双极-双极相互作用诱导的高功率Ah级无阳极金属电池的密集原始固体-电解质介相
Jiawen Huang1,2, Xingguo An1, Zhongling Cheng1,2
1Institute of Energy Materials Science (IEMS), University of Shanghai for Science and Technology, Shanghai, China.
Nature communications
|September 29, 2025
概括
使用化电解质的新型表面被动化策略增强了无阳极的金属电池. 这种方法提高了寿命和稳定性,即使在高速率和湿度存在等苛刻条件下也是如此.
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:
- 无阳极的金属电池提供高能量密度,但面临着像状物生长和容量衰减这样的挑战.
- 这些问题在高充/放电率和高容量下加剧,限制电池寿命.
研究的目的:
- 为无阳极的金属电池开发表面被动化策略.
- 为了提高这些电池的稳定性和循环寿命,特别是在高速率和高容量的操作下.
主要方法:
- 使用高化电解质在金属阳极上创建密集,无机主导的固体电解质介相 (SEI).
- 研究了由双极-双极相互作用驱动的SEI形成机制.
- 测试了具有高阴极负载和高电流密度的制造无阳极电池的性能.
主要成果:
- 自发形成的SEI有效地抵抗了溶剂分解和水分.
- 在高达8 mA cm-2的电流密度和5 mAh cm-2的面积容量下实现了稳定的涂/剥离.
- 在高阴极负载 (10-15毫克-2厘米) 和高速率 (1-3摄氏度) 的电池中,即使存在水分,也证明了长期稳定性.
结论:
- 表面被动化策略显著提高了无阳极金属电池的性能和寿命.
- 成功制造了快速充电,高能量密度 (150Wh-1kg) 的无阳极袋式电池,周期寿命长 (1°C时700个周期).
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