Electrochemical study of TiO2 in aqueous AlCl3 electrolyte via vacuum impregnation for superior high-rate electrode performance

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ID: 115435
2019
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Abstract
This communication elucidates the charge storage mechanism of a TiO2 electrode in 1 mol dm− 3 AlCl3 for use in aqueous-ion batteries. Cyclic voltammetry studies suggest a surface contribution to charge storage and that cycle life can be improved by limiting the potential ≥ − 1.0 V vs SCE. In order to enhance this surface contribution, a simple vacuum impregnation technique was employed to improve electrode-electrolyte contact. This resulted in a significant improvement in the high rate performance of TiO2, where a capacity of 15 mA h g− 1 was maintained at the very high specific current of 40 A g− 1, a decrease of only 25% from when the electrode was cycled at 1 A g− 1. The vacuum impregnation process was also applied to copper-hexacyanoferrate, envisaged as a possible positive electrode, again resulting in significant improvements to high-rate performance. This demonstrates the potential for using this simple technique for improving electrode performance in other aqueous electrolyte battery systems.
Reference Key
holland2019bmcelectrochemical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors A. W. Holland;A. Cruden;A. Zerey;A. Hector;R. G. A. Wills;A. W. Holland;A. Cruden;A. Zerey;A. Hector;R. G. A. Wills;
Journal bmc energy
Year 2019
DOI
doi:10.1186/s42500-019-0010-9
URL
https://link.springer.com/article/10.1186/s42500-019-0010-9/fulltext.html
Keywords
energy policy Heat and Mass Transfer engineering thermodynamics nuclear energy renewable and green energy energy systems economics and management

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