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Carbon microspheres air electrode for rechargeable Li-O-2 batteries

机译:用于可充电LI-O-2电池的碳微球空气电极

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摘要

Carbon microspheres (CMs) were synthesized by a reflux-calcination method and showed a large BET surface area of 626.919 m(2) g(-1), a typical micropore structure and good electrochemical properties. The CMs which were employed as an air cathode without the addition of any metal particles, not only provided reaction sites but also acted as a cathode carbon support in the non-aqueous system of Li-O-2 batteries. An initial discharge capacity of 12 081.0 mA h g(-1) could be obtained at 200 mA g(-1). Little capacity loss was shown after 20 full discharge-charge cycles under a current density of 300 mA g(-1). 60 cycles of continuous discharge and charge were achieved with no capacity loss with a cut-off capacity of 1000 mA h g(-1), at 200 mA g(-1). The reversible formation is clearly revealed by the CV curves.
机译:通过回流煅烧方法合成碳微球(CMS),显示出大的BET表面积为626.919m(2)g(-1),典型的微孔结构和良好的电化学性能。 用于在不添加任何金属颗粒的情况下用作空气阴极的CMS,不仅提供了反应位点,而且还提供了Li-O-2电池的非水体系中的阴极碳载体。 可以在200mA g(-1)下获得12 081.0mA H g(-1)的初始放电容量。 在电流密度为300mA g(-1)的情况下,在20个完全放电充电循环后显示了很少的容量损失。 实现了60个连续放电和电荷的循环,没有容量损失,截止容量为1000mA H(-1),在200mA g(-1)。 CV曲线清楚地揭示了可逆形成。

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