Nature Communications最新发表通过设计混合阳极结构来操纵锂硫电池表面反应?Manipulating surface reactions in lithium–sulphur batteries using hybrid anode structures由于锂硫电池具有较高的理论能量密度等优点而备受关注,从Cui大神的好多牛问就可以看到,但是Cui大神的牛文基本上都是对S进行一系列改进,也就是主要关注阴极。本文设计了一种混合的阳极结构来操纵锂硫电池表面反应,具体而言是在锂电极前加一层 氢氧化 锂修饰的 石墨 这样的人工保护层能有效的减小反应过程中的负面效应,最终达到的容量大于800 mAhg1在循环400次后。在众多阴极材料的研究中,这篇阳极材料的设计有着重要的意义!Lithium–sulphur batteries have high theoretical energy density and potentially low cost, but significant challenges such as severe capacity degradation prevent its widespread adoption. Here we report a new design of lithium–sulphur battery using electrically connected graphite and lithium metal as a hybrid anode to control undesirable surface reactions on lithium. Lithiated graphite placed in front of the lithium metal functions as an artificial, self-regulated solid electrolyte interface layer to actively control the electrochemical reactions and minimize the deleterious side reactions, leading to significant performance improvements. Lithium– sulphur cells incorporating this hybrid anodes deliver capacities of 4800 mAhg1 for 400 cycles at a high rate of 1,737mAg1, with only 11% capacity fade and a Coulombic efficiency 499%. This simple hybrid concept may also provide scientific strategies for protecting metal anodes in other energy-storage devices.QQ截图20140110170240.jpg查看更多1个回答 . 17人已关注