School of Metallurgical and Ecological Engineering , University of Science and Technology Beijing , No. 30 College Road , Beijing 100083 , China.
Shenzhen Key Laboratory for Graphene-based Materials and Engineering Laboratory for Functionalized Carbon Materials, Graduate School at Shenzhen , Tsinghua University , Shenzhen 518055 , China.
ACS Appl Mater Interfaces. 2018 Mar 21;10(11):9451-9459. doi: 10.1021/acsami.8b00100. Epub 2018 Mar 6.
In recent years, a rechargeable aluminum-ion battery based on ionic liquid electrolyte is being extensively explored due to three-electron electrochemical reactions, rich resources, and safety. Herein, a rechargeable Al-ion battery composed of MoS microsphere cathode, aluminum anode, and ionic liquid electrolyte has been fabricated for the first time. It can be found that Al intercalates into the MoS during the electrochemical reaction, whereas the storage mechanisms of the electrode material interface and internal are quite different. This result is confirmed by ex situ X-ray photoelectron spectroscopy and X-ray diffraction etching techniques. Meanwhile, this aluminum-ion battery also shows excellent electrochemical performance, such as a discharge specific capacity of 253.6 mA h g at a current density of 20 mA g and a discharge capacity of 66.7 mA h g at a current density of 40 mA g after 100 cycles. This will lay a solid foundation for the commercialization of aluminum-ion batteries.
近年来，由于三电子电化学反应、丰富的资源和安全性，基于离子液体电解质的可充电铝离子电池得到了广泛的研究。本文首次制备了由 MoS 微球阴极、铝阳极和离子液体电解质组成的可充电 Al 离子电池。可以发现，在电化学反应过程中 Al 嵌入到 MoS 中，而电极材料界面和内部的存储机制则大不相同。这一结果通过原位 X 射线光电子能谱和 X 射线衍射刻蚀技术得到了证实。同时，这种铝离子电池还表现出优异的电化学性能，例如在 20 mA g 的电流密度下的放电比容量为 253.6 mA h g，在 40 mA g 的电流密度下经过 100 次循环后的放电容量为 66.7 mA h g。这将为铝离子电池的商业化奠定坚实的基础。
