TY  - JOUR
AU  - Siher, Anja
AU  - Maver, Ksenija
AU  - Arcon, Iztok
AU  - Mavric, Andraz
TI  - Carbonate Formation during Nickel Hydroxide Precipitation Reduces Pseudocapacitive Performance
JO  - Chemistry of materials
VL  - 37
IS  - 19
SN  - 0897-4756
CY  - Washington, DC
PB  - American Chemical Society
M1  - PUBDB-2025-04434
SP  - 7813 - 7822
PY  - 2025
AB  - Nickel hydroxide (Ni(OH)<sub>2</sub>) is a promising pseudocapacitive material owing to its high theoretical capacitance and reversible Ni<sup>2+</sup>/Ni<sup>3+</sup> redox activity. Here we demonstrate that carbonate incorporation during hydrothermal synthesis is the key structural factor limiting its electrochemical performance. Ni(OH)<sub>2</sub> was prepared using hexamethylenetetramine (HMT) and urea at different synthesis temperatures, and carbonate incorporation was quantified by XRD, FTIR, Raman, TGA-MS, and CaCO<sub>3</sub> precipitation. HMT-derived samples at a low temperature (80 °C) formed a turbostratic α-phase with interlayer water, delivering the highest specific capacitance (∼870 F g<sup>−1</sup> at 1 A g<sup>−1</sup>) and excellent cycling stability (92–96
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1021/acs.chemmater.5c01467
UR  - https://bib-pubdb1.desy.de/record/639333
ER  -