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Manganese buffer induced high-performance disordered MnVO cathodes in zinc batteries
- Source :
- Energy & Environmental Science. 14:3954-3964
- Publication Year :
- 2021
- Publisher :
- Royal Society of Chemistry (RSC), 2021.
-
Abstract
- Buffer reactions can prevent changes induced by external causes. Here, we demonstrate the significant buffer role of a very small amount of Mn in a self-optimized cathode for an aqueous Zn-ion battery. Our operando X-ray characterization studies reveal that the dissolution of most of the Mn in MnV2O4 during the first charging cycle induces atomic re-arrangement to form a disordered vanadium oxide phase with 0.88 at% Mn. Interestingly, the residual Mn ions exhibit voluntary migration between tetrahedral and octahedral sites during Zn2+ de/intercalation. This Mn migration not only stabilizes the main structure of the vanadium-based electrode, but also modulates the Fermi surface of V 3d against excessive drift. As result, the optimized cathode delivers an excellent capacity of 610.2 mA h g−1 at 0.2 A g−1 and long-term cycling stability over 4000 cycles. This buffer contribution via tunable metal ions exhibits high potential for applications in long-life metal-ion batteries and related fields.
- Subjects :
- Battery (electricity)
Materials science
Renewable Energy, Sustainability and the Environment
Metal ions in aqueous solution
Intercalation (chemistry)
Inorganic chemistry
Vanadium
chemistry.chemical_element
Zinc
Manganese
Pollution
Vanadium oxide
Cathode
law.invention
Nuclear Energy and Engineering
chemistry
law
Environmental Chemistry
Subjects
Details
- ISSN :
- 17545706 and 17545692
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- Energy & Environmental Science
- Accession number :
- edsair.doi...........0dc9075777a364325d2a3ce8f1dd36a9