Investigation for the synthesis of hierarchical Co3O4@MnO2 nanoarrays materials and their application for supercapacitor

Jiang, Ming; Abushrenta, Nasser; Wu, Xiaochao; Li, Yaping; Sun, Xiaoming

doi:10.1007/s10854-016-5656-1

Cited by 14 publications

(5 citation statements)

References 32 publications

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“…Two major peaks of sample SUL-Co 3 O 4 at 779.98 and 795.18 eV are indexed to the Co 2p3/2 and Co 2p1/2 spin–orbit peaks, respectively. By contrast, the Co 2p3/2 and Co 2p 1/2 orbit peaks of 3DOS-Co@Mn are locked at 779.79 and 794.89 eV, which was negatively transferred, demonstrating that the exposed Co ions were more oxidized to Co 3+ after the second hydrothermal process by KMnO 4 , which has strong oxidizing properties . We calculated the ratio of Co 3+ and Co 2+ based on the peak area, and Table S2 clearly shows that the Co 3+ /(Co 2+ + Co 3+ ) values of SUL-Co 3 O 4 and 3DOS-Co@Mn samples were 0.6179 and 0.6243, respectively, further confirming that the 3DOS-Co@Mn sample has more Co 3+ , which has been proven to play a major catalytic role in Co 3 O 4 .…”

Section: Resultsmentioning

confidence: 97%

Improved Electrocatalytic Activity of Three-Dimensional Open-Structured Co₃O₄@MnO₂ Bifunctional Catalysts of Li-O₂ Batteries by Inducing the Oriented Growth of Li₂O₂

Zhou

Jian

et al. 2021

ACS Sustainable Chem. Eng.

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Rational structure and morphology design of catalytic cathode materials is the key to realize excellent performances of lithium-oxygen batteries (LOBs). Herein, a three-dimensional (3D) open-structured Co 3 O 4 @MnO 2 heteromatrix has been designed through a facile two-step hydrothermal method. Unexpectedly, when it serves as oxygen reduction reaction/oxygen evolution reaction bifunctional catalytic cathodes for lithiumoxygen cells, the 3D open-structured Co 3 O 4 @MnO 2 heteromatrix-catalyzed LOBs exhibit outstanding electrochemical performances (a high specific capacity of 12,980 mA h g −1 during the initial discharge and long cycle life of 331, 197, and 14 times with specific capacities fixed at 500, 1000, and even 3000 mA h g −1 , respectively), obviously superior to reported batteries based on low-dimensional and closed-ended catalysts. We find that the enhanced electrochemical performances are ascribed to the bifunctional catalyst and the 3D open structure of the Co 3 O 4 @MnO 2 heteromatrix, which can guide the homogeneous and fluffy deposition of discharge products Li 2 O 2 , demonstrating a promising application in both LOBs and flexible/wearable Li-air batteries.

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Section: Resultsmentioning

confidence: 97%

Improved Electrocatalytic Activity of Three-Dimensional Open-Structured Co₃O₄@MnO₂ Bifunctional Catalysts of Li-O₂ Batteries by Inducing the Oriented Growth of Li₂O₂

Zhou

Jian

et al. 2021

ACS Sustainable Chem. Eng.

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“…After 5000 cycles, it is about 94% of the initial value. [90] Compared with one-dimensional nanneedle-nanowire arrays, three-dimensional network conch structures have rarely been reported. Qiu et al grew Co 3 O 4 conch arrays directly on a nickel foam substrate, coated with a carbon layer, and used as an interfacial reaction template for growing MnO 2 nanosheets to obtain Co 3 O 4 @MnO 2 .…”

Section: Co 3 O 4 Based Binary Oxide (Hydroxide) Compositesmentioning

confidence: 99%

“…The specific capacitance is 21.72 F/cm 2 at a current density of 5 mA/cm 2 , and the cycle stability is good. After 5000 cycles, it is about 94% of the initial value [90] . Compared with one‐dimensional nanneedle‐nanowire arrays, three‐dimensional network conch structures have rarely been reported.…”

Section: Binary Compositementioning

confidence: 99%

Recent Progress in Co₃O₄‐Based Nanomaterials for Supercapacitors

Liu

Yang

et al. 2023

ChemNanoMat

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Supercapacitors which have been widely used in portable electronics and hybrid electric vehicles are considered to be fascinating energy storage devices owing to their higher energy density than traditional capacitors and higher power density than batteries. The performance of supercapacitors is much dependent on the properties of the used electrode materials, and much effort has been devoted to exploring high‐performance electrodes. During the past decade, cobalt‐based materials, especially Co3O4 and its composites, have been regarded as prominent electrode materials for supercapacitors in view of their relatively low cost, high theoretical specific capacitance, non‐toxicity, and excellent electrochemical activity. In this review, we attempt to provide some basic insights into the rational design of Co3O4 based materials/composites and their capacitive properties for supercapacitors. The electrochemical advantages of Co3O4 as a supercapacitor material are summarized, and many examples are illustrated. The remaining challenges in exploration of Co3O4‐based materials as efficient electrodes for supercapacitors are also discussed and the future research directions are offered.

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“…Aligned NAs semiconductors are auspicious aspirants for next-generation optoelectrical devices. [87,88,[92][93][94][95][96][97] Alignment and proper orientation endorse many exceptional characteristics in these photoactive materials. For instance, for ideal PV devices, the NAs need preferably to be aligned vertically with respect to the photoelectrodes.…”

Section: Aligned Nas Materialsmentioning

confidence: 99%

Quasi‐1D Aligned Nanostructures for Solar‐Driven Water Splitting Applications: Challenges, Promises, and Perspectives

et al. 2021

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Solar energy conversion is considered to be one of the promising alternatives to fossil fuels. The photoelectrochemical (PEC) water splitting into hydrogen and oxygen is a prominent approach to utilize solar energy to produce clean hydrogen energy. In PEC water splitting, semiconductors play a central role for absorbing the solar radiations in the UV‐visible region and generating electron‐hole pairs that contribute to water splitting. This review provides an extensive overview of the 1D aligned nanoarrays (1D‐NAs) and their architectures as photoactive materials. 1D‐NAs can be in the form of nanorods (NRs), nanowires (NWs), nanopencils, and nanotubes (NTs), etc. The initial part of the review is dedicated to the synthesis and characterizations of the 1D‐NAs, which is followed by useful synthetic protocols explicitly employed for the synthesis of NAs morphologies and the mechanisms involved in PEC water splitting. The final section of the review provides examples of highly anticipated TiO2, ZnO, BiVO4‐based, and other miscellaneous aligned NAs utilized for PEC water splitting. The PEC water splitting performance of aligned NAs is compared with other morphologies in terms of photocurrent densities. In this review, it is attempted to provide an account of state‐of‐the‐art stable, novel, and low‐cost aligned photoactive materials for PEC water splitting.

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Investigation for the synthesis of hierarchical Co3O4@MnO2 nanoarrays materials and their application for supercapacitor

Cited by 14 publications

References 32 publications

Improved Electrocatalytic Activity of Three-Dimensional Open-Structured Co₃O₄@MnO₂ Bifunctional Catalysts of Li-O₂ Batteries by Inducing the Oriented Growth of Li₂O₂

Improved Electrocatalytic Activity of Three-Dimensional Open-Structured Co₃O₄@MnO₂ Bifunctional Catalysts of Li-O₂ Batteries by Inducing the Oriented Growth of Li₂O₂

Recent Progress in Co₃O₄‐Based Nanomaterials for Supercapacitors

Quasi‐1D Aligned Nanostructures for Solar‐Driven Water Splitting Applications: Challenges, Promises, and Perspectives

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Investigation for the synthesis of hierarchical Co3O4@MnO2 nanoarrays materials and their application for supercapacitor

Cited by 14 publications

References 32 publications

Improved Electrocatalytic Activity of Three-Dimensional Open-Structured Co3O4@MnO2 Bifunctional Catalysts of Li-O2 Batteries by Inducing the Oriented Growth of Li2O2

Improved Electrocatalytic Activity of Three-Dimensional Open-Structured Co3O4@MnO2 Bifunctional Catalysts of Li-O2 Batteries by Inducing the Oriented Growth of Li2O2

Recent Progress in Co3O4‐Based Nanomaterials for Supercapacitors

Quasi‐1D Aligned Nanostructures for Solar‐Driven Water Splitting Applications: Challenges, Promises, and Perspectives

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Product

Resources

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Improved Electrocatalytic Activity of Three-Dimensional Open-Structured Co₃O₄@MnO₂ Bifunctional Catalysts of Li-O₂ Batteries by Inducing the Oriented Growth of Li₂O₂

Improved Electrocatalytic Activity of Three-Dimensional Open-Structured Co₃O₄@MnO₂ Bifunctional Catalysts of Li-O₂ Batteries by Inducing the Oriented Growth of Li₂O₂

Recent Progress in Co₃O₄‐Based Nanomaterials for Supercapacitors