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Investigation of the Reversible Intercalation/Deintercalation of Al into the Novel Li3VO4@C Microsphere Composite Cathode Material for Aluminum-Ion Batteries
journal contribution
posted on 2017-08-03, 00:00 authored by Jiali Jiang, He Li, Jianxing Huang, Kun Li, Jing Zeng, Yang Yang, Jiaqi Li, Yunhui Wang, Jing Wang, Jinbao ZhaoThe
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 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.
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First-principle calculationsAl inserts27 Al NMRLi 3 VO 4XPSresonance aluminum spectroscopyintercalation mechanismnovel cathode materialsX-ray diffractionnovel cathode materialXRDelectrolyte systemaluminum-ion batterieselectrochemical dissolutionNovel Li 3 VO 4C Microsphere Composite Cathode Material100 cyclesdischarge capacityC microsphereAIBC electrodesX-ray photoelectron spectroscopyC batteryAluminum-Ion Batteries
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