Enhanced cycling properties of transition metal molybdates, Li x M2(MoO4)3 {0∈x∈<∈3} [M∈=∈Co,Ni]: A nanocomposite approach for lithium batteries
Nanocomposite electrodes of recently identified polyanion cathode materials comprising Li <sub>x</sub> M<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> {0∈ ∈x∈<∈3} [M∈=∈Co, Ni] and nanosized carbon having ~10 nm particle size were found to...
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| Format: | Article |
| Language: | English |
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2007
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| Online Access: | http://scholars.utp.edu.my/id/eprint/415/ http://scholars.utp.edu.my/id/eprint/415/1/paper.pdf |
| Summary: | Nanocomposite electrodes of recently identified polyanion cathode materials comprising Li <sub>x</sub> M<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> {0∈ ∈x∈<∈3} [M∈=∈Co, Ni] and nanosized carbon having ~10 nm particle size were found to show remarkable improvement in their discharge capacity compared to the one prepared with acetylene black. The addition of nanosized carbon as a conductive additive offered improved initial discharge capacity of 121 mAh/g between 3.5-2.0 V vs Li/Li. The cause for such an increase could be firmly attributed to the filling up of the grain-grain contact area of the active material, facilitating the intimate grain-grain contacts in the composite structure leading to enhanced capacity delivery. As for the nanocomposite Li <sub>x</sub> Co<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub>, it was found that at least 55% of its first discharge capacity was retained at the end of 20th cycle compared to its analogous counterpart, Li <sub>x</sub> Ni <sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub>. © 2007 Springer-Verlag.
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