Journal article
Micro-/Nanostructured Co3O4 Anode with Enhanced Rate Capability for Lithium-Ion Batteries
Institute of Nuclear and New Energy Technology1
Beijing Key Lab of Fine Ceramics2
Beijing National Center for Electron Microscopy, School of Materials Science and Engineering3
Through a facile hydrothermal method with a special surfactant triethanolamine (TEA) followed by thermal treatment, monodispersed micro-/nanostructured Co3O4 powders with unique morphology (cube) have been synthesized successfully as anode material for Li-ion batteries (LIBs). The regular Co3O4 microcubes (∼2.37 μm in the average side length) consist of many irregular nanoparticles (20–200 nm in diameter, 30–40 nm in thickness) bonded to each other, which greatly inherit the morphology and size of the precursor CoCO3.
The specific surface area of Co3O4 powders is about 5.10 m2·g–1 by the Brunauer–Emmett–Teller (BET) method, and the average pore size is about 3.08 nm by the Barrett–Joyner–Halenda (BJH) method. In addition, the precursor is verified as a single-crystal, while the mesoporous cubic Co3O4 is a polycrystalline characteristic assembled by numerous single-crystal nanoparticles. More remarkable, the high performance of the micro-/nanostructured cubic Co3O4 powders has been obtained by the electrochemical measurements including high initial discharge capacities (1298 mAhg–1 at 0.1 C and 1041 mAhg–1 at 1 C), impressive rate capability, and excellent capacity retention (99.3%, 97.5%, 99.2%, and 89.9% of the first charge capacities after 60 cycles at 0.1 C, 0.2 C, 0.5 C, and 1 C, respectively).
Language: | English |
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Publisher: | American Chemical Society |
Year: | 2014 |
Pages: | 7236-7243 |
ISSN: | 19448252 and 19448244 |
Types: | Journal article |
DOI: | 10.1021/am500452t |