Advanced Wearable Thermocells for Body Heat Harvesting

Liu, Y; Zhang, S; Zhou, Y; Buckingham, MA; Aldous, L; Sherrell, PC; Wallace, GG; Ryder, G; Faisal, S; Officer, DL; Beirne, S; Chen, J

Advanced Wearable Thermocells for Body Heat Harvesting

Liu, Y Zhang, S Zhou, Y Buckingham, MA Aldous, L Sherrell, PC Wallace, GG Ryder, G Faisal, S

Officer, DL Beirne, S Chen, J

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Publisher:: Wiley
Publication Type:: Journal Article
Citation:: Advanced Energy Materials, 2020, 10, (48), pp. 2002539
Issue Date:: 2020-12-01

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Field	Value	Language
dc.contributor.author	Liu, Y
dc.contributor.author	Zhang, S
dc.contributor.author	Zhou, Y
dc.contributor.author	Buckingham, MA
dc.contributor.author	Aldous, L
dc.contributor.author	Sherrell, PC
dc.contributor.author	Wallace, GG
dc.contributor.author	Ryder, G
dc.contributor.author	Faisal, S https://orcid.org/0000-0003-3317-2282
dc.contributor.author	Officer, DL
dc.contributor.author	Beirne, S
dc.contributor.author	Chen, J
dc.date.accessioned	2022-10-30T08:50:55Z
dc.date.available	2022-10-30T08:50:55Z
dc.date.issued	2020-12-01
dc.identifier.citation	Advanced Energy Materials, 2020, 10, (48), pp. 2002539
dc.identifier.issn	1614-6832
dc.identifier.issn	1614-6840
dc.identifier.uri	http://hdl.handle.net/10453/162917
dc.description.abstract	Thermoelectrochemical cells (thermocells) designed for harvesting human body heat can provide constant power output for wearable electronics, supplementing state-of-the-art flexible power storage and conversion solutions. However, a systematic investigation into the optimization of wearable thermocells is lacking, especially with regard to device design, n-type electrolytes, and electrode/electrolyte integration. Here, a n-type gel electrolyte: polyvinyl alcohol-FeCl2/3 with outstanding flexibility and elasticity and exceptional electrolyte/electrode integration into a 3D porous poly(3,4-ethylenedioxythiophene)/polystyrenesulfonate (PEDOT/PSS) electrode, is produced via an in situ chemical crosslinking method. The integrated n-type cell shows excellent seebeck coefficients (0.85 mV K−1) and output current density (1.74 A m−2 K−1) that are comparable with an optimized p-type cell consisting of a carboxymethylcellulose-K3/4Fe(CN)6 electrolyte with a 3D PEDOT/PSS-edge functionalized graphene/carbon nanotube electrode (−1.22 mV K−1 and 1.85 A m−2 K−1). The equivalent performance of the n-type and p-type cells enables the effective series connection of up to 18 pairs of p–n cells that combines to give an output voltage of 0.34 V (∆T = 10 K). This in-series device is fabricated into a proof-of-concept watch strap, which can harvest body heat, charge supercapacitor (up to 470 mF) as well as illuminate a green light emitting diode, demonstrating the practical applications.
dc.language	en
dc.publisher	Wiley
dc.relation.ispartof	Advanced Energy Materials
dc.relation.isbasedon	10.1002/aenm.202002539
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0303 Macromolecular and Materials Chemistry, 0912 Materials Engineering, 0915 Interdisciplinary Engineering
dc.title	Advanced Wearable Thermocells for Body Heat Harvesting
dc.type	Journal Article
utslib.citation.volume	10
utslib.for	0303 Macromolecular and Materials Chemistry
utslib.for	0912 Materials Engineering
utslib.for	0915 Interdisciplinary Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2022-10-30T08:50:53Z
pubs.issue	48
pubs.publication-status	Published
pubs.volume	10
utslib.citation.issue	48

Abstract:

Thermoelectrochemical cells (thermocells) designed for harvesting human body heat can provide constant power output for wearable electronics, supplementing state-of-the-art flexible power storage and conversion solutions. However, a systematic investigation into the optimization of wearable thermocells is lacking, especially with regard to device design, n-type electrolytes, and electrode/electrolyte integration. Here, a n-type gel electrolyte: polyvinyl alcohol-FeCl2/3 with outstanding flexibility and elasticity and exceptional electrolyte/electrode integration into a 3D porous poly(3,4-ethylenedioxythiophene)/polystyrenesulfonate (PEDOT/PSS) electrode, is produced via an in situ chemical crosslinking method. The integrated n-type cell shows excellent seebeck coefficients (0.85 mV K−1) and output current density (1.74 A m−2 K−1) that are comparable with an optimized p-type cell consisting of a carboxymethylcellulose-K3/4Fe(CN)6 electrolyte with a 3D PEDOT/PSS-edge functionalized graphene/carbon nanotube electrode (−1.22 mV K−1 and 1.85 A m−2 K−1). The equivalent performance of the n-type and p-type cells enables the effective series connection of up to 18 pairs of p–n cells that combines to give an output voltage of 0.34 V (∆T = 10 K). This in-series device is fabricated into a proof-of-concept watch strap, which can harvest body heat, charge supercapacitor (up to 470 mF) as well as illuminate a green light emitting diode, demonstrating the practical applications.

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http://hdl.handle.net/10453/162917