金属锂
阳极
材料科学
锂(药物)
沉积(地质)
电解质
电化学
分离器(采油)
原子层沉积
化学工程
纳米技术
集电器
图层(电子)
电极
化学
物理化学
古生物学
内分泌学
工程类
物理
热力学
生物
医学
沉积物
作者
Sangyeop Lee,Sung‐Jin Cho,Hyunbeen Choi,Sungho Kim,Insu Jeong,Yubin Lee,Taesun Choi,Hongyeul Bae,Jin Hong Kim,Soojin Park
出处
期刊:Small
[Wiley]
日期:2024-02-15
卷期号:20 (29)
标识
DOI:10.1002/smll.202311652
摘要
Abstract Modern strides in energy storage underscore the significance of all‐solid‐state batteries (ASSBs) predicated on solid electrolytes and lithium (Li) metal anodes in response to the demand for safer batteries. Nonetheless, ASSBs are often beleaguered by non‐uniform Li deposition during cycling, leading to compromised cell performance from internal short circuits and hindered charge transfer. In this study, the concept of “bottom deposition” is introduced to stabilize metal deposition based on the lithiophilic current collector and a protective layer composed of a polymeric binder and carbon black. The bottom deposition, wherein Li plating ensues between the protective layer and the current collector, circumvents internal short circuits and facilitates uniform volumetric changes of Li. The prepared functional binder for the protective layer presents outstanding mechanical robustness and adhesive properties, which can withstand the volume expansion caused by metal growth. Furthermore, its excellent ion transfer properties promote uniform Li bottom deposition even under a current density of 6 mA·cm −2 . Also, scanning electron microscopy analysis reveals a consistent plating/stripping morphology of Li after cycling. Consequently, the proposed system exhibits enhanced electrochemical performance when assessed within the ASSB framework, operating under a configuration marked by a high Li utilization rate reliant on an ultrathin Li.
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