通过盐添加剂对硫化物电解质进行混合涂层,用于稳定的全固态金属电池
Zhiying He1, Yiwen Liu1, Yuankai Liu1
1Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China.
ACS nano
|September 11, 2025
概括
研究人员开发了一种用于固态电池的新型接口层,可以防止树的生长,并提高稳定性. 这一突破提高了下一代全固态电池 (ASSB) 的安全性和能量密度.
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:
- 全固态电池 (ASSB) 提供了更高的安全性和能量密度.
- 在ASSB中的金属阳极面临着由状物生长和界面不稳定性带来的挑战.
研究的目的:
- 设计一个自发预制的固体电解质介面 (PSEI),以稳定/固体电解质 (SE) 接口.
- 为了抑制树状石的形成,并减轻ASSB中的机械降解.
主要方法:
- 将二二氧化 (LiODFB) 作为添加剂加入到Li5.5PS4.5Cl1.5固体电解质中.
- 由此产生的多功能PSEI (混合有机-无机外层,富含无机的内层) 的表征.
- 对Li-Li对称电池和Li-LiNi0.8Co0.1Mn0.1O2全电池进行电化学测试.
主要成果:
- 该PSEI有效地抑制了树岩的形成,并稳定了Li/SE接口.
- -对称电池实现了2.4 mA cm-2的临界电流密度和超过3500小时的稳定循环.
- 完整电池在310个循环后保持了80%的容量,并以4.5V稳定运行.
结论:
- 开发的PSEI战略成功地整合了电子和机械调制以实现电化学稳定性.
- 这种方法释放了ASSB中的金属阳极的潜力.
- 这些发现为更安全,更高能量密度的固态电池铺平了道路.
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