Journal
NANOSCALE
Volume 7, Issue 18, Pages 8361-8367Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr01391g
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Funding
- Creative Industrial Technology Development Program - Ministry of Trade, Industry & Energy (MI, Korea) [10045141]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10045141] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A novel structure denoted a hollow nanosphere aggregate is synthesized by introducing nanoscale Kirkendall diffusion to the spray pyrolysis process. The hollow Fe2O3 nanosphere aggregates with spherical shape and micron size are synthesized as the first target material. A solid iron oxide-carbon composite powder that is prepared by a one-pot spray pyrolysis process is transformed into the hollow Fe2O3 nanosphere aggregates by sequential post-pyrolysis treatments under reducing and oxidizing atmospheres. The nanoscale Kirkendall diffusion plays a key role in the formation of the hollow Fe2O3 nanosphere aggregates with spherical shape and micron size. The unique structure of the hollow Fe2O3 nanosphere aggregates results in their superior electrochemical properties as an anode material for lithium ion batteries by improving the structural stability during cycling. The hollow metal oxide nanosphere aggregates with various compositions for wide applications including energy storage can be prepared by the simple fabrication method introduced in this study.
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