摘要
NASICON (Na-super-ionic-conductors)-structured materials have attracted extensive research interest due to their great application potential in secondary batteries. However, the mechanism of capacity fading for NASICON-structured electrode materials has been rarely studied. In this paper, we synthesized the NASICON-structured Na3V2(PO4)3/C composite by simple sol-gel and high-temperature solid-phase method and investigated its electrochemical performance in Na-Zn hybrid aqueous rechargeable batteries. After characterizing the structure, morphology and composition variations as well as the interfacial resistance changes of Na3V2(PO4)3/C cathode during cycling, we propose a mechanical and interfacial degradation mechanism for capacity fading of NASICON-structured Na3V2(PO4)3/C in Na-Zn hybrid aqueous rechargeable batteries. This work will shed light on enhancing the mechanical and in terfacial stability of NASICON-structured Na3V2(PO4)3/C in Na-Zn hybrid aqueous rechargeable batteries.
NASICON（Na-super-ionic-conductors）-structured materials have attracted extensive research interest due to their great application potential in secondary batteries. However, the mechanism of capacity fading for NASICON-structured electrode materials has been rarely studied. In this paper, we synthesized the NASICON-structured Na3V2（PO4）3/C composite by simple sol–gel and high-temperature solid-phase method and investigated its electrochemical performance in Na–Zn hybrid aqueous rechargeable batteries. After characterizing the structure, morphology and composition variations as well as the interfacial resistance changes of Na3V2（PO4）3/C cathode during cycling, we propose a mechanical and interfacial degradation mechanism for capacity fading of NASICON-structured Na3V2（PO4）3/C in Na–Zn hybrid aqueous rechargeable batteries. This work will shed light on enhancing the mechanical and interfacial stability of NASICON-structured Na3V2（PO4）3/C in Na–Zn hybrid aqueous rechargeable batteries.
基金
financially supported by"135"Projects Fund of CAS-QIBEBT Director Innovation Foundation
the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant no.XDA09010105)
the National Natural Science Foundation of China(Grant no.51502319)
the Think-Tank Mutual Fund of Qingdao Energy Storage Industry Scientific Research
the Qingdao Science and Technology Program(17-1-1-26-jch)
the Youth Innovation Promotion Association CAS(No.2017253)
Qingdao Key Lab of Solar Energy Utilization&Energy Storage Technology
