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- W2520028029 abstract "The poor high-rate dischargeability (HRD) of negative electrode materials (hydrogen storage alloys) has impeded applications of nickel metal hydride batteries in high-power fields, electric vehicles, hydride electric vehicles, power tools, modern military devices, etc. Here we report a facile and effective strategy to enhance the HRD performance of commercial MmNi3.55Co0.75Mn0.4Al0.3 hydrogen storage alloy (here Mm denotes mischmetals) with high-energy ball milling and addition of graphene nanoplatelets (GNPs). At a discharge current density of 3000 mA g−1, the capacity retention rate of the alloy electrode could reach 53.0% after ball-milling, and 68.3% after further addition of GNPs, which is 3.2 times that of original alloy electrode (21.5%). Such a superior HRD performance is contributed by (1) smaller particle size of alloys to reduce the diffusion distance of hydrogen atoms; (2) high conductivity of GNPs to accelerate the charge transfer; and (3) interconnected GNPs among alloys to decrease the internal resistance." @default.
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- W2520028029 date "2017-02-01" @default.
- W2520028029 modified "2023-10-02" @default.
- W2520028029 title "Enhanced high-rate performance of ball-milled MmNi3.55Co0.75Mn0.4Al0.3 hydrogen storage alloys with graphene nanoplatelets" @default.
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- W2520028029 doi "https://doi.org/10.1016/j.jallcom.2016.09.157" @default.
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