材料科学
阳极
阴极
电解质
复合材料
聚合物
图层(电子)
相间
锂(药物)
枝晶(数学)
韧性
电镀(地质)
金属锂
电极
地质学
内分泌学
物理化学
生物
化学
医学
遗传学
数学
地球物理学
几何学
作者
Ruimin Gao,Hua Yang,Caoyu Wang,Huan Ye,Fuyang Cao,Zaiping Guo
标识
DOI:10.1002/anie.202111199
摘要
The plating/stripping of Li dendrites can fracture the static solid electrolyte interphase (SEI) and cause significant dynamic volume variations in the Li anode, which give rise to poor cyclability and severe safety hazards. Herein, a tough polymer with a slide-ring structure was designed as a self-adaptive interfacial layer for Li anodes. The slide-ring polymer with a dynamically crosslinked network moves freely while maintaining its toughness and fracture resistance, which allows it can to dissipate the tension induced by Li dendrites on the interphase layer. Moreover, the slide-ring polymer is highly stretchable, elastic, and displays an ultrafast self-healing ability, which allows even pulverized Li to remain coalesced without disintegrating upon consecutive cycling. The Li anodes demonstrate greatly improved suppression of Li dendrite formation, as evidenced by the high critical current density (6 mA cm-2 ) and stable cycling for the full cells with high-areal capacity LiFePO4 , high-voltage NCM, and S cathodes.
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