材料科学
法拉第效率
电解质
阳极
过电位
金属锂
成核
锂(药物)
化学工程
极化(电化学)
集电器
电极
电化学
内分泌学
物理化学
有机化学
化学
工程类
医学
作者
Chen Guo,Yaqing Guo,Runming Tao,Xiaobin Liao,Kang Du,Huan Zhang,Wang Zhang,Jiyuan Liang,Deyu Wang,Xiaoguang Sun,Shih‐Yuan Lu
出处
期刊:Nano Energy
[Elsevier]
日期:2022-06-01
卷期号:96: 107121-107121
被引量:52
标识
DOI:10.1016/j.nanoen.2022.107121
摘要
Uniform lithium plating/stripping during charging/discharging in 3D lithiophilic current collectors (3DLCC) is essential to suppress growth of lithium dendrites and to mitigate infinite volume variations of lithium metal for long-lived lithium metal batteries. This study reveals the decisive role played by uniformity of the lithiophilic layer of the 3DLCC in achieving uniform lithium plating/stripping. Herein, a series of metal oxide-based 3DLCCs are successfully fabricated with a simple and an ultrafast solution combustion method, from which formation of a uniform and stable lithium dendrite-free solid electrolyte interphase via a uniform lithiophilic layer is demonstrated. Taking Co3O4 as the lithiophilic material deposited on a nickel foam as the 3DLCC (Co@NF) for a proof of concept, the loading amount of Co3O4, closely correlated with the uniformity of the Co3O4 layer, is modulated to optimize its lithium ion hosting performances. With a uniform Co3O4 layer grown in the 3DLCC, an ultralow nucleation overpotential of 33.4 mV is achieved in half-cell tests at 1 mA cm−2 and 1 mAh cm−2, and a high Coulombic efficiency of 97.1% is maintained after 210 cycles under a severe cycling condition of 2 mA cm−2 and 1 mAh cm−2. A small polarization voltage of 13 mV together with an ultralong cycle life of 2400 h at 0.5 mA cm−2 and 1 mAh cm−2 in symmetric Li cells is achieved. Moreover, the composite Li anode delivers sensational rate capability and cyclability in full-cells. This work not only provides new and valuable insights into the interphasial chemistry of solid electrolyte interphase layers, but also sheds light on the development of ultrastable lithium metal batteries.
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