Excellent cycle life of electrode materials based on hierarchical mesoporous CoGa2O4 microspheres

Chen, Xin; Chai, Hui; Cao, Yali; Jia, Dianzeng; Liu, Anjie; Zhou, Wanyong

doi:10.1016/j.cej.2018.08.096

Cited by 40 publications

(26 citation statements)

References 41 publications

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“…To the best of our knowledge, these numbers are among the bests for transition metal‐based battery‐type SC materials. As presented in Figure S3 (SI), the specific capacity of Ov‐LDH at 1 A g −1 is superior to those of the transition metal‐based materials, e.g., Co 3 O 4 /graphene (489 C g −1 ), Ni(OH) 2 /CNT (854 C g −1 ), Zn–Ni–Al–Co oxide nanosheets (839 C g −1 ), FeS 2 /graphene (793 C g −1 ), CoGa 2 O 4 microspheres (642 C g −1 ), and some other widely studied nickel‐/cobalt‐based materials, and it is also superior compared to the excellent NiAl‐LDH/nitramine‐N‐doped graphene (975 C g −1 ) . The volumetric capacity of Ov‐LDH was also calculated in Figure S4 (SI).…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Oxygen‐Vacancy Abundant NiMn‐Layered Double Hydroxides for Ultrahigh Capacity Supercapacitors

Tang

Shen

Cheng

et al. 2020

Adv Funct Materials

256

101

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The rational design of advanced structures consisting of multiple components with excellent electrochemical capacitive properties is one of the crucial hindrances to be overcome for high‐performance supercapacitors (SCs). Herein, a superfast and facile synthesis of flower‐like NiMn‐layered double hydroxides (NiMn‐LDH) with high SC performance using an electrodeposition process on nickel foam is proposed. Oxygen vacancies are then modulated via mild H2O2 treatment for the first time, significantly promoting the electrochemical energy storage performance. The oxygen‐vacancy abundant NiMn‐LDH (Ov‐LDH) reaches a maximum specific capacity of 1183 C g−1 at the current density of 1 A g−1 and retains a high capacity retention of 835 C g−1 even at a current density of up to 10 A g−1. Furthermore, the assembled asymmetric SC device achieves a high specific energy density of 46.7 Wh kg−1 at a power density of 1.7 kW kg−1. Oxygen vacancies are proven to play a vital role in the improvement of electrochemistry performance of LDH based on experimental and theoretical studies. This vacancy engineering strategy provides a new insight into SC active materials and should be beneficial for the design of the next generation of energy storage devices.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Oxygen‐Vacancy Abundant NiMn‐Layered Double Hydroxides for Ultrahigh Capacity Supercapacitors

Tang

Shen

Cheng

et al. 2020

Adv Funct Materials

256

101

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“…In the spectrum of Co 3 O 4 -400, there are two strong absorption peaks at wavelengths of 662 cm À 1 and 563 cm À 1 , which are characteristic absorption peaks of spinel-type Co 3 O 4 . [19] At the same time, it also proves that the weight loss in the process of calcination to Co 3 O 4 is mainly caused by the separation of OH À and CO 3 2À in the precursor in the form of CO 2 (Figure 3c) shows two major peaks with binding energies of 779.86 and 795.1 eV, corresponding to Co 2p 3/2 and Co 2p 1/2 , which are characteristic peaks for the Co 3 O 4 phase. And Co 2p 3/2 is fitted to two peaks, corresponding to Co 2 + and Co 3 + , respectively, which proves that Co element exists in Co 3 O 4 in a mixed valence state of divalent and trivalent.…”

Section: Synthesis and Characterization Of Co 3 Omentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

“…With the increasing fossil energy crisis and environmental pollution, research hotspots in nowadays society are increasingly focused on clean sustainable energy and energy storage equipment. [1][2][3][4] Hybrid supercapacitors, as an important energy storage device, possess high potential for application in many areas owing to several advantages, such as high power density, fast charge/discharge process, long-term cycle life and ecofriendly, which can shorten the big gap of power density and energy density between conventional capacitors and batteries. According to the charge storage mechanisms, supercapacitors can usually be divided into two types, one is a double-layer capacitor that stores the charge at the interface between the electrode of the capacitor and the electrolyte solution, and the other is a pseudocapacitor that stores the charge by Faraday reaction occurring on the surface of the electroactive material on the electrode.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Homogeneous Hollow Co₃O₄ Microspheres for Enhanced Cycle Life and Electrochemical Energy Storage Performance

et al. 2020

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How to achieve a balance between excellent pseudocapacitive performance and simplicity of the synthetic pathway of Co3O4 is still a challenge. Herein, hollow Co3O4 microspheres were synthesized through a facile template‐free solvothermal approach with a following calcination treatment. The synthetic Co3O4 exhibited remarkable electrochemical properties in terms of high specific capacity 922.7 F g−1 at 1 A g−1, superior rate capability with 67.7 % capacitance retention (1–20 A g−1), as well as excellent cycling stability (105.6 % retention after 10000 cycles). A hybrid supercapacitor device is also successfully assembled consisting of a Co3O4 cathode and a reduced graphene oxide anode with a wide potential window of 0–1.65 V, which delivers a high energy density and an outstanding cycle lifetime. These superior electrochemical properties will render the hollow Co3O4 microsphere material as an attractive material for promising application in high‐performance electrochemical energy storage systems.

