完全固态电池是为在极寒条件下运行而设计的
Bolong Hong1,2,3, Lei Gao4,5, Changping Li6
1Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China.
Nature communications
|January 3, 2025
概括
这项研究开发了使用无形固态电解质的先进全固态电池 (ASSB),以在极寒条件下提供可靠的性能. 这些电池在非常低的温度下显示出有希望的容量保留.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 传统的离子电池 (LIB) 由于液体电解质而在极寒条件下面临性能限制.
- 全固态电池 (ASSB) 为低温储能应用提供了可行的替代方案.
研究的目的:
- 开发和评估使用无形固态电解质 (SSEs) 的ASSB,以在极寒条件下可靠运行.
- 在零度以下的温度下研究这些ASSB的电化学性能.
主要方法:
- 使用无形SSE (xLi3N-TaCl5) 与LiCoO2阳性和Li-In阴性电极制造ASSB.
- 在不同的电流密度下,在各种低温 (-10°C至-60°C) 下对ASSB的电化学测试.
- 在零度以下的温度下进行长期循环稳定性评估.
主要成果:
- 开发的ASSB在-10°C (183.19 mAh g-1), -30°C (164.8 mAh g-1), -40°C (143.78 mAh g-1),18 mA g-1.1时表现出显著的放电能力.
- 观察到出色的容量保留,在100个循环后在-30°C下保持137.6 mAh g−1,在-60°C下持续运行超过200小时.
- 51.94 mAh g-1 的初始放电容量在 -60°C和 18 mA g-1.1 的温度下实现.
结论:
- 基于xLi3N-TaCl5的无形SSE使ASSB在极端寒冷的环境中具有强大的性能.
- 开发的ASSB显示出对需要在非常低温度下可靠储能应用的巨大潜力.
- 这项研究有助于推进用于具有挑战性的操作条件的电池技术.
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