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Micromachines
Volume 16
Issue 5
10.3390/mi16050536
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Electrode Design Based on Porous MnO2/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries

by
Shilin Li
1,
Taoyun Zhou
1,*,
Muzhou Liu
1,
Qiaomei Zhao
1,
Yi Liu
1,
Yun Cheng
1 and
Xinyu Li
2
1
School of Information, Hunan University of Humanities, Science and Technology, Loudi 417099, China
2
Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Physics and Electronic Information Engineering, Guilin University of Technology, Guilin 541004, China
*
Author to whom correspondence should be addressed.
Micromachines 2025, 16(5), 536; https://doi.org/10.3390/mi16050536 (registering DOI)
Submission received: 12 March 2025 / Revised: 20 April 2025 / Accepted: 28 April 2025 / Published: 29 April 2025
(This article belongs to the Special Issue Advanced Graphene Nanomaterials: Synthesis, Characterization and Application)
Versions Notes

Abstract

The development of safe, cost-effective, and environmentally friendly energy storage systems has spurred growing interest in aqueous ZIBs. However, the poor cycling stability of cathode materials—mainly due to manganese dissolution and structural degradation—remains a major bottleneck. In this work, a porous MnO2/PPy hybrid nanocomposite is successfully synthesized via an in situ co-precipitation strategy. The conductive PPy buffer layer not only alleviates Mn dissolution and buffers volume expansion during cycling but also enhances ion/electron transport and facilitates electrolyte infiltration due to its high surface area. Electrochemical evaluation reveals that the MnO2/PPy electrode delivers excellent cycling stability, retaining 75% of its initial capacity after 1000 cycles at a current density of 1 A·g−1. Comparative performance analysis shows that MnO2/PPy exhibits superior capacity retention and rate capability, especially under high current densities and prolonged cycling. These results underscore the effectiveness of the PPy interfacial layer in improving structural integrity and electrochemical performance, offering a promising route for designing high-performance cathode materials for aqueous ZIBs.
Keywords: MnO2/PPy hybrid nanocomposite; zinc-ion battery; cycling stability; electrochemical performance MnO2/PPy hybrid nanocomposite; zinc-ion battery; cycling stability; electrochemical performance

Share and Cite

MDPI and ACS Style

Li, S.; Zhou, T.; Liu, M.; Zhao, Q.; Liu, Y.; Cheng, Y.; Li, X. Electrode Design Based on Porous MnO2/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries. Micromachines 2025, 16, 536. https://doi.org/10.3390/mi16050536

AMA Style

Li S, Zhou T, Liu M, Zhao Q, Liu Y, Cheng Y, Li X. Electrode Design Based on Porous MnO2/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries. Micromachines. 2025; 16(5):536. https://doi.org/10.3390/mi16050536

Chicago/Turabian Style

Li, Shilin, Taoyun Zhou, Muzhou Liu, Qiaomei Zhao, Yi Liu, Yun Cheng, and Xinyu Li. 2025. "Electrode Design Based on Porous MnO2/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries" Micromachines 16, no. 5: 536. https://doi.org/10.3390/mi16050536

APA Style

Li, S., Zhou, T., Liu, M., Zhao, Q., Liu, Y., Cheng, Y., & Li, X. (2025). Electrode Design Based on Porous MnO2/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries. Micromachines, 16(5), 536. https://doi.org/10.3390/mi16050536

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