Synthesis and electrochemical performance of flexible cellulose nanofiber-carbon nanotube/natural rubber composite elastomers as supercapacitor electrodes

HAN Jing-quan; LU Kai-yue; YUE Yi-ying; MEI Chang-tong; WANG Hui-xiang; YAN Peng-bin; XU Xin-wu

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Article Navigation > New Carbon Mater. > 2018 > 33(4): 341-350

HAN Jing-quan, LU Kai-yue, YUE Yi-ying, MEI Chang-tong, WANG Hui-xiang, YAN Peng-bin, XU Xin-wu. Synthesis and electrochemical performance of flexible cellulose nanofiber-carbon nanotube/natural rubber composite elastomers as supercapacitor electrodes. New Carbon Mater., 2018, 33(4): 341-350.

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Synthesis and electrochemical performance of flexible cellulose nanofiber-carbon nanotube/natural rubber composite elastomers as supercapacitor electrodes

1.
College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;
2.
College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China

Funds: National Natural Science Foundation of China (31770609);Ninth China Special Postdoctoral Science Foundation (2016T90466);Natural Science Research Project of Jiangsu Province (17KJB220007);333 Project of Jiangsu Province (2016);Qing Lan Project of Jiangsu Province (2016);Key Research and Development Program of Zhe-jiang Province (2017C01117);Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD);Analysis and Test Center of Nanjing Forestry University.

Received Date: 2018-04-03
Accepted Date: 2018-08-30
Rev Recd Date: 2018-07-18
Publish Date: 2018-08-28

Abstract

Abstract

High strength, flexible and conductive composite elastomers for use as supercapacitor electrodes were synthesized using cellulose nanofibers (CNFs) and carbon nanotubes (CNTs) as the fillers, and natural rubber (NR) as the elastomer. An aqueous suspension of CNFs and CNTs was added to a natural rubber aqueous emulsion containing sulfur and a vulcanization accelerator, and the mixture was homogenized at a high-pressure, coprecipitated with a 1 M H₂SO₄ solution and vulcanized to obtain the composite elastomer. The microstructure, mechanical properties, electrical conductivity and electrochemical performance of the CNF-CNT/NR elastomers were investigated. Results showed that CNFs significantly improved the dispersion of CNTs in the aqueous suspension, leading to homogenous composite elastomers. The tensile strength and elastic modulus were significantly improved by adding CNFs. When the contents of CNFs and CNTs were 3 and 10 parts per 100 NR by weight, the tensile strength and elastic modulus of the composite reached maximum values of 6.44±0.32 and 8.77±0.48 MPa, respectively, and it was highly stretchable and flexible with a stable electrical conductivity of 1.78±0.86 S/m after stretching, bending and folding. It had a specific capacitance of 107 F/g at a current density of 0.3 A/g and retained 83% of the initial value at 1.0 A/g after cycling for 1200 times. This novel flexible, stretchable and conductive soft elastomer is useful in flexible electronic devices.
- Cellulose Nanofibrils,
- Natural Rubber,
- Carbon Nanotubes,
- Flexible Conductive Elastomer

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References(36)

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