designed structure is a promising anode material for high-performance lithium-ion batteries.

关 键 词：Lithium-ion battery Anode material Fe_(2)O_(3)-multi-walled carbon nanotubes(MWNTs)composite Sol-gel Reinforced concrete structure 

分 类 号：TM912[电气工程—电力电子与电力传动] TB33[一般工业技术—材料科学与工程]