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- Title
Preparation of Stainless Steel Mesh-Supported MnO<sub>2</sub>/Polypyrrole Nanocomposites as Binder-Free Electrode for Supercapacitor.
- Authors
Zhang, Liang; Peng, Xiaolei; Wan, Junning; Cui, Qiang; Chu, Xuefeng; Suo, Hui; Zhao, Chun; He, Dong
- Abstract
Designing and preparation of excellent energy storage electrodes are of significance for supercapacitor. In this work, a self-supported electrode was successfully fabricated by electrodepositing MnO2 and polypyrrole (PPy) on stainless steel mesh (SSM) via amperometric measurements in different monomer solution. The electrode presented a specific capacitance of 239 F g − 1 at a current density of 1 A g − 1 and 86.7% capacitance retention after 10 000 cycles. The in situ growth of MnO2 and PPy on SSM led to greater stability, higher conductivity and better robustness, which ensured the achievement of excellent electrochemical performance of the electrode accompanied with the synergetic effect between MnO2 and PPy to improve the electron transfer and take fully advantage of active materials. A binder-free electrode has been prepared on stainless steel mesh (SSM) via a two-step electrodeposition method. MnO2 rods were first grown on SSM (SSM–MnO2), and then polypyrrole was loaded on SSM–MnO2. The final SSM–MnO2/PPy electrode showed a specific capacitance of 239 F g–1 at a current density of 1 A g–1, and excellent cycle stability with ca. 86.7% capacitance retention after 10000 cycles. The above great performance can be attributed to the in situ growth method.
- Subjects
SUPERCAPACITOR electrodes; STAINLESS steel; ELECTRODE performance; ELECTROCHEMICAL electrodes; ENERGY storage; CHARGE exchange
- Publication
NANO, 2020, Vol 15, Issue 3, pN.PAG
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292020500319