Abstract
The power battery was manufactured with the commercial LiMn2O4 and graphite, and its storage performances with different charged state were studied. Structure, morphology, and surface-state change of the LiMn2O4 before and after storage were observed by XRD, SEM, XPS, CV, and AC technique, respectively. The electrochemical performances of LiMn2O4 battery were tested. The result shows that the capacity recovery of LiMn2O4 stored at discharge state is best (99.2%). While that of full-charged state is worst (93.6%). The cyclic performance of LiMn2O4 battery after storage is improved. The cyclic performance of LiMn2O4 stored at full-charged state is best (capacity retention ratio of 89.8% after 200 cycles), while that of before storage is 83.0%. The crystal of the spinel was destroyed after storage, and the intensity of breakage is increased with charge state increasing. The amount of soluble Mn and Li-ion migration resistance (R f) are increased with charge state increasing, and the oxygen loss is detected.
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The project was sponsored by Advanced Person Fund of Jiangsu University (10JDG041) and the Natural Science Foundation of Jiangsu Province (BK2011530).
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Liu, Y., Guo, H., Li, X. et al. Storage performance with different charged state of manganese spinel battery. Ionics 18, 643–648 (2012). https://doi.org/10.1007/s11581-012-0680-5
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DOI: https://doi.org/10.1007/s11581-012-0680-5