Influence of the electrolyte conductivity on the critical current density and the breakdown voltage

Hae-Kyun Park; Dong-Hyuk Park; Bum-Jin Chung

doi:10.1016/j.cjche.2023.01.007

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Influence of the electrolyte conductivity on the critical current density and the breakdown voltage

Full Length Article | Updated：2026-01-06

- Influence of the electrolyte conductivity on the critical current density and the breakdown voltage
- Chinese Journal of Chemical Engineering Vol. 59, Issue 7, Pages: 169-175(2023)
- Affiliations：
  
  Department of Nuclear Engineering Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi,do,Korea,17104
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2023.01.007
  CLC：
- Published：2023
- Accepted：
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Hae-Kyun Park, Dong-Hyuk Park, Bum-Jin Chung. Influence of the electrolyte conductivity on the critical current density and the breakdown voltage[J]. Chinese Journal of Chemical Engineering, 2023, 59(7): 169-175.
DOI：

Hae-Kyun Park, Dong-Hyuk Park, Bum-Jin Chung. Influence of the electrolyte conductivity on the critical current density and the breakdown voltage[J]. Chinese Journal of Chemical Engineering, 2023, 59(7): 169-175. DOI： 10.1016/j.cjche.2023.01.007.

摘要

Abstract

The work investigates influence of the electrolyte conductivity on the onset of partial contact glow discharge electrolysis (CGDE) in a water electrolysis. Critical current density (CCD) and breakdown voltage were measured together with

in situ

observation of hydrogen bubble behavior

whose influence has not been focused on. For a fixed current during normal electrolysis

hydrogen coalescence adjacent to cathode surface was invigorated at a lower conductivity. Photographic analyses elucidated the hydrogen coalescence characteristics by quantifying size and population of detached hydrogen bubbles. The CCD increased about 104% within given range of conductivity (11.50-127.48 mS·cm

) due to impaired bubble coalescence

which delays hydrogen film formation on the cathode. Meanwhile

decreasing trend of breakdown voltage was measured with increased conductivity showing maximum drop of 74%. It is concluded that onset of partial CGDE is directly affected by hydrodynamic bubble behaviors

whereas the electrolyte conductivity affects the bubble formation characteristics adjacent to cathode electrode.

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