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Fabrication of a 1D Mn3O4 nano-rod electrode for aqueous asymmetric supercapacitors and capacitive deionization†
Inorganic Chemistry Frontiers ( IF 7 ) Pub Date : 2018-10-27 00:00:00 , DOI: 10.1039/c8qi00993g
Hao Zhang 1, 2, 3, 4, 5 , Dun Liu 1, 2, 3, 4 , Yuquan Wei 1, 2, 3, 4, 5 , Aiyang Li 1, 2, 3, 4, 5 , Bo Liu 1, 2, 3, 4, 5 , Ying Yuan 1, 2, 3, 4, 5 , Haichuan Zhang 1, 2, 3, 4, 5 , Guanghe Li 1, 2, 3, 4, 5 , Fang Zhang 1, 2, 3, 4, 5
Affiliation  

One-dimensional manganese oxide presents distinctly stable properties and exhibits excellent electrochemical performance in neutral aqueous solution as a supercapacitor. Here, we successfully prepare a variety of Mn3O4 nano-rods with different micro-morphologies and nano-structures and show that 107.5 nm Mn3O4 long-rod electrodes exhibit a high specific capacitance of 136.5 F g−1 at a current density of 0.1 A g−1. An aqueous asymmetric supercapacitor device with a maximum work voltage of 1.8 V and high power density is fabricated by using Mn3O4 long-rods as the positive electrode and reduced graphene oxide as the negative electrode. Moreover, this asymmetric capacitor device displays a remarkable electro-adsorption performance, with a mean rate of 0.90 mg g−1 min−1 of Na2SO4 solution and an initial concentration of 500 mg L−1, for capacitive deionization. Furthermore, during the desorption processes, waste energy can power one red LED indicator efficiently for at least 5 min, realizing effective energy re-utilization.

中文翻译:

用于水不对称超级电容器和电容去离子 的一维Mn 3 O 4纳米棒电极的制造

一维氧化锰表现出明显的稳定性能,并且在中性水溶液中作为超级电容器表现出优异的电化学性能。在这里,我们成功地制备了各种的Mn 3 ö 4纳米棒具有不同的微形貌和纳米结构和显示,107.5纳米的Mn 3 ö 4长杆电极表现出136.5 F G高的比电容-1以电流密度为0.1 A g -1。通过使用Mn 3 O 4制造最大工作电压为1.8 V且功率密度高的水性不对称超级电容器器件长棒为正极,还原氧化石墨烯为负极。此外,该非对称电容器器件显示出显着的电吸附性能,用于电容性去离子的平均速率为0.90 mg g -1 min -1的Na 2 SO 4溶液和初始浓度为500 mg L -1。此外,在解吸过程中,废能源可以为一个红色LED指示灯有效地供电至少5分钟,从而实现了有效的能源再利用。
更新日期:2018-10-27
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