Eu3+ doped hydroxyapatite nanowires enabling solid-state electrolytes with enhanced ion transport  

作　　者：Xiaoyue Wang Hong Zhang Lin Xu Liqiang Mai 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China [2]Hubei Longzhong Laboratory,Wuhan University of Technology(Xiangyang Demonstration Zone),Xiangyang 441000,China [3]Hainan Institute,Wuhan University of Technology,Sanya 572000,China

出　　处：《Journal of Materials Science & Technology》2024年第19期104-109,共6页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52272234 and 51832004);the Key Research and Development Program of Hubei Province(No.2021BAA070);the Independent Innovation Projects of the Hubei Longzhong Laboratory(No.2022ZZ-20);the Sanya Science and Education Innovation Park of Wuhan University of Technology(No.2021KF0011).

摘　　要：The polymer-based solid-state electrolytes (PSEs) are promising for solid-state batteries but they have deficiencies such as low ionic conductivity, low lithium-ion transference number, and unstable electrode/electrolyte interface. Herein, we designed a hydroxyapatite nanowire doped with high-valence cations in anticipation of the formation of positively charged active sites on the nanowire surface. The higher surface activity can reduce the reaction activation energy on the nanowire surface and adsorb the anions in the PSEs as a way to improve the ionic conductivity and Li+ transference number of the PSEs. The active sites on the surface of the nanowires anchor the anions, thus increasing the Li+ transference number to 0.38, which effectively improves the ionic conductivity of the PSE to 1.58 × 10-4 S cm-1 at room temperature. At the same time, the composite polymer electrolyte has a wide electrochemical window. The lithium symmetric cell stably cycles for 800 h at a current density of 0.1 mA cm-2, and the LiFePO4||Li full cell steadily cycles for 180 cycles at a rate of 0.5 C with a capacity retention of 94.2 %. The ion doping strategy to change the surface electrical behavior of nanowires provides an idea to improve the ionic conductivity of solid-state electrolytes.

关 键 词：NANOWIRES Ion doping Active site Polymer-based solid-state electrolyte 

分 类 号：TB383[一般工业技术—材料科学与工程]