NiS_(2)/FeS Heterostructured Nanoflowers for High-Performance Sodium Storage  

作　　者：Dong Yan Shuhao Xiao Xinyan Li Jinxia Jiang Qiyuan He Hanchao Li Jiaqian Qin Rui Wu Xiaobin Niu Jun Song Chen 

机构地区：[1]Institute for Advanced Study,Chengdu University,Chengdu 610106,P.R.China [2]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 610054,P.R.China [3]Chongqing Medical and Pharmaceutical College,Chongqing 401331,P.R.China [4]Department of Materials Science and Engineering,City University of Hong Kong,Kowloon,Hong Kong,China [5]Center of Excellence on Advanced Materials for Energy Storage,Metallurgy and Materials Science Research Institute,Chulalongkorn University,Bangkok 10330,Thailand [6]Shenzhen Institute for Advanced Study,University of Electronic Science and Technology of China,Shenzhen,P.R.China

出　　处：《Energy Material Advances》2023年第1期57-66,共10页能源材料前沿（英文）

基　　金：National Key R&D Program of China(No.2021YFB2401900).

摘　　要：Transition metal sulfides demonstrate attractive potential for sodium storage owing to their high theoretical specific capacity and high reserve.However,the low conductivity and volume expansion deteriorate their high-rate performance and cycling stability.In this work,we construct NiS_(2)/FeS heterostructure by growing Ni-based layered double hydroxide nanosheets on Fe-based Prussian Blue nanocrystals followed by gaseous sulfurization,giving rise to flower-like NiS_(2)/FeS nanoparticles.The as-prepared nanocomposite exhibits good rate performance of 156 mAh g^(−1) at 50 A g^(-1) and long cycle life of 606 mAh g^(−1) at 5 A g^(−1) after 1,000 cycles,which are superior to the heterostructure-free counterpart of NiS_(2) and FeS.Density functional theory calculation further verifies that the enhanced electrochemical performance of NiS_(2)/FeS is due to the existence of interface derived from the heterostructure.

关 键 词：FLOWERS ATTRACTIVE CYCLING 

分 类 号：TB383[一般工业技术—材料科学与工程]