Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 42, Pages 20908-20912Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta06361b
Keywords
-
Funding
- Council of Scientific and Industrial Research (CSIR)
- CSIR-Nehru Postdoctoral Fellowship
Ask authors/readers for more resources
Incorporating nickel and magnesium into P2-Na0.67MnO2 is expected to suppress Jahn-Teller active Mn3+ ions, increase the average potential of the electrode through Ni4+/Ni2+ redox couples and stabilize M-O layers resulting in a smooth cycling profile with better capacity retention. In this communication, P2-Na0.67Ni0.25Mg0.1Mn0.65O2 is reported as the cathode material for rechargeable Na-ion batteries. It reversibly intercalates similar to 0.52 moles of Na per formula unit in the voltage region of 1.5-4.2 V at C/10 rate which corresponds to a specific capacity of 140 mA h g(-1). X-ray photoelectron spectroscopy has attributed the origin of the capacity in this phase to both Ni and Mn redox species active at different potential ranges. Substituting part of Mn with Ni and Mg increases the average potential of Na0.67MnO2 and improves the energy density of Na0.67Ni0.25Mg0.1Mn0.65O2 to 335 W h kg(-1).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available