%0 Journal Article
%A Siher, Anja
%A Maver, Ksenija
%A Arcon, Iztok
%A Mavric, Andraz
%T Carbonate Formation during Nickel Hydroxide Precipitation Reduces Pseudocapacitive Performance
%J Chemistry of materials
%V 37
%N 19
%@ 0897-4756
%C Washington, DC
%I American Chemical Society
%M PUBDB-2025-04434
%P 7813 - 7822
%D 2025
%X 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
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1021/acs.chemmater.5c01467
%U https://bib-pubdb1.desy.de/record/639333