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Low-strain titanium-based oxide electrodes for electrochemical energy storage devices: design, modification, and application
Materials Today Nano ( IF 8.2 ) Pub Date : 2020-05-19 , DOI: 10.1016/j.mtnano.2020.100085
C.-A. Zhou , Z.J. Yao , X.H. Xia , X.L. Wang , C.D. Gu , J.P. Tu

To meet the growing demand for high-performance electrochemical energy storage devices, various kinds of anodes have been proposed, trying to substitute the traditional carbonous materials. Among them, low-strain Ti-based oxides (LSTBOs), especially Li4Ti5O12 and TiNb2O7, stand out for their remarkable safety and long cycling stability. Promising as they are for the high-power energy storage system, the restricted rate performance thereof owing to their poor electronic conductivity and discontented specific capacities nevertheless hinder their further commercial application. To broaden the utilization fields of LSTBOs electrodes, assorted works on the mechanism and tailing strategies have been extensively boosted to surmount these obstacles. Herein, we have summarized the latest advance and development of LSTBOs materials and application thereof in electrochemical energy storage including lithium-ion batteries, sodium-ion batteries, supercapacitors, and hybrid capacitors. At first, a brief introduction of the properties of LSTBOs is given to help reveal the reasons for existing demerits. Then, the melioration of LSTBOs themselves as well as LSTBOs devices are discussed, followed by the study of improvement mechanism of each strategy. In the end, we highlight the optimizing rules for developing advanced LSTBOs electrodes and hope that these bits of advice can serve as effective guidelines for future researches in realizing high power and high energy density devices.



中文翻译:

用于电化学储能设备的低应变钛基氧化物电极:设计,修改和应用

为了满足对高性能电化学能量存储装置的不断增长的需求,已经提出了各种阳极,试图替代传统的碳质材料。其中,低应变钛基氧化物(LSTBOs),尤其是Li 4 Ti 5 O 12和TiNb 2 O 7,以其卓越的安全性和长期的循环稳定性而脱颖而出。尽管它们对于高功率能量存储系统是有希望的,但是由于其差的电导率和不满的比容量而导致其受限的速率性能仍然阻碍了它们的进一步商业应用。为了拓宽LSTBOs电极的利用领域,已广泛开展了有关机理和拖尾策略的各种工作,以克服这些障碍。在此,我们总结了LSTBOs材料的最新进展和发展及其在电化学能量存储中的应用,包括锂离子电池,钠离子电池,超级电容器和混合电容器。首先,简要介绍了LSTBO的属性,以帮助揭示现有缺点的原因。然后,讨论了LSTBOs本身以及LSTBOs设备的优化方法,然后研究了每种策略的改进机制。最后,我们重点介绍了开发高级LSTBO电极的优化规则,并希望这些建议可以为将来在实现高功率和高能量密度设备方面的研究提供有效的指导。

更新日期:2020-05-19
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