Electrochemical Study of Polymorphic MnO<sub>2</sub> in Rechargeable Aqueous Zinc Batteries
Manganese dioxide is regarded as a promising energy functional material due to its open tunnel structure with enormous applications in energy storage and catalysis. In this paper, α-MnO<sub>2</sub> with a 2 × 2 tunnel structure and β-MnO<sub>2</sub> with a 1 × 1 tunnel struct...
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MDPI AG
2022-11-01
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| Online Access: | https://www.mdpi.com/2073-4352/12/11/1600 |
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| author | Kun You Yifei Yuan Xiuxian Liao Wenjun Song Xuedong He Huile Jin Shun Wang |
| author_facet | Kun You Yifei Yuan Xiuxian Liao Wenjun Song Xuedong He Huile Jin Shun Wang |
| author_sort | Kun You |
| collection | DOAJ |
| description | Manganese dioxide is regarded as a promising energy functional material due to its open tunnel structure with enormous applications in energy storage and catalysis. In this paper, α-MnO<sub>2</sub> with a 2 × 2 tunnel structure and β-MnO<sub>2</sub> with a 1 × 1 tunnel structure were hydrothermally synthesized, which possess characteristic tunnel structures formed by the interconnected unit structure of [MnO<sub>6</sub>] octahedrons. With regards to their different tunnel dimensions, the specific mechanism of ion intercalation in these two phases and the effect on their performance as aqueous Zn-MnO<sub>2</sub> battery cathodes are explored and compared. Comprehensive analyses illustrate that both α-MnO<sub>2</sub> and β-MnO<sub>2</sub> provide decent capacity in the aqueous battery system, but their intrinsic stability is poor due to the structural instability upon cycling. At the same time, experiments show that α-MnO<sub>2</sub> has a better rate performance than β-MnO<sub>2</sub> under larger currents, thus implying that the former has a broader application in this aqueous battery system. |
| first_indexed | 2024-03-09T19:10:01Z |
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| language | English |
| last_indexed | 2024-03-09T19:10:01Z |
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| spelling | doaj.art-1c5f86f417d741718b9869baa83f6fef2023-11-24T04:15:54ZengMDPI AGCrystals2073-43522022-11-011211160010.3390/cryst12111600Electrochemical Study of Polymorphic MnO<sub>2</sub> in Rechargeable Aqueous Zinc BatteriesKun You0Yifei Yuan1Xiuxian Liao2Wenjun Song3Xuedong He4Huile Jin5Shun Wang6Wenzhou Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, ChinaWenzhou Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, ChinaWenzhou Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, ChinaWenzhou Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, ChinaWenzhou Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, ChinaWenzhou Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, ChinaWenzhou Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, ChinaManganese dioxide is regarded as a promising energy functional material due to its open tunnel structure with enormous applications in energy storage and catalysis. In this paper, α-MnO<sub>2</sub> with a 2 × 2 tunnel structure and β-MnO<sub>2</sub> with a 1 × 1 tunnel structure were hydrothermally synthesized, which possess characteristic tunnel structures formed by the interconnected unit structure of [MnO<sub>6</sub>] octahedrons. With regards to their different tunnel dimensions, the specific mechanism of ion intercalation in these two phases and the effect on their performance as aqueous Zn-MnO<sub>2</sub> battery cathodes are explored and compared. Comprehensive analyses illustrate that both α-MnO<sub>2</sub> and β-MnO<sub>2</sub> provide decent capacity in the aqueous battery system, but their intrinsic stability is poor due to the structural instability upon cycling. At the same time, experiments show that α-MnO<sub>2</sub> has a better rate performance than β-MnO<sub>2</sub> under larger currents, thus implying that the former has a broader application in this aqueous battery system.https://www.mdpi.com/2073-4352/12/11/1600α-MnO<sub>2</sub> and β-MnO<sub>2</sub> nanostructuresaqueous zinc batterieselectrochemical characterization |
| spellingShingle | Kun You Yifei Yuan Xiuxian Liao Wenjun Song Xuedong He Huile Jin Shun Wang Electrochemical Study of Polymorphic MnO<sub>2</sub> in Rechargeable Aqueous Zinc Batteries Crystals α-MnO<sub>2</sub> and β-MnO<sub>2</sub> nanostructures aqueous zinc batteries electrochemical characterization |
| title | Electrochemical Study of Polymorphic MnO<sub>2</sub> in Rechargeable Aqueous Zinc Batteries |
| title_full | Electrochemical Study of Polymorphic MnO<sub>2</sub> in Rechargeable Aqueous Zinc Batteries |
| title_fullStr | Electrochemical Study of Polymorphic MnO<sub>2</sub> in Rechargeable Aqueous Zinc Batteries |
| title_full_unstemmed | Electrochemical Study of Polymorphic MnO<sub>2</sub> in Rechargeable Aqueous Zinc Batteries |
| title_short | Electrochemical Study of Polymorphic MnO<sub>2</sub> in Rechargeable Aqueous Zinc Batteries |
| title_sort | electrochemical study of polymorphic mno sub 2 sub in rechargeable aqueous zinc batteries |
| topic | α-MnO<sub>2</sub> and β-MnO<sub>2</sub> nanostructures aqueous zinc batteries electrochemical characterization |
| url | https://www.mdpi.com/2073-4352/12/11/1600 |
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