期刊
JOURNAL OF POWER SOURCES
卷 417, 期 -, 页码 70-75出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2019.02.004
关键词
Lithium metal battery; Dendrite free; Anion-regulation; Solid polymer electrolyte; Flexible batteries
资金
- National Nature Science Foundation of China [21763009, 21404028]
- Hainan Provincial Natural Science Foundation of China [2018CXTD332]
- Hainan Provincial Graduate Innovation Fund [hys2018-60]
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 x 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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