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Hollandite-type Al-doped VO1.52(OH)(0.77) as a zinc ion insertion host material

Title
Hollandite-type Al-doped VO1.52(OH)(0.77) as a zinc ion insertion host material
Author
선양국
Keywords
VANADIUM-OXIDE; CATHODE; BATTERY; STORAGE; SPINEL; NI
Issue Date
2017-04
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v. 5, no. 18, page. 8367-8375
Abstract
For the first time, we suggest VO1.52(OH)(0.77) and Al-doped VO1.52(OH)(0.77) as possible candidate electrode materials for aqueous zinc-ion batteries (ZIBs). Structural analysis data indicate successful doping of Al into the hollandite VO1.52(OH)(0.77) tunnel structure, as confirmed by Rietveld refinement of the X-ray diffraction data (XRD) and X-ray absorption near edge structure (XANES) spectroscopy data. Al is preferred to replace V3+, such that the resulting average oxidation state of V increases with increasing Al content in V1-xAlxO1.52(OH)(0.77). Electrochemical test results indicate significant improvement in capacity and retention in the Al-doped V1-xAlxO1.52(OH)(0.77) due to the presence of strong Al-O bonds, which stabilizes the crystal structure. This is confirmed from the post-cycled data that show less variation in the lattice parameters. Combining the XRD and XANES data, we suggest that the present V1-xAlxO1.52(OH)(0.77) is activated by the V4+/3+ redox reaction, accompanied by Zn2+ insertion into the tunnel structure upon reduction and Zn2+ extraction upon oxidation.
URI
https://pubs.rsc.org/en/content/articlelanding/2017/TA/C7TA01765K#!divAbstracthttps://repository.hanyang.ac.kr/handle/20.500.11754/113750
ISSN
2050-7488; 2050-7496
DOI
10.1039/c7ta01765k
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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