Hydrogen bonds enhanced composite polymer electrolyte for high-voltage cathode of solid-state lithium battery

Wang, Yongtao; Wu, Lingqiao; Lin, Zhiyuan; Tang, Mingxue; Ding, Peipei; Guo, Xianwei; Zhang, Zihe; Liu, Shiqi; Wang, Boya; Yin, Xin; Chen, Zonghai; Amine, Khalil; Yu, Haijun

doi:10.1016/j.nanoen.2022.107105

DOE OSTI · 1879888

Hydrogen bonds enhanced composite polymer electrolyte for high-voltage cathode of solid-state lithium battery

Wang, Yongtao·Wu, Lingqiao·Lin, Zhiyuan·Tang, Mingxue·Ding, Peipei·Guo, Xianwei·Zhang, Zihe·Liu, Shiqi·Wang, Boya·Yin, Xin·Chen, Zonghai·Amine, Khalil·Yu, Haijun

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Abstract

Polymer electrolyte is one of the important components for developing advanced solid-state lithium batteries (SSLBs). However, the narrow electrochemical stability window restricts the practical application with high-voltage cathodes. In this study, a series of composite solid electrolytes (CSEs), possessing both wide electrochemical stability window (up to 5.0 V vs. Li + /Li) and high ionic conductivity (over 1.35×10 -3 S/cm at 25 °C), were reported by integrating SiO 2 nanoparticles into poly(vinyl ethylene carbonate) polymer electrolyte. The enhanced anti-oxidation performances are mainly caused and confirmed by the local intermolecular interactions of hydrogen bonds in CSE. Based on this CSE, the SSLBs with LiCoO 2 cathode present good cycle stability at high voltage, and the capacity retention with 4.5 V cut-off voltage is about 94% after 200 cycles. This work not only proves the importance of intermolecular interactions in CSE, but also provides an effective method for achieving high-energy SSLBs with enhanced interface compatibility between polymer electrolyte and highvoltage cathodes

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25 ENERGY STORAGE composite solid electrolyte electrochemical stability window high-voltage cathode hydrogen bonds solid-state lithium batteries

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Wang, Yongtao, Wu, Lingqiao, Lin, Zhiyuan, Tang, Mingxue, Ding, Peipei, Guo, Xianwei, Zhang, Zihe, Liu, Shiqi, Wang, Boya, Yin, Xin, Chen, Zonghai, Amine, Khalil, Yu, Haijun. 2022-02-28. Hydrogen bonds enhanced composite polymer electrolyte for high-voltage cathode of solid-state lithium battery. https://doi.org/10.1016/j.nanoen.2022.107105

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