Electrode Design Based on Porous MnO<sub>2</sub>/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries
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,...
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| Format: | Article |
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MDPI AG
2025-04-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/16/5/536 |
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| author | Shilin Li Taoyun Zhou Muzhou Liu Qiaomei Zhao Yi Liu Yun Cheng Xinyu Li |
| author_facet | Shilin Li Taoyun Zhou Muzhou Liu Qiaomei Zhao Yi Liu Yun Cheng Xinyu Li |
| author_sort | Shilin Li |
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| description | 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 MnO<sub>2</sub>/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 MnO<sub>2</sub>/PPy electrode delivers excellent cycling stability, retaining 75% of its initial capacity after 1000 cycles at a current density of 1 A·g<sup>−1</sup>. Comparative performance analysis shows that MnO<sub>2</sub>/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. |
| format | Article |
| id | doaj-art-87e89d3b654d4304afdf10dbcc09a4c6 |
| institution | OA Journals |
| issn | 2072-666X |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
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| series | Micromachines |
| spelling | doaj-art-87e89d3b654d4304afdf10dbcc09a4c62025-08-20T01:56:41ZengMDPI AGMicromachines2072-666X2025-04-0116553610.3390/mi16050536Electrode Design Based on Porous MnO<sub>2</sub>/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion BatteriesShilin Li0Taoyun Zhou1Muzhou Liu2Qiaomei Zhao3Yi Liu4Yun Cheng5Xinyu Li6School of Information, Hunan University of Humanities, Science and Technology, Loudi 417099, ChinaSchool of Information, Hunan University of Humanities, Science and Technology, Loudi 417099, ChinaSchool of Information, Hunan University of Humanities, Science and Technology, Loudi 417099, ChinaSchool of Information, Hunan University of Humanities, Science and Technology, Loudi 417099, ChinaSchool of Information, Hunan University of Humanities, Science and Technology, Loudi 417099, ChinaSchool of Information, Hunan University of Humanities, Science and Technology, Loudi 417099, ChinaKey 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, ChinaThe 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 MnO<sub>2</sub>/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 MnO<sub>2</sub>/PPy electrode delivers excellent cycling stability, retaining 75% of its initial capacity after 1000 cycles at a current density of 1 A·g<sup>−1</sup>. Comparative performance analysis shows that MnO<sub>2</sub>/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.https://www.mdpi.com/2072-666X/16/5/536MnO<sub>2</sub>/PPy hybrid nanocompositezinc-ion batterycycling stabilityelectrochemical performance |
| spellingShingle | Shilin Li Taoyun Zhou Muzhou Liu Qiaomei Zhao Yi Liu Yun Cheng Xinyu Li Electrode Design Based on Porous MnO<sub>2</sub>/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries Micromachines MnO<sub>2</sub>/PPy hybrid nanocomposite zinc-ion battery cycling stability electrochemical performance |
| title | Electrode Design Based on Porous MnO<sub>2</sub>/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries |
| title_full | Electrode Design Based on Porous MnO<sub>2</sub>/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries |
| title_fullStr | Electrode Design Based on Porous MnO<sub>2</sub>/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries |
| title_full_unstemmed | Electrode Design Based on Porous MnO<sub>2</sub>/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries |
| title_short | Electrode Design Based on Porous MnO<sub>2</sub>/PPy Hybrid Nanocomposite and Its Application in Zinc-Ion Batteries |
| title_sort | electrode design based on porous mno sub 2 sub ppy hybrid nanocomposite and its application in zinc ion batteries |
| topic | MnO<sub>2</sub>/PPy hybrid nanocomposite zinc-ion battery cycling stability electrochemical performance |
| url | https://www.mdpi.com/2072-666X/16/5/536 |
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