Mixed metal or transition metal oxides hold an unveiled potential as one of the most promising energy storage material because of their excellent stability, reliable conductivity, and convenient use. In this work, CuMnO₂ nanoparticles are successfully prepared by a facile hydrothermal process with the help of dispersing agent cetyltrimethylammonium bromide (CTAB). CuMnO₂ nanoparticles possess a uniform quadrilateral shape, small size (approximately 25 × 25 nm–35 × 35 nm), excellent dispersity, and large specific surface specific (56.9 m² g⁻¹) with an interparticle mesoporous structure. All these characteristics can bring benefit for their application in supercapacitor. A quasi-solid-state symmetric supercapacitor device is assembled by using CuMnO₂ nanoparticles as both positive electrode and negative electrode. The device exhibits good supercapacitive performance with a high specific capacitance (272 F g⁻¹), a maximum power density of 7.56 kW kg⁻¹ and a superior cycling stability of 18,000 continuous cycles, indicating an excellent potential to be used in energy storage device.

中文翻译：

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基于CuMnO2纳米粒子的高性能准固态超级电容器

混合金属或过渡金属氧化物具有极好的稳定性，可靠的导电性和方便使用的潜力，是最有前途的储能材料之一。在这项工作中，借助于分散剂鲸蜡基三甲基溴化铵（CTAB），通过简便的水热工艺成功制备了CuMnO ₂纳米颗粒。CuMnO ₂纳米颗粒具有均匀的四边形形状，小尺寸（约25×25 nm–35×35 nm），优异的分散性和较大的比表面积（56.9 m ² g ^-1））具有颗粒间介孔结构。所有这些特性可以为其在超级电容器中的应用带来好处。通过使用CuMnO ₂纳米粒子作为正电极和负电极组装准固态对称超级电容器装置。该器件具有良好的超级电容性能，具有较高的比电容（272 F g ^-1），最大功率密度为7.56 kW kg ^-1和18,000个连续循环的优异循环稳定性，表明该装置在储能装置中具有出色的潜力。