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One-step direct fabrication of manganese oxide electrodes by low-temperature thermal decomposition of manganese formate-amine ink for supercapacitors
Materials Science and Engineering: B ( IF 3.6 ) Pub Date : 2020-09-07 , DOI: 10.1016/j.mseb.2020.114754
Akihiro Yabuki , Yuki Matsuo , Soonchul Kang , Indra Wahyudhin Fathona

A one-step direct fabrication of thin-film manganese oxide electrodes was accomplished via low-temperature thermal decomposition of inks composed of manganese formate (Mnf), alkylamines, and hexanol. As complexing agents, amines were used in molar ratios of Mnf:amine that ranged from 1:1 to 1:4. Prepared inks were directly coated onto the substrate, and then calcined at 170–210 °C under air. Cyclic voltammetry and charge/discharge measurements of the thin films were conducted in an electrolyte solution. Following immersion, the specific capacitance of the electrodes increased and eventually reached a constant value. Based on the results of cyclic voltammetry (CV) at 1 mV s−1, a thin-film electrode fabricated at 180 °C from Mnf-octylamine-hexanol ink at a molar ratio of 1:3:0.5 had the highest level of specific capacitance at 400 F g−1. CV measurement at 1000 cycles revealed a deterioration of specific capacitance of only 5%, which indicates good stability for this thin-film electrode.



中文翻译:

超级电容器用甲酸锰胺油墨的低温热分解一步一步直接制备氧化锰电极

通过对由甲酸锰(Mnf),烷基胺和己醇组成的油墨进行低温热分解,可以一步一步直接制造薄膜氧化锰电极。作为络合剂,以Mnf∶胺的摩尔比在1∶1至1∶4范围内使用胺。将准备好的油墨直接涂在基材上,然后在空气中于170–210°C下煅烧。在电解质溶液中进行薄膜的循环伏安法和充电/放电测量。浸没后,电极的比电容增加,最终达到恒定值。基于1 mV s -1下的循环伏安法(CV)的结果,在180℃下由Mnf-辛胺-己醇油墨以1:3:0.5的摩尔比制成的薄膜电极在400 F g -1下具有最高的比电容水平。在1000次循环中的CV测量表明,比电容仅下降5%,这表明该薄膜电极具有良好的稳定性。

更新日期:2020-09-08
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