在现场建造功能定制弹性+导电介层,用于高性能石榴型固态金属电池
Lingchen Wang1,2, Jiawei Pan1,2, Jun Jin1,2
1The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|November 7, 2025
概括
研究人员使用植物酸开发了一种多功能弹性中间层,以改进固态金属电池. 这种中间层增强了离子运输,抑制了树突的生长,提高了电池的性能和稳定性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 固态金属电池 (SSLMBs) 面临金属体积波动,Li+运输和树突增长等挑战,阻碍了商业化.
- 有效的接口工程对于克服SSLMBs中的这些局限性至关重要.
研究的目的:
- 设计和实施多功能弹性中间层,以提高SSLMB的性能和稳定性.
- 调查植物酸 (PA) 在界面修饰中的作用,以改善Li+扩散和树抑制.
主要方法:
- 制造一个多功能弹性中间层,其中包含酸巨分子.
- 介层的机械特性及其对Li+运输的影响.
- 在金属阳极上形成的固体电解质介相 (SEI) 层的分析.
- 用高负载NCM83阴极对对称电池和袋式电池进行电化学测试.
主要成果:
- 植物酸中间层在沉积/剥离过程中有效缓冲体积变化.
- 形成了富含阳离子的溶解和稳定的SEI层 (富含LiF和LixPO4).
- 对称电池实现了4.6mA cm-2的高临界电流密度 (CCD),并在1.0mA cm-2下稳定循环超过500小时.
- 在使用高负荷NCM83阴极的35个循环后,袋式电池显示出3.18 mAh cm-2的放电容量.
结论:
- 开发的弹性间层策略显著改善了Li+运输,并抑制了SSLMBs中的树生长.
- 接口工程方法提高了金属阳极的循环稳定性和临界电流密度.
- 这一战略显示出对高性能SSLMBs的商业化有前途的实际潜力.
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