首页|Boron nitride nanofibers enhanced composite PEO-based solid-state polymer electrolytes for lithium metal batteries

Boron nitride nanofibers enhanced composite PEO-based solid-state polymer electrolytes for lithium metal batteries

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Polyethylene oxide(PEO)-based solid-state polymer electrolytes(SPEs)are limited by their poor cyclic sta-bility and inferior ionic conductivity for applicating in high-safety,long-cycling and high-energy-density lithium metal batteries.Herein,porous boron nitride nanofibers(BNNFs)are filled into PEO-based SPE,which significantly suppresses Li dendrites growth and enhances the electrochemical performance of Li metal battery.BNNFs with high porosity have more active sites to connect with PEO,which can effec-tively reduce the crystallinity of the PEO matrix and enhance its ionic conductivity.Moreover,owing to the hardness and good stability of BNNFs,BNNFs/PEO/LiTFSI electrolyte exhibits a wider electrochemical window,better mechanical property and higher thermal stability compared with PEO/LiTFSI electrolyte.Consequently,the Li symmetric cell composed of 1％BNNFs/PEO/LiTFSI performs good cyclic stability(＞1800 h),and the Li||1％BNNFs/PEO/LiTFSI||LFP full battery shows obviously improved performances in charge-discharge polarization voltage,discharge specific capacity,rate performance and cyclic stability than the Li||PEO/LiTFSI||LFP battery.

Solid-state polymer electrolyteBoron nitride nanofibersLithium metal batteryIonic conductivityLi dendrite

Qianqian Song、Yunting Zhang、Jianli Liang、Si Liu、Jian Zhu、Xingbin Yan

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School of Materials Science and Engineering,Sun Yat-Sen University,Guangzhou 510275,China

College of Physics and Materials Science,Tianjin Normal University,Tianjin 300387,China

Department of Chemistry & Center of Super-Diamond and Advanced Films(COSDAF),City University of Hong Kong,Hong Kong 999077,China

Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology,School of Physics and Optoelectronic Engineering,Foshan University,Foshan 528225,China

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National Key R&D Program of ChinaNational Natural science Foundation of ChinaNational Natural science Foundation of ChinaBasic and Applied Basic Research Foundation of Guangdong ProvinceBasic and Applied Basic Research Foundation of Guangdong ProvinceBasic and Applied Basic Research Foundation of GuangzhouFundamental Research Funds for the Central Universities,Sun Yat-Sen UniversityFundamental Research Funds for the Central Universities,Sun Yat-Sen UniversitySpecial Fund of Science and Technology Innovation Cultivation for College Students in Guangdong Province

2022YFB240260022279166522033462021A15151101682022B151512001920220101132222qntd010122dfx01pdjh2021b0022

2024

10.1016/j.cclet.2023.108797

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(6)
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