期刊
ADVANCED SCIENCE
卷 7, 期 19, 页码 -出版社
WILEY
DOI: 10.1002/advs.202001303
关键词
all-solid-state lithium-sulfur batteries; boron nitride; solid polymer electrolytes; uniform lithium deposition
资金
- Advanced Energy Storage Research Programme of Science and Engineering Research Council [1229904044, 1229904045]
- A*STAR (Agency for Science, Technology and Research), Singapore
- Singapore Ministry of Education Academic Research Fund Tier 1 [R-279-000-550-133]
- Accelerated Materials Development for Manufacturing Program at A*STAR via the AME Programmatic Fund by the Agency for Science, Technology and Research [A1898b0043]
- Singapore Ministry of Education Academic Research Fund Tier 2 grant [MOE2018-T2-1-045]
Polymer-based solid-state electrolytes are shown to be highly promising for realizing low-cost, high-capacity, and safe Li batteries. One major challenge for polymer solid-state batteries is the relatively high operating temperature (60-80 degrees C), which means operating such batteries will require significant ramp up time due to heating. On the other hand, as polymer electrolytes are poor thermal conductors, thermal variation across the polymer electrolyte can lead to nonuniformity in ionic conductivity. This can be highly detrimental to lithium deposition and may result in dendrite formation. Here, a polyethylene oxide-based electrolyte with improved thermal responses is developed by incorporating 2D boron nitride (BN) nanoflakes. The results show that the BN additive also enhances ionic and mechanical properties of the electrolyte. More uniform Li stripping/deposition and reversible cathode reactions are achieved, which in turn enable all-solid-state lithium-sulfur cells with superior performances.
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