Journal
NANOSCALE
Volume 8, Issue 4, Pages 1975-1985Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr05179g
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Funding
- National Natural Science Foundation of China [51372114, 61474063, 11302100]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- NUAA Fundamental Research Funds [NN2012018, NP2013301, NJ20140002, NS2013095]
- Funding of Jiangsu Innovation Program for Graduate Education [KYLX_0262]
- Fundamental Research Funds for the Central Universities
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Bundle-like alpha'-NaV2O5 mesocrystals were synthesized successfully by a two-step hydrothermal method. Observations using electron microscopy revealed that the obtained NaV2O5 mesocrystals were composed of nanobelts with the preferential growth direction of [010]. The precise crystal structure was further confirmed by Rietveld refinement and Raman spectroscopy. Based on analysis of crystal structure and microscopy, a reaction and growth mechanism, hydrolysis-condensation (oxolation and olation)-ion exchange-self-assembly, was proposed and described in detail. Furthermore, electrochemical measurements were used to analyze the Na-ions intercalation/deintercalation abilities in NaV2O5, and indicated that Na-ions were difficult to extract. Importantly, the DFT theoretical calculation results, which showed that the migration energy of Na-ions was so huge that migration of Na-ions was quite difficult, can explain and support well the results of the electrochemical measurements.
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