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Phase transition driven tough hydrogel ionic thermoelectric cell with giant thermopower
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Phase transition driven tough hydrogel ionic thermoelectric cell with giant thermopower
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Phase transition driven tough hydrogel ionic thermoelectric cell with giant thermopower
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Journal Article
Phase transition driven tough hydrogel ionic thermoelectric cell with giant thermopower
2025
Overview
The application of quasi-solid ionic thermoelectric (i-TE) cells holds great potential for powering ubiquitous wearable electronics without the need for cables or batteries. However, their practical application is restricted by low thermopower. Herein, a temperature-responsive supramolecular hydrogel, P(N-acryloylsemicarbazide-co-acrylic acid) (PNA), has been developed as a i-TE cell that integrates good mechanical and electrochemical properties. The volume phase transition (VPT) of PNA i-TE cell can generate a substantial ion entropy difference, thereby enhancing both the redox reaction efficiency and ionic thermodiffusion rate. A single PNA i-TE cell can generate a thermopower of 2.04 volts with a temperature difference of 50 K. The Seebeck coefficient (
S
e
), specific output power density (
P
max
/
(
Δ
T
)
2
) and figure of merit (
ZT
) of PNA i-TE cell can reach up to 40.9 mV K
−1
, 35.2 mW m
−2
K
−2
and 1.33 respectively. This ionic hydrogel is promising for the design of high performance polymer based i-TE cells in an environmentally friendly and cost-effective manner.
Quasi-solid ionic thermoelectric cells are promising for wearable electronics, though it is challenging to fabricate devices due to low thermopower. Here the authors report a supramolecular hydrogel to enhance the thermopower for wearable electronics.
