【摘 要】
：
Recently,sodium-ion batteries (SIBs),regarded as promising supplements for lithium-ion batteries (LIBs),especially in the large-scale energy storage field,are attracting more and more attention.However,the limited suitable cathode materials hinder the wid
【机 构】
：
State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems, China Electri
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Recently,sodium-ion batteries (SIBs),regarded as promising supplements for lithium-ion batteries (LIBs),especially in the large-scale energy storage field,are attracting more and more attention.However,the limited suitable cathode materials hinder the wide commercialization of SIBs.Given this aspect,in this work,a new layered oxide with 4d metal Tin was synthesized and investigated as cathode material for SIBs,Two optimized sodium-deficient O3-Na0.9Ni0.45Sn0.55O2 and O3-Na0.9Ni0.4Mn0.1Sn0.5O2 were selected for comprehensive investigation,both of which exhibited high operating voltage of around 3.45V with smooth charge/discharge curves.In comparison,O3-Na0.9Ni0.4Mn0.1Sn0.5O2 shows a higher reversible capacity (65mAh/g,0.1 C),better rate capability and cycling stability than that of O3-Na0.9Ni0.45Sn0.55O2 (50mAh/g,0.1 C),indicating that a small amount of Mn-substitution can improve the electrochemical performance.This work presents a new possibility of discovering potential cathode candidates by exploring the Tin-based layered oxides.
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