The preparation of SnS_(2)@NxC electrodes and its exceptional performance in energy storage usages  

作　　者：Zhen He Yuqian Wei Yunfei Song Jiaming Liu Yuxin Wang Muhammad D.Hayat 

机构地区：[1]School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 21000,China [2]School of Engineering,University of Waikato,Hamilton 3216,New Zealand

出　　处：《Chinese Journal of Chemical Engineering》2024年第12期75-82,共8页中国化学工程学报（英文版）

摘　　要：Tin sulfide(SnS_(2))anodes have garnered significant attention within emerging energy storage technologies.However,the application of SnS_(2)is curtailed due to its inherent limitations,including poor cyclic stability and inevitable volumetric expansion upon cycling.This study reports the successful fabrication of an innovative SnS_(2)-based composite,featuring an eggshell-like structured nitrogen-doped carbon coating,referred to as SnS_(2)@NxC.This novel architecture,wherein SnS_(2)acts as the core encapsulated by a nitrogen-doped carbon shell,characterized by a void space between the shell and core,is crucial in mitigating volumetric expansion.This configuration contributes to maintaining the structural integrity of the composite materials,even under the stresses of continuous cycling.Nitrogen within the carbon matrix enhances conductivity and promotes the formation of a more robust and stable solid electrolyte interphase(SEI)layer.Experimental investigations have substantiated the electrochemical superiority of the SnS_(2)@NxC electrode,demonstrating a specific capacity of 701.8 mA·h·g^(-1)after 1000 cycles at 0.5 A·g^(-1)and maintaining a capacity of 597.2mA·h·g^(-1)after 400 cycles at a heightened current density of 2 A·g^(-1).These findings underscore the exceptional cyclic performance and durability of the SnS_(2)@NxC electrode.

关 键 词：SnS_(2) Lithium-ion battery Cycling performance 

分 类 号：O646[理学—物理化学] TM912[理学—化学]