Journal
CELLULOSE
Volume 25, Issue 7, Pages 4079-4091Publisher
SPRINGER
DOI: 10.1007/s10570-018-1845-9
Keywords
Flexible electrodes; Polypyrrole; Cotton/PPy/MWCNT; Chemical polymerazation; Flexible supercapacitors
Funding
- National Natural Science Foundation of China [51303022]
- Fundamental Research Funds for the Central Universities [2232015D3-17]
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Flexible electrodes made of cotton textile, polypyrrole (PPy) and multi-walled carbon nanotubes (MWCNT) composites were synthesized via a facile in situ chemical deposition method. This method involves a series of successive steps by immersing the cotton fabric in various MWCNT suspensions; adding monomers and p-toluene sulfonic acid (TsOH) as dopant under ultrasonic condition; and then initiating the polymerization by drop-in the oxidant. The fabricated electrodes exhibited a specific capacitance of 597 F g(-1) with good cycle stability (maintaining 96.8% after 1000 cycles). Symmetric all-solid-state supercapacitors based on cotton/PPy/MWCNT electrodes and poly(vinyl alcohol) (PVA)/H3PO4 gel electrolytes were fabricated and tested. The electrochemical measurements showed that assembled supercapacitors had a specific capacitance of 206.8 F g(-1) at a current density of 1 mA cm(-2). The supercapacitors were flexible enough to bend and twist with constant capacitance performance and exhibit 72% capacitance retention after 400 charge-discharge cycles. [GRAPHICS] .
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