Composite lithium metal anode by melt infusion of lithium into a 3D conducting scaffold with lithiophilic coating
Composite lithium metal anode by melt infusion of lithium into a 3D conducting scaffold with lithiophilic coating
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DOI：
10.1073/pnas.1518188113
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发表时间：
2016-03-15
影响因子：
11.1
通讯作者：
Cui, Yi
中科院分区：
文献类型：
--
作者：
Liang, Zheng;Lin, Dingchang;Cui, Yi
金属锂电池因其较高的理论容量和最低的负极电位而被认为是最好的储能系统之一。然而，在长期的循环过程中，树枝状的生长和几乎无限大的体积变化往往会导致严重的安全隐患和灾难性的故障。将锂熔体注入到具有亲锂涂层的三维多孔碳基质中，制备了稳定的锂-支架复合电极。锂均匀地包裹在基质表面和3D结构中。所制得的复合电极具有较高的导电表面积和良好的恒流循环稳定性。结果表明，该复合电极循环稳定，镀锂/溶出过电位小(
Lithium metal-based battery is considered one of the best energy storage systems due to its high theoretical capacity and lowest anode potential of all. However, dendritic growth and virtually relative infinity volume change during long-term cycling often lead to severe safety hazards and catastrophic failure. Here, a stable lithium-scaffold composite electrode is developed by lithium melt infusion into a 3D porous carbon matrix with "lithiophilic" coating. Lithium is uniformly entrapped on the matrix surface and in the 3D structure. The resulting composite electrode possesses a high conductive surface area and excellent structural stability upon galvanostatic cycling. We showed stable cycling of this composite electrode with small Li plating/stripping overpotential (