在固态电池中复合阳极上的固体电解质间相调节.
Zi-You Wang1,2, Chen-Zi Zhao3, Nan Yao3
1School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.
Angewandte Chemie (International ed. in English)
|October 9, 2024
概括
复合阳极为固态金属电池创建一个稳定的固体电解质介相 (SEI). 这一创新提高了下一代储能设备的循环稳定性和安全性.
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:
- 固态金属电池 (SSLMB) 与传统电池相比,提供了更好的安全性和能量密度.
- 在金属/固体聚合物电解质 (SPE) 接口的固体电解质介面 (SEI) 的不稳定性阻碍了长期循环性能.
研究的目的:
- 调查SEI层在SSLMB中的和复合阳极上的形成和影响.
- 评估使用复合阳极的SSLMB的电化学性能和安全性.
主要方法:
- 阳极 (l-SEI) 和复合阳极 (c-SEI) 的制造和表征.
- 使用固体聚合物电解质组装完整细胞和袋细胞.
- 在高面积容量和安全评估 (卷曲,切割) 的电化学循环测试.
主要成果:
- 复合阳极 (c-SEI) 形成一个均的Li2S丰富的无机SEI和较薄的有机SEI层.
- 强大的SEI层有效地使接口无能化,增强循环稳定性.
- 带有c-SEI阳极的全电池在0.5°C下完成了400个循环,具有2.0 mAh cm−2面积容量.
- 可逆高负载固态袋式电池表现出极高的安全性.
结论:
- 配有量身定制的SEI层的复合阳极对于提高SSLMB的循环稳定性至关重要.
- 开发的c-SEI战略为下一代基于固态聚合物的金属电池提供了一个有希望的途径.
- 增强的接口稳定性是释放高能量密度固态电池的全部潜力的关键.
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