Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 23, Issue 42, Pages 24478-24486Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cp03115e
Keywords
-
Funding
- Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS) [2016-01257]
- STandUP for Energy
- Swedish Research Council, VR [2017-05078]
- Swedish Foundation for Strategic Research (SSF) within the Swedish national graduate school in neutron scattering (SwedNess)
- Chalmers Area of Advance Materials Science
- Japan Society for the Promotion Science (JSPS) KAKENHI [JP18H01863, JP20K21149]
- Estonian Research Council [PUTJD957]
- High Energy Accelerator Research Organization (KEK)
- Swedish Research Council [2017-05078] Funding Source: Swedish Research Council
- Formas [2016-01257] Funding Source: Formas
Ask authors/readers for more resources
In this study, sodium transition metal oxides with a layered structure were investigated as cathode materials for Na+-ion batteries. The research utilized electrochemical and muon spin rotation and relaxation techniques to study the Na+-ion mobility in a specific cathode material. The results indicated that a small amount of Mg substitution significantly influenced the cycling performance and Na+ mobility, with the composition containing x = 0.02 showing the best stability and highest Na+ mobility.
Sodium transition metal oxides with a layered structure are one of the most widely studied cathode materials for Na+-ion batteries. Since the mobility of Na+ in such cathode materials is a key factor that governs the performance of material, electrochemical and muon spin rotation and relaxation techniques are here used to reveal the Na+-ion mobility in a P2-type Na0.5MgxNi0.17-xMn0.83O2 (x = 0, 0.02, 0.05 and 0.07) cathode material. Combining electrochemical techniques such as galvanostatic cycling, cyclic voltammetry, and the galvanostatic intermittent titration technique with mu+SR, we have successfully extracted both self-diffusion and chemical-diffusion under a potential gradient, which are essential to understand the electrode material from an atomic-scale viewpoint. The results indicate that a small amount of Mg substitution has strong effects on the cycling performance and the Na+ mobility. Amongst the tested cathode systems, it was found that the composition with a Mg content of x = 0.02 resulted in the best cycling stability and highest Na+ mobility based on electrochemical and mu+SR results. The current study clearly shows that for developing a new generation of sustainable energy-storage devices, it is crucial to study and understand both the structure as well as dynamics of ions in the material on an atomic level.
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