The development of lithium–sulfur batteries necessitates a thorough understanding of the lithium‐deposition process. A novel full‐cell configuration comprising an Li₂S cathode and a bare copper foil on the anode side is presented here. The absence of excess lithium allows for the realization of a truly lithium‐limited Li–S battery, which operates by reversible plating and stripping of lithium on the hostless‐anode substrate (copper foil). Its performance is closely tied to the efficiency of lithium deposition, generating valuable insights on the role and dynamic behavior of lithium anode. The Li₂S full cell shows reasonable capacity retention with a Coulombic efficiency of 96% over 100 cycles, which is a tremendous improvement over that of a similar lithium‐plating‐based full cell with LiFePO₄ cathodes. The exceptional robustness of the Li₂S system is attributed to an intrinsic stabilization of the lithium‐deposition process, which is mediated by polysulfide intermediates that form protective Li₂S and Li₂S₂ regions on the deposited lithium. Combined with the large improvements in energy density and safety by the elimination of a metallic lithium anode, the stability and electrochemical performance of the lithium‐plating‐based Li₂S full cell establish it as an important trajectory for Li–S battery research, focusing on practical realization of reversible lithium anodes.

中文翻译：

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基于可逆锂沉积的锂硫电池，该沉积是从Li2S阴极主体到无宿主阳极衬底上的

锂硫电池的发展需要对锂沉积过程有透彻的了解。本文介绍了一种新颖的全电池配置，包括一个Li ₂ S阴极和一个阳极侧的裸铜箔。没有过量的锂，就可以实现真正的锂受限的Li-S电池，该电池通过在无基质阳极基材（铜箔）上可逆镀覆和剥离锂来工作。它的性能与锂沉积的效率紧密相关，从而对锂阳极的作用和动态行为产生了宝贵的见解。李₂S满电池在100个循环中显示出合理的容量保持率，库仑效率为96％，这与具有LiFePO ₄阴极的类似基于锂电镀的满电池相比，是一个巨大的进步。Li ₂ S系统的出色耐用性归因于锂沉积过程的固有稳定性，这是由多硫化物中间体介导的，该中间体在沉积的锂上形成保护性的Li ₂ S和Li ₂ S ₂区域。消除了金属锂阳极，从而大大提高了能量密度和安全性，并实现了基于锂的Li ₂的稳定性和电化学性能完整电池将其确立为Li-S电池研究的重要轨迹，重点是可逆锂阳极的实际实现。