Journal
DALTON TRANSACTIONS
Volume 45, Issue 2, Pages 458-461Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5dt03276h
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Funding
- Mitsubishi Foundation
- Yazaki Memorial Foundation
- Nippon Sheet Glass Foundation
- Photon Factory Program Advisory Committee [2014G507]
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Metal-hexacyanoferrates (metal-HCFs) are promising candidates for cathode materials of sodium-ion secondary batteries (SIBs). Here, we systematically investigated Na+ diffusion constants (D) and the activation energies (Ea) of metal-HCFs against the framework size (= a/2). We found that the magnitude of D (E-a) systematically increases (decreases) with increases in a, indicating that steric hindrance plays a dominant role in Na+ diffusion.
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