Naslov
Wet chemistry approach for controllable synthesis of NiCo2O4 based supercapacitor active material

Autori
Mandić: Vilko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
International conference MATRIB 2015 / Ćorić, Danko ; Žmak, Irena - Zagreb : Sveučilište Sjever, 2015, 241-254

Skup
International conference MATRIB 2015

Mjesto i datum
Vela Luka, Hrvatska, 25.06.2015. - 27.06.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
NiCo2O4; spinel; nanocrystalline powder; supercapacitor active material

Sažetak
This paper investigates convenient and facile methods for the synthesis of nanocrystalline NiCo2O4 powders for use as supercapacitor active materials. The powders were successfully prepared using several most common solution based synthesis methods like solvothermal and sol gel, additionally assisted with organic- directing agents. Metal nitrates and acetates were used as cation sources, while citric acid, ethylenediaminetetraacetic acid and gelatine were used as organic precursors. Beside the synthesis type, drying, curing and thermal treatment parameters were also optimised. The prepared samples were characterized by simultaneous thermal and thermogravimetric analysis, X-ray diffraction, N2 adsorption/desorption isotherms and scanning electron microscopy. Despite all methods should yield pretty much the same nanopowders with NiCo2O4 composition, products differ significantly. Yet it was found that the most favourable synthesis route proposed in this paper favoured the formation of NiCo2O4 spinel phase at temperature as low as 400 °C. Further upgrade in specific surface was achieved upon combined vacuum degassing and thereafter carbonisation treatment at as low as 500 °C. Preliminary testing of electrochemical performance nominate this material for supercapacitive application.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti

POVEZANOST RADA