A cerium-doped NASICON chemically coupled poly(vinylidene fluoride-hexafluoropropylene)-based polymer electrolyte for high-rate and high-voltage quasi-solid-state lithium metal batteries  

作　　者：Tao Huang Wei Xiong Xue Ye Zhencheng Huang Yuqing Feng Jianneng Liang Shenghua Ye Jishou Piao Xinzhong Wang Yongliang Li Xiangzhong Ren Chao Chen Shaoluan Huang Xiaoping Ouyang Qianling Zhang Jianhong Liu 

机构地区：[1]Graphene Composite Research Center,College of Chemistry and Environmental Engineering.Shenzhen University,Shenzhen 518060,Guangdong,China [2]Institute of information Technology,Shenzhen Institute of Information Technology,Shenzhen 518060.Guangdong,China [3]henzhen Eigen-Equation Graphene Technology Co.Ltd,Shenzhen 518060,Guangdong.China [4]School of Materials Science and Engineering,Xiangtan University,Xiangtan 41105,Hunan,China

出　　处：《Journal of Energy Chemistry》2022年第10期311-321,I0007,共12页能源化学（英文版）

基　　金：the National Key Research and Development Program of China (No. 2020YFC1909604);the Shenzhen Key Projects of Technological Research (JSGG2020092514 5800001)。

摘　　要：The isolated inorganic particles within composite polymer electrolytes(CPEs) are not correlated to the Li^(+)transfer network,resulting in the polymer dominating the low ionic conductivity of CPEs.Therefore,we developed novel quasi-solid-state CPEs of a Ce-doped Na super ion conductors(NASICON)Na_(1.3+x)Al_(0.3)Ce_(x)Ti_(1.7-x)(PO_(4))_(3)(NCATP) chemically coupled poly(vinylidene fluoride-hexafluoropropylene)(PVDF-HFP)/Li-bis(trifluoromethanes-ulfonyl)imide(LiTFSI) matrix.A strong interaction between Ce^(3+)from NCATP and TFSI-anion from the polymer matrix contributes to the fast Li+transportation at the interface.The PVDF-HFP/NCATP CPEs exhibit an ionic conductivity of 2.16 × 0^(-3) S cm^(-1) and a Li^(+) transference number of 0.88.A symmetric Li/Li cell with NCATP-integrated CPEs at 0.1 mA cm^(-2) presents outstanding cycling stability over 2000 h at 25℃.The quasi-solid-state Li metal batteries of Li/CPEs/LiFePO_(4) at 2 C after 400 cycles and Li/CPEs/LiCoO_(2) at 0.2 C after 120 cycles deliver capacities of 100 and 152 mAh g^(-1) at 25℃,respectively.

关 键 词：Quasi-solid-state batteries Composite polymer electrolytes High conductivity High-voltage cathode Oxygen vacancies 

分 类 号：TQ317[化学工程—高聚物工业] TM912[电气工程—电力电子与电力传动]