Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+
Abstract Aqueous rechargeable Zn/MnO2 zinc-ion batteries (ZIBs) are reviving recently due to their low cost, non-toxicity, and natural abundance. However, their energy storage mechanism remains controversial due to their complicated electrochemical reactions. Meanwhile, to achieve satisfactory cycli...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-06-01
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| Series: | Nano-Micro Letters |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/s40820-019-0278-9 |
| _version_ | 1819226767998582784 |
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| author | Yongfeng Huang Jian Mou Wenbao Liu Xianli Wang Liubing Dong Feiyu Kang Chengjun Xu |
| author_facet | Yongfeng Huang Jian Mou Wenbao Liu Xianli Wang Liubing Dong Feiyu Kang Chengjun Xu |
| author_sort | Yongfeng Huang |
| collection | DOAJ |
| description | Abstract Aqueous rechargeable Zn/MnO2 zinc-ion batteries (ZIBs) are reviving recently due to their low cost, non-toxicity, and natural abundance. However, their energy storage mechanism remains controversial due to their complicated electrochemical reactions. Meanwhile, to achieve satisfactory cyclic stability and rate performance of the Zn/MnO2 ZIBs, Mn2+ is introduced in the electrolyte (e.g., ZnSO4 solution), which leads to more complicated reactions inside the ZIBs systems. Herein, based on comprehensive analysis methods including electrochemical analysis and Pourbaix diagram, we provide novel insights into the energy storage mechanism of Zn/MnO2 batteries in the presence of Mn2+. A complex series of electrochemical reactions with the co-participation of Zn2+, H+, Mn2+, SO4 2−, and OH− were revealed. During the first discharge process, co-insertion of Zn2+ and H+ promotes the transformation of MnO2 into Zn x MnO4, MnOOH, and Mn2O3, accompanying with increased electrolyte pH and the formation of ZnSO4·3Zn(OH)2·5H2O. During the subsequent charge process, Zn x MnO4, MnOOH, and Mn2O3 revert to α-MnO2 with the extraction of Zn2+ and H+, while ZnSO4·3Zn(OH)2·5H2O reacts with Mn2+ to form ZnMn3O7·3H2O. In the following charge/discharge processes, besides aforementioned electrochemical reactions, Zn2+ reversibly insert into/extract from α-MnO2, Zn x MnO4, and ZnMn3O7·3H2O hosts; ZnSO4·3Zn(OH)2·5H2O, Zn2Mn3O8, and ZnMn2O4 convert mutually with the participation of Mn2+. This work is believed to provide theoretical guidance for further research on high-performance ZIBs. |
| first_indexed | 2024-12-23T10:30:44Z |
| format | Article |
| id | doaj.art-f245eaa3ec3b496aad73956c8c10ef52 |
| institution | Directory Open Access Journal |
| issn | 2311-6706 2150-5551 |
| language | English |
| last_indexed | 2024-12-23T10:30:44Z |
| publishDate | 2019-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nano-Micro Letters |
| spelling | doaj.art-f245eaa3ec3b496aad73956c8c10ef522022-12-21T17:50:27ZengSpringerOpenNano-Micro Letters2311-67062150-55512019-06-0111111310.1007/s40820-019-0278-9Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+Yongfeng Huang0Jian Mou1Wenbao Liu2Xianli Wang3Liubing Dong4Feiyu Kang5Chengjun Xu6Shenzhen Geim Graphene Center, Graduate School at Shenzhen, Tsinghua UniversityShenzhen Geim Graphene Center, Graduate School at Shenzhen, Tsinghua UniversityShenzhen Geim Graphene Center, Graduate School at Shenzhen, Tsinghua UniversityShenzhen Geim Graphene Center, Graduate School at Shenzhen, Tsinghua UniversityShenzhen Geim Graphene Center, Graduate School at Shenzhen, Tsinghua UniversityShenzhen Geim Graphene Center, Graduate School at Shenzhen, Tsinghua UniversityShenzhen Geim Graphene Center, Graduate School at Shenzhen, Tsinghua UniversityAbstract Aqueous rechargeable Zn/MnO2 zinc-ion batteries (ZIBs) are reviving recently due to their low cost, non-toxicity, and natural abundance. However, their energy storage mechanism remains controversial due to their complicated electrochemical reactions. Meanwhile, to achieve satisfactory cyclic stability and rate performance of the Zn/MnO2 ZIBs, Mn2+ is introduced in the electrolyte (e.g., ZnSO4 solution), which leads to more complicated reactions inside the ZIBs systems. Herein, based on comprehensive analysis methods including electrochemical analysis and Pourbaix diagram, we provide novel insights into the energy storage mechanism of Zn/MnO2 batteries in the presence of Mn2+. A complex series of electrochemical reactions with the co-participation of Zn2+, H+, Mn2+, SO4 2−, and OH− were revealed. During the first discharge process, co-insertion of Zn2+ and H+ promotes the transformation of MnO2 into Zn x MnO4, MnOOH, and Mn2O3, accompanying with increased electrolyte pH and the formation of ZnSO4·3Zn(OH)2·5H2O. During the subsequent charge process, Zn x MnO4, MnOOH, and Mn2O3 revert to α-MnO2 with the extraction of Zn2+ and H+, while ZnSO4·3Zn(OH)2·5H2O reacts with Mn2+ to form ZnMn3O7·3H2O. In the following charge/discharge processes, besides aforementioned electrochemical reactions, Zn2+ reversibly insert into/extract from α-MnO2, Zn x MnO4, and ZnMn3O7·3H2O hosts; ZnSO4·3Zn(OH)2·5H2O, Zn2Mn3O8, and ZnMn2O4 convert mutually with the participation of Mn2+. This work is believed to provide theoretical guidance for further research on high-performance ZIBs.http://link.springer.com/article/10.1007/s40820-019-0278-9Zinc-ion batteryMnO2 cathodeEnergy storage mechanismPhase evolution |
| spellingShingle | Yongfeng Huang Jian Mou Wenbao Liu Xianli Wang Liubing Dong Feiyu Kang Chengjun Xu Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+ Nano-Micro Letters Zinc-ion battery MnO2 cathode Energy storage mechanism Phase evolution |
| title | Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+ |
| title_full | Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+ |
| title_fullStr | Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+ |
| title_full_unstemmed | Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+ |
| title_short | Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+ |
| title_sort | novel insights into energy storage mechanism of aqueous rechargeable zn mno2 batteries with participation of mn2 |
| topic | Zinc-ion battery MnO2 cathode Energy storage mechanism Phase evolution |
| url | http://link.springer.com/article/10.1007/s40820-019-0278-9 |
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