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

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

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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 elec-trode/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+transfer-ence 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.

NanowiresIon dopingActive sitePolymer-based solid-state electrolyte

Xiaoyue Wang、Hong Zhang、Lin Xu、Liqiang Mai

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State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China

Hubei Longzhong Laboratory,Wuhan University of Technology(Xiangyang Demonstration Zone),Xiangyang 441000,China

Hainan Institute,Wuhan University of Technology,Sanya 572000,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaKey Research and Development Program of Hubei ProvinceIndependent Innovation Projects of the Hubei Longzhong LaboratorySanya Science and Education Innovation Park of Wuhan University of Technology

52272234518320042021BAA0702022ZZ-202021KF0011

2024

10.1016/j.jmst.2023.10.051

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.186(19)
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