李苗苗, 袁萌伟, 郑幸子, 孙根班, 李会峰. Ti3C2Tx MXene基材料在锂空气电池正极中的研究进展[J]. 北京师范大学学报(自然科学版), 2023, 59(3): 401-412. DOI: 10.12202/j.0476-0301.2022356
引用本文: 李苗苗, 袁萌伟, 郑幸子, 孙根班, 李会峰. Ti3C2Tx MXene基材料在锂空气电池正极中的研究进展[J]. 北京师范大学学报(自然科学版), 2023, 59(3): 401-412. DOI: 10.12202/j.0476-0301.2022356
LI Miaomiao, YUAN Mengwei, ZHENG Xingzi, SUN Genban, LI Huifeng. Ti3C2Tx MXene based materials in lithium-air battery cathode: a progress review[J]. Journal of Beijing Normal University(Natural Science), 2023, 59(3): 401-412. DOI: 10.12202/j.0476-0301.2022356
Citation: LI Miaomiao, YUAN Mengwei, ZHENG Xingzi, SUN Genban, LI Huifeng. Ti3C2Tx MXene based materials in lithium-air battery cathode: a progress review[J]. Journal of Beijing Normal University(Natural Science), 2023, 59(3): 401-412. DOI: 10.12202/j.0476-0301.2022356

Ti3C2Tx MXene基材料在锂空气电池正极中的研究进展

Ti3C2Tx MXene based materials in lithium-air battery cathode: a progress review

  • 摘要: 锂空气电池具有3500 W·h·kg−1的理论能量密度,是极具发展潜力的新一代能源存储系统.在有机相锂空电池中,放电产物为固态Li2O2,具有绝缘性,导致正极反应动力学缓慢,造成反应过电位高、倍率性能差、循环稳定性有限且能量效率低等后果.催化剂可以改善氧还原反应(oxygen reduction reaction, ORR)和氧析出反应(oxygen evolution reaction, OER)动力学,提升各项性能参数,因此开发稳定且高活性的正极催化剂是改善锂空电池性能的关键.Ti3C2Tx MXene是2011年被发现的二维层状钛碳/氮化物纳米材料,导电性高且表面可调,具有催化ORR和OER反应的双重功能,近年来受到广泛关注,在锂空电池中具有良好的应用前景.本文介绍了锂空电池的反应机制,总结了近几年Ti3C2Tx MXene基材料在锂空电池正极催化剂中的研究进展,探讨了锂空电池中Ti3C2Tx MXene基正极催化剂材料的反应机制与性能提升策略,并对此方向未来的发展作一展望.

     

    Abstract: Lithium-air battery (LAB) has a theoretical energy density of 3500 W·h·kg−1, therefore is considered a potential next-generation energy storage system.The discharge product of the cathode in non-water LAB is solid-state Li2O2, which is insulative and leads to slow reaction kinetics, resulting in high reaction overpotential, poor rate performance, limited cycling stability and low energy efficiency.Catalysts can improve the kinetically slow rates of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).The development of stable catalysts with high catalytic activity is a key to improve LAB performance.Ti3C2Tx MXene is a two-dimensional layered titanium carbon/nitride nanomaterial discovered in 2011 with dual function catalytic activity in the ORR and OER, which has received widespread attention in recent years as typical high-efficiency catalyst with promising application in LAB.In this paper we discuss the reaction mechanism of LAB, summarize research progress of Ti3C2Tx MXene based materials in LAB in recent years.We discuss the reaction mechanism and performance improvement strategy of Ti3C2Tx MXene based cathode catalyst materials in LAB, and finally provide some perspectives for future developments in this direction.

     

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