硅基负极材料预锂化技术研究进展

Research progress in pre-lithiation technology for silicon based anode material

从物理预锂、化学反应预锂和电化学预锂等方面,综述硅基负极材料预锂化技术的研究进展。物理预锂包括:与金属锂粉末直接混合法,将气态的金属锂沉积在硅基负极材料或集流体上的真空热蒸发法,将金属锂负载在集流体上的电化学沉积法;化学反应预锂包括:溶液预锂法,将硅制成硅化锂的高能球磨法,将预锂化前驱体生成稳定Li_(x)Si_(y)O_(z)结构的高温处理法;电化学预锂包括:利用自放电机理的锂箔直接接触法、电解锂盐溶液法和短路法等。展望预锂化技术的发展趋势。

The research progress in silicon-based anode materials pre-lithiation technology was reviewed,mainly from the aspects of physical pre-lithiation,chemical reaction pre-lithiation and electrochemical pre-lithiation.The physical pre-lithiation included direct mixing method with lithium metal powder,vacuum thermal evaporation method of depositing gaseous lithium metal on silicon based anode material or collector,electrochemical deposition method of lithium metal loaded on the collector.The chemical reaction pre-lithiation included solution pre-lithiation method,high energy ball milling method for preparation of silicon into lithium silicide,high temperature treatment method of pre-lithiation precursor into stable Li_(x)Si_(y)O_(z) structure.The electrochemical pre-lithiation included direct contact method of lithium foil using self-discharge mechanism,electrolysis of lithium solution method and short circuit method.The development trend of the pre-lithiation technology was prospected.