首页|Sodium-Coordinated Polymeric Phthalocyanines as Stable High-Capacity Organic Anodes for Sodium-Ion Batteries
Sodium-Coordinated Polymeric Phthalocyanines as Stable High-Capacity Organic Anodes for Sodium-Ion Batteries
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维普
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Sodium-ion batteries(SIBs)have attracted considerable interest as an alternative to lithium-ion batteries owing to their similar electrochemical performance and superior long-term cycle stability.Organic materials are regarded as promising anode materials for constructing SIBs with high capacity and good retention.However,utilization of organic materials is rather limited by their low energy density and poor stability at high current densities.To overcome these limitations,we utilized a novel polymeric disodium phthalocyanines(pNaPc)as SIB anodes to provide stable coordination sites for Na ions as well as to enhance the stability at high current density.By varying the linker type during a one-pot cyclization and polymerization process,two pNaPc anodes with O-(O-pNaPc)and S-linkers(S-pNaPc)were prepared,and their structural and electrochemical properties were investigated.The O-pNaPc binds Na ions with a lower binding energy compared with S-pNaPc,which leads to more facile Na-ion coordination/dissociation when engaged as SIB anode.The use of O-pNaPc significantly improves the redox kinetics and cycle stability and allows the fabrication of a full cell against Na3V2(PO4)2F3/C cathode,which demonstrates its practical application with high energy density(288 Wh kg-1)and high power density(149 W kg-1).
coordination chemistryorganic anodephthalocyaninepolymerizationsodium ion battery
Jeongyeon Lee、Yoonbin Kim、Soyong Park、Kang Ho Shin、Gun Jang、Min Jun Hwang、Daekyu Kim、Kyung-Ah Min、Ho Seok Park、Byungchan Han、Dennis K.P.Ng、Lawrence Yoon Suk Lee
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Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy,The Hong Kong Polytechnic University,Hung Hom,Kowloon Hong Kong SAR China
Department of Chemistry,The Chinese University of Hong Kong,Shatin,New Territories Hong Kong SAR China
Convergence Research Center for Energy and Environmental Sciences,Sungkyunkwan University,Suwon Korea
Department of Chemical and Biomolecular Engineering,Yonsei University,Seoul Korea
School of Chemical Engineering,Sungkyunkwan University,Suwon Korea
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Research Grants Council of the Hong Kong Special Administrative RegionHong Kong Polytechnic UniversityInitiative for fostering University of Research and Innovation Program of the National Research Foundation(NRF)Korean government(MSIT)award of Hong Kong Ph.D.Fellowship
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