锂离子电池负极材料研究进展

Research progress of anode materials for lithium ion battery

  • 摘要: 锂离子电池(LIB)因其无记忆效应、环境友好且自放电小等各项优异性能得到了相关研究者的重点关注。信息电子产品、电动汽车和智能电网的发展对高能量密度、长循环寿命和低成本的LIB产生了巨大需求。负极作为LIB的重要组成部分之一,其性能对电池整体的各项指标有重要影响,要求负极所应用的材料具有高比容量和优异的循环性能等特性。传统石墨和钛酸锂(Li4Ti5O12)负极由于比容量偏低,越来越难以满足使用要求,多种新型负极材料的研究开发正如火如荼地进行。金属锂具有非常高的理论比容量,但在反应过程中容易形成枝晶,其商业应用受到限制。除石墨外的碳基负极、硅碳负极和过渡金属化合物也具有较高的理论比容量,且相对于金属锂负极而言更安全,有望在不久的将来实现应用。本文综述了当前国内外LIB负极的研究现状,分析了新型LIB负极的优缺点,指出了LIB负极的研究方向,并对前景作出了展望。

     

    Abstract: Lithium-ion batteries (LIBs) have attracted the attention of related researchers because of their excellent performance such as no memory effects, environmental-friendly and small self-discharge. The development of information electronics, electric vehicles and smart grids has created a huge demand for high energy density, long cycle life and low cost LIBs. As one of the important components of LIBs, the performance of anodes has an important impact on the overall indicators of the battery, the material used as anode is required to have high specific capacity and excellent cycling performance and other characteristics. Lithium metal is easy to form dendrites in the reaction process, and its commercial application is limited. The carbon base anode, lithium titanate (Li4Ti5O12) and silicon carbon anode are also difficult to meet the requirements of practical applications, the research of new anode materials has become a new hotspot. In this paper, the research status of anode materials for LIB was reviewed, the advantages and disadvantages of anode materials such as carbon based anode, Li4Ti5O12, silicon carbon anode and new anode material were summarized and analyzed. Besides that, the research direction of anode materials for LIB was pointed out, and the prospect of anode materials was prospected.

     

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