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Nana Yao, Yu Zhang, Xianhui Rao, Zhao Yang, Kun Zheng, Konrad Świerczek, and Hailei Zhao, A review on the critical challenges and progress of SiOx-based anodes for lithium-ion batteries, Int. J. Miner. Metall. Mater., 29(2022), No. 4, pp.876-895. https://dx.doi.org/10.1007/s12613-022-2422-7
Nana Yao, Yu Zhang, Xianhui Rao, Zhao Yang, Kun Zheng, Konrad Świerczek, and Hailei Zhao, A review on the critical challenges and progress of SiOx-based anodes for lithium-ion batteries, Int. J. Miner. Metall. Mater., 29(2022), No. 4, pp.876-895. https://dx.doi.org/10.1007/s12613-022-2422-7
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锂离子电池SiOx基负极材料的关键挑战和研究进展

摘要: 硅基材料因为丰富的自然资源、极高的理论比容量和合适的氧化还原电位,近年来受到了全世界研究者的关注。其中,氧化亚硅(SiOxx < 2)在首次嵌锂过程中生成惰性氧化锂和硅酸锂,可以有效缓解体积效应,表现出相对较好的循环稳定性,被认为是极具前景的锂离子电池负极材料之一。但是,一些潜在的问题仍然制约着SiOx的商业化应用,特别是不可逆嵌锂产物导致的容量损失、较差的导电性和巨大的体积效应,使得SiOx的首效、倍率性能以及循环稳定性无法满足实用需求。本文系统总结了SiOx负极材料的研究进展,包括SiOx结构、充放电机理、制备方法、电化学性能,并重点针对SiOx存在的几个基本问题总结了改性措施。此外,文中也讨论了颗粒形貌、成分设计、预锂化、预还原、电解液添加剂以及电极粘结剂等对SiOx电极性能改性的最新进展。文章的最后,我们简略的提出了未来的研究方向和重点,希望这篇文章能够为高能量密度锂离子电池的研发提供帮助。

 

A review on the critical challenges and progress of SiOx-based anodes for lithium-ion batteries

Abstract: With the advantages of abundant resources, high specific capacity, and relatively stable cycling performance, silicon suboxides (SiOx, x < 2) have been recently suggested as promising anodes for next-generation lithium-ion batteries (LIBs). SiOx exhibits superior storage capability because of the presence of silicon and smaller volume change upon charge/discharge than Si owing to the buffering effect of the initial lithiation products of inert lithium oxide and lithium silicates, enabling a stable cycle life of electrodes. However, significant improvements, such as overcoming issues related to volume changes in cycling and initial irreversible capacity loss and enhancing the ionic and electronic charge transport in poorly conducting SiOx electrodes, are still needed to achieve the satisfactory performance required for commercial applications. This review summarizes recent progress on the cycling performance and initial coulombic efficiency of SiOx. Advances in the design of particle morphology and composite composition, prelithiation and prereduction methods, and usage of electrolyte additives and optimized electrode binders are discussed. Perspectives on the promising research directions that might lead to further improvement of the electrochemical properties of SiOx-based anodes are noted. This paper can serve as a basis for the research and development of high-energy-density LIBs.

 

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