Despite intensive studies for the last several decades, the progress in the development of efficient cathode materials for rechargeable magnesium batteries is slow. In particular, most intercalation-based materials demonstrate lethargic reaction kinetics owing to a large activation barrier for Mg2+ migration. Here, for the first time, we evaluate silver chalcogenides as efficient cathode materials based on a conversion reaction mechanism. Simple one-pot ball milling is employed to produce silver chalcogenide nanoparticles embedded in a carbon matrix, which exhibits excellent electrochemical activity with Mg2+ at room temperature. Particularly, the Ag2Se composite delivers a theoretical magnesium storage capacity of 182 mA h g−1 at a 0.1-C rate and 79 mA h g−1 at a 1-C with an adequate stability up to 500 cycles. Structural analyses during cycling confirm that silver chalcogenides operate via a conversion reaction route. This investigation provides an opportunity to develop a new class of viable cathode materials utilizing conversion chemistry.
|Number of pages||7|
|Journal||Energy Storage Materials|
|Publication status||Published - 2020 May|
Bibliographical noteFunding Information:
This work was supported by the institutional program of the Korea Institute of Science and Technology (Project No. 2E29641 ), and a grant from the National Research Foundation of Korea ( NRF-2019M3D1A2103932 ). Appendix A
© 2019 Elsevier B.V.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Energy Engineering and Power Technology