自支撑碳基负极材料的储钠研究进展

Research progress on freestanding carbon-based anodes for sodium energy storage

  • 摘要: 凭借着钠资源储量丰富和成本优势,钠离子电池在电化学储能领域有望成为锂离子电池的重要补充。作为钠离子电池负极材料,炭及其复合材料可以通过合理的结构设计和组分调控获得优异的储钠性能。随着可穿戴电子器件日益普及,人们对电极提出了更高的性能要求。自支撑电极无需使用电化学惰性的黏结剂和导电添加剂等组分,有利于提升电池体系能量密度。本文总结了近年来钠离子电池用自支撑炭基电极材料的最新研究进展,包括碳纳米纤维、碳纳米管、石墨烯及其复合材料,从基底有无的角度详细综述并讨论了自支撑炭基负极的制备策略及其电化学性能,最后对钠离子电池用自支撑炭基负极材料的未来挑战和发展进行了展望。

     

    Abstract: Sodium-ion batteries (SIBs) have received extensive research interest as an important alternative to lithium-ion batteries in the electrochemical energy storage field by virtue of the abundant reserves and low-cost of sodium. In the past few years, carbon and its composite materials used as anode materials have shown excellent sodium storage properties through structural design and composition regulation. The increasing popularity of wearable electronics has demanded higher requirements for electrode materials. A free-standing electrode is able to eliminate the massive use of electrochemical inactive binders and conductive additives, thereby increasing the overall energy density of the battery system. Research progress on carbon materials such as carbon nanofibers, carbon nanotubes and graphene and their composites (metallic compounds and alloy-type materials) is summarized. The preparation strategies and electrochemical properties of free-standing carbon-based anodes with and without substrates are categorized and reviewed. Finally, proposals are made for future research and developments for free-standing carbon-based anodes for SIBs.

     

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