用于高比容量水系铝离子电池的VO@MXene阴极的构建
Construction of VO@MXene Cathodes toward a High Specific Capacity Aqueous Aluminum-Ion Battery.
作者信息
Yang Xiaohu, Gu Hanqing, Chai Luning, Chen Song, Zhang Wenming, Yang Hui Ying, Li Zhanyu
机构信息
Hebei Key Laboratory of Optic-Electronic Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, China.
Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, 487372, Singapore.
出版信息
Nano Lett. 2024 Jul 17;24(28):8542-8549. doi: 10.1021/acs.nanolett.4c01363. Epub 2024 Jul 8.
Aqueous aluminum-ion batteries (AAIBs) are considered a strong candidate for the new generation of energy storage devices. The lack of suitable cathode materials has been a bottleneck factor hindering the future development of AAIBs. In this work, we design and construct a highly effective cathode with dual morphologies. Two-dimensional (2D) layered MXene materials possessed good conductivity and hydrophilicity, which are used as the substrates to deposit rod-shaped vanadium oxides (VO) to form a three-dimensional (3D) cathode. The cathode design provides a strong boost for the rapid electrochemical activities of rod-shaped VO by embedding/extracting both protons (H) and aluminum-ion (Al). As a result, the VO@MXene cathode based AAIB delivers an ultrahigh initial specific capacity of 626 mAh/g at 0.1 A/g with a stable cycle performance up to 100 cycles. This work is a breakthrough for the development of cathode materials for AAIBs.
水系铝离子电池（AAIBs）被认为是新一代储能设备的有力候选者。缺乏合适的阴极材料一直是阻碍AAIBs未来发展的瓶颈因素。在这项工作中，我们设计并构建了一种具有双重形态的高效阴极。二维（2D）层状MXene材料具有良好的导电性和亲水性，用作沉积棒状钒氧化物（VO）的基底，以形成三维（3D）阴极。这种阴极设计通过嵌入/脱出质子（H）和铝离子（Al），极大地促进了棒状VO的快速电化学活性。结果，基于VO@MXene阴极的AAIB在0.1 A/g电流密度下具有626 mAh/g的超高初始比容量，且在高达100次循环时具有稳定的循环性能。这项工作是AAIBs阴极材料开发的一项突破。
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