Polymeric Wetting Matrix for a Stable Interface between Solid-state Electrolytes and Li Metal Anode  

作　　者：Haoran Song Shida Xue Shiming Chen Zijian Wang Yongli Song Jiawen Li Zhibo Song Luyi Yang Feng Pan 

机构地区：[1]School of Advanced Materials,Peking University Shenzhen Graduate School,Shenzhen 518055,China

出　　处：《Chinese Journal of Structural Chemistry》2022年第5期48-54,共7页结构化学（英文）

基　　金：financially supported by National Key R&D Program of China(No.2016YFB0700600);Soft Science Research Project of Guangdong Province(No.2017B030301013)。

摘　　要：Succinonitrile(SN)based solid-state electrolytes(SSEs)have potential applications in lithium(Li)batteries due to their ease of preparation and high ionic conductivity at room temperature.Here,a novel SSE consisting of poly(vinylidene fluoride-hexafluoropropy-lene)(PVDF-HFP),poly(methyl methacrylate)(PMMA)and Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3) with SN is fabricated,where PMMA is added to serve as a polymer matrix for better wettability of SN.Due to the addition of PMMA,improved room-temperature ionic conductivity of the SSE is resulted.More importantly,better interfacial contact as well as more stable solid-state electrolyte(SEI)layer between SSE and Li anode can be also obtained.As a result,homogeneous and dendrite-free Li plating can be achieved for over 1000 h in Li symmetric cells.When coupled with LiNi_(0.5)Mn_(0.3)Co_(0.2)O_(2) cathode and Li anode,the proposed SSE delivers excellent cycling stability and rate capability in full-cells.By implementing SSEs with a polymeric wetting agent,this work provides fresh perspectives on stabilizing the interface between SSEs and Li metal anodes.

关 键 词：Li metal Li dendrite poly(methyl methacrylate) SUCCINONITRILE composite solid-state electrolyte 

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]