1. Synthesis of three-dimensional β-MnO2/PPy composite for high-performance cathode in zinc-ion batteries.
- Author
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Liao, Xiaobo, Pan, Chengling, Pan, Yusong, and Yin, Chengjie
- Subjects
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CONDUCTING polymer composites , *CATHODES , *MICROSPHERES , *ENERGY storage , *STRUCTURAL stability , *NANOWIRES , *CHEMICAL kinetics - Abstract
• A three-dimensional mesoporous microsphere structural β-MnO 2 /PPy composite was obtained using a facile hydrothermal method. • The electric PPy nanowires linked each β-MnO 2 nanorods to significantly enhance the energy storage behavior of β-MnO 2. • The total capacity was dominated by the synergistic effect between the diffusion-controlled and capacitive behavior. [Display omitted] Mn-based materials as a cathode have drawn much attention in aqueous zinc-ion batteries (AZIBs) for its advantages of low cost and environmental friendliness. However, the sluggish reaction kinetics and low structural stability still limit the electrochemical application of Mn-based materials. Herein, a β-MnO 2 / polypyrrole (PPy) composite was synthesized using a facile hydrothermal method. It delivered a remarkable specific discharge capacity of 361.8 mAh g−1 at a current density of 0.2 A g−1 and great rate performance compared to pure MnO 2 powder. And morphological and electrochemical characterizations revealed that the enhanced electrochemical performance of β-MnO 2 /PPy composite was mainly attributed to the high conductivity of PPy nanowires and the 3D mesoporous microsphere structure, which was assembled by β-MnO 2 nanorods and PPy nanowires. This article provided a new sight of synthesizing Mn-based materials/conducting polymer composites for high-performance cathode in zinc-ion batteries. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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