Efficient pathways to improve electrode performance of P′2 Na<sub>2/3</sub>MnO<sub>2</sub> for sodium batteries
A Mn-based sodium-containing layered oxide, P'2-type Na<sub>2/3</sub>MnO<sub>2</sub>, is revisited as a positive electrode material for sodium-ion batteries, and factors affecting its electrochemical performances are examined. The cyclability of Na<sub>2/3</sub>MnO<sub>2</sub> is remarkably improved by increasing the lower cut-off voltage during cycling even though the reversible capacity is sacrificed. Furthermore, the use of highly concentrated electrolytes, in which the presence of free solvent molecules is eliminated, effectively suppresses the dissolution of Mn ions, thus enabling stable cycling with >85% capacity retention for 300 continuous cycles.
Authors
- Yosuke Ugata (ORCID: https://orcid.org/0000-0002-8233-6725)
- Naoaki Yabuuchi (ORCID: https://orcid.org/0000-0002-9404-5693)
- Tomohiro Kuriyama
Institutions
- Yokohama National University (JP)
Publication Details
- Journal
- Chemical Communications
- Published
- 2024-11-29
- DOI
- https://doi.org/10.1039/d4cc04719b
- Citations
- 7
- Primary Topic
- Advancements in Battery Materials
- Type
- article
- Field-Weighted Citation Impact
- 1.46
Funders
- Ministry of Education, Culture, Sports, Science and Technology
- Japan Society for the Promotion of Science
- Japan Science and Technology Agency
- Core Research for Evolutional Science and Technology