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- W2149245845 abstract "Lithium ion batteries are receiving enormous attention as power sources and energy storage devices in the renewable energy field. With the ever increasing demand for higher energy and power density, high voltage cathodes have emerged as an important option for new generation batteries. Here, we report graphene-oxide-coated LiNi0.5Mn1.5O4 as a high voltage cathode and demonstrate that the batteries showed superior cycling performance for up to 1000 cycles. Mildly oxidized graphene oxide coating was found to improve the battery performance by enhancing the conductivity and protecting the cathode surface from undesired reactions with the electrolyte. As a result, the graphene-oxide-coated high voltage cathode LiNi0.5Mn1.5O4 showed 61% capacity retention after 1000 cycles in the cycling test, which converts to only 0.039% capacity decay per cycle. At large current rates of 5 C, 7 C and 10 C, the batteries were able to deliver 77%, 66% and 56% of the 1 C capacity, respectively (1 C = 140 mA g−1). In contrast, the LiNi0.5Mn1.5O4 cathode without graphene oxide coating showed 88.7% capacity retention after only 100 cycles. The promising results demonstrated the potential of developing high energy density batteries with the high voltage cathode LiNi0.5Mn1.5O4 and improving the battery performance by surface modification with mildly oxidized graphene oxide." @default.
- W2149245845 created "2016-06-24" @default.
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- W2149245845 date "2013-01-01" @default.
- W2149245845 modified "2023-10-11" @default.
- W2149245845 title "Graphene-oxide-coated LiNi0.5Mn1.5O4 as high voltage cathode for lithium ion batteries with high energy density and long cycle life" @default.
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- W2149245845 doi "https://doi.org/10.1039/c3ta01534c" @default.
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