Design of Poly(siloxane) Electrolytes with Small Molecule Quinone Cathodes for Long-Cycle Lithium–metal Batteries
Design of Poly(siloxane) Electrolytes with Small Molecule Quinone Cathodes for Long-Cycle Lithium–metal Batteries
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长循环锂金属电池用小分子醌正极聚硅氧烷电解质的设计
DOI:
10.1021/acssuschemeng.2c04273
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发表时间:
2022-11
期刊:
影响因子:
--
通讯作者:
Weiwei Huang
中科院分区:
文献类型:
--
作者:
Xuehan Wang;Xiangyue Kong;Jiawen Wang;Yilin Lin;Huimin Sun;Weiwei Huang
To realize the applicability of organic small molecule quinone as an electrode material in traditional lithium batteries, two problems need to be overcome: the dissolution in electrolytes and the lack of Li. Using solid-state electrolytes instead of the existing liquid electrolytes can solve the above problems. Herein, we design and synthesize a poly(siloxane) electrolyte membrane using the Debus–Radziszewski reaction to get a gel polymer electrolyte (GPE). This GPE delivers an ionic conductivity of 1.8 × 10–4S cm–1, a superior lithium-ion transference number of 0.75, a wide electrochemical stability window of 5.0 V, and a stable lithium deposition/dissolution ability without a significant change of overpotential at 1.0 mA cm–2and 1.0 mAh cm–2. Depending on the design, we choose calix[4]quinone (C4Q) as the cathode in batteries,which is a typical n-type carbonyl-based small organic molecule. The lithium–metal batteries (LMBs) assembled with C4Q and the poly(siloxane) electrolytes show a sustained reversible capacity close to 100 mAh g–1at 5 C and display stability in 1000 long charge–discharge cycles.
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