硫化物电解质的增强电化学稳定性与表面修改,用于高性能LiNiO2基全固态电池
Zhiying He1, Wujie Yang1, Yu Shi1
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.
Small (Weinheim an der Bergstrasse, Germany)
|May 24, 2025
概括
固体电解质上的新保护层增强了具有富含正极的全固态电池 (ASSLB). 这一创新提高了高能耗应用的性能和安全性.
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:
- 全固态电池 (ASSLBs) 配有层次的丰富的阴极,如LiNiO2 (LNO),承诺高能量密度和安全性.
- 然而,LNO阴极和固体电解质 (例如LPSC) 之间的界面不稳定性限制了实际应用,导致副作用和负荷传输不良,特别是在高电压下.
研究的目的:
- 在固体电解质上开发一个现场保护层,以克服ASSLB中与丰富的阴极的界面不兼容性.
- 为了实现基于LNO的ASSLB的高性能和稳定的运行.
主要方法:
- 使用一个简单的球磨削策略,在Li5.5PS4.5Cl1.5 (LPSC) 固体电解质上使用Li2SO4.4创建一个现场保护层.
- 修改后的电解质被用于带有LNO阴极的ASSLB.
- 进行了多模式光谱分析,以调查接口特性和Li+运输.
主要成果:
- 设计的保护层有效地减轻了LNO和LPSC之间的界面电化学不稳定性.
- 使用改性电解质的ASSLB在0.2°C和45°C时实现了231.3mAhg-1的记录放电容量.
- 显著的循环稳定性被证明,在4.4V的200个循环和4.6V的140个循环后,保持95%的容量.
结论:
- 可扩展且具有成本效益的球磨法方法成功设计了保护层,提高了接口兼容性.
- 这种接口工程释放了基于LNO的ASSLB在高特异性能源和安全能源存储应用中的潜力.
相关概念视频
Preparation and Reactions of Sulfides
5.2K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
5.2K
Formation of Complex Ions
24.0K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
24.0K


