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Improved Electrochemical Performance of Fe3O4 Nanoparticles Decorated Activated Carbon Supercapacitor Electrodes
Bulletin of the Korean Chemical Society ( IF 2.3 ) Pub Date : 2020-08-03 , DOI: 10.1002/bkcs.12078
Seungil Park 1 , Chellan Justin Raj 1 , Ramu Manikandan 2 , Byung Chul Kim 2 , Kook Hyun Yu 1
Affiliation  

Metal oxide decorated activated carbon (AC) composites exhibit excellent electrochemical property and which is potential for energy storage and catalytic applications. Here, we report the synthesis of iron oxide (Fe3O4) anchored AC composite for supercapacitor (SC) electrode. The citrate‐stabilized Fe3O4 aqueous dispersion (5 mg/mL) of various concentration was utilized for the functionalization of commercial AC and the sample prepared using 50 mL Fe3O4 aqueous dispersion in 2 g of AC (AC‐50Fe) displayed better surface morphology with comparable surface area and porosity. Moreover, the sample AC‐50Fe showed excellent electrochemical performance with a maximum specific capacitance value 131 Fg−1 and cyclic stability ∼105% after 10 000 charge/discharge cycles, which is much higher than the bare AC (77 Fg−1) and AC‐25Fe (91 Fg−1) electrodes. Thus, the optimum amount of Fe3O4 in AC can effectively enhance the SC performance of the electrode by supplying additional pseudocapacitance along with the electric double‐layer capacitance of AC.

中文翻译:

Fe3O4纳米粒子修饰活性炭超级电容器电极的电化学性能改善

装饰有金属氧化物的活性炭(AC)复合材料具有出色的电化学性能,在储能和催化应用方面具有潜力。在这里,我们报告了用于超级电容器(SC)电极的氧化铁(Fe 3 O 4)锚定AC复合材料的合成。各种浓度的柠檬酸盐稳定的Fe 3 O 4水性分散液(5 mg / mL)用于商业AC的功能化,并使用50 mL Fe 3 O 4制备样品2 g AC(AC-50Fe)中的水分散体显示出更好的表面形态,具有可比的表面积和孔隙率。此外,样品AC-50Fe表现出出色的电化学性能,在10 000次充/放电循环后,最大比电容值为131 Fg -1,循环稳定性约为105%,远高于裸AC(77 Fg -1)和AC-25Fe(91 Fg -1)电极。因此,AC中的Fe 3 O 4的最佳含量可通过提供附加的伪电容以及AC的双电层电容来有效地增强电极的SC性能。
更新日期:2020-08-03
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