Yun Su; Xiaohui Rong; Ang Gao; Yuan Liu; Jianwei Li; Minglei Mao; Xingguo Qi; Guoliang Chai; Qinghua Zhang; Liumin Suo; Lin Gu; Hong Li; Xuejie Huang; Liquan Chen; Binyuan Liu; Yong‐Sheng Hu · 2022 · Nature Communications
Paper
Abstract Poly(ethylene oxide)-based solid-state electrolytes are widely considered promising candidates for the next generation of lithium and sodium metal batteries. However, several challenges, including low oxidation resistance and low cation transference number, hinder poly(ethylene oxide)-based electrolytes for broad applications. To circumvent these issues, here, we propose the design, synthesis and application of a fluoropolymer, i.e., poly(2,2,2-trifluoroethyl methacrylate). This polymer, when introduced into a poly(ethylene oxide)-based solid electrolyte, improves the electrochemical window stability and transference number. Via multiple physicochemical and theoretical characterizations, we identify the presence of tailored supramolecular bonds and peculiar morphological structures as the main factors responsible for the improved electrochemical performances. The polymeric solid electrolyte is also investigated in full lithium and sodium metal lab-scale cells. Interestingly, when tested in a single-layer pouch cell configuration in combination with a Li metal negative electrode and a LiMn 0.6 Fe 0.4 PO 4 -based positive electrode, the polymeric solid-state electrolyte enables 200 cycles at 42 mA·g −1 and 70 °C with a stable discharge capacity of approximately 2.5 mAh when an external pressure of 0.28 MPa is applied.
Analysis
This paper presents a novel fluoropolymer-based solid electrolyte that enhances the performance of lithium and sodium metal batteries by improving oxidation resistance and cation transference number.
Discovery
Thomas Schmaltz; Felix Hartmann; Tim Wicke; Lukas Weymann; Christoph Neef; Jürgen Janek
Junbao Kang; Nanping Deng; Dongjie Shi; Feng Yang; Ziye Wang; Lu Gao; Yunxuan Song; Yixia Zhao; Bowen Cheng; Geng Li; Weimin Kang; Kai Zhang
Yujing Wu; Xu Jing; Pushun Lu; Jiaze Lu; Luyu Gan; Shuo Wang; Ruijuan Xiao; Hong Li; Liquan Chen; Fan Wu
Pushun Lu; Yu Xia; Guochen Sun; Dengxu Wu; Siyuan Wu; Wenlin Yan; Xiang Zhu; Jiaze Lu; Quanhai Niu; Shaochen Shi; Zhengju Sha; Liquan Chen; Hong Li; Fan Wu
Kaiyong Tuo; Chunwen Sun; Shuqin Liu
Yoshiaki Tanaka; Koki Ueno; Keita Mizuno; Kaori Takeuchi; Tetsuya Asano; Akihiro Sakai
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