材料科学
阳极
枝晶(数学)
石墨烯
锂(药物)
成核
纳米技术
金属锂
化学气相沉积
导电体
复合数
化学工程
复合材料
电极
物理化学
内分泌学
有机化学
化学
工程类
医学
数学
几何学
作者
Zhongli Hu,Zhenzhu Li,Xia Zhou,Tao Jiang,Gulian Wang,Jingyu Sun,Pengfei Sun,Chenglin Yan,Li Zhang
标识
DOI:10.1016/j.ensm.2018.12.020
摘要
Lithium (Li) metal has been recognized as an “ultimate” anode material for the next-generation rechargeable batteries. However, the challenges induced by Li dendrites on a working Li anode would cause cell short and expose the Li-metal batteries to wide safety concerns. The design of Li plating hosts that synergize excellent conductivity, unique nano-architecture and superb lithiophilic nature has been proven to be one of the most promising strategies to alleviate the dendrite issue of Li. Nevertheless, current 3-dimensional conductive hosts still need to be further improved to meet the vast Li deposition under high power conditions. Herein, vertical erected graphene nanowall-coated copper foams ([email protected]) prepared via plasma-enhanced chemical vapor deposition are adopted as highly lithiophilic host materials to regulate Li nucleation and suppress dendrite growth. The unique design of the [email protected] host is featured by its flexibility, huge reaction interface and ample lithiophilic sites (topological defects and oxygen-containing groups), which enables a dendrite-free morphology and a high cycling efficiency over 99.0% and excellent cycling stability up to 1875 cycles at a high current density of 5 mA cm−2. The combined advantages of the [email protected] host also guarantee the construction of [email protected]@Li||LiNi0.5Co0.2Mn0.3O2 full cells with enhanced rate capability and prolonged lifespan.
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