Cellulose ionic conductor with tunable Seebeck coefficient for low-grade heat harvesting.
Carbohydr Polym
; 292: 119650, 2022 Sep 15.
Article
em En
| MEDLINE
| ID: mdl-35725205
ABSTRACT
Natural polymer-based thermoelectric materials are significant for sustainable development because they can be used to directly harvest heat into electricity while avoiding the utilization of petroleum-based resources. Herein, cellulose ionic conductors were fabricated by using cellulose as the hydrogel matrix and cellulose solvents as the electrolytes. p-type and n-type thermoelectric generators (TEG) based on cellulose ionic conductor were obtained, with Seebeck coefficient of 2.61 and -1.33 mV/K, due to the different interactions between quaternary ammonium cations and cellulose. The cellulose TEG-based supercapacitor showed a high specific capacitance and the ability of charging with thermal energy and powering electronic devices with a maximum power density of 0.42 mW/m2. Moreover, a flexible module-type TE harvester with 10 pairs of p-n legs was assembled for body heat harvesting, delivering a thermovoltage of 0.42 V for a temperature gradient of 13 K, enabling waste/biological heat conversion, temperature monitoring and temperature control.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Celulose
/
Temperatura Alta
Idioma:
En
Revista:
Carbohydr Polym
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
China