Solid polymer electrolytes based on polysiloxane with anion-trapping boron moieties for all-solid-state lithium metal batteries

被引：17
作者：
Hong, Dong Gi [1 ,2 ]
Baik, Ji-Hoon [3 ]
Kim, Sangwan [1 ,2 ]
Lee, Jong-Chan [1 ,2 ]
机构：
[1] Seoul Natl Univ, Sch Chem & Biol Engn, 1 Gwanak Ro, Seoul 08826, South Korea
[2] Seoul Natl Univ, Inst Chem Proc, 1 Gwanak Ro, Seoul 08826, South Korea
[3] Korea Res Inst Chem Technol, Interface Mat & Chem Engn Res Ctr, 141 Gajeong Ro, Daejeon 34114, South Korea
来源：
POLYMER | 2022年 / 240卷
基金：
新加坡国家研究基金会;
关键词：
Solid polymer electrolytes; Boron; Anion-trapping; Lithium metal batteries; Lithium-ion transference number; ELECTROCHEMICAL PERFORMANCE; INTERFACIAL ENHANCEMENT; COMPOSITE ELECTROLYTES; TRANSFERENCE NUMBER; OXIDE) ELECTROLYTES; IONIC-CONDUCTIVITY; THERMAL-BEHAVIOR; DENDRITE GROWTH; NETWORK; FILLERS;
D O I：
10.1016/j.polymer.2022.124517
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Cross-linked solid polymer electrolytes (SPEs) based on ion-conducting poly(ethylene glycol) (PEG), flexible polysiloxane, and anion-trapping boron cross-linker (BPC) were prepared via thiol-ene click reaction for lithium metal batteries. Various thermal and electrochemical properties of SPEs were systematically investigated by varying the content of BPC. Thermally stable free-standing SPE systems could be obtained due to the cross-linked structure, while relatively high ionic conductivity of about 1.3 x 10(-4) S cm(-1) at 60 C was obtained at the same time by the flexible polysiloxane moiety. The boron moiety in BPC could increase the lithium ion transference number compared to the corresponding boron-free SPE due to the anion-trapping capability of boron atom. The formation and growth of lithium dendrites were effectively suppressed by the anion-trapping capability and mechanically stable cross-linked structure of the SPE.
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页数：9
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