期刊
POLYMER
卷 212, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2020.123131
关键词
Thermoelectric; Polypyrrole; PEDOT; PSS; Carbon-based ternary composite
资金
- National Natural Science Foundation of China (NSFC) [51673122, 51973127]
The different impacts of graphene and multi-walled carbon nanotube on polypyrrole have been investigated. Graphene interacts stronger with PEDOT chains, and when at the appropriate ratio, it can exhibit excellent thermoelectric performance.
The different impacts of graphene (GNS) and multi-walled carbon nanotube (MWCNT) on the polypyrrole (PPy)-based composites systems have been investigated. PPy/GNS and PPy/MWCNT binary composites were firstly obtained by in situ polymerization. Then poly(3,4-ethylenedioxythiophene): poly (styrene sulfonate) (PEDOT: PSS) was employed to prepare PEDOT: PSS-PPy/GNS (PGNS) and PEDOT: PSS-PPy/MWCNT (PMWCNT) ternary nanocomposite films. PGNS films exhibit uniform layered structure and possess better crystallinity than PMWCNT composites films. Structural analyses reveal that PPy/GNS interact stronger with PEDOT chains, and PEDOT molecular has greater effect on the pi-pi conjugated structure of PPy/GNS than that of PPy/MWCNT. In particular, when the mass ratio of PPy/GNS to PEDOT: PSS was 70%, PGNS composites show excellent thermoelectric performance with the maximum power factor at room temperature of 82.22 mu W/mK(2), which is among the highest value of PPy/GNS-based composites, and the optimal power factor of 55.28 mu W/mK(2) goes to PMWCNT films when the mass ratio of PPy/MWCNT to PEDOT: PSS was 5%.
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