Preparation and lithium storage performances of g-C_(3)N_(4)/Si nanocomposites as anode materials for lithium-ion battery

作     者：Zhengxu BIAN Zehua TANG Jinfeng XIE Junhao ZHANG Xingmei GUO Yuanjun LIU Aihua YUAN Feng ZHANG Qinghong KONG Zhengxu BIAN;Zehua TANG;Jinfeng XIE;Junhao ZHANG;Xingmei GUO;Yuanjun LIU;Aihua YUAN;Feng ZHANG;Qinghong KONG

作者机构：School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang 212003China Marine Equipment and Technology InstituteJiangsu University of Science and TechnologyZhenjiang 212003China Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu ProvinceYancheng Institute of TechnologyYancheng 224051China School of the Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China 

出 版 物：《Frontiers in Energy》 (能源前沿（英文版）)

年 卷 期：2020年第14卷第4期

页      面：759-766页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：the National Natural Science Foundation of China(Grant Nos.51672114 and 51603091) the Natural Science Foundation of Jiangsu Province(BK20181469) the Joint Open Fund of Jiangsu Collaborative Innovation Center for Ecological Building Material and Environmental Protection Equipment and Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province,the Open Project of Key Laboratory for Ecological-Environment Materials of Jiangsu Province(JH201815) the Foundation from Marine Equipment and Technology Institute for Jiangsu University of Science and Technology,China(HZ20190004) 

主　　题：magnesium thermal reduction g-C_(3)N_(4)/Si nanocomposites volume expansion electroconductivity lithium-ion battery 

摘      要：As the anode material of lithium-ion battery,silicon-based materials have a high theoretical capacity,but their volume changes greatly in the charging and discharging *** ameliorate the volume expansion issue of silicobased anode materials,g-C_(3)N_(4)/Si nanocomposites are prepared by using the magnesium thermal reduction *** is well known that g-C_(3)N_(4)/Si nanocomposites can not only improve the electronic transmission ability,but also ameliorate the physical properties of the material for adapting the stress and strain caused by the volume expansion of silicon in the lithiation and delithiation *** g-C_(3)N_(4)/Si electrode is evaluated,the initial discharge capacity of g-C_(3)N_(4)/Si nanocomposites is as high as 1033.3 mAh/g at 0.1 A/g,and its reversible capacity is maintained at 548 mAh/g after 400 ***,the improved rate capability is achieved with a relatively high reversible specific capacity of 218 mAh/g at 2.0 A/*** superior lithium storage performances benefit from the unique g-C_(3)N_(4)/Si nanostructure,which improves electroconductivity,reduces volume expansion,and accelerates lithiumion transmission compared to pure silicon.