一步式阳极锂补充

Lithium-ion battery lithium replenishment technology is an important means of improving battery energy density. In the first charging process of lithium-ion battery, the organic electrolyte will be reduced and decomposed on the surface of anode such as graphite, forming a solid electrolyte phase interface (SEI) film, which will permanently consume a large amount of lithium from the anode, resulting in the low Coulombic efficiency (ICE) of the first cycle, which reduces the capacity and energy density of lithium-ion battery. In addition, there are processes such as deactivation of anode material particles due to detachment and non-reversible deposition of lithium metal, all of which will consume active lithium from the anode, reducing the capacity and energy density of the battery.
Lithiation technology includes negative electrode lithium replenishment and positive electrode lithium replenishment. Negative electrode lithium supplementation is the introduction of active lithium into the negative electrode to compensate for the capacity loss caused by SEI growth. The main methods of negative electrode lithium replenishment include physical mixing, vacuum winding lithium plating, chemical lithiation, self-discharge mechanism lithiation and electrochemical lithiation.
纳狮利用真空镀膜和自动化设计，采用卷对卷循环方式，实现铜箔一步镀锂，镀锂均匀性好，附着力强，可确保后续电池使用过程中的稳定性和优异的循环性能。

消费电子、电动汽车和智能电网的快速发展，对目前的电化学储能系统提出了更高的性能要求。由于电极匹配、液态电解质组成和电池结构等方面的限制，传统的锂离子电池难以同时提高安全性和能量密度，在一定程度上制约了上述领域的发展。得益于固体电解质的高化学和电化学稳定性、高热稳定性和高机械强度，全固态锂电池有望实现高能正极与锂金属负极的匹配，兼顾高能量密度和高安全性，成为新型电化学储能器件的热点研究方向。

Solid-state lithium battery R&D progress #

目前，全固态锂电池的锂沉积部位和形貌不易控制，纯锂金属电极存在较大的体积变形，尚未得到改善。纳狮采用真空一步法制备复合锂电极，构建高致密化、高机械强度的镀锂层，高速、高效地助力固态锂电池的研发进程。

Preparation and structural characterization #

Lithium metal anode #

Multi-stage structured lithium-metal composite anode shows outstanding electrochemical performance with higher specific capacity in all-solid-state lithium-metal battery applications. It shows long-term cycling stability at a capacity retention value of 90%.