Preparation and Electrochemical Energy Storage Performances of Carbon Nanotube Network/Polyaniline Composite†

doi:10.7503/cjcu20150579

Abstract

Abstract:

Using the carbon nanotube(CNT) powder and carbon nanotube network(CNTN) as the template, CNT/polyaniline(PANI) and CNTN/PANI composites were prepared via a PANI finite field polymerization method. The morphologies of the obtained samples were characterized by transmission electron microscope and scanning electron microscope. Nitrogen adsorption-desorption analysis was used to study the composites’ pore structure data, and the four-probe conductivity meter was also used to study the samples’ electric conductivity. The electrochemical energy storage performance of the obtained materials was characterized the cyclic voltammograms, galvanostatic charging/discharging curves, cycle life testing and electrochemical impedance spectroscopy. The results show that the obtained CNTN/PANI composite has higher electrochemical capacitance of 143.2 F/g(in organic electrolyte) and better electrical conductivity than the CNT/PANI, indicating that CNTN is more suitable to prepare composite with polymer than CNT powder since the CNTN has outstanding electrical conductivity, mechanical property and electrochemical energy storage property.

Key words: Carbon nanotube, Carbon nanotube network, Finite field polymerization, Composite, Electrochemical energy storage performance

CLC Number:

O641.1

TrendMD:

JIANG Qi, CHEN Jiankang, CHEN Zi, HE Lamei, LU Xiaoying, HU Ailin. Preparation and Electrochemical Energy Storage Performances of Carbon Nanotube Network/Polyaniline Composite^†[J]. Chem. J. Chinese Universities, 2016, 37(1): 73.

Figures/Tables 7

Fig.1 TEM image of CNT(A), SEM image of CNTN(B), CNT/PANI(C) and CNTN/PANI(D)

Fig.2 N2 adsorption-desorption isotherms of CNT/PANI and CNTN/PANI composites(A) and pore size distribution curves calculated by DFT method(B)

Table 1 Data of the specific surface area and pore structure of the CNT/PANI and CNTN/PANI composites*

Sample	S_BET/(m²·g^-1)	V_t/(cm³·g^-1)	Average pore size/nm
CNT/PANI	374.0	0.526	5.62
CNTN/PANI	604.3	0.740	4.90

Fig.3 CV curves of the ESC made from the CNT/PANI(a) and CNTN/PANI(b) composites with a 5 mV/s scanning rate

Fig.4 Galvanostatic charging/discharging curves of the ESC made from the CNT/PANI(a) and CNTN/PANI(b) composites with a 3.4 A/g of current density

Fig.5 Cycle life curves of the ESC made from the CNT/PANI(a) and CNTN/PANI(b) composites

Fig.6 Electrochemical impedance spectroscopy of the ESC made from the CNT/PANI(a) and CNTN/PANI(b) composites

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