在现场启动的聚合物-1,3-二氧化凝电解质用于高压金属电池
Mingyang Xin1, Yimu Zhang1, Zhenhua Liu1
1School of Chemistry, Northeast Normal University, Changchun 130024, China.
Molecules (Basel, Switzerland)
|June 19, 2024
概括
一种新的凝聚合物电解质 (P-DOL) 能够使高能金属电池在低温下有效运行. 这种P-DOL提供了出色的离子导电性和高压稳定性,对于各种气候的电池应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物化学 聚合物化学
背景情况:
- 开发用于低温操作的高能量密度金属电池需要先进的电解质来解决高压兼容性和高效的离子脱溶.
- 凝聚合物电解质 (GPEs) 结合固体聚合物电解质 (SPE) 和液体电解质 (LE) 的优势正在积极研究中.
研究的目的:
- 为低温,高能金属电池引入一种新的凝聚合物电解质 (P-DOL).
- 在不同温度下评估P-DOL在Li‖LiCoO2和Li‖NCM811电池中的电化学性能和稳定性.
主要方法:
- 通过二二氧化 (LiDFOB) 启动的1,3-二氧化 (DOL) 的聚合合成P-DOL.
- 描述了P-DOL的离子导电性和氧化潜力.
- 在室温下测试Li‖LiCoO2细胞和在-20°C下测试Li‖NCM811细胞.
主要成果:
- 在-20°C下,P-DOL的离子导电率为1.12 × 10−4 S cm−1,氧化电位为4.8 V.
- LiCoO2电池在4.3V时表现出稳定的循环,在50个循环后86.4%的容量保留.
- NCM811电池在-20°C下运行120个周期,容量保持88.4%,归因于强大的富含B和F的阴极接口层 (CEI).
结论:
- 开发的P-DOL在低温下提供高性能金属电池.
- 强大的CEI形成是电解质高压兼容性和稳定性的关键.
- 这项工作为实际的,适用于所有气候的金属电池应用铺平了道路.
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