Heterostructured NiS_(2)@SnS_(2) hollow spheres as superior high-rate and durable anodes for sodium-ion batteries  

作　　者：Chongwei Li Jinchuan Hou Jingyi Zhang Xiaoyue Li Shiqi Jiang Guoqing Zhang Zhujun Yao Tiancun Liu Shenghui Shen Zhiqi Liu Xinhui Xia Jie Xiong Yefeng Yang 

机构地区：[1]School of Materials Science and Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China [2]State Key Laboratory of Silicon Materials,Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province,and School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China [3]MOE Key Laboratory of Advanced Textile Materials and Manufacturing Technology,Zhejiang Sci-Tech University,Hangzhou 310018,China [4]Hangzhou Yanqu Information Technology Co.,Ltd.,Hangzhou 310003,China

出　　处：《Science China Chemistry》2022年第7期1420-1432,共13页中国科学（化学英文版）

基　　金：funded by Zhejiang Provincial Natural Science Foundation of China (LY21E020010);the National Natural Science Foundation of China (52102315);the Fundamental Research Fund of Zhejiang Sci-Tech University (2021Y005)。

摘　　要：Tin-based sulfides have attracted increasing attention as anodes for sodium-ion batteries(SIBs) owing to their high theoretical capacity;however, the poor rate capability and inferior cycling stability caused by the low electrical conductivity, sluggish kinetics and drastic volume variations during cycling have greatly hampered their practical applications. Herein, heterostructured NiS_(2)@SnS_(2) hybrid spheres were delicately designed and constructed by anchoring interconnected SnS_(2) nanosheets on metalorganic frameworks(MOFs)-derived Ni S_(2) hollow spheres coupled with N-doped carbon skeleton through facile solvothermal and sulfurization/carbonization processes. The unique hollow heterostructure with highly conductive carbon matrix can effectively facilitate the charge transfer kinetics and ensure the desired buffer space while endowing more active sites and enhanced structural integrity, as demonstrated by the experimental and density functional theory(DFT) results. Benefitting from these merits, the NiS_(2)@SnS_(2) hybrid composite displays a high reversible capacity of 820 m Ah g^(-1) after 250 cycles at 1 A g^(-1), and retains a value of 673 m Ah g^(-1)after 1,300 cycles at 5 A g^(-1), manifesting the excellent high-rate and durable sodium storage behaviors when applied in SIBs. This study shall shed more light on the fabricating and interface engineering of other transition metal-based composite anodes for high-performance SIBs.

关 键 词：ANODE metal-organic frameworks HETEROSTRUCTURE bimetallic sulfide sodium ion battery 

分 类 号：TM912[电气工程—电力电子与电力传动] TB332[一般工业技术—材料科学与工程]