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Preparation of a fusiform shape MnO/C composite as anode materials for lithium-ion batteries

机译:纺锤形MnO / C复合材料作为锂离子电池负极材料的制备

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摘要

Fusiform shape MnO/C composite was fabricated for the first time by heat calcining of MnCO~(3)/C precursor, which was produced via a two-step hydrothermal method using glycine, KMnO~(4)and glucose as reagents. When the composite applied in LIBs as anode materials, the electrodes deliver a reversible capacity as high as 691 mA h g_(−1)after 120 cycles at a current density of 100 mA g_(−1)and can retain a stable capacity of 187 mA h g_(−1)at 1000 mA g_(−1). Compared with pure MnO particles sample, the enhanced electrochemical performances of MnO/C electrodes were attributed to the carbon layers can effectively improve the transfer rate of electrons and buffer the volume expansion of MnO particles during the charge/discharge process.
机译:通过对甘氨酸,KMnO〜(4)和葡萄糖为两步水热法制备的MnCO〜(3)/ C前驱体进行热煅烧,首次制备出梭形MnO / C复合材料。当将复合材料作为负极材料应用于LIB中时,电极在120次循环后以100 mA g _(-1)的电流密度提供高达691 mA h g _(-1)的可逆容量,并可以保持187的稳定容量在1000 mA g _(-1)下的mA h g _(-1)。与纯MnO颗粒样品相比,MnO / C电极增强的电化学性能归因于碳层可以有效提高电子的传输速率,并在充电/放电过程中缓冲MnO颗粒的体积膨胀。

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