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High-Energy-Density Aqueous Magnesium-Ion Battery Based on a Carbon-Coated FeVO4 Anode and a Mg-OMS-1 Cathode.
- Source :
-
Chemistry - A European Journal . 12/1/2017, Vol. 23 Issue 67, p17118-17126. 9p. - Publication Year :
- 2017
-
Abstract
- Porous FeVO4 is prepared by hydrothermal method and further modified by coating with carbon to obtain FeVO4/C with a hierarchical pore structure. FeVO4/C is used as an anodic electrode in aqueous rechargeable magnesium-ion batteries. The FeVO4/C material not only has improved electrical conductivity as a result of the carbon coating layer, but also has an increased specific surface area as a result of the hierarchical pore structure, which is beneficial for magnesium-ion insertion/deinsertion. Therefore, an aqueous rechargeable magnesium-ion full battery is successfully constructed with FeVO4/C as the anode, Mg-OMS-1 (OMS=octahedral molecular sieves) as the cathode, and 1.0 mol L−1 MgSO4 as the electrolyte. The discharge capacity of the Mg-OMS-1//FeVO4/C aqueous battery is 58.9 mAh g−1 at a current density of 100 mA g−1; this value is obtained by calculating the total mass of two electrodes and the capacity retention rate of this device is 97.7 % after 100 cycles, with almost 100 % coulombic efficiency, which indicates that the system has a good electrochemical reversibility. Additionally, this system can achieve a high energy density of 70.4 Wh kg−1, which provides powerful evidence that an aqueous magnesium-ion battery is possible. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09476539
- Volume :
- 23
- Issue :
- 67
- Database :
- Academic Search Index
- Journal :
- Chemistry - A European Journal
- Publication Type :
- Academic Journal
- Accession number :
- 126529897
- Full Text :
- https://doi.org/10.1002/chem.201703806