Type

Journal Article

Authors

Kafil M. Razeeb
Colm O'Dwyer
David McNulty
Narayanasamy Padmanathan
Han Shao

Subjects

Chemistry

Topics
supercapacitor electrochemical free cm 1 nano current density cobalt phosphate hydrate nickel foam nanomaterial multilayer multilayer structure energy storage device supercapattery

Supercapattery based on binder-free Co3 (PO4)2·8H2O multilayer nano/microflakes on nickel foam (2016)

Abstract A binder-free cobalt phosphate hydrate (Co3(PO4)2·8H2O) multilayer nano/microflake structure is synthesized on nickel foam (NF) via a facile hydrothermal process. Four different concentrations (2.5, 5, 10, and 20 mM) of Co2+ and PO4–3 were used to obtain different mass loading of cobalt phosphate on the nickel foam. The Co3(PO4)2·8H2O modified NF electrode (2.5 mM) shows a maximum specific capacity of 868.3 C g–1 (capacitance of 1578.7 F g–1) at a current density of 5 mA cm–2 and remains as high as 566.3 C g–1 (1029.5 F g–1) at 50 mA cm–2 in 1 M NaOH. A supercapattery assembled using Co3(PO4)2·8H2O/NF as the positive electrode and activated carbon/NF as the negative electrode delivers a gravimetric capacitance of 111.2 F g–1 (volumetric capacitance of 4.44 F cm–3). Furthermore, the device offers a high specific energy of 29.29 Wh kg–1 (energy density of 1.17 mWh cm–3) and a specific power of 4687 W kg–1 (power density of 187.5 mW cm–3).
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Full list of authors on original publication

Kafil M. Razeeb, Colm O'Dwyer, David McNulty, Narayanasamy Padmanathan, Han Shao

Experts in our system

1
Kafil M. Razeeb
University College Cork
Total Publications: 15
 
2
Colm O'Dwyer
University College Cork
Total Publications: 121
 
3
David McNulty
University College Cork
Total Publications: 20
 
4
Narayanasamy Padmanathan
University College Cork
Total Publications: 3