Optimized CeO2 Nanowires with Rich Surface Oxygen Vacancies Enable Fast Li-Ion Conduction in Composite Polymer Electrolytes

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外文摘要：Low-cost and flexible solid polymer electrolytes are promising in all-solid-state Li-metal batteries with high energy density and safety.However,both the low room-temperature ionic conductivities and the small Li+transference number of these electrolytes significantly increase the internal resistance and overpotential of the battery.Here,we introduce Gd-doped CeO2 nanowires with large surface area and rich surface oxygen vacancies to the polymer electrolyte to increase the interaction between Gd-doped CeO2 nanowires and polymer electrolytes,which promotes the Li-salt dissociation and increases the concentration of mobile Li ions in the composite polymer electrolytes.The optimized composite polymer electrolyte has a high Li-ion conductivity of 5 × 10-4 S cm-1 at 30 ℃ and a large Li+transference number of 0.47.Moreover,the composite polymer electrolytes have excellent compatibility with the metallic lithium anode and high-voltage LiNi0.8Mn0.1Co0.1O2(NMC)cathode,providing the stable cycling of all-solid-state batteries at high current densities.

外文关键词：

composite polymer electrolytesGd-doped CeO2 nanowiresLi-ion conductionoxygen vacanciessurface interaction

作者：

Lu Gao、Nan Wu、Nanping Deng、Zhenchao Li、Jianxin Li、Yong Che、Bowen Cheng、Weimin Kang、Ruiping Liu、Yutao Li

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作者单位：

State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes,School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China

Materials Science and Engineering Program and Texas Materials Institute,The University of Texas at Austin,Austin TX 78712,USA

Department of Materials of Science and Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China

Enpower Energy Corp.,Beijing 102600,China

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaTianjin Natural Science FoundationSpecial Grade of the Financial Support from the China Postdoctoral Science FoundationScience and Technology Plans of TianjinScience & Technology Development Fund of Tianjin Education Commission for Higher EducationState Key Laboratory of Membrane and Membrane Separation,Tiangong University

项目编号：

519731576190412318JCQNJC029002020T13046919PTSYJC000102018KJ196

出版年：

2023

DOI：

10.1002/eem2.12272

能源与环境材料(英文)

CSCD

ISSN：

年,卷(期)：2023.6(1)

被引量1
参考文献量51