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Order-disorder structural engineering of vanadium oxide anode: Balancing ionic and electronic dynamic for fast-charging aqueous Li-ion battery
Energy Storage Materials ( IF 20.4 ) Pub Date : 2024-05-10 , DOI: 10.1016/j.ensm.2024.103453
Mengxia Cui , Mingzhuang Liu , Xinghua Li , Weijian Shi , Yang Yu , Jiaxing Li , Yu Liu , Fang Zhang , Wenbo Wang , Xiaowei Li , Changlu Shao , Yichun Liu

Fast-charging aqueous lithium-ion batteries (ALIBs) are considered as promising energy storage devices because of their non-flammability and environmentally friendly characteristics. However, how to balance the ionic and electronic dynamics for fast charging reactions remains a significant challenge under the current research status. Here, the order-disorder structural engineering strategy is adopted to resolve this issue, considering the difference between ion and electron transportation in the crystalline and amorphous phases, respectively. Vanadium oxide anodes were developed with optimized ionic and electronic dynamics by using an organic-inorganic hybrid material as a precursor along with refined regulation on the calcination temperature and time. This facile and large-scale extendable approach harnesses the benefits of the order-disorder structure to optimize Li+ storage efficiency and facilitate the high reversibility of Li-ion during fast charging. Consequently, the order-disorder V2O5-based full cell with LiMn2O4 as a cathode exhibits high specific capacity (262.71 mAh g1, 89.35 % of the theoretical capacity of V2O5), high energy density (166.04 Wh kg−1), fast Li-ion diffusion coefficient (7.34×10−5 cm2 s1) and fast-charging performance (only 6 min achieves 82.84 % of initial state-of-charge capacity). This work explores the ionic and electronic dynamic of ordered-disorder structure and offers new insights into the development of fast-charging metal ion batteries.



中文翻译:

氧化钒负极的有序-无序结构工程:平衡快速充电水系锂离子电池的离子和电子动力学

快速充电水系锂离子电池(ALIB)因其不易燃和环保的特性而被认为是有前途的储能设备。然而,在当前的研究现状下,如何平衡快速充电反应的离子和电子动力学仍然是一个重大挑战。这里,采用有序-无序结构工程策略来解决这个问题,分别考虑晶相和非晶相中离子和电子传输的差异。通过使用有机-无机杂化材料作为前体以及对煅烧温度和时间的精细调节,开发了具有优化离子和电子动力学的氧化钒阳极。这种简便且大规模可扩展的方法利用有序-无序结构的优势来优化Li +存储效率,并促进锂离子在快速充电过程中的高可逆性。因此,以LiMn 2 O 4作为正极的有序无序V 2 O 5基全电池表现出高比容量(262.71 mAh g - 1 ,为V 2 O 5理论容量的89.35% )、高能量密度( 166.04 Wh kg -1)、快速锂离子扩散系数(7.34×10 -5 cm 2 s - 1)和快速充电性能(仅6分钟即可达到初始充电状态容量的82.84%)。这项工作探索了有序无序结构的离子和电子动力学,并为快速充电金属离子电池的开发提供了新的见解。

更新日期:2024-05-10
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