Abstract
The major electrochemical performances of LiMn2O4 (LMO)-LiNi0.80Co0.15Al0.05O2 (NCA) blending cathodes with full-range ratios are evaluated in industrial perspective. The results indicate that the reversible lithium ions can be fully utilized when NCA percentage reaches up to 50 %. The median voltages of blends are higher than the value calculated from a linear relationship of the two pristine cathodes, which is beneficial to energy density. But a synergy effect on room-temperature cycle performance is not observed for the hybrid cathode. However, the high-temperature (45 °C) capacity retention with 70 % NCA is 97.9 % after 100 cycles, higher than both pristine cathodes. It is not until NCA content increases to more than 50 % that the high-rate performance is much deteriorated. Additionally, the swelling of fully charged pouch-type battery after 4 h storage at 85 °C disappears when NCA percentage is less than 50 %. Hence, it is practically manifested that critical flaws of NCA and LMO can be compromised by blending with each other in a critical ratio. In this way, NCA can be practically used in soft-packed battery.
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Yuan, C., Wu, C., Zhang, Z. et al. Evaluation of LiMn2O4-LiNi0.80Co0.15Al0.05O2 hybrid material as cathode in soft-packed lithium ion battery. Ionics 23, 567–574 (2017). https://doi.org/10.1007/s11581-016-1850-7
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DOI: https://doi.org/10.1007/s11581-016-1850-7