SCHEDULED MAINTENANCE
Submicron peanut-like MnCO3 as an anode material for lithium ion batteries
Abstract
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.
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