在全固态电池中激活丰富的Mn基层氧化物的阳离子还氧化,通过调整阴极微结构来调整全固态电池
Yuan Wang1,2, Yue Yu1, Tianwei Cui1
1Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China.
单质丰富的基于的多层氧化物颗粒显著提高了全固态电池的性能. 这一突破通过激活氧氧还原和改善离子扩散来提高能量密度和循环寿命.
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:
- 富含的基于的分层氧化物 (LRMO) 是高能量密度离子电池的关键.
- 由于气体释放和溶解,液态电解质限制了LRMO循环寿命.
- 全固态电池 (ASSB) 提供了一个潜在的解决方案,但需要稳定的接口和高效的离子传输.
研究的目的:
- 研究单体LRMO粒子微观结构对ASSB性能的影响.
- 为了激活离子氧化还原和改善ASSB的LRMO阴极中的离子动力学.
- 展示一种提高ASSB的LRMO能力和循环寿命的战略.
主要方法:
- 使用了没有表面修改的单体LRMO颗粒.
- 在全固态电池架构中制造和测试基于LRMO的阴极.
- 特性电化学性能,重点关注容量和Li+扩散.
主要成果:
- 使用单体LRMO粒子实现了268.4 mAh g-1的高容量.
- 与多晶LRMO相比,显著增强了氧氧还氧激活.
- 观察到改善了阴极-电解质接触和缩短了Li+扩散通路.
结论:
- 单体LRMO粒子设计对于激活ASSB中的阳离子氧化还原是至关重要的.
- 定制阴极微结构为基于LRMO的高性能ASSB提供了可行的途径.
- 这种方法克服了传统LRMO在固态电池应用中的局限性.
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