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SMEJKAL, J. CHLADIL, L.
Original Title
Decomposition of a Potassium-Based Supersaturated Zincate Solution in Electrolytes with Reduced Zinc Solubility
Type
conference paper
Language
English
Original Abstract
The decomposition rate of supersaturated zincate electrolytes based on 6 mol·dm-3 KOH was measured and the effect of additives used for reducing zincate solubility (KF, K2CO3, K3PO4) was evaluated. The electrolytes were studied after being aged for 5 years at room temperature. Powder morphology was obtained as a result of recrystallization processes were evaluated. Results indicate that the presence of 1 mol·dm-3 PO43- ions reduced the speed of decomposition to less than half. A study of ZnO recrystallization revealed the changes in particle sizes for all additives. Despite the long time of recrystallization processes, ZnO particles grew to different sizes depending on the type of low solubility electrolyte (LSE) used. While the presence of PO43- and F- ions promote the particle growth in all directions and thus influence both particle lengths and widths. The presence of carbonate ions CO32- reduce the particle sizes and thus could contribute to the growth of a larger active area of electrodes after long-term aging.
Keywords
supersaturated zincate, low solubility electrolyte, decomposition, recrystallization, Ni-Zn, Zinc-Air,
Authors
SMEJKAL, J.; CHLADIL, L.
Released
17. 11. 2020
ISBN
1938-5862
Periodical
ECS Transactions
Year of study
99
Number
1
State
United States of America
Pages from
123
Pages to
129
Pages count
7
URL
https://iopscience.iop.org/article/10.1149/09901.0123ecst/pdf
BibTex
@inproceedings{BUT167566, author="Jan {Smejkal} and Ladislav {Chladil}", title="Decomposition of a Potassium-Based Supersaturated Zincate Solution in Electrolytes with Reduced Zinc Solubility", booktitle="ECS Transactions", year="2020", journal="ECS Transactions", volume="99", number="1", pages="123--129", doi="10.1149/09901.0123ecst", issn="1938-5862", url="https://iopscience.iop.org/article/10.1149/09901.0123ecst/pdf" }