具有高的稀土化物电解质,可提高循环稳定性和成本效益
Liang Luo1,2, Anyi Zheng1,2, Yingpeng Yu3
1Rare Earth Functional Materials (Xiong'an) Innovation Center Co., Ltd, Xiong'an 071700, China.
Nano letters
|August 21, 2025
概括
新型高稀土化物固态电解质 (SSEs) 为全固态电池 (ASSB) 提供了经济有效的解决方案. 这些电解质具有较高的离子导电性和卓越的循环稳定性,为实际应用铺平了道路.
科学领域:
- 材料科学
- 电化学
- 固态化学
背景情况:
- 稀土化物固态电解质 (SSEs) 对全固态电池 (ASSB) 具有重要意义.
- 稀土资源的高成本和低循环性能限制了它们的实际应用.
- 开发具有成本效益和稳定的SSE对于推进电池技术至关重要.
研究的目的:
- 设计和合成新型高稀土化物电解质.
- 评估它们在ASSB中的离子导电性,电化学稳定性和循环性能.
- 探索高设计的潜力,以改善稀土化物SSE.
主要方法:
- 两种高稀土电解质的合理设计:Li$_{2.6}${Y,Ho,Er,Tm,Yb) Cl$_{5.6}$ (HEE-1) 和Li$_{2.6}${Y,Ho,Er,Tm,Yb) $_{0.5}$Zr$_{0.5}$Cl$_{6.1}$ (HEE-2).
- 为了节省成本,采用了五种稀土元素.
- 使用开发的电解质制造和测试实验室规模的ASSB.
主要成果:
- 在25°C时,HEE-1和HEE-2具有高的离子导电率,分别为0.52 mS·cm^{-1}$和1.46 mS·cm^{-1}$.
- 具有HEE-1和HEE-2的ASSB具有卓越的高压兼容性和长周期稳定性.
- 在4.5V的200个循环后,容量保持96.2% (HEE-1) 和88.1% (HEE-2);在3C的1000个循环后,HEE-2保持91.4%.
结论:
- 高设计策略有效地提高了稀土化物SSE的性能.
- 这些新型电解质对ASSB具有有前途的成本效益和性能.
- 这些发现表明,通过先进的材料设计,稀土化物SSE的商业潜力得到了改善.
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