AI Article Synopsis
- Transition metal polyanion compounds, like NaMPO, are promising for sodium-ion batteries due to their higher energy densities compared to oxide equivalents.
- The study focuses on synthesizing a NaCoPO ("Red"-phase) compound using a microwave-assisted method at 200 °C with tetraethylene glycol as the solvent.
- Techniques like XRD, XANES, and electrochemical tests confirm the reversibility of the cobalt redox center in the new compound.
Article Abstract
Transition metal-containing polyanion compounds are attractive for use as cathode materials in sodium-ion batteries (SIB) because they possess elevated higher intrinsic electrochemical potentials versus oxide analogs given the same M redox couple, which leads to higher energy densities. NaMPO (M = transition metal) compounds have a driving force to form into the electrochemically inactive maricite phase when using conventional methods. Herein we report on the synthesis of a NaCoPO (NCP) polymorph ("Red"-phase) by a microwave-assisted solvothermal process at 200 °C using tetraethylene glycol as the solvent. Ex situ XRD, XANES, and electrochemical data are used to determine the reversibility of the Co redox center.
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| http://dx.doi.org/10.1021/acsami.6b14341 | DOI Listing |
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