Template-Free Synthesis of Hollow-Structured Co3O4 Nanoparticles as High-Performance Anodes for Lithium-Ion Batteries
- 23 January 2015
- journal article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 9 (2), 1775-1781
- https://doi.org/10.1021/nn506624g
Abstract
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 impregnation-reduction 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.Keywords
Funding Information
- Ministry of Education of the People's Republic of China (20130142120039, 2013TS136, 2014YQ009, NCET-13-0237)
- U.S. Department of Energy (DE-FG02-87ER45298)
- National Natural Science Foundation of China (21306060)
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