金属锂
锂(药物)
阳极
材料科学
石墨氮化碳
金属
动力学
碳纤维
沉积(地质)
氮化物
化学工程
氮化碳
纳米技术
化学
复合材料
冶金
复合数
电极
催化作用
图层(电子)
物理化学
内分泌学
工程类
生物
古生物学
生物化学
光催化
量子力学
医学
物理
沉积物
作者
Hyojun Lim,Minsu Choi,Haeun Kang,Wonchang Choi
出处
期刊:Energy & environmental materials
日期:2024-10-14
摘要
This study presents a novel Li metal host material with a unique hollow nano‐spherical structure that incorporates Ag nano‐seeds into a graphitic carbon nitride (g‐C 3 N 4 ) shell layer, referred to as g‐C 3 N 4 @Ag hollow spheres. The g‐C 3 N 4 @Ag spheres provide a managed internal site for Li metal encapsulation and promote stable Li plating. The g‐C 3 N 4 spheres are uniformly coated using polydopamine, which has an adhesive nature, to enhance lithium plating/stripping stability. The strategic presence of Ag nano‐seeds eliminates the nucleation barrier, properly directing Li growth within the hollow spheres. This design facilitates highly reversible and consistent lithium deposition, offering a promising direction for the production of high‐performance lithium metal anodes. These well‐designed g‐C 3 N 4 @Ag hollow spheres ensure stable Li plating/stripping kinetics over more than 500 cycles with a high coulombic efficiency of over 97%. Furthermore, a full cell made using LiNi 0.90 Co 0.07 Mn 0.03 O 2 and Li‐g‐C 3 N 4 @Ag host electrodes demonstrated highly competitive performance over 200 cycles, providing a guide for the implementation of this technology in advanced lithium metal batteries.
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