锂离子电池硅基负极研究进展

A Review of Silicon-Based Anode Applied in Lithium-Ion Batteries

  • 摘要: 锂离子电池因其高能量密度的优点在能源领域发展迅速. 硅基负极由于其高理论比容量被视为是继石墨之后最具发展前景的负极材料,但是硅基负极在嵌脱锂过程中会发生严重的体积膨胀,导致电池容量的衰减和库伦效率的下降,影响了其商业化应用. 本文综述了硅基负极的工作原理以及面临的问题挑战,重点从硅基负极的结构设计与改性、粘结剂的开发以及电解液添加剂三个方面对硅基负极进行了系统的阐释,并对其今后的发展趋势进行展望.

     

    Abstract: Lithium-ion batteries have developed rapidly in the energy field because of their high energy density. Silicon-based anode is considered to be the most promising anode material after graphite because of its high theoretical specific capacity. But volume expansion will cause capacity decay and coulombic efficiency reduction, limiting its commercial application. In this paper, the working principle and existing problems and challenges of silicon-based anode were described. The emphasis was on the systematic explanation of the silicon-based anode from three aspects: the structure design and modification, the development of binder and the electrolyte additive, and the development trend of the silicon-based negative electrode in the future is prospected.

     

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