Jang Wooree, Jeon Dae-Young, Lee Youn-Sik, Koo Hye Young
Functional Composite Materials Research Center, Korea Institute of Science and Technology (KIST) Jeonbuk Institute of Advanced Composite Materials, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, Korea.
School of Chemical Engineering, Chonbuk National University, Jeon-ju, Jeollabuk-do 54896, Korea.
Materials (Basel). 2019 Apr 16;12(8):1245. doi: 10.3390/ma12081245.
One-pot synthesis of mixed-valence manganese oxide (MnO)/potassium ion-doped reduced graphene oxide (rGO) composites for efficient electrochemical supercapacitors is introduced. Using manganese nitrate and potassium permanganate as co-precursors for the MnO and by directly annealing the rGO without tedious purification steps, as described herein, MnO/rGO composites with a high specific capacitance of 1955.6 F g at a current density of 1 A g are achieved. It is found that the presence of potassium ions helps in the development of mixed-valence MnO on the surface of the rGO.
介绍了一种一锅法合成用于高效电化学超级电容器的混合价态氧化锰（MnO）/钾离子掺杂还原氧化石墨烯（rGO）复合材料。如本文所述，使用硝酸锰和高锰酸钾作为MnO的共前驱体，并通过直接对rGO进行退火而无需繁琐的纯化步骤，在电流密度为1 A g时实现了具有1955.6 F g高比电容的MnO/rGO复合材料。研究发现，钾离子的存在有助于在rGO表面形成混合价态的MnO。
