Enhancement of electrochemical properties of Ca3Co4O9 as anode materials for lithium-ion batteries by transition metal doping |
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| Authors: | Natkrita Prasoetsopha Supree Pinitsoontorn Shufen Fan Huey Hoon Hng Santi Maensiri |
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| Affiliation: | 1.School of Physics, Institute of Science,Suranaree University of Technology,Nakhon Ratchasima,Thailand;2.Integrated Nanotechnology Research Center, Department of Physics, Faculty of Science,Khon Kaen University,Khon Kaen,Thailand;3.Nanotec-KKU Center of Excellence on Advanced Nanomaterials for Energy Production and Storage,Khon Kaen University,Khon Kaen,Thailand;4.School of Materials Science and Engineering,Nanyang Technological University,Singapore,Singapore |
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| Abstract: | Misfit-layered calcium cobaltites (Ca3Co4O9, Ca3Co3.9Fe0.1O9, and Ca3Co3.9Mn0.1O9), as anode materials for lithium-ion batteries, were synthesized by a simple hydro-decomposition method. All synthesized samples do not show any impurity phase. They exhibited plate-like particle with the particle size of 1–2 μm. The specific capacities of doped samples showed higher electrochemical performance compared to the undoped sample. After charge/discharge of 50 cycles, the specific capacities of Ca3Co4O9, Ca3Co3.9Fe0.1O9, and Ca3Co3.9Mn0.1O9 were 343, 562, and 581 mAh g?1, respectively. The doped samples showed an increase of over 60% compared to the undoped sample. The cyclic voltammetry profile of the doped samples showed the enhanced reactivity corresponding to their improved electrochemical performance. The capacity improvement of doped samples resulted from the metal oxide/Li conversion reactions, volume change, and high reactivity. |
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