A novel Cr 2 O 3 -carbon composite as a high performance pseudo-capacitor electrode material

Ullah, Shaheed; Khan, Inayat Ali; Choucair, Mohammad; Badshah, Amin; Khan, Ishtiaq; Nadeem, Muhammad Arif

doi:10.1016/j.electacta.2015.04.179

Cited by 70 publications

(26 citation statements)

References 41 publications

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“…Cr 2 O 3 has been widely utilized in pigments, catalysts, refractory coating, hydrogen storage materials, gas sensors, lithium materials, and solar energy due to its excellent chemical and physical properties . The Cr 2 O 3 ‐based electrode materials towards supercapacitive applications were also be focused, but the demands of environmental friendliness limit its further developments. Rhombohedral Cr 2 O 3 in the R

\bar{3}

c structure usually refers to the thermodynamically stable corundum‐structured α phase.…”

Section: D Transition Metal Oxidesmentioning

confidence: 99%

Novel Two‐Dimensional Porous Materials for Electrochemical Energy Storage: A Minireview

Mao

Zhao

Wang

et al. 2020

The Chemical Record

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Two dimensional (2D) porous materials have great potential in electrochemical energy conversion and storage. Over the past five years, our research group has focused on Simple, Mass, Homogeneous and Repeatable Synthesis of various 2D porous materials and their applications for electrochemical energy storage especially for supercapacitors (SCs). During the experimental process, through precisely controlling the experimental parameters, such as reaction species, molar ratio of different ions, concentration, pH value of reaction solution, heating temperature, and reaction time, we have successfully achieved the control of crystal structure, composition, crystallinity, morphology, and size of these 2D porous materials including transition metal oxides (TMOs), transition metal hydroxides (TMHOs), transition metal oxalates (TMOXs), transition metal coordination complexes (TMCCs) and carbon materials, as well as their derivatives and composites. We have also named some of them with CQU‐Chen (CQU is the initialism of Chongqing University, Chen is the last name of Lingyun Chen), such as CQU‐Chen‐Co−O‐1, CQU‐Chen‐Ni−O−H‐1, CQU‐Chen‐Zn−Co−O‐1, CQU‐Chen‐Zn−Co−O‐2, CQU‐Chen‐OA−Co‐2‐1, CQU‐Chen‐Co−OA‐1, CQU‐Chen‐Ni−OA‐1, CQU‐Chen‐Gly−Co‐3‐1, CQU‐Chen‐Gly−Ni‐2‐1, CQU‐Chen‐Gly−Co−Ni‐1, etc. The introduction of 2D porous materials as electrode materials for SCs improves the energy storage performances. These materials provide a large number of active sites for ion adsorption, supply plentiful channels for fast ion transport and boost electrical conductivity and facilitate electron transportation and ion penetration. The unique 2D porous structures review is mainly devoted to the introduction of our contribution in the 2D porous nanostructured materials for SC. Finally, the further directions about the preparation of 2D porous materials and electrochemical energy conversion and storage applications are also included.

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\bar{3}

c structure usually refers to the thermodynamically stable corundum‐structured α phase.…”

Section: D Transition Metal Oxidesmentioning

confidence: 99%

Novel Two‐Dimensional Porous Materials for Electrochemical Energy Storage: A Minireview

Mao

Zhao

Wang

et al. 2020

The Chemical Record

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“…The carbon/NiO nanosheet also exhibited an excellent cycling performance (414 F g −1 at 5 A g −1 ) with 92.2% specific capacitance retention after 3000 cycles. Cr 2 O 3 -carbon composites were synthesis from furfuryl alcohol MIL-101(Cr) mixture by Shaheed Ullah et al 78 MIL-101(Cr) was decomposed into carbon and Cr 2 O 3 , and furfuryl alcohol as primary carbon source. Furfuryl alcohol/MIL-101(Cr) mixture converted to Cr 2 O 3 -graphitic carbon nanocomposite after annealing at 900°C for 6 hours in the air (denote as Cr 2 O 3 /C900).…”

