Sodium-ion batteries(SIBs)have been recently considered as an intriguing candidate for next-generation battery systems with their advantages in large-scale energy storage applications.However,the design of electrode ma-terials of SIBs still suffers from severe volume expansion and low capacity caused by the larger ion radius,high re-dox potential and heavy atom weight of Na.Organic electrode materials with structural flexibility have attracted great attention recently for their potential in alleviating volume expansion.However,most organic electrode materials suffer from dissolution in electrolytes and consequent capacity fading during the long-term cycling process.In this work,a method coordinating with Co2+was applied to solve the shuttle effect of H4salphdc(N,N'-phenylene-bis-(salicylideneimine)dicarboxylic acid).By virtue of the Co2+coordination,the Co(H2salphdc)electrode delivered a desirable discharge capacity of 123 mAh g-1 after 1500 cycles at the current density of 200 mA g-1,while the H4salphdc electrode exhibited severe capacity fading.Such excellent electrochemical perfor-mance can be credited to the Co2+coordination repressing the electrode dissolution and improving the structure stability.

Mengyuan Yue;Huinan Guo;Zhaoxia Yuan;Weiqin Li;Yafei Liu;Kai Chen;Yusang Guo;Yijing Wang

Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Renewable Energy Conversion and Storage Center,College of Chemistry,Nankai University,Tianjin,300071,China

自然科学进展·国际材料（英文）

[1]Mengyuan Yue;Huinan Guo;Zhaoxia Yuan;Weiqin Li;Yafei Liu;Kai Chen;Yusang Guo;Yijing Wang-.Cobalt coordination modified double-schiff-base with low solubility as a long-cycle life anode for sodium-ion batteries)[J].自然科学进展·国际材料（英文）,2022(04):510-516

Co2+was,H4salphdc,salicylideneimine,Co2+coordination,H2salphdc

Cobalt,modified,double,schiff,base,low,solubility,long,life,anode,sodium,batteries,Sodium,SIBs,have,been,recently,considered,intriguing,candidate,next,generation,battery,systems,their,advantages,scale,energy,storage,applications,However,design,electrode,still,suffers,from,severe,volume,expansion,capacity,caused,by,larger,radius,high,dox,potential,heavy,atom,weight,Na,Organic,materials,structural,flexibility,attracted,great,attention,alleviating,most,organic,dissolution,electrolytes,consequent,fading,during,term,cycling,process,In,this,work,method,coordinating,applied,solve,shuttle,effect,phenylene,bis,dicarboxylic,acid,By,virtue,delivered,desirable,discharge,mAh,after,cycles,current,density,while,exhibited,Such,excellent,electrochemical,perfor,mance,credited,repressing,improving,structure,stability

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