Rational design of a topological polymeric solid electrolyte for high-performance all-solid-state alkali metal batteries

被引:193
作者
Su, Yun [1 ,2 ,3 ]
Rong, Xiaohui [2 ,3 ,4 ,5 ]
Gao, Ang [2 ,4 ]
Liu, Yuan [2 ,4 ]
Li, Jianwei [6 ]
Mao, Minglei [2 ,5 ]
Qi, Xingguo [2 ]
Chai, Guoliang [6 ]
Zhang, Qinghua [2 ,3 ]
Suo, Liumin [2 ,3 ,4 ,5 ]
Gu, Lin [2 ,4 ]
Li, Hong [2 ,3 ,4 ,5 ]
Huang, Xuejie [2 ,3 ,4 ,5 ]
Chen, Liquan [2 ,3 ,4 ,5 ]
Liu, Binyuan [1 ,7 ]
Hu, Yong-Sheng [2 ,3 ,4 ,5 ]
机构
[1] Hebei Univ Technol, Sch Chem Engn & Technol, Hebei Key Lab Funct Polymer, Tianjin 300130, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[3] Yangtze River Delta Phys Res Ctr Co Ltd, Liyang 213300, Peoples R China
[4] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100190, Peoples R China
[5] Chinese Acad Sci, Inst Phys, Huairou Div, Beijing 101400, Peoples R China
[6] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Peoples R China
[7] Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China
基金
中国博士后科学基金;
关键词
TOTAL-ENERGY CALCULATIONS; ION-TRANSPORT; CONDUCTIVITY; CYCLODEXTRIN;
D O I
10.1038/s41467-022-31792-5
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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 LiMn0.6Fe0.4PO4-based positive electrode, the polymeric solid-state electrolyte enables 200 cycles at 42 mA center dot g(-1) and 70 degrees C with a stable discharge capacity of approximately 2.5 mAh when an external pressure of 0.28 MPa is applied. Solid-state polymer electrolytes are crucial for developing future rechargeable batteries, but they are still limited in performance. Here, the authors designed a topological polymeric solid electrolyte, enabling an all-solid-state high-voltage lithium metal pouch cell to cycle 200 times efficiently.
引用
收藏
页数:15
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