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Deciphering Solid-State Battery Interface Failure: Plasma-Assisted Bulk-Interface Lithium Diffusion Kinetics Regulation
DOI:10.1002/adfm.202521740.png)
摘要
En 中文
石榴石基固态锂金属电池(SSLMBs)中由初始界面结合不足和负极锂离子扩散受限引起的界面接触失效和空隙演化,是实现SSLMBs实际可行性的关键瓶颈。本文提出一种等离子体辅助双策略,集成射频等离子体磁控溅射(RF-PMS)和介质阻挡放电(DBD)等离子体处理,构建优异的界面结构。具体而言,将DBD等离子体功能化的碳纳米管(D-CNT)掺杂的复合锂负极(CLA)涂覆在RF-PMS合成的AlF3改性的Li6.4La3Zr1.4Ta0.6O12(AF-LLZTO)固态电解质上。设计的LC10|AF-LLZTO界面(LC10:含10 wt.% D-CNT的优化CLA)促进了稳定的锂离子扩散路径,有效缓解了界面接触退化。在脱锂至3.0 mAh cm−2后,该结构保留了85.16%的界面接触完整性——显著优于未改性锂负极仅10.49%的保留率。该结构的增强界面稳定性可通过原位光学显微镜观察直接可视化。对称电池LC10|AF-LLZTO-AF|LC10在0.2 mA cm−2下实现10000 h的稳定循环,显著优于无CLA的Li|AF-LLZTO-AF|Li对称电池(1930 h)和无AlF3的LC10|LLZTO|LC10对称电池(<900 h)。此外,采用LiNi0.8Co0.1Mn0.1O2(NCM811)正极的全电池LC10|AF-LLZTO-IL|NCM811表现出超长循环稳定性,在1 C下达到2000次循环,单次循环容量衰减约为0.0125%。
Keyword:
composite-lithium-anode
dielectric-barrier-discharge
interface engineering
Plasma-magnetron-sputtering
solid-state Li metal battery
期刊
IF:
19
论文数:
3.5W
被引数:
32.1W
机构
引用论文
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