Strongly coupled Te-SnS_(2)/MXene superstructure with self-autoadjustable function for fast and stable potassium ion storage  

作　　者：Hongyang Sun Yelong Zhang Xiaodan Xu Jianwen Zhou Fan Yang Hao Li Hao Chen Yucheng Chen Zheng Liu Zhenping Qiu Da Wang Lipo Ma Jiawei Wang Qingguang Zeng Zhangquan Peng 

机构地区：[1]School of Applied Physics and Materials,Wuyi University,Jiangmen 529020,Guangdong,China [2]Jiangmen Advanced Battery Material Engineering and Technology Research Center,Jiangmen 529020,Guangdong,China [3]Laboratory of Advanced Spectro-Electrochemistry and Lithium-Ion Batteries,Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China

出　　处：《Journal of Energy Chemistry》2021年第10期416-424,I0011,共10页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(22005223 and 21975187);the Natural Science Foundation of Guangdong Province(No.2019A1515012161);the Special Innovational Project of Department of Education of Guangdong Province(No.2019KTSCX186 and 2017KCXTD031);the Science Foundation for Young Teachers of Wuyi University(2019td01);the Science Foundation for HighLevel Talents of Wuyi University(2018RC50 and 2017RC23);the Innovative Leading Talents of Jiangmen(Jiangren(2019)7);the Science and Technology Projects of Jiangmen(No.(2017)307,(2017)149,(2018)352);the Newton Advanced Fellowships(NAF/R2/180603);the Wuyi University-Hong Kong-Macao Joint Research Project(2019WGALH10);the Laboratory of Optoelectronic Materials and Applications in Guangdong Higher Education(2017KSYS011);the College Student Innovation and Entrepreneurship Training Program Project(2019CX27,2019CX32,2019CX41,201911349021,201911349025)。

摘　　要：Potassium-ion batteries(PIBs)are a promising candidate for next-generation electric energy storage applications because of the abundance and low cost of potassium.However,the development of PIBs is limited by sluggish kinetics and huge volume expansion of anodes,leading to poor rate capability and cycling stability.Herein,an advanced superstructure anode,including Te-doped SnS_(2) nanosheets uniformly anchored on MXene surface(Te-SnS_(2)/MXene),is rationally designed for the first time to boost K^(+)storage performance.Featuring with strong interface interaction and self-autoadjustable interlayer spacings,the Te-SnS_(2)/MXene can efficiently accelerate electron/ion transfer,accommodate volume expansion,inhibit crack formation,and improve pseudocapacitive contribution during cycling.Thus,the novel Te-SnS_(2)/MXene anode delivers a high reversible capacity(343.2 mAh g^(-1) after 50 cycles at0.2 A g^(-1)),outstanding rate capability(186.4 mAh g^(-1) at 20 A g^(-1)),long cycle stability(165.8 mAh g^(-1)after 5000 cycles at 10 A g^(-1) with a low electrode swelling rate of only 15.4%),and reliable operation in flexible full battery.The present Te-SnS_(2)/MXene becomes among the best transition metal-based anode materials for PIBs reported to date.

关 键 词：Tin disulfide MXene Tellurium doping Potassium-ion battery 

分 类 号：TM912[电气工程—电力电子与电力传动] TB34[一般工业技术—材料科学与工程]