Section: Mof-derived Carbon/metal Oxide Compositesmentioning

confidence: 99%

A review of performance optimization of MOF-derived metal oxide as electrode materials for supercapacitors

et al. 2018

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Summary Metal‐organic frameworks (MOFs), as new class of porous materials, are constructed by inorganic metal centers and bridging organic links. Recently, MOFs have been proved to be effective templates for preparing metal oxides with large surface areas and controlled shape by directly annealing in air. There are lots of reports about metal‐organic framework‐derived metal oxides as electrode materials for supercapacitors. Metal‐organic framework‐derived metal oxides can offer higher capacitances compared with that prepared by other synthetic methods, likely attribute to high surface areas and optimal pore sizes. However, at present, the specific capacitances of MOF‐derived metal oxides received are far lower than theoretical values, and the cycle numbers could not meet practical demands. Accordingly, much effort has been made to improve the performance by further modifying MOFs. Thus, this paper focused on the advances in performance optimization of MOF‐derived metal oxide as electrode materials for supercapacitors as follows: Dual metal MOF‐derived binary metal oxides. Metal oxides with 2 metal cations possess better electrical conductivity and richer redox active sites than single metal oxides. Metal‐organic framework‐derived carbon/metal oxide composites (MO@C) or graphene/MOF‐derived graphene/metal oxide composites. Doping carbon not only facilitate transportation of electrodes but also contribution to extra double‐layer capacitance. Hybrid MOF‐derived metal oxide composites (MO@MO). Metal oxide composites can produce some synergistic effects that the individuals cannot provide. Metal‐organic framework‐derived metal oxides with a hollow structure. The Hollow structure could shorten ion diffusion distance and adapt to volume expansion generated during the ion intercalated/extracted process.

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“…Deconvoluted multiple peaks of Cr 2p 3/2 are mainly assigned to Cr 3 + at 575.1 and 576.4 eV implying a fine structure of Cr 2 O 3 and Cr 6 + at 579 eV confirming a trace amount of CrO 3 . [29]…”

Section: Structural Characterizationmentioning

confidence: 99%

“…In addition, Ni(OH) 2 is reported to be an electrocatalyst for oxygen evolution from water without noble metal co-catalysts. [25][26][27] Cr 2 O 3 is a p-type semiconductor that is used as an energy storage material in supercapacitors, [28,29] so that it could be suitable for positive charge accumulation. Because the ionization energy of Cr 2 O 3 is~5.7 eV [30] and work function of Au is 5.1 eV, [31] Schottky junction with the barrier height of~0.6 eV is expected for the Au-Cr 2 O 3 interface ( Figure 1c).…”

Section: Introductionmentioning

confidence: 99%

Visible‐Light‐Driven Plasmonic Photocatalysis Enhanced by Charge Accumulation

2019

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Plasmon‐induced charge separation (PICS) at the interface between a plasmonic material and semiconductor is employed to drive photocatalytic reactions for conversion and storage of solar energy. Most of the conventional photoelectrodes based on PICS have an n‐M type structure with an interface between n‐type semiconductor (typically TiO2) and plasmonic metal (typically Au) nanoparticles. Here we develop n‐M‐p type photoelectrodes by coating the TiO2/Au photoelectrode with Ni(OH)2 or CrOx, which can collect and store positive charges. Both of the photoelectrodes show efficient PICS under visible light and accumulate positive charges released from resonant Au nanoparticles. The accumulated charges can be used for oxidation of organic species such as ethanol in the dark. The TiO2/AuNP/Ni(OH)2 photoelectrode exhibits an oxygen evolution ability under visible light with a certain bias voltage.

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A novel Cr 2 O 3 -carbon composite as a high performance pseudo-capacitor electrode material

Cited by 70 publications

References 41 publications

Novel Two‐Dimensional Porous Materials for Electrochemical Energy Storage: A Minireview

Novel Two‐Dimensional Porous Materials for Electrochemical Energy Storage: A Minireview

A review of performance optimization of MOF-derived metal oxide as electrode materials for supercapacitors

Visible‐Light‐Driven Plasmonic Photocatalysis Enhanced by Charge Accumulation

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