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- W2080588679 abstract "Abstract A post-annealing strategy at 600 °C was used to modify the oxygen deficiency during synthesis of a spinel LiMn 1.45 Cr 0.1 Ni 0.45 O 4 cathode for lithium-ion batteries. Structural analyses revealed that post-annealing is an effective way to eliminate the impurity phase without changing the F d 3 ¯ m space group. The substitution of a small amount of Cr leads to better rate performance along with cyclability at room temperature, compared to the commercial LiMn 1.5 Ni 0.5 O 4 . LiMn 1.45 Cr 0.1 Ni 0.45 O 4 delivered a reversible capacity of ∼115, 104, 95 and 40 mAh g −1 at 0.2C, 1C, 2C and 5C, respectively. While commercial LiMn 1.5 Ni 0.5 O 4 offered a lower reversible capacity of ∼110, 98, 85 and 20 mAh g −1 at the same C rates. After 125 cycles, about 99% of reversible capacity was retained for the LiMn 1.45 Cr 0.1 Ni 0.45 O 4 , while about 6% of capacity loss was obtained after 125 cycles for the commercial LiMn 1.5 Ni 0.5 O 4 . Electrochemical impedance spectroscopy measurements revealed that the LiMn 1.45 Cr 0.1 Ni 0.45 O 4 had a smaller surface resistance, which may be due to the segregation of Ni from the surface to the bulk." @default.
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- W2080588679 date "2012-11-01" @default.
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- W2080588679 title "Synthesis of pure phase disordered LiMn1.45Cr0.1Ni0.45O4 by a post-annealing method" @default.
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- W2080588679 doi "https://doi.org/10.1016/j.jpowsour.2012.06.063" @default.
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