Journal
ACS APPLIED NANO MATERIALS
Volume 2, Issue 10, Pages 6428-6435Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.9b01391
Keywords
Al-ion battery; aluminum; titanium(IV) oxide; energy storage; nanorod; synthesis
Funding
- Innosuisse - Swiss Innovation Agency
- National Natural Science Foundation of China [91834301, 21878078]
- French ANR within the Photonorm project [ANR-11-ECOT-0008]
- Agence Nationale de la Recherche (ANR) [ANR-11-ECOT-0008] Funding Source: Agence Nationale de la Recherche (ANR)
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In view of the practical deployment of Al-ion batteries for stationary energy storage, novel and cost-efficient cathodes consisting of earth-abundant chemical elements are imperative. Titanium dioxide TiO2 is an appealing candidate as a cathode material due to high natural reserves of the constituent elements as well as its nontoxicity and high chemical robustness. In this work, we assessed the potential of anatase TiO2 nanorods as a cathode material for Al-ion storage. This material delivers high capacities of 112-165 mAh g(-1) at a current density of 50 mA g(-1) in AlCl3/1-Ethyl-3-methylimidazolium chloride ionic liquid electrolyte of various acidity. The mechanism of aluminum intercalation into anatase TiO2 nanorods and the related crystal structure changes were assessed by density functional theory, ex situ X-ray photoelectron and energy-dispersive X-ray spectroscopies.
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