N/S co-doped carbon nanosheet bundles as high-capacity anode for potassium-ion battery

作     者：Jinhui Cao Jiang Zhong Hanjiao Xu Shengyang Li Hongli Deng Tao Wang Ling Fan Xinghui Wang Lei Wang Jian Zhu Bingan Lu Xidong Duan Jinhui Cao;Jiang Zhong;Hanjiao Xu;Shengyang Li;Hongli Deng;Tao Wang;Ling Fan;Xinghui Wang;Lei Wang;Jian Zhu;Bingan Lu;Xidong Duan

作者机构：Hunan Key Laboratory of Two-Dimensional MaterialsState Key Laboratory for Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China School of Physics and ElectronicsHunan UniversityChangsha 410082China College of Physics and Information EngineeringInstitute of Micro-Nano Devices and Solar CellsFuzhou UniversityFuzhou 350108China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2022年第15卷第3期

页      面：2040-2046页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(Nos.52074113 and 22005091) the Fundamental Research Funds of the Central Universities(No.531107051048) Xidong Duan acknowledges support by the National Natural Science Foundation of China(No.51872086) the Hunan Key Laboratory of Two-Dimensional Materials(No.2018TP1010) the Innovative Research Groups of Hunan Province(No.2020JJ1001) 

主　　题：potassium-ion battery anode carbon nanosheet bundles N/S co-doping high capacity long cycle 

摘      要：Potassium-ion batteries(PIBs)are of academic and economic significance,but still limited by the lack of highly active electrode materials for de-/intercalation of large-radius K ***,an interconnected nitrogen/sulfur co-doped carbon nanosheep bundle(N/S-CSB)was proposed as the potassium ions storage *** rich co-doping of nitrogen/sulfur of N/S-CNB with three-dimensional hierarchical bundled array structure yields distensible interlayer spaces to buffer the volume expansion during K+insertion/extraction,offers more electrochemical active sites to obtain a high specific capacity,and provides efficient channels for fast ion/electron ***,the N/S-CSB anode achieved high reversible specific capacity of 365 mAh/g obtained at 50 mA/g after 200 cycles with a coulombic efficiency(CE)close to 100%,high rate performance and long cycle ***,the in-situ Raman spectra indicated outstanding reaction kinetics of as-prepared N/S-CSB anode.