通过强大的多糖结合网来缓解电压衰变并增强丰富阴极的结构稳定性
Hao Chen1,2, Xirong Mai1,2, Xuqi Lin1,2
1Institute for Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
ACS applied materials & interfaces
|September 23, 2025
概括
一种由瓜尔 (GG) 和桑坦 (XG) 制成的新型复合粘合剂增强了用于离子电池的丰富层次基氧化物 (LRMO). 这种粘合剂提高了稳定性和性能,克服了关键的商业化挑战.
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:
- 富层基氧化物 (LRMO) 是下一代离子电池 (LIB) 的高容量阴极材料.
- 产能色,电压衰变,结构不稳定性和电解质分解阻碍了商业化.
- 从LRMO中过渡金属的溶解进一步加剧了性能退化.
研究的目的:
- 为LRMO阴极开发一个强大的多功能结合网络.
- 解决限制LRMO性能和稳定性的机械和接口挑战.
- 为先进的LIB探索一个可持续的,可用水处理的粘合剂战略.
主要方法:
- 通过使用瓜尔 (GG) 和桑坦 (XG) 聚糖制造了一种复合粘合剂.
- XG-GG粘合剂形成了一个结网络,以增强机械强度和粘合力.
- 结合剂的极性功能组被用来形成保护性阴极电解质介相 (CEI) 并吸附溶解的过渡金属离子.
主要成果:
- 与传统的聚乙烯二化物 (PVDF) 相比,XG-GG粘合剂表现出更高的机械强度和粘合力.
- 使用XG-GG的LRMO阴极表现出增强的电化学性能,包括高初始容量 (266.3 mAh/g) 和更好的容量保留 (84.2%在100个循环后).
- 粘合剂有效地抑制了电极裂,活性物质损失和过渡金属溶解,从而抑制了平均电压衰变.
结论:
- XG-GG复合粘合剂建立了一个强大的多功能网络,可以协同克服LRMO阴极中的机械和接口问题.
- 这种基于水的粘合剂策略提供了一种可持续和有效的方法,用于提高高能LIB的长期稳定性和电化学性能.
- 这些发现为LRMO在下一代储能设备中的实际应用铺平了道路.
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