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通过清理氧气物种进行接口构造,可实现高性能丰富的多层氧化物阴极

Jiahe Chen¹, Haoran Ma¹, Jiajia Huang¹

¹Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|January 21, 2026

概括

电解质中的双B / P添加剂可以防止富层氧化物 (LRLO) 电池中反应性氧物种的损伤. 这改进了高能量密度离子电池的阴极/电解质接口,提高了稳定性.

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
化学工程是化学工程的重要组成部分.

背景情况:

富层氧化物 (LRLOs) 为离子电池 (LIB) 提供高能量密度.
由于反应性氧物种 (ROS) 的界面不兼容性限制了LRLO的应用.
ROS攻击碳酸盐电解质,导致性能降低.

研究的目的:

为LRLO阴极开发一种改性电解质.
为了减轻ROS引起的接口问题.
提高LIBs的稳定性和能量密度.

主要方法:

修改基于LiPF6的碳酸盐电解质,使用含有双B/P的添加剂.
研究添加剂的吸氧能力.
在现场形成一个强大的阴极/电解质接口 (CEI).
//LRLO和石墨//LRLO电池的电化学性能评估.

主要成果:

修改后的电解质有效地清理ROS.
在LRLO表面形成一个稳定的CEI.
阳离子氧化还原反应 (ARR) 显示了改善的可逆性.
电解质分解和过渡金属溶解被抑制.
在200个周期高质量负载后,Li//LRLO电池保持了94.4%的容量.
一个4.5Ah的石墨//LRLO袋式电池实现了282.5Wh kg-1的能量密度与稳定的循环.

结论:

双B/P添加剂为LRLO阴极接口工程提供了一个可行的策略.
这种方法提高了LIBs的周期稳定性和能量密度.
开发的电解质使高性能LIBs具有长期稳定性.

关键词:

一个强大的CEI片.高能量密度的高能量密度.富含的多层氧化物.核爱的攻击是核爱的攻击.有活性氧物种的反应性氧物种.

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