Title
Morphology modulation of Cu–Co LDH for two-step solvothermal growth of CuCo2S4 as a trifunctional electrode material
Authors
[ 1 ] Wydział Technologii Chemicznej, Politechnika Poznańska | [ SzD ] doctoral school student
Scientific discipline (Law 2.0)
Year of publication
2025
Published in
Article type
scientific article
Publication language
english
Keywords
EN
- LDH
- CTAB
- CuCo2S4
- Supercapacitor
- Water splinting
Abstract
EN In this work, CuCo2S4 with tuned morphology was in-situ synthesized on a nickel foam substrate through a simple two-step solvothermal technique. The role of cetyltrimethylammonium (CTAB) concentration on the microstructural, structural, and electrochemical characteristics was analyzed by various characterization techniques. By adding 1.5 mmol CTAB surfactant, the CuCo layered double hydroxide crystallized with the lamellar/ disc-like morphology which was transformed to a porous-like morphology following sulfurization treatment. The CuCo2S4 electrode had a high specific capacity of 663 Cg− 1 at 1 Ag− 1 , high capacity retention of 91.1 % for 3000 charge/discharge cycles at 20 Ag− 1 , and rate capability of 78 % by increasing the current density from 1 to 10 Ag− 1 . Furthermore, an asymmetric capacitor fabricated employing CuCo2S4 as the positive electrode and activated carbon as the negative electrode delivered a high energy density of 45.5 Wh kg− 1 at a power density of 1399.7 W kg− 1. The fine and porous microstructure of CuCo2S4 exhibited remarkable electrocatalytic activity in alkaline water splitting applications, including low overpotentials of 209 mV for oxygen evolution reaction (OER) and 179 mV for hydrogen evolution reaction (HER).
Date of online publication
19.06.2025
Pages (from - to)
131154-1 - 131154-16
Comments
Article number: 131154
Ministry points / journal
70
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