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在离子电池中用于高度稳定的SiO阳极的快速自愈结合剂
Manyuan Xu1, Xiujuan Wei1,2, Ziqiao Yan1
1Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
ACS applied materials & interfaces
|October 3, 2024
概括
一种新的聚烯酸和二硫酸盐结合剂增强了离子电池的氧化阳极. 这种自我修复的粘合剂提高了结构完整性和电池性能,使其具有高容量和稳定性.
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
- 电池技术 电池技术
背景情况:
- 基于氧化 (SiO) 的材料为离子电池阳极提供了高的特定容量.
- 在循环过程中显著的体积膨胀限制了SiO阳极的实际应用.
- 高性能粘合剂对于减轻体积膨胀和保持结构完整性至关重要.
研究的目的:
- 为基于SiO的阳极开发一种绿色,水溶液粘合剂,具有自我愈合特性.
- 为了提高离子电池中基于SiO的阳极的循环稳定性和容量保留.
主要方法:
- 制造具有Fe3+-catechol协调键的聚烯酸 (PAA) 和二硫酸盐 (LS) 结合剂.
- 电化学测试SiO@PAA-LS电极和SiO光干NCM622全电池的电化学测试.
- 优化LS内容以提高捆绑器性能.
主要成果:
- 使用0.5%LS的SiO@PAA-LS电极在0.5A g-1.1的450个循环后提供了997.3 mAh g-1的容量.
- 在100个循环后,SiO下载下载NCM622全电池在0.5 A g-1下保持了147.58 mAh g-1,容量保持率为82.72%.
- 铁3+-甲基醇协调键使得快速自我愈合,有效地减轻体积应变.
结论:
- 该PAA-LS粘合剂表现出良好的自我修复能力,并有效地抑制SiO阳极的体积膨胀.
- 开发的粘合剂显著提高了离子电池的电化学性能和循环稳定性.
- 这种绿色粘合剂战略为推进高能量密度电池技术提供了一个有希望的方法.
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