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In-Situ Electrodeposition of Nanostructured Carbon Strengthened Interface for Stabilizing Lithium Metal Anode.

Gongxun LuJianwei NaiHuadong YuanJuncheng WangJianhui ZhengZhijin JuCheng-Bin JinYao WangTiefeng LiuYujing LiuXin-Yong Tao
Published in: ACS nano (2022)
The lithium metal anode (LMA) is regarded as one of the most promising candidates for high-energy Li-ion batteries. However, the naturally formed solid electrolyte interface (SEI) is unsatisfied, which would cause continuous dendrite growth and thus prevent the practical application of the LMA. Herein, a stable electrolytic carbon-based hybrid (ECH) artificial SEI is constructed on the LMA via the in-situ electrodeposition of an electrolyte sovlent at ultrahigh voltage. This nanostructured carbon strengthened SEI exhibits much improved ionic conductivity and mechanical strength, which enables uniform Li + diffusion, stabilizes the interface between the electrolyte and lithium metal, and inhibits Li dendrite breeding and Li pulverization. With the protection of this ECH layer, the symmetrical cells show stable long-term cycling performance over 500 h with an ultrahigh plating capacity of 5 mAh cm -2 at the current density of 5 mA cm -2 . A full cell assembled with a Li[Ni 0.8 Co 0.1 Mn 0.1 ]O 2 or LiFePO 4 cathode exhibits a long-term cycling life and excellent capacity retention.
Keyphrases
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  • solid state
  • high intensity
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  • cell proliferation
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  • pi k akt