Investigation of the reversible intercalation/deintercalation of Al into the novel Li3VO4@C microsphere composite cathode material for aluminum-ion batteries

Jiang, Jiali, Li, He, Huang, Jianxing, Li, Kun, Zeng, Jing, Yang, Yang, Li, Jiaqi, Wang, Yunhui, Wang, Jing and Zhao, Jinbao (2017) Investigation of the reversible intercalation/deintercalation of Al into the novel Li3VO4@C microsphere composite cathode material for aluminum-ion batteries. ACS Applied Materials and Interfaces, 9 (34), 28486-28494. (doi:10.1021/acsami.7b07503).

Abstract

The Li₃VO₄@C microsphere composite was first reported as a novel cathode material for rechargeable aluminum-ion batteries (AIBs), which manifests the initial discharge capacity of 137 mAh g^–1 and remains at 48 mAh g^–1 after 100 cycles with almost 100% Coulombic efficiency. The detailed intercalation mechanism of Al into the orthorhombic Li₃VO₄ is investigated by ex situ X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) of Li₃VO₄@C electrodes and the nuclear magnetic resonance aluminum spectroscopy (27Al NMR) of ionic liquid electrolytes in different discharge/charge states. First-principle calculations are also carried out to investigate the structural change as Al inserts into the framework of Li₃VO₄. It is revealed that the Al/Li₃VO₄@C battery goes through electrochemical dissolution and deposition of metallic aluminum in the anode, as well as the insertion and deinsertion of Al³⁺ cations in the cathode in the meantime. The rechargeable AIBs fabricated in this work are of low cost and high safety, which may make a step forward in the development of novel cathode materials based on the acidic ionic liquid electrolyte system.

This record has no associated files available for download.

Contributors

Author: He Li

Download statistics