一个固态电池,能够在180°C的超快充和在-30°C时100%的能量保留
Hu Hong1,2,3, Zhiquan Wei1, Yiqiao Wang1
1Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, China.
概括
本研究介绍了用于固态电池的水合金属有机离子共晶体 (HMIC). 这些先进的材料通过溶剂辅助的离子传输使得快速充电和在极端温度下稳定的运行成为可能.
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
- 固态离子学 固态离子学
背景情况:
- 固态电解质 (SSEs) 对下一代电池至关重要,但在极端条件下面临挑战.
- 当前的SSE通常在苛刻的操作参数下表现出有限的离子导电性和电化学稳定性.
研究的目的:
- 开发一种基于水合金属有机离子共晶体 (HMIC) 的新型固态离子导体.
- 为了实现高效的离子传输和提高固态电池的电化学稳定性,用于极端操作条件.
主要方法:
- 采用了水晶工程策略来调整HMIC结构内的阴离子和水分子的吸附.
- 研究了溶剂辅助的离子运输机制,以促进阴离子跳跃.
- 评估了电化学性能,包括离子导电性和稳定性.
主要成果:
- 优化的HMIC显示出高的Zn2+转移数 (tZn2+=0.81) 和扩大的电化学稳定性窗口 (~2.6V).
- 取得了异常的Zn2+离子导电性 (在25°C时8.6mS cm-1),明显高于水性电解质.
- 普鲁士蓝色模拟电池表现出快速充电能力和稳定的性能从-30到30°C.
结论:
- 具有溶剂辅助跳跃机制的HMIC为在极端条件下运行的固态离子电池提供了有希望的途径.
- 这种方法解决了快速充电,低温性能和高负载应用的关键挑战.
- 开发的HMIC为强大和高性能固态电池技术铺平了道路.
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