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High-performance Flexible Symmetric Supercapacitor Based on Heterostructured PANI@MoS2 Nanocomposite Electrode
Authors:Prof. Dr. Yuandong Xu  Binyang Liu  Chaoyang Dong  Haoyang Feng  Prof. Dr. Yajun Wei  Prof. Dr. Xia Zhang
Affiliation:1. School of Chemistry and Chemical Engineering, Henan University of Technology, 100 Lotus Str., 450001 Zhengzhou, China;2. School of Chemical Engineering, Northwest Minzu University, 1 Northwest New Village, 730030 Lanzhou, China
Abstract:
Three-dimensional (3D) heterostructured molybdenum disulfide (MoS2) is used as base materials for aniline monomer in situ polymerization on its surface. It is found that the aniline addition has a remarkable effect on the energy storage of the final compounds due to the improvement of the conductivity and structure stability combined with the synergistic effect between the two types of species. The optimal compound of PANI@MoS2-150 not only shows a high capacitance value of 801.4 F ⋅ g−1 at a current density of 0.5 A ⋅ g−1 but also provides a high retention rate of 77.4 % after 10,000 cycles. The capacitance fading may be due to the increase of the internal resistance analyzed by EIS. Furthermore, a flexible symmetric supercapacitor based on PANI@MoS2-150 has also been fabricated and the specific capacitance reaches 105 F ⋅ g−1 at a current density of 1 A ⋅ g−1. Impressively, the capacitance retention is larger than 100 % undergoing 10,000 cycles. Besides, the highest energy density of 21 Wh ⋅ kg−1 was obtained. Additionally, the fabricated symmetric supercapacitor demonstrates excellent flexibility.
Keywords:Aniline  Flexible electrode materials  Molybdenum  Polymerization  Symmetric supercapacitors
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