Insitu grown metal selenides (MX; M=Ni, Co; X=Se) on carbon fibre cloth as novel electrodes for thermally chargeable supercapacitors
Creators: name: Palanisamy, Rupa Ranjani
name: Narayanasamy, Padmanathan
name: Biswas, Subhajit
name: Holmes, Justin D
name: Kafil, Razeeb M
Publisher: name: Zenodo
Year: 2023
Subjects: energy harvesting
waste heat
waste heat recovery
nanofluidics
electrochemistry
nanochannels
ion intercallation
Seebeck coefficient
thermally chargeable supercapacitors
nanostructure
NiSe electrodes
carbon fibre cloth
heat to electrical energy
charge storage capacity

description: TRANSLATE PhD student Rupa Ranjani Palanisamy presented this work for the Tyndall Poster Presentation Competition/Event on 1st August 2023 at Tyndall National Institute, University College Cork.

ABSTRACT:

Thermally chargeable supercapacitors (TCSs) are a new kind of energy storage device that can convert thermal energy into electricity and store it for further utilisation.  TCSs consist of two major components namely electrodes and electrolyte.  The selection of appropriate electrode materials with rational nanostructured design results in the improved thermoelectrochemical performance of TCSs.  This presentation describes a facile one pot hydrothermal method to synthesise nickel selenide on carbon cloth (NiSe-CC) electrodes for use in TCSs.  The NiSe-CC electrodes produced and electrochemically tested in 1 M NaOH show battery-type charge storage characteristics; with a specific capacity of 33 mAh g-1 (506 F g-1), at a current density of 1 mA cm-2 and with 70 % capacitive retention after 250 stable cycles.  A charge transfer resistance of 2 Ω reveals a high electrical conductivity of the NiSe-CC electrode.  Ongoing experiments are exploring how the structure, morphology and composition of the NiSe-CC electrodes can be optimised in a TCS configuration to best convert heat into electrical energy.  These configurations include the application of nanochannel membranes between the NiSe-CC electrodes, which potentially promotes ion movement between electrodes and enhances their charge storage capacity.

 

KEYWORDS: Heat energy; Supercapacitors; Electrodes; Thermo-Electrochemical Cell.

 

 

Reference

1.     Al-zubaidi, A., Ji, X. and Yu, J., 2017. Thermal charging of supercapacitors: a perspective. Sustainable Energy & Fuels, 1(7), pp.1457-1474.

2.     Lim, H., Shi, Y. and Qiao, Y., 2016. Thermally chargeable supercapacitor working in a homogeneous, changing temperature field. Applied Physics A, 122(4), pp.1-6.

3.     Percy, S., Knight, C., McGarry, S., Post, A., Moore, T. and Cavanagh, K., 2014. Thermal energy harvesting for application at MEMS scale. Springer New York.

4.     Meng, T., Xuan, Y. and Zhang, X., 2021. A thermally chargeable hybrid supercapacitor with high power density for directly converting heat to electricity. ACS Applied Energy Materials, 4(6), pp.6055-6061.
description: TRANSLATE is a €3.4 million EU-funded research project that aims to develop a new nanofluidic platform technology to effectively convert waste heat to electricity. This technology has the potential to improve the energy efficiency of many devices and systems, and provide a radically new zero-emission power source. The TRANSLATE project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement number 964251, for the action of 'The Recycling of waste heat through the Application of Nanofluidic ChannelS: Advances in the Conversion of Thermal to Electrical energy'. More information can be be found on the TRANSLATE project website: https://translate-energy.eu/