Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
Nanoscale. 2018 Aug 30;10(34):15926-15931. doi: 10.1039/c8nr04541k.
Monodisperse spherical MnO nanocrystals (NCs) with a size of 22.5 nm were synthesized by the thermal decomposition of manganese oleate in the presence of oleic acid and 1-octadecene. The as-synthesized MnO NCs show superior electrochemical performances with a specific capacitance of 736.4 F g-1 at a current density of 1 A g-1 and retain 93.3% of initial specific capacitance after 5000 cycles. The MnO NC electrode was successfully assembled in an asymmetric supercapacitor as the cathode with an activated carbon (AC) electrode as the anode. The as-fabricated device can demonstrate remarkable performance with an energy density of 44.2 W h kg-1, a power density of 900 W kg-1, and excellent cycling stability. This work provides a new direction for MnO nanomaterials towards high-performance energy storage devices.
通过油酸和 1-十八烯存在下，热分解油酸锰合成了具有 22.5nm 尺寸的单分散球形 MnO 纳米晶（NCs）。所合成的 MnO NCs 表现出优异的电化学性能，在 1A g-1 的电流密度下具有 736.4F g-1 的比电容，经过 5000 次循环后仍保持初始比电容的 93.3%。MnO NC 电极成功地组装在作为正极的活性炭（AC）电极作为负极的非对称超级电容器中。所制备的器件具有 44.2Whkg-1 的能量密度、900Wkg-1 的功率密度和优异的循环稳定性，表现出显著的性能。这项工作为 MnO 纳米材料在高性能储能器件方面提供了新的方向。
