Nanostructured carbon–metal oxide composite electrodes for supercapacitors: a review

Herein we use Nitrogen-doped reduced Graphene Oxide (N-rGO) as the active material in supercapacitor electrodes. Building on a previous work detailing the synthesis of this material, electrodes were fabricated via spray-deposition of aqueous dispersions and the electrochemical charge storage mechanism was investigated. Results indicate that the functionalised graphene displays improved performance compared to non-functionalised graphene. The simplicity of fabrication suggests ease of up-scaling of such electrodes for commercial applications.

Download options Please wait... Article information DOI https://doi.org/10.1039/TF9696502235 Article type Paper Download Citation Trans. Faraday Soc., 1969,65, 2235-2247 BibTex EndNote MEDLINE ProCite ReferenceManager RefWorks RIS Permissions Request permissions Oxidation of metals and alloys. Part 2.—Oxidation of metals by atomic and molecular oxygen P. G. Dickens, R. Heckingbottom and J. W. Linnett, Trans. Faraday Soc., 1969, 65, 2235 DOI: 10.1039/TF9696502235 To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page. If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given. If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page. Read more about how to correctly acknowledge RSC content. Search articles by author P. G. Dickens R. Heckingbottom J. W. Linnett

A method for producing nanocomposites of transition metal oxides A(3)O(4) (where A represents Mn, Fe or Co) and graphene nanosheets (GNS) is presented. The reduction of graphene oxide (GO) and the formation of A(3)O(4) nanoparticles (NPs) were carried out simultaneously during the reaction. The electrochemical properties of A(3)O(4)-GNS nanocomposites as electrode materials for supercapacitors are investigated by cyclic voltammetry and galvanostatic charge-discharge tests. The as-prepared Mn(3)O(4)-GNS, Fe(3)O(4)-GNS and Co(3)O(4)-GNS nanocomposites exhibit large specific capacitance (708, 358 and 240 F g(-1), respectively), high energy density (20, 10 and 7 W h kg(-1), respectively) and good electrochemical stability (retention of 73%, 67.8% and 95.8%, respectively, after 1000 charge-discharge cycles). The excellent electrochemical performance of the A(3)O(4)-graphene nanocomposites indicates great potential in the application in commercial supercapacitors.

A novel method for the deposition of RuO(2) from RuO(4)(g) on diverse metal oxides has been developed by grafting dopamine onto the otherwise un-reactive metal oxide surface. Oxygen evolution reaction on TiO(2) and the photoelectrochemical improvement of WO(3) by deposition of RuO(2) are just a few examples where this novel deposition method can be used.

Download options Please wait... Article information DOI https://doi.org/10.1039/DT9730000470 Article type Paper Download Citation J. Chem. Soc., Dalton Trans., 1973, 470-474 BibTex EndNote MEDLINE ProCite ReferenceManager RefWorks RIS Permissions Request permissions Surface oxidation of uranium metal as studied by X-ray photoelectron spectroscopy G. C. Allen and P. M. Tucker, J. Chem. Soc., Dalton Trans., 1973, 470 DOI: 10.1039/DT9730000470 To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page. If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given. If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page. Read more about how to correctly acknowledge RSC content. Search articles by author G. C. Allen P. M. Tucker

Download options Please wait... Supplementary files Supplementary information PDF (6862K) Crystal structure data TXT (16K) Article information DOI https://doi.org/10.1039/C3GC40520F Article type Paper Submitted 19 Mar 2013 Accepted 03 Jun 2013 First published 03 Jun 2013 Download Citation Green Chem., 2013,15, 2121-2131 BibTex EndNote MEDLINE ProCite ReferenceManager RefWorks RIS Permissions Request permissions Mineral neogenesis as an inspiration for mild, solvent-free synthesis of bulk microporous metal–organic frameworks from metal (Zn, Co) oxides C. Mottillo, Y. Lu, M. Pham, M. J. Cliffe, T. Do and T. Friščić, Green Chem., 2013, 15, 2121 DOI: 10.1039/C3GC40520F To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page. If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given. If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page. Read more about how to correctly acknowledge RSC content. Social activity Tweet Share Search articles by author Cristina Mottillo Yuneng Lu Minh-Hao Pham Matthew J. Cliffe Trong-On Do Tomislav Friščić

An analysis is presented of the thermodynamics of both isothermal and isobaric hysteresis, leading to equations for the calculation of the irreversible entropy production and the loss of free energy in hysteresis cycles of both kinds. The status of 'apparent' enthalpies derived from the temperature dependence of isothermal data is examined and two extreme types of behaviour are identified. An analysis of experimental data shows that the palladium–hydrogen system exhibits characteristics lying between these extremes. However, this does not seriously affect the use of either isothermal or isobaric data to derive the entropy production and free-energy loss. Existing published work on rare-earth metal–oxygen systems is also analysed, but no firm conclusions can be drawn.

