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Highly Reversible Cuprous Mediated Cathode Chemistry for Magnesium Batteries.
- Source :
-
Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2020 Jul 06; Vol. 59 (28), pp. 11477-11482. Date of Electronic Publication: 2020 May 11. - Publication Year :
- 2020
-
Abstract
- Sluggish kinetics and poor reversibility of cathode chemistry is the major challenge for magnesium batteries to achieve high volumetric capacity. Introduction of the cuprous ion (Cu <superscript>+</superscript> ) as a charge carrier can decouple the magnesiation related energy storage from the cathode electrochemistry. Cu <superscript>+</superscript> is generated from a fast equilibrium between copper selenide electrode and Mg electrolyte during standing time, rather than in the electrochemical process. A reversible chemical magnesiation/de-magnesiation can be driven by this solid/liquid equilibrium. During a typical discharge process, Cu <superscript>+</superscript> is reduced to Cu and drives the equilibrium to promote the magnesiation process. The reversible Cu to Cu <superscript>+</superscript> redox promotes the recharge process. This novel Cu <superscript>+</superscript> mediated cathode chemistry of Mg battery leads to a high reversible areal capacity of 12.5 mAh cm <superscript>-2</superscript> with high mass loading (49.1 mg cm <superscript>-2</superscript> ) of the electrode. 80 % capacity retention can be achieved for 200 cycles after a conditioning process.<br /> (© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Details
- Language :
- English
- ISSN :
- 1521-3773
- Volume :
- 59
- Issue :
- 28
- Database :
- MEDLINE
- Journal :
- Angewandte Chemie (International ed. in English)
- Publication Type :
- Academic Journal
- Accession number :
- 32277864
- Full Text :
- https://doi.org/10.1002/anie.202002177