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- W2565939957 abstract "Spinel-based LiMn2O4 is the most attractive cathode for Li-ion battery due to high voltage, low cost, and non-toxicity. The cycle life of the spinel cathodes could be improved by replacing Mn4+ with Ti4+ leading to the formation of new spinel cathode, LiMnTiO4. However, its application is restricted due to the associated loss in the specific capacity. In this work, spinel-layered Li1+zMnTiO4+δ (z = 0, 0.5, and 1.0; δ is the value to reflect the composite character of the material) cathodes were fabricated to achieve long cycle life, without compromising on the specific capacity. Cathodes with excess Li (z = 0.5 and 1.0) formed a spinel-layered composite structure with notation (1-a)LiMn2-xTixO4.aLi2MnyTi1-yO3 [y = 0.5–((1/a − 1)(1 − x))]. These cathodes exhibited an enhanced specific capacity of ∼218 mAh g−1 (20% higher), with a capacity retention of 94% after 60 cycles. The structural and electrochemical properties of these cathodes were investigated using X-ray diffraction, galvanostatic cycling, cyclic voltammetry, and the galvanostatic intermittent titration technique to understand the mechanisms underlying the enhanced capacity and cycle stability. The effect of the Li-rich layered phase on the electrochemical performance of the Li1+zMnTiO4+δ cathodes was also investigated." @default.
- W2565939957 created "2017-01-06" @default.
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- W2565939957 date "2017-01-01" @default.
- W2565939957 modified "2023-09-23" @default.
- W2565939957 title "Effects of excess Li on the structure and electrochemical performance of Li 1+z MnTiO 4+ δ cathode for Li-ion batteries" @default.
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- W2565939957 doi "https://doi.org/10.1016/j.electacta.2016.12.180" @default.
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