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Anion-regulated solid polymer electrolyte enhances the stable deposition of lithium ion for lithium metal batteries
作者:Chaoqun Niu, Jie Liu, Guangping Chen, Chen Liu, et. al
關鍵字:Lithium metal battery, Dendrite free, Anion-regulation, Solid polymer electrolyte, Flexible batteries
論文來源:期刊
具體來源:Journal of Power Sources 417 (2019) 70–75
發表時間:2019年

The adoption of lithium metal anodes, which are ideal for constructing batteries with high specific energy, is limited by dendrite growth and poor cycle performance. Herein, an anion-regulated solid polymer electrolyte based on in-situ-polymerized poly(ethylene glycol ether acrylate) is prepared for dendrite-free lithium metal batteries. According to the space-charge theory, the growth of lithium dendrites is effectively inhibited by the improved electric field of solid polymer electrolyte on the lithium anode side. And this solid system achieves a lithium transfer number of 0.63, excellent ionic conduction on 2.16 × 10?5 S cm?1 at room temperature), a wide electrochemical stable window (4.8 V vs. Li+/Li) and excellent cycle performance. The flexible batteries (LiFePO4 cathode/solid polymer electrolyte/lithium metal) are assembled to power a light-emitting diode at room temperature. We highlight the anion regulated polymer solid electrolyte, which shows great potential for solid lithium metal batteries and flexible batteries.

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