层状 MgAlO/还原氧化石墨烯复合材料的非对称超级电容器的循环性能。
Cycling profile of layered MgAlO/reduced graphene oxide composite for asymmetrical supercapacitor.
机构信息
College of Science and Technology, Xinyang College, Xinyang 464000, China.
College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China.
出版信息
J Colloid Interface Sci. 2019 Mar 15;539:38-44. doi: 10.1016/j.jcis.2018.12.045. Epub 2018 Dec 12.
To improve the ineluctable agglomeration and weak inherent conductivity of MgAlO electrode materials, MgAlO/rGO composite is synthesized by a facile method and it shows large specific surface area and enhanced conductivity. Its particular framework can availably hold back the aggregation of MgAlO and restacking of rGO, and accelerate reversible redox reactions. The MgAlO/rGO composite shows a specific capacity of 536.6 F/g at 1 A/g (257.3 F/g at 40 A/g) and retains 96.9% after 10,000 cycles at 5 A/g. An asymmetric supercapacitor is developed with MgAlO/rGO composite and activated carbon. An energy density of 16.2 Wh/kg is obtained at a power density of 400 kW/kg. Additionally, this device has successfully lighted up a LED, demonstrating its promising application in energy storage.
为了改善 MgAlO 电极材料不可避免的团聚和较弱的固有导电性，通过简便的方法合成了 MgAlO/rGO 复合材料，其具有较大的比表面积和增强的导电性。其特殊的骨架可以有效地阻止 MgAlO 的聚集和 rGO 的堆积，并加速可逆的氧化还原反应。MgAlO/rGO 复合材料在 1 A/g（40 A/g 时为 257.3 F/g）时具有 536.6 F/g 的比容量，在 5 A/g 下循环 10000 次后保持 96.9%。使用 MgAlO/rGO 复合材料和活性炭开发了一种非对称超级电容器。在功率密度为 400 kW/kg 时，获得了 16.2 Wh/kg 的能量密度。此外，该装置成功点亮了一个 LED，展示了其在储能方面的应用前景。
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