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“…To the best of authors knowledge, there is only one report on using cobalt gallium oxide (CGO) as a cathode electrode for ASC. Chai et al proposed CGO spinels with the SpCa of 642.4 C g –1 and remarkable durableness with E N D E of 36.71 Wh kg –1 for the ASC . Thus, to enhance the electrochemical properties of CGO, the fabrication of HNMs with large SA can be efficient.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Energy Storage Device Based on Triple-Shelled Cobalt Gallium Oxide Hollow Spheres and Graphene Wrapped Copper Iron Disulfide Porous Spheres

Zardkhoshoui

Davarani

Ashtiani

et al. 2019

ACS Sustainable Chem. Eng.

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Demanding more reliable power sources causes a huge development of modern electronic and optoelectronic devices with a high energy density (ENDE) and exceptional durability. Accordingly, designing modern electrode materials with outstanding structures can improve the construction of a new generation of electronic devices. Transition metal oxides hollow structures (TMOHS) have received considerable attention as appropriate materials for supercapacitors due to their structural properties and electrochemical performances. As a fascinating TMOHS, we make a new highly porous triple-shelled cobalt gallium oxide (CoGa2O4) hollow spheres (HTS-CGOHS) with triple narrow shells, and pseudocapacitive graphene wrapped CuFeS2 hollow spheres (GW@CFSHS) as developed positive and negative electrodes, respectively, in an energy storage device. The HTS-CGOHS electrode shows specific capacitance (SpCa) of 1724.30 F g–1 (239.5 mAh g–1) at 1 A g–1 which maintains as high as 1198.40 F g–1 (166.44 mAh g–1) at 24 A g–1, and reasonable durableness (96.80% capacity retention at 12 A g–1) owing to the low internal resistance, fast kinetics, reversibility, high surface area (104.30 m2 g–1), and numerous active sites. Moreover, the GW@CFSHS advanced negative electrode reveals electrochemical performance comprising a SpCa of 621.20 F g–1 (172.6 mAh g–1), rate performance of 58% and excellent durableness, which are superior to that of CuFeS2 hollow sphere (CFSHS) electrode. According to the electrochemical nature of the as-obtained pseudocapacitive electrode materials, an energy storage device (ESD) based on the HTS-CGOHS as a cathode and GW@CFSHS as an anode was studied. The HTS-CGOHS//GW@CFSHS device shows SpCa of 376.40 F g–1 (153.1 mAh g–1), high ENDE of 114.8 W h kg–1, and notable durableness (only 6.3% decrease after 5000 cycles at 6 A g–1).

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Excellent cycle life of electrode materials based on hierarchical mesoporous CoGa2O4 microspheres

Cited by 40 publications

References 41 publications

Fabrication of Oxygen‐Vacancy Abundant NiMn‐Layered Double Hydroxides for Ultrahigh Capacity Supercapacitors

Fabrication of Oxygen‐Vacancy Abundant NiMn‐Layered Double Hydroxides for Ultrahigh Capacity Supercapacitors

Synthesis of Homogeneous Hollow Co₃O₄ Microspheres for Enhanced Cycle Life and Electrochemical Energy Storage Performance

High-Performance Energy Storage Device Based on Triple-Shelled Cobalt Gallium Oxide Hollow Spheres and Graphene Wrapped Copper Iron Disulfide Porous Spheres

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Excellent cycle life of electrode materials based on hierarchical mesoporous CoGa2O4 microspheres

Cited by 40 publications

References 41 publications

Fabrication of Oxygen‐Vacancy Abundant NiMn‐Layered Double Hydroxides for Ultrahigh Capacity Supercapacitors

Fabrication of Oxygen‐Vacancy Abundant NiMn‐Layered Double Hydroxides for Ultrahigh Capacity Supercapacitors

Synthesis of Homogeneous Hollow Co3O4 Microspheres for Enhanced Cycle Life and Electrochemical Energy Storage Performance

High-Performance Energy Storage Device Based on Triple-Shelled Cobalt Gallium Oxide Hollow Spheres and Graphene Wrapped Copper Iron Disulfide Porous Spheres

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Synthesis of Homogeneous Hollow Co₃O₄ Microspheres for Enhanced Cycle Life and Electrochemical Energy Storage Performance