Facile construction of honeycomb-shaped porous carbon electrode materials using recyclable sodium chloride template for efficient lithium storage

作     者：FANG ShiQing HE HaoXuan YU YingHui LI Xiao XIE WeiCheng LI Wei JIN LuQiao YANG ZhenYu CAI JianXin FANG ShiQing;HE HaoXuan;YU YingHui;LI Xiao;XIE WeiCheng;LI Wei;JIN LuQiao;YANG ZhenYu;CAI JianXin

作者机构：School of Resources Environmental&Chemical EngineeringNanchang UniversityNanchang 330031China College of ChemistryNanchang UniversityNanchang 330031China 

出 版 物：《中国科学：技术科学英文版》 (Science China Technological Sciences)

年 卷 期：2020年第63卷第10期

页      面：2123-2130页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 07[理学] 08[工学] 070205[理学-凝聚态物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China(Grant Nos.51662029 and 21363015) the Graduate Innovation Fund Projects of Jiangxi Province(Grant No.YC2018-S013)。 

主　　题：lithium-ion batteries polyvinyl-pyrrolidone sodium chloride honeycomb-shaped porous carbon materials 

摘      要：Carbon materials are the preferred anode materials for Li-ion batteries.Here,we propose an easy and sustainable strategy to prepare honeycomb-shaped porous carbon(HPC)electrode materials through a process involving simple calcination and subsequent water washing by using polyvinyl-pyrrolidone(PVP)as carbon source and NaCl as pore-forming agent.A controllable cavity size and distribution of the carbon materials can be readily obtained solely by adjusting the NaCl amount.Results showed that the optimized HPC sample had a relatively uniform cavity distribution and a highly porous structure.Moreover,the special honeycomb-shaped structure was conducive to the electronic conductivity of the electrode materials,provided a short path for Li-ion transport and a wide interface with the electrolyte,and buffered the volume change of active materials.The special honeycomb-shaped structure was also maintained well after long cycles,which improved electrode stability.When used as anode materials for Li-ion batteries(LIBs),the sample demonstrated excellent cycling stability and rate performance,with a high specific capacity of 230 mA hg^-1 and a reversible capacity of 197 mA hg^-1,after 1200 cycles at 2 C.Overall,we introduced a simple strategy for the potential mass production of porous carbon materials for LIBs.