Development of long life lithium ion battery for power storage |
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Affiliation: | 1. Institute of Environmental & Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450000, China;2. Yangzhou Research Academy of Energy and Material, Chinese Academy of Sciences, Yangzhou 225000, China;1. Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, South Korea;2. Battery Materials Research Center, Research Institute of Industrial Science & Technology (RIST), Pohang 37673, South Korea |
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Abstract: | With the aim of developing lithium ion batteries with a long life and high efficiency for power storage, we experimentally evaluated combinations of cathode and anode active materials, in which batteries are able to obtain over 4000 cycles or 10 years of life. An acceleration method was evaluated using coin cells. We found that changing the current density was effective for evaluating battery life, since the logarithm of the cycle life showed a linear relationship to current density. Based on the current density increasing method, various combinations of cathode and anode active materials were tested. The cell system of LiCoO2/Li4/3Ti5/3O4 clearly showed a long life of about 4000 cycles. The energy density of the cell using the Li4/3Ti5/3O4 anode is obviously smaller than that using a graphite anode, the cell with Li4/3Ti5/3O4 anode was thought to have some merit especially in the large-scale-layer-built type battery by the applicability of the Al anode collector and a light weight battery case. |
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