非石墨类锂离子电池负极材料预锂化进展

Research progress in pre-lithiation of non-graphite anode materials for lithium-ion batteries

  • 摘要: 随着锂离子电池接近传统插层负极材料允许的能量密度上限,碳系负极材料已无法满足当前电动汽车及低空经济的需求,合金型和转换型的非石墨类负极材料凭借更高理论比容量、合适电压平台的优势,逐步引起广泛的关注与研究。然而,合金型和转换型负极材料在脱嵌锂过程中易产生较大的活性锂损失,导致库伦效率的降低以及容量的快速衰减,解决上述问题的有效手段则是对负极材料进行预锂化,现有综述大多对硅基合金型负极材料预锂化进展进行了报道,关于过渡金属氧化物转换型负极材料预锂化进展的介绍鲜有涉及。本文分别从物理预锂化、电化学预锂化和化学预锂化等三个方面,综述了近年来包括转换型负极材料在内的非石墨类锂离子电池负极材料预锂化研究进展,并对未来的预锂化技术发展趋势进行了展望。

     

    Abstract: Lithium-ion batteries (LIBs) have approached the upper limit of the energy density allowed by conventional intercalated anode materials, and carbon-based anode materials can no longer meet the requirements of electric vehicles and low-altitude economics. Alloy-type and transition-type non-graphite anode materials have gradually attracted extensive attention and research due to their advantages in terms of higher theoretical specific capacity and suitable voltage platforms. However, alloy-type and conversion-type anode materials are susceptible to active lithium loss during lithium-ion intercalation/deintercalation, reducing coulomb efficiency and rapid capacity degradation. An effective solution to these problems is the pre-lithiation of the anode material. Most of the existing reviews report the progress of pre-lithiation of silicon-based alloy-type anode materials, and few of them introduce the progress of pre-lithiation of transition metal oxides conversion-type anode materials. The research progress of pre-lithiation of anode materials for non-graphite LIBs in recent years, including the conversion-type anode materials, are reviewed mainly from three aspects:physical, electrochemical and chemical pre-lithiation, with a prospect of the development trend of pre-curing technology.

     

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