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Solar and Thermal Multi-Sensing Microfiber Supercapacitor with Intelligent Self-Conditioned Capacitance and Body Temperature Monitoring

Abstract

A solar and thermal multi-sensing all-solid-state microfiber supercapacitor (ASSMFSC) with prominent electrochemical and mechanical performance, reliable environmental responsivity, and intelligent self-conditioned capacitance are constructed by using cellulose nanofibrils-graphene-conjugated polymer, which assemblies as both a core-sheath microfiber electrode (CSMFE) and a sensing unit. Multicomponent hierarchical synergistic design fully exploits of the unique attributes and synergy interaction of each component to endow well-designed CSMFE with highly capacitive and mechanically robust, as well as excellent thermal sensitivity and photothermal conversion function, enabling valid modulation of redox reactions, interface performance, or electronic/ionic transfer in microfiber supercapacitors toward complex external stimulations and building interrelated working responses. The fabricated ASSMFSC presents a total volumetric (vs the whole device) capacitance of 85.8 mF cm-3, excellent cycle stability, and volumetric energy density of 11.9 mWh cm−3. Moreover, ASSMFSC shows delightful solar-thermal conversion capacitance enhancement, at one solar power density (1 kW m-2), the capacitance is two times compare with that of the device in the dark and performs self-regulation capacitance ability with the change of solar intensity. As a thermosensitive device, ASSMFSC with a current sensitivity of 0.47437 ± 0.00549 °C-1 displays a fast response and excellent reproducibility to sense subtle temperature changes. This work demonstrates that CSMFE-driven microfiber supercapacitor can use in photothermal conversion energy storage system and body temperature monitoring, which provides an essential reference and optimistic incentives for new generation energy-related devices.

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Supplementary files

Article information


Submitted
12 Mar 2020
Accepted
19 May 2020
First published
19 May 2020

J. Mater. Chem. A, 2020, Accepted Manuscript
Article type
Paper

Solar and Thermal Multi-Sensing Microfiber Supercapacitor with Intelligent Self-Conditioned Capacitance and Body Temperature Monitoring

Y. Teng, J. Wei, H. Du, M. Mojtaba and D. Li, J. Mater. Chem. A, 2020, Accepted Manuscript , DOI: 10.1039/D0TA02894K

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