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复合阴极架构工程对全固态电池性能的影响

Pratima Kumari¹, Ajit Kumar², Harshita Lohani¹

¹Electrochemical Energy Storage Laboratory, Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.

ACS applied materials & interfaces

|May 14, 2025

概括

研究人员优化了全固态电池 (ASB) 的复合材料阴极,通过联合燃烧瓦酸 (NVPF) 和超离子导体 (NZSP). 这增强了接口接触和离子通路,提高了电池的性能和寿命.

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:

全固态电池 (AS3Bs) 的性能受到电极/电解质界面接触,离子通路和电荷转移电阻的限制.
优化复合性阴极架构和电极/电解质接口对于AS³BS至关重要.
使用氧化物固体电解质制造复合电极,需要仔细的热处理,以平衡材料接触和离子通路.

研究的目的:

通过改进接口接触和离子透,为AS³Bs开发一个优化的复合阴极.
为了研究共燃二酸盐 (NVPF) 和超离子导体 (NZSP) 对正极性能的影响.
使用聚合物电解质,在复合阴极内增强离子导电性.

主要方法:

在700°C的温度下与NVPF和NZSP一起燃烧,以优化的重量比.
用聚合物电解质 (PEO/NaClO₄) 填充复合阴极中的剩余空隙.
使用优化的复合材料阴极制造和测试完整的电池.

主要成果:

在NVPF和NZSP之间实现了降低的界面电阻和有效的离子透.
创建了一个密集的复合材料阴极结构,可忽略不计的孔隙和3D电子/离子透网络.
在0.1°C下经过500个循环后,具有85%的容量保留和99%的库伦比效率,证明了卓越的长期循环稳定性.
在0.1°C时报告了114mAhg-1的初始放电能力,在1°C时表现出色的速率能力.

结论:

优化的复合材料阴极结构显著提高了阴极活性材料的利用率和电池寿命.
燃烧方法和聚合物电解质填充有效地解决AS³Bs.中的界面和离子通路挑战.
这种方法为开发高性能全固态电池提供了一个有希望的战略.

关键词:

完全固态金属电池的金属电池.协同结是一种共同结.复合性阴极是一种复合性阴极.复合的固体电解质复合物电极/电解质接口研究电池是一种电池.

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