Publication result detail

Decomposition of a Potassium-Based Supersaturated Zincate Solution in Electrolytes with Reduced Zinc Solubility

SMEJKAL, J.; CHLADIL, L.

Original Title

Decomposition of a Potassium-Based Supersaturated Zincate Solution in Electrolytes with Reduced Zinc Solubility

English Title

Decomposition of a Potassium-Based Supersaturated Zincate Solution in Electrolytes with Reduced Zinc Solubility

Type

Paper in proceedings (conference paper)

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.

English 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,

Key words in English

supersaturated zincate, low solubility electrolyte, decomposition, recrystallization, Ni-Zn, Zinc-Air,

Authors

SMEJKAL, J.; CHLADIL, L.

RIV year

2021

Released

17.11.2020

Book

ECS Transactions

ISBN

1938-5862

Periodical

ECS Transactions

Volume

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"
}