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Submicron peanut-like MnCO3 as an anode material for lithium ion batteries

机译:亚微米类花生状MnCO3作为锂离子电池的负极材料

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Submicron peanut-like MnCO3 is prepared by a facile homogeneous precipitation and delivers better electrochemical performance as an anode material for lithium ion battery. The physical characterization reveals that the peanut-like MnCO3 is composed of irregular nanoparticles, which results in a large surface area. As a contrast, square MnCO3 is obtained with structural directing agents. Submicron peanut-like MnCO3 delivers a reversible specific capacity of 700 mA h g(-1) at 233 mA g(-1) (1C = 466 mA g(-1)) after 140 cycles. The discharge capacities at 46, 93, 233, 466, 932, and 2330 mA g(-1) are 1047, 1038, 881, 843, 750 and 410 mA h g(-1), respectively, and a recovery capacity of 1100 mA h g(-1) after 60 cycles could still be obtained. It also displays a discharge capacity of 618 mA h g(-1) at high current density of 932 mA g(-1) after 80 cycles. The advanced performance can be attributed to the unique morphology, facile electron and Li+ transportation at the electrode/electrolyte interface and self-accommodation of the large volume change during discharge/charge.
机译:亚微米级的花生状MnCO3是通过容易的均匀沉淀法制备的,具有更好的电化学性能,可作为锂离子电池的负极材料。物理特征表明,花生样MnCO3由不规则的纳米颗粒组成,导致较大的表面积。相比之下,用结构导向剂可得到方形MnCO3。 140周期后,亚微米花生样MnCO3在233 mA g(-1)(1C = 466 mA g(-1))时可逆比容量为700 mA h g(-1)。 46、93、233、466、932和2330 mA g(-1)的放电容量分别为1047、1038、881、843、750和410 mA hg(-1),恢复容量为1100 mA在60个循环后仍可获得hg(-1)。在80个循环之后,它在932 mA g(-1)的高电流密度下也显示出618 mA h g(-1)的放电容量。先进的性能可归因于独特的形态,电极/电解质界面处的便捷电子和Li +传输以及放电/充电过程中大体积变化的自适应性。

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