Download options Please wait... Supplementary files Supplementary information PDF (617K) Article information DOI https://doi.org/10.1039/C3TA13513F Article type Paper Submitted 04 Sep 2013 Accepted 22 Oct 2013 First published 22 Oct 2013 Download Citation J. Mater. Chem. A, 2014,2, 813-823 BibTex EndNote MEDLINE ProCite ReferenceManager RefWorks RIS Permissions Request permissions Facile fabrication of three-dimensional highly ordered structural polyaniline–graphene bulk hybrid materials for high performance supercapacitor electrodes Y. Liu, Y. Ma, S. Guang, H. Xu and X. Su, J. Mater. Chem. A, 2014, 2, 813 DOI: 10.1039/C3TA13513F To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page. If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given. If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page. Read more about how to correctly acknowledge RSC content. Social activity Tweet Share Search articles by author Yu Liu Yu Ma Shanyi Guang Hongyao Xu Xinyan Su

Arrays of multi-segmented hybrid nanostructures of carbon nanotube and gold nanowires have been synthesized using a combination of chemical vapour deposition and electrodeposition methods and we further demonstrate that ultra-high power electrochemical double layer capacitors can be engineered using these hybrid nanowires, resulting in very high power densities.

Recent developments in task specifically functionalized imidazolium salts, which can be used for specific tasks ranging from catalysts recycling, supports for organic synthesis, catalysis, separation of specific metal ions from aqueous solution, and construction of nanostructures and ion conductive materials, have been reviewed.

The present paper aims at extracting key physical and chemical concepts for the development of inorganic nanomaterials with controlled size, shape, and topology. In particular, efforts are made to identify general guiding principles for the rational design of 0D, 1D, 2D and 3D architectures, focusing on selected model systems as representative case studies. To this aim, different strategies and approaches are discussed, in an attempt to unify concepts and ideas common to solid-, liquid- and gas-phase synthetic routes. Furthermore, the importance of tailoring the nanomaterial composition, structure and morphology is also highlighted in relation to their eventual technological applications.

This article reviews the recent progress made in asymmetric catalysis in the nanopores of mesoporous materials and periodic mesoporous organosilicas (PMOs). Some examples of chiral catalysts within the nanopores show improved catalytic performance compared to homogeneous catalysts. The factors including the confinement effect, the properties of the linkages and the microenvironment in nanopores, which affect the activity and enantioselectivity of asymmetric catalysis in nanopores, are discussed.

The need to decipher various biological events has led to the elucidation of the molecular mechanisms underlying a number of disease processes. Consequently, the detection and simultaneous monitoring of chemical interactions between biological targets has become indispensable in medical diagnosis, targeted therapeutics, and molecular biology. Multiplexed applications employing nanomaterials, which represent the integration of nanotechnology and biology, have changed the bioanalytical outlook and provided various promising tools. Among these nanomaterials, fluorescent dye-doped silica nanoparticles have demonstrated excellent potential for use in advanced bioanalysis to facilitate deeper understanding of biology and medicine at the molecular level. In particular, silica nanoparticles have been applied to diagnostics and therapeutic applications in cancer and gene/drug delivery. This feature article summarizes recent developments in the synthesis, biocompatibility, and bioapplications of fluorescent dye-doped silica nanoparticles.

Dendrimers are highly branched macromolecules which may engage in host-guest interactions, acting as either hosts or guests; this review is specifically concerned with the binding behavior of dendrimers containing single or multiple guest residues interacting with individual, freely diffusing hosts.

This Feature Article focuses on the recent advances in synthesis of nanostructured carbon materials using microwave irradiation as the heating source. Although the microwave approach to chemical synthesis is relatively mature in organic synthesis, it is still in the early stage for nanomaterials synthesis, especially nanocarbons. Due to the energy efficient nature of microwave heating, there is a great opportunity to apply microwave irradiation to nanocarbon production, which normally requires high temperature, high vacuum or inert gas protections. Using microwave irradiation will give a green feature to the nanocarbon synthesis, since it offers high efficiency heating and fast carbonization. With our recent discovery, multi-walled carbon nanotubes can be synthesized through the microwave process even in air. Background about nanocarbons and microwave chemistry are introduced, the application of microwaves in synthesis of different types of nanocarbons is discussed and finally, the perspectives in the future research directions of microwave assisted nanocarbon synthesis are deliberated as well.