首页|Interface engineering of Co9S8/SnS heterostructure as a high-performance anode for lithium/sodium-ion batteries
Interface engineering of Co9S8/SnS heterostructure as a high-performance anode for lithium/sodium-ion batteries
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Transition metal sulfide(TMS)anodes exhibit the characteristics of phase stability and high capacity for lithium/sodium-ion batteries(LIBs/SIBs).However,the TMS anodes often suffer from poor electronic conductiv-ity,low ionic diffusion and large volume expansion during Li/Na-ion intercalation significantly impairing the Li/Na-storage performance.Herein,a long chain heterostructure composed of the Co9S8 and SnS are first reported,which can generate rich phase interfaces,and small crystal domains.The unique structure can facilitate the properties of reactivity,conductivity and ionic diffusion.In addition,the heterostructure surface is modified by the N-doped carbon(N-DC@(CoSn)S),successfully improving the structural stability.The synergistic effects of Co9S8/SnS heterostructure and coated carbon layer effectively increase the capacity and cycling stability.The N-DC@(CoSn)S anode delivers enhanced high specific capacities of 820.6 mAh·g-1 at 1.0 A·g-1 after 500 cycles for LIBs and 339.2 mAh·g-1 at 0.5 A·g-1 after 1000 cycles for SIBs,respectively.This work is expected to provide a material design idea for preparing LIBs/SIBs with high capacity and long cycling life.
School of Chemistry and Chemical Engineering,Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials,Hunan Institute of Science and Technology,Yueyang 414006,China
Hubei Jiufengshan Laboratory,Wuhan 430206,China
International Iberian Nanotechnology Laboratory(INL),Av.Mestre Jose Veiga,4715-330 Braga,Portugal
国家自然科学基金国家自然科学基金HORIZON-Marie Sk?odowska-Curie Actions-2021-PF湖南省自然科学基金湖南省教育厅科研项目Science and Technology Innovation Program of Hunan Province
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