Electrical and structural investigations of PVA/CMC/PPy/MWCNTs blended polymer composites for energy storage applications

被引:10
|
作者
El-naggar, A. M. [1 ]
Alsulaymani, Lamya A. [1 ]
Mohamed, Mohamed Bakr [2 ]
Kamal, A. M. [1 ]
Albassam, A. A. [1 ]
Lakshminarayana, G. [3 ]
机构
[1] King Saud Univ, Coll Sci, Phys & Astron Dept, POB 2455, Riyadh 11451, Saudi Arabia
[2] Ain Shams Univ, Fac Sci, Phys Dept, Cairo, Egypt
[3] Hanyang Univ, BK21 FOUR ERICA ACE Ctr, Dept Mech Engn, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea
关键词
PVA/CMC/; PPy/MWCNTs; Temperature dependence dielectric properties; and energy density; Activation energy; IMPEDANCE SPECTROSCOPY; AC CONDUCTIVITY;
D O I
10.1016/j.ceramint.2024.08.269
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
This work aims to form polyvinyl alcohol (PVA)/carboxymethyl cellulose (CMC)/0.1 wt% polypyrrole (PPy)/x wt.% multi-walled carbon nanotubes (MWCNTs) blended polymers using the casting technique to employ in energy storage applications. X-ray diffraction and scanning electron microscopy are used to investigate the structure and morphology of the formed blends. The maximum values of dielectric constant and energy density were obtained at x = 0.05. The dielectric constants are influenced by both the temperature and the concentration of MWCNTs, as well as the existence of PPy in the blended matrix. Blends with x = 0 and 0.2 displayed the small polaron mechanism, blends with x = 0.05 and 0.25 followed the CBH model, whereas the remaining samples demonstrated the OLP mechanism. Z ' reaches its maximum values at x = 0.2 and its lowest values at x = 0.05 in the low and intermediate frequency regions. In the higher frequency range doped blends have the lowest Z ' values as compared with the undoped blend. Samples with x = 0.05, 0.15, and 0.2 exhibit semiconductor properties, whereas the remaining samples display features associated with either insulators or partial conductors. The effect of MWCNTs doping amount and temperature on the ionic conductivity, electric modulus and relaxation time of different blends was studied. Also, the activation energy of every blend was determined using the Arrhenius relation.
引用
收藏
页码:44195 / 44211
页数:17
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