期刊
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
卷 127, 期 -, 页码 283-291出版社
ELSEVIER
DOI: 10.1016/j.jtice.2021.07.027
关键词
Hydrothermal; Hydroxyapatite; Filler; Solid-state supercapacitor
资金
- Ministry of Science and Technology (Taiwan) [108-2221-E-006-159-MY3]
- Featured Areas Research Center Program
- Ministry of Education (MOE) in Taiwan
The use of hydroxyapatite induced by carboxylated chitosan as an active filler for pseudo solid-state supercapacitor can effectively reduce crystalline region, increase amorphous region, decrease internal resistance and heat dissipation, enhance segmental motion and ion migration, making it a novel filler for superior solid-state energy storage devices.
Background: The severe crystalline region in pseudo solid-state polymer electrolyte needs to be addressed to improve the poor ionic conductivity performance. Methods: Hydroxyapatite (HA) with rich defect, induced by carboxylated chitosan (CCS) via hydrothermal process is applied to serve as active filler for pseudo solid-state supercapacitor. Significant findings: CCS2 with high degree of carboxylation (DC) of 42.38% is introduced as defect inducing agents to generate CCS2-HA. CCS2-HA possesses small crystallinity index evaluated by FTIR and XRD. More -over, the obvious structural defect of CCS2-HA in [301] orientation was observed from HRTEM. With CCS2-HA as defect-enriched filler, the crystallization temperature decreases from 75 to 65 degrees C. Meanwhile, the acti-vation energy for the ionic conductivity decreases from 2.3 to 1.3 kJ/mol. Meanwhile, the loss tangent peak shifts to higher frequency with smaller intensity in the addition of CCS2-HA as active filler, showing the smaller relaxation time and less heat resistance than the pristine. CCS2-HA possessed rich defects to reduce crystalline region, increase amorphous region, enhance segmental motion, and assist short range ion migra-tion for less internal resistance and heat dissipation as novel filler for superior solid-state energy storage devices. (c) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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