Sulfur-doped CMK-5 with expanded lattice for high-performance lithium ion batteries  

作　　者：Zhenjin Liang Yuhao Peng Xing Zhang Kewei Cao Wei Xiao Dong Gu 

机构地区：[1]The Institute for Advanced Studies,Wuhan University,Wuhan 430072,China [2]College of Chemistry and Molecular Sciences,Hubei Key Laboratory of Electrochemical Power Sources,Wuhan University,Wuhan 430072,China

出　　处：《Chinese Chemical Letters》2023年第7期279-283,共5页中国化学快报（英文版）

基　　金：funding from the National Key R&D Program of China (No. 2018YFE0201703);the National Natural Science Foundation of China (Nos. 22272120, U2202251);the “1000-Youth Talents Plan”。

摘　　要：Heteroatom-doped porous carbon materials are very attractive for lithium ion batteries(LIBs) owing to their high specific surface areas, open pore structures, and abundant active sites. However, heteroatomdoped porous carbon with very high surface area and large pore volume are highly desirable but still remain a big challenge. Herein, we reported a sulfur-doped mesoporous carbon(CMK-5-S) with nanotubes array structure, ultrahigh specific surface area(1390 m^(2)/g), large pore volume(1.8 cm^(3)/g), bimodal pore size distribution(2.9 and 4.6 nm), and high sulfur content(2.5 at%). The CMK-5-S used as an anode material for LIBs displays high specific capacity, excellent rate capability and highly cycling stability. The initial reversible specific capacity at 0.1 A/g is as high as 1580 mAh/g and simultaneously up to 701 mAh/g at 1A/g even after 500 cycles. Further analysis reveals that the excellent electrochemical storage performances is attributed to its unique structures as well as the expanded lattice by sulfur-doping.

关 键 词：Mesoporous material CMK-5 Hollow structure Sulfur-doping Lithium ion batteries 

分 类 号：TQ127.11[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]