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.