Journal
ACS NANO
Volume 9, Issue 2, Pages 1775-1781Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn506624g
Keywords
cobalt oxides; hollowed structure; anode materials; lithium battery; electrochemistry
Categories
Funding
- Department of Energy [DE-FG02-87ER45298]
- Energy Materials Center at Cornell (EMC2), an Energy Frontier Research Center - US. Department of Energy, Office of Basic Energy Sciences [DE-SC0001086]
- Natural Science Foundation of China [21306060]
- Program for New Century Excellent Talents in Universities of China [NCET-13-0237]
- Doctoral Fund of Ministry of Education of China [20130142120039]
- Fundamental Research Funds for the Central University [2013TS136, 2014YQ009]
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We have developed a template-free procedure to synthesize Co3O4 hollow-structured nanoparticles on a Vulcan XC-72 carbon support. The material was synthesized via an impregnationreduction method followed by air oxidation. In contrast to spherical particles, the hollow-structured Co3O4 nanoparticles exhibited excellent lithium storage capacity, rate capability, and cycling stability when used as the anode material in lithium-ion batteries. Electrochemical testing showed that the hollow-structured Co3O4 particles delivered a stable reversible capacity of about 880 mAh/g (near the theoretical capacity of 890 mAh/g) at a current density of 50 mA/g after 50 cycles. The superior electrochemical performance is attributed to its unique hollow structure, which combines nano- and microscale properties that facilitate electron transfer and enhance structural robustness.
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