Carbon Nanotubes/MnO2 Composite Fabricated via Laser Welding and Electrodeposition as Flexible Electrode for Supercapacitors

Mingping He; Jianguang Li; Wanli Xu; Zhenqiang Dong; Yuechao Wu; Liang Lv

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자료유형: 학술저널

저자정보: Mingping He (Quzhou University) Jianguang Li (Quzhou University) Wanli Xu (Quzhou University) Zhenqiang Dong (Quzhou University) Yuechao Wu (Quzhou University) Liang Lv (Quzhou University)

저널정보: 성균관대학교 성균나노과학기술원 NANO NANO Vol.14 No.6

발행연도: 2019.1

수록면: 86 - 93 (8page)

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Carbon nanotubes (CNTs) were welded on the surface of thermoplastic polypropylene (PP) substrate by laser irradiation and then manganese dioxide (MnO2) was deposited on the surface of CNTs by electrochemical method to prepare CNTs/MnO2 flexible electrodes (L-CM). The microstructure and morphology of CNTs/MnO2 composites were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The results showed that CNTs were welded on the surface of the substrate, adhering to each other to form a porous network structure. In addition, there were distinct small protrusions on the surface of CNTs, indicating that MnO2 had been successfully deposited on the surface of CNTs. Cyclic voltammogram (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques were employed to investigate the electrochemical performance of the composites. Compared with CNTs/MnO2 composite prepared via compaction (denoted as C-CM), L-CM composite prepared under the laser power of 0.75W (denoted as L-CM75) showed a larger capacitance of 214.6 F g-1 at the current density of 0.5 A g-1 and displayed excellent bendability, demonstrating capacitance retention of approximately 89.6% after 1000 bending cycles. The excellent performance of L-CM75 may be attributed to the fact that the CNTs welded on the substrate have formed an effective conductive network whose porous structure can facilitate easy access of electrolytes to the electrode, which results in enhancement of the electrochemical performance of L-CM75.

#Carbon nanotubes #manganese dioxide #laser welding #electrochemical properties

참고문헌 (30)

참고문헌 신청

R. Raccichini / 2015 / Nat. Mater 14:271

W. Li / 2016 / Nat. Rew. Mater 1:16023

Chao Wu / 2016 / High-Performance Supercapacitor based on the NaOH Activated D-Glucose Derived Carbon / NANO 11(7):37~45

Hao Wen / 2018 / 2D Coordination Polymer Derived Co3O4 Nanocrystals as High Performance Anode Material of Lithium-Ion Batteries / NANO 13(12):16~25

D. Song / 2018 / ACS Appl. Mater. Interf 10:22303

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