Journal ArticleDOI
One-Pot Synthesis of Fe2O3 Nanoparticles on Nitrogen-Doped Graphene as Advanced Supercapacitor Electrode Materials
TLDR
In this article, a facial one-pot hydrothermal method was used to load Fe2O3 supported on nitrogen-doped graphene hydrogel and obtain a specific capacitance as high as 618 F g/1 at discharge current density of 0.5 A g/g/1.Abstract:
Fe2O3 supported on nitrogen-doped graphene (Fe2O3/N-rGO) hydrogel was prepared by a facial one-pot hydrothermal method. The efficient Fe2O3 loading and nitrogen doping of graphene was realized with this method. The morphology and structure of the samples were characterized by scanning electron microscopy, high-resolution transmission electron microscopy, thermal gravimetric analysis, Raman spectra, X-ray diffraction, and nitrogen isothermal adsorption–desorption. The chemical environment of the surface composition of the samples was recorded by X-ray photoelectron spectroscopy. The electrochemical performance was tested with a three-electrode system in the aqueous electrolyte of 1 M KOH. The electrochemical measurement demonstrated that Fe2O3/N-rGO shows a specific capacitance as high as 618 F g–1 at a discharge current density of 0.5 A g–1. Even at the current density of 10 A g–1, the specific capacitance is still as high as 350 F g–1. After 5000 cycles, the capacity retention is still maintained at 56.7%.read more
Citations
More filters
Journal ArticleDOI
Recent advancements in supercapacitor technology
Waseem Raza,Faizan Ali,Nadeem Raza,Yiwei Luo,Ki-Hyun Kim,Jianhua Yang,Sandeep Kumar,Andleeb Mehmood,Eilhann E. Kwon +8 more
TL;DR: In this article, a review of recent advances in supercapacitor (SC) technology with respect to charge storage mechanisms, electrode materials, electrolytes (e.g., particularly paper/fiber-like 3D porous structures), and their practical applications is presented.
Journal ArticleDOI
Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications
Mujeeb Khan,Muhammad Nawaz Tahir,Syed Farooq Adil,Hadayat Ullah Khan,M. Rafiq H. Siddiqui,Abdulrahman Al-Warthan,Wolfgang Tremel +6 more
TL;DR: In this article, the authors discuss the current development of graphene-based metal and metal oxide nanocomposites, with a detailed account of their synthesis and properties, including their applications in various fields including electronics, electrochemical and electrical fields.
Journal ArticleDOI
Advanced Ti-Doped Fe2O3@PEDOT Core/Shell Anode for High-Energy Asymmetric Supercapacitors
Yinxiang Zeng,Yi Han,Yitong Zhao,Yan Zeng,Minghao Yu,Yongjiang Liu,Haolin Tang,Yexiang Tong,Xihong Lu +8 more
TL;DR: Y. X. Zeng, Y. T. Zhao, M. H. Yu, Y J. Liu, Prof. Y X. Tong, Dr. R. Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology WuhAN 430070, P.
Journal ArticleDOI
Heteroatom doped graphene engineering for energy storage and conversion
Rajesh Kumar,Sumanta Sahoo,Ednan Joanni,Rajesh Kumar Singh,Keiichiro Maegawa,Wai Kian Tan,Go Kawamura,Kamal K. Kar,Atsunori Matsuda +8 more
TL;DR: In this article, the most recent research works on the synthesis of heteroatom-doped graphene materials such as reduced graphene oxide, graphene oxide and graphene nanoribbons are surveyed.
Journal ArticleDOI
Iron-Based Supercapacitor Electrodes: Advances and Challenges
TL;DR: In this article, recent research advances in the rational design and synthesis of diverse Fe-based nanostructured electrodes and their capacitive performance for supercapacitors are presented, besides, challenges and prospects of Febased materials as advanced negative electrodes for SCs are also discussed.
References
More filters
Journal ArticleDOI
A review of electrode materials for electrochemical supercapacitors
TL;DR: Two important future research directions are indicated and summarized, based on results published in the literature: the development of composite and nanostructured ES materials to overcome the major challenge posed by the low energy density.
Journal ArticleDOI
Analysis of XPS spectra of Fe2+ and Fe3+ ions in oxide materials
Toru Yamashita,Peter C. Hayes +1 more
TL;DR: In this paper, the peak positions and peak shape parameters of Fe 3p for Fe2+ and Fe3+ were derived from the XPS spectra of the standard samples of 2FeO·SiO2 and Fe2O3, respectively.
Journal ArticleDOI
Longitudinal unzipping of carbon nanotubes to form graphene nanoribbons
Dmitry V. Kosynkin,Amanda L. Higginbotham,Alexander Sinitskii,Jay R. Lomeda,Ayrat M. Dimiev,B. Katherine Price,James M. Tour +6 more
TL;DR: A simple solution-based oxidative process for producing a nearly 100% yield of nanoribbon structures by lengthwise cutting and unravelling of multiwalled carbon nanotube (MWCNT) side walls is described.
Journal ArticleDOI
Facile synthesis and characterization of graphene nanosheets
TL;DR: Graphene nanosheets were produced in large quantity via a soft chemistry synthetic route involving graphite oxidation, ultrasonic exfoliation, and chemical reduction in this paper.
Journal ArticleDOI
Relation between the ion size and pore size for an electric double-layer capacitor.
Celine Largeot,Cristelle Portet,John Chmiola,Pierre-Louis Taberna,Yury Gogotsi,Patrice Simon +5 more
TL;DR: A general approach to EDLC design leading to the maximum energy density is suggested, which has been now proved for both solvated organic salts and solvent-free liquid electrolytes.