Two-Dimensional Planar Supercapacitor Based on Zinc Oxide/Manganese Oxide Core/Shell Nano-architecture

Raj, C. Justin; Rajesh, M.; Manikandan, Ramu; Sim, Ju Yong; Yu, Kook Hyun; Park, Sang Yeup; Song, Jun; Kim, Byung Chul

doi:10.1016/j.electacta.2017.07.009

Cited by 82 publications

(23 citation statements)

References 55 publications

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“…Bu metal oksitlerden biri olan ZnO; ucuz ve çevre dostu bir malzeme olup, optik geçirgenliği ve elektriksel iletkenliği yüksek, optik bant aralığı oda sıcaklığında yaklaşık 3,37 eV değerine sahip olan oldukça önemli bir yarıiletkendir [1,2]. Bu üstün özellikleri nedeniyle de hem teknolojik hem de endüstriyel alanda LED, süperkapasitör, güneş pilleri, sensörler, UV dedektörleri ve alan etkili transistörler gibi çeşitli elektronik aygıt uygulamalarında yaygın olarak kullanılmaktadır [3][4][5][6][7][8].…”

Section: Introductionunclassified

ZnO:Eu Filmlerinin Mikroyapısal ve Optik Özellikleri

Büyük¹,

Ilıcan²

2018

Karadeniz Fen Bilimleri Dergisi

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Evropiyum (Eu) katkılı çinko oksit (ZnO) filmleri, ucuz ve basit bir metot olan sol jel metodu ile elde edilen çözeltiler kullanılarak p-tipi silisyum (p-Si) alttaşlar üzerine spin kaplama tekniği ile büyütülmüştür. Elde edilen ZnO filminin yapısal, morfolojik ve optik özellikleri üzerine Eu katkısının etkisi, sırasıyla X-ışını kırınım cihazı, taramalı elektron mikroskobu ve uv-vis spektrofotometresi kullanılarak araştırılmıştır. Filmlerin XRD spektrumlarından, bütün filmlerin hekzagonal wurtzite zinkit (ZnO) yapıya ait olduğu ve (002) tercihli yönelime sahip olduğu belirlenmiştir. ZnO:Eu filmlerinin çekilen SEM fotoğrafları ImageJ programı ile analiz edilmiştir. Bütün filmlerin yüzeylerinin homojen ve düzgün yapıya sahip olduğu ve nanoparçacıklardan oluştuğu; yapılan Eu katkısının ZnO yüzey morfolojisinde önemli bir değişiklik olmadığı gözlenmiştir. ZnO:Eu filmlerinin diffüz yansıma spektrumları, entegre küre aparatlı UV-vis spektrofotometre yardımıyla ölçülmüştür. Bu spektrumlar kullanılarak filmlerin optik bant aralık değerleri, hem diferansiyel yansıma spektrumları hem de Kubelka-Munk fonksiyonu kullanılarak belirlenmiştir.

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Section: Introductionunclassified

ZnO:Eu Filmlerinin Mikroyapısal ve Optik Özellikleri

Büyük¹,

Ilıcan²

2018

Karadeniz Fen Bilimleri Dergisi

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“…PD600, PD800, and P1000 provided phase-angle values of 75 • , 73 • , and 76 • , respectively, in low-frequency regions. Failure to reach the ideal value of 90 • was mainly due to the presence of pseudocapacitive behavior [55].…”

Section: Electrochemical Behavior Tested In a Three-electrode Systemmentioning

confidence: 99%

Revalorization of Pleurotus djamor Fungus Culture: Fungus-Derived Carbons for Supercapacitor Application

et al. 2021

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Currently, there is increasing interest and effort directed to developing sustainable processes, including in waste management and energy production and storage, among others. In this research, corn cobs were used as a substrate for the cultivation of Pleurotus djamor, a suitable feedstock for the management of these agricultural residues. Revalorization of this fungus, as an environmentally friendly carbon precursor, was executed by taking advantage of the intrinsic characteristics of the fungus, such as its porosity. Obtaining fungus-derived porous carbons was achieved by hydrothermal activation with KOH and subsequent pyrolysis at 600, 800, and 1000 °C in an argon atmosphere. The morphologies of the fungal biomass and fungus-derived carbons both exhibited, on their surfaces, certain amorphous similarities in their pores, indicating that the porous base matrix of the fungus was maintained despite carbonization. From all fungus-derived carbons, PD1000 exhibited the largest superficial area, with 612 m2g−1 and a pore size between 3 and 4 nm recorded. Electrochemical performance was evaluated in a three-electrode cell, and capacitance was calculated by cyclic voltammetry; a capacitance of 60 F g−1 for PD1000 was recorded. Other results suggested that PD1000 had a fast ion-diffusion transfer rate and high electronic conductivity. Ultimately, Pleurotus djamor biomass is a suitable feedstock for obtaining carbon in a sustainable way, and it features a defined intrinsic structure for potential energy storage applications, such as electrodes in supercapacitors.

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“…Metal oxides, especially transition metal oxides, are another major class of electrode materials. Transition metal oxides rely on reversible redox reactions and chemisorption/desorption processes to store charge, with higher specific capacitance, higher energy density, and excellent tantalum capacitor performance . Transition metal oxide electrodes can produce large specific capacitance and high energy density at low sweep speed and low current density .…”

Section: Preparation and Modification Of Mf Carbonmentioning

confidence: 99%

Carbon materials from melamine sponges for supercapacitors and lithium battery electrode materials: A review

et al. 2019

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With the increasing energy demand together with the deteriorating environment and decreasing fossil fuel resources, the development of highly efficient energy conversion and storage devices is one of the key challenges of both fundamental and applied research in energy technology. Melamine sponges (MS) with low density, high nitrogen content, and high porosity have been used to design and obtain three‐dimensional porous carbon electrode materials. More importantly, they are inexpensive, environment‐friendly, and easy to synthesize. There have been many reports on the modification of carbonized MS and MS‐based composites for supercapacitor and lithium battery electrode materials. In this paper, recent studies on the fabrication of electrode materials using MS as raw materials have been mainly reviewed, including carbonation, doping activation, and composite modification of MS, and expectations for the development of porous carbon materials for energy storage as a reference with excellent performance, environment‐friendliness, and long life.

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Two-Dimensional Planar Supercapacitor Based on Zinc Oxide/Manganese Oxide Core/Shell Nano-architecture

Cited by 82 publications

References 55 publications

ZnO:Eu Filmlerinin Mikroyapısal ve Optik Özellikleri

ZnO:Eu Filmlerinin Mikroyapısal ve Optik Özellikleri

Revalorization of Pleurotus djamor Fungus Culture: Fungus-Derived Carbons for Supercapacitor Application

Carbon materials from melamine sponges for supercapacitors and lithium battery electrode materials: A review

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