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Title:Beyond surface area : enhanced pseudocapacitive properties of cobalt layered double hydroxide through structural modifications
Authors:ID Siher, Anja (Author)
ID Maver, Ksenija (Author)
ID Luin, Uroš (Author)
ID Pintar, Albin (Author)
ID Arčon, Iztok (Author)
ID Mavrič, Andraž (Author)
Files:URL https://www.sciencedirect.com/science/article/pii/S246802302500433X
 
.pdf 1-s2.0-S246802302500433X-main.pdf (1,48 MB)
MD5: 44FC322E417EDEE2D0A7C2D38591B52D
 
URL https://www.sciencedirect.com/science/article/pii/S246802302500433X
 
Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:Cobalt hydroxide and other first-row transition metal hydroxides have gained significant attention as pseudocapacitor materials due to their rapid and reversible redox processes. Their layered structures facilitate interactions between electrolyte anions and cobalt cation sites within the bulk of the material, enabling higher charge density and extending redox activity beyond the particle surface. By controlled precipitation under hydrothermal conditions, the structure and morphology of cobalt hydroxides can be optimized to enhance electrochemical performance. Challenging conventional assumptions, surface area alone is not the primary factor driving increased pseudocapacitive performance. The hexagonal hydrotalcite-like structure, characterized by lower skeletal density and larger basal plane spacing, outperforms the monoclinic cobalt carbonate hydroxide structure, achieving an order of magnitude higher capacitance. In situ X-ray absorption spectroscopy provides critical insights into the pseudocapacitive behavior, revealing enhanced accessibility of Co2+ sites for electrochemical oxidation. While monoclinic cobalt carbonate hydroxide exhibits minimal changes in the Co2+ oxidation state, indicative of surface-limited redox activity, the hydrotalcite-like cobalt hydroxides show substantial shifts in the Co K-edge position, highlighting oxidation of Co2+ sites throughout the bulk.
Keywords:pseudocapacitors, layered-double hydroxides, cobalt hydroxide, redox processes, in situ x-ray absorption spectroscopy
Publication status:In print
Publication version:Author Accepted Manuscript
Publication date:01.01.2025
Year of publishing:2025
Number of pages:str. 1-30
Numbering:Vol. , [article no.] ǂ106174
PID:20.500.12556/RUNG-9904 New window
COBISS.SI-ID:228947715 New window
ISSN:2468-0230
UDC:53
ISSN on article:2468-0230
DOI:10.1016/j.surfin.2025.106174 New window
NUK URN:URN:SI:UNG:REP:YJXDNV2W
Publication date in RUNG:14.03.2025
Views:481
Downloads:6
Metadata:XML DC-XML DC-RDF
:
SIHER, Anja, MAVER, Ksenija, LUIN, Uroš, PINTAR, Albin, ARČON, Iztok and MAVRIČ, Andraž, 2025, Beyond surface area : enhanced pseudocapacitive properties of cobalt layered double hydroxide through structural modifications. Surfaces and interfaces [online]. 2025. No. 106174, p. 1–30. [Accessed 16 April 2025]. DOI 10.1016/j.surfin.2025.106174. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=9904
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Record is a part of a journal

Title:Surfaces and interfaces
Publisher:Elsevier
ISSN:2468-0230
COBISS.SI-ID:526516249 New window

Document is financed by a project

Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P2-0412
Name:Heterogeni procesi na površinah trdnin za trajnostne tehnologije
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P1-0112
Name:Raziskave atomov, molekul in struktur s fotoni in delci
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P1-0418
Name:Kemija katalizatorjev za čisti zrak
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:J2-50058
Name:Sinergijski učinek disperzije žlahtnih kovin in interakcij med kovino in nosilcem v anionsko izmenjevalnih plastovitih kovinskih hidroksidih za učinkovito katalitsko hidrogeniranje CO2
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:J2-2498
Name:Redukcija ogljikovega dioksida na katalizatorju z izoliranimi atomi za tvorbo spojin z dodano vrednostjo
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:J1-50220
Name:Preoblikovanje tehnologije senzorjev: zasnova robustnih elektrokemičnih (bio)senzorjev z uporabo celične arhitekture
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:J7-4636
Name:Temeljno razumevanje reakcije tvorbe vodika za novo generacijo elektrokatalizatorjev na osnovi niklja v alkalni in kloralkalni elektrolizi

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:05.03.2025

Secondary language

Language:Undetermined
Title:Beyond surface area: enhanced pseudocapacitive properties of cobalt layered double hydroxide through structural modifications


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