Facile synthesis of porous Mn-doped Co3O4 oblique prisms as an electrode material with remarkable pseudocapacitance

Chen, Huiyu; Wang, Jinpeng; Liao, Fan; Han, Xingrong; Xu, Chunju; Zhang, Yanfei

doi:10.1016/j.ceramint.2019.02.010

Cited by 61 publications

(19 citation statements)

References 56 publications

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“…suggested the presence of Co 3+ and Co 2+ in the FeCo 2 O 4 material. 40 The Co 2p 3/2 and Co 2p 1/2 major peaks were fitted into two subpeaks, respectively, among which the fitting peaks at approximate 779.5 and 794.8 eV were corresponding to Co 3+ , while the ones appeared at around 781.0 and 796.5 eV were associated with Co 2+ . 41 As for O 1s spectrum was concerned, it was consisted of three types of oxygen contributions at 529.8 (O1), 531.5 (O2), and 532.5 eV (O3) (Figure 3d).…”

Section: Resultsmentioning

confidence: 99%

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Sun

et al. 2020

ACS Appl. Energy Mater.

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Transition metal oxides (TMOs) can serve as advanced electrode materials and have attracted extensive attention in the past decade. Herein, porous FeCo 2 O 4 microspheres (FeCo 2 O 4 MSs) and FeCo 2 O 4 nanosheets (FeCo 2 O 4 NSs) have been successfully synthesized in different solvent systems, accompanied by a corresponding annealing treatment of precursors. The FeCo 2 O 4MSs and NSs possessed a mesoporous structure, and the BET surface areas reached 40.9 and 38.5 m 2 g −1 , respectively. The electrochemical studies were performed in a KOH aqueous electrolyte, and such FeCo 2 O 4 MSs delivered 231.5 C g −1 at 1 A g −1 and exhibited a good long-term cycling performance during 5000 cycles with 71.3% capacity retention. In contrast, the FeCo 2 O 4 NSs delivered a higher capacity of 339.0 C g −1 at 1 A g −1 and exhibited a better rate capability with 73% capacity retention at 13 A g −1 . Furthermore, the assembled FeCo 2 O 4 NSs//AC ASC could preserve 100.5% specific capacity after 5000 cycles and exhibited a high energy density of 37.1 W h kg −1 at 928.0 W kg −1 , while the FeCo 2 O 4 MSs//AC ASC possessed a relatively low energy density with 26.2 W h kg −1 at 965.5 W kg −1 . The outstanding electrochemical behavior of FeCo 2 O 4 NSs and MSs makes them promising electrode materials in electrochemical storage devices. Additionally, this current synthetic strategy possesses some advantages such as simple handling, low maintenance cost, and environmental friendliness; thus, it can be employed for synthesizing other TMOs with superior electrochemical properties.

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Section: Resultsmentioning

confidence: 99%

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Sun

et al. 2020

ACS Appl. Energy Mater.

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“…A large number of TMOs based materials including CeO 2, 9 MnO 2, 10 NiO, 11 Fe 2 O 3 12 and Co 3 O 4 are being used for supercapacitor applications 13 . Among of these TMOs‐based materials, Co 3 O 4 is cost‐effective, environmental‐friendly and offers large theoretical specific capacitance of 3560 F/g 14,15 . This material (cobalt oxide) can exist in three forms known as cobaltosic oxide (Co 3 O 4 ), cobaltic oxide (Co 2 O 3 ) and cobaltous oxide (CoO).…”

Section: Introductionmentioning

confidence: 99%

“…13 Among of these TMOs-based materials, Co 3 O 4 is cost-effective, environmental-friendly and offers large theoretical specific capacitance of 3560 F/g. 14,15 This material (cobalt oxide) can exist in three forms known as cobaltosic oxide (Co 3 O 4 ), cobaltic oxide (Co 2 O 3 ) and cobaltous oxide (CoO). In comparison to others, the cobaltosic oxide (Co 3 O 4 ) possesses more stable structure, and it is easier to fabricate and catalytically more active; hence, on the bases of these interesting behavior, it is widely studied and used for electrochemical applications.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of cerium‐doped Co ₃ O ₄ nanoflakes as electrode for supercapacitor application

et al. 2020

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Summary In this work, cerium was doped in various concentrations ranging from 1.0 to 7.0 at. % by means of a facile hydrothermal synthesis route with an intention to improve the capacitive properties of Co3O4. X‐ray powder diffraction (XRD), scanning electron microscopy coupled with energy dispersive X‐ray spectroscopy (EDX) and HRTEM were employed to study the structural characteristics, morphology, elemental constitution and d‐spacing of the synthesized material. The capacitive characteristics were analyzed through cyclic voltammetry (CV), galvanostatic charge‐discharge (GCD) test and electrochemical impedance spectroscopy (EIS). Materials characterizations revealed the formation of pristine and Ce‐doped Co3O4 nanoflakes, and their average size was in the range of 45 to 55 nm and possessing excellent elemental purity. The CV test showed that 5.0 at. % Ce‐doped Co3O4 nanoflakes deliver outstanding specific capacitance, that is, 1309.6 F/g and excellent cyclic stability of 90.86% after 2000 CV cycles at a scan rate 5 mV/s. The GCD test at 1‐10 A/g showed excellent rate capability, that is, 82.87% at high current density of 10 A/g. The EIS test revealed excellent electrical conductivity of the material. Experimental results suggest that Ce‐doped Co3O4 has an outstanding potential for use in energy storage devices.

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“…2d) displayed that there were three oxygen contributions (O1, O2, O3). The O1 component located at 529.5 eV can be indexed to typical metal-oxygen bonding, and the O2 component at 531.1 eV is ascribed to the hydroxyl group [46]. As for O3 component with high binding energy of 532.4 eV, it is corresponding to the water molecules absorbed on the electrode surface [47].…”

Section: Resultsmentioning

confidence: 99%

Egg Albumin-Assisted Hydrothermal Synthesis of Co3O4 Quasi-Cubes as Superior Electrode Material for Supercapacitors with Excellent Performances

et al. 2019

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Novel Co3O4 quasi-cubes with layered structure were obtained via two-step synthetic procedures. The precursors were initially prepared via hydrothermal reaction in the presence of egg albumin, and then the precursors were directly annealed at 300 °C in air to be converted into pure Co3O4 powders. It was found that the size and morphology of final Co3O4 products were greatly influenced by the amount of egg albumin and hydrothermal durations, respectively. Such layered Co3O4 cubes possessed a mesoporous nature with a mean pore size of 5.58 nm and total specific surface area of 80.3 m2/g. A three-electrode system and 2 M of KOH aqueous electrolyte were employed to evaluate the electrochemical properties of these Co3O4 cubes. The results indicated that a specific capacitance of 754 F g−1 at 1 A g−1 was achieved. In addition, the Co3O4 cubes-modified electrode exhibited an excellent rate performance of 77% at 10 A g−1 and superior cycling durability with 86.7% capacitance retention during 4000 repeated charge-discharge process at 5 A g−1. Such high electrochemical performances suggest that these mesoporous Co3O4 quasi-cubes can serve as an important electrode material for the next-generation advanced supercapacitors in the future.

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Facile synthesis of porous Mn-doped Co3O4 oblique prisms as an electrode material with remarkable pseudocapacitance

Cited by 61 publications

References 56 publications

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Hydrothermal synthesis of cerium‐doped Co ₃ O ₄ nanoflakes as electrode for supercapacitor application

Egg Albumin-Assisted Hydrothermal Synthesis of Co3O4 Quasi-Cubes as Superior Electrode Material for Supercapacitors with Excellent Performances

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Facile synthesis of porous Mn-doped Co3O4 oblique prisms as an electrode material with remarkable pseudocapacitance

Cited by 61 publications

References 56 publications

Simple Preparation of Porous FeCo2O4 Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Simple Preparation of Porous FeCo2O4 Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Hydrothermal synthesis of cerium‐doped Co 3 O 4 nanoflakes as electrode for supercapacitor application

Egg Albumin-Assisted Hydrothermal Synthesis of Co3O4 Quasi-Cubes as Superior Electrode Material for Supercapacitors with Excellent Performances

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Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Hydrothermal synthesis of cerium‐doped Co ₃ O ₄ nanoflakes as electrode for supercapacitor application