Bimetallic electron-induced phase transformation of CoNi LDH-GO for high oxygen evolution and supercapacitor performance

Zhao, Wenyu; Liu, Tingting; Wu, Niandu; Zhou, Baiquan; Yan, Yuxiang; Ye, Yong‐Chun; Gong, Jiangbin; Yang, Shengchun

doi:10.1007/s40843-022-2170-6

Cited by 15 publications

(9 citation statements)

References 54 publications

(51 reference statements)

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“…Layered double hydroxides (LDHs) are synthetic two-dimensional (2D) nanostructured anionic clays [105,106]. It is an ionic, positively charged brucite structure with interlayer portions that contain charge compensation anions.…”

Section: Go-layered Double Hydroxidementioning

confidence: 99%

“…Thus, the C s of GO may be increased by combining it with Co 2 -Ni 1 LDH (GO/Co 2 -Ni 1 LDH) for supercapacitor applications. Thus, Zhao et al produced GO/Co 2 -Ni 1 LDH using the reflux technique at 90 • C [106]. The mixture of water, hexamethylenetetramine, GO, 2.0 M NiCl 2 •6H 2 O, and 1.0 M CoCl 2 •6H 2 O was refluxed at 90 • C. After a 3 h reaction, the mixture was washed with water and ethanol to yield a GO/Co 2 -Ni 1 LDH.…”

Section: Go-layered Double Hydroxidementioning

confidence: 99%

“…It may be feasible to improve the conductivity and other characteristics by combining carbon-based materials. Therefore, Zhao et al developed an optimal ratio of Co 2 Ni 1 LDH composite with GO (Co 2 Ni 1 -GO) for the electrochemical study in 3.0 M KOH [106]. The electrode exhibited PC behavior due to the redox reaction caused by LDH in the electrolytes.…”

Section: Go-layered Double Hydroxidesmentioning

confidence: 99%

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Recent Progress Using Graphene Oxide and Its Composites for Supercapacitor Applications: A Review

Sriram,

Arunpandian,

Dhanabalan

et al. 2024

Inorganics

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Supercapacitors are prospective energy storage devices for electronic devices due to their high power density, rapid charging and discharging, and extended cycle life. Materials with limited conductivity could have low charge-transfer ions, low rate capability, and low cycle stability, resulting in poor electrochemical performance. Enhancement of the device’s functionality can be achieved by controlling and designing the electrode materials. Graphene oxide (GO) has emerged as a promising material for the fabrication of supercapacitor devices on account of its remarkable physiochemical characteristics. The mechanical strength, surface area, and conductivity of GO are all quite excellent. These characteristics make it a promising material for use as electrodes, as they allow for the rapid storage and release of charges. To enhance the overall electrochemical performance, including conductivity, specific capacitance (Cs), cyclic stability, and capacitance retention, researchers concentrated their efforts on composite materials containing GO. Therefore, this review discusses the structural, morphological, and surface area characteristics of GO in composites with metal oxides, metal sulfides, metal chalcogenides, layered double hydroxides, metal–organic frameworks, and MXene for supercapacitor application. Furthermore, the organic and bacterial functionalization of GO is discussed. The electrochemical properties of GO and its composite structures are discussed according to the performance of three- and two-electrode systems. Finally, this review compares the performance of several composite types of GO to identify which is ideal. The development of these composite devices holds potential for use in energy storage applications. Because GO-modified materials embrace both electric double-layer capacitive and pseudocapacitive mechanisms, they often perform better than pristine by offering increased surface area, conductivity, and high rate capability. Additionally, the density functional theory (DFT) of GO-based electrode materials with geometrical structures and their characteristics for supercapacitors are addressed.

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Section: Go-layered Double Hydroxidementioning

confidence: 99%

Section: Go-layered Double Hydroxidementioning

confidence: 99%

Section: Go-layered Double Hydroxidesmentioning

confidence: 99%

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Recent Progress Using Graphene Oxide and Its Composites for Supercapacitor Applications: A Review

Sriram,

Arunpandian,

Dhanabalan

et al. 2024

Inorganics

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“…Aqueous supercapacitors (SCs) have been a research hot spot in the field of electrochemical energy storage owing to the advantages of high safety, environmental friendliness, and low cost, but the lower energy density has limited their application areas. − It is widely known that the energy density of supercapacitors depends on their specific capacity and operating voltage. − Researchers have generally assembled aqueous asymmetric supercapacitors composed of two different electrode materials, , which can not only maximize the operating voltage of the device by utilizing the different potential windows of the different electrodes but also enhance the specific capacity by selecting various electrode materials.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Positive and Negative Composite Electrode Materials for High-Performance Aqueous Asymmetric Supercapacitor by a Sequential Two-Step Reaction

Liu,

Yao,

Hou

et al. 2024

ACS Appl. Energy Mater.

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Aqueous asymmetric supercapacitors with high energy density and long cycle life prepared by simple methods have significant value for applications. Composite electrode materials compounded of redox-active organic materials and graphene composites can combine the advantages of high specific capacity and good conductivity, making them ideal candidates for high-performance aqueous supercapacitors. In this work, positive and negative materials for aqueous asymmetric supercapacitors were prepared by a simple sequential two-step reaction. First, pphenylenediamine grafted graphene (PRG), as the positive electrode material, is synthesized by graphene oxide and pphenylenediamine through the amidation reaction. Next, graphene/poly(naphthylimide) (PRG@NDI) is prepared by in-situ polymerization of naphthalimide on the PRG surface, which plays the role of the negative electrode material. The PRG undergoes an oxidation reaction during charging, and the PRG@NDI undergoes a reduction reaction simultaneously, which increases the specific capacity of the aqueous asymmetric supercapacitor. Moreover, the interface contact between poly(naphthylimide) and graphene is promoted by covalent bonding, which facilitates charge transport and then imparts high specific capacity and cycling stability. This device can deliver a high energy density of 27.3 Wh kg −1 at 750 W kg −1 and remarkable cycling stability with a capacity retention rate of 84.5% after 15,000 cycles.

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“…In the past ten years, there has been a significant interest in designing high-performance electrocatalysts for the oxygen evolution reaction (OER) due to the demand of producing green hydrogen by water electrolysis. The OER is a critical half-reaction in the water electrolysis process as it is the efficiency-limiting step due to the multielectron transfer process and the resulting sluggish kinetics. − The traditional benchmark OER catalysts are mainly noble metal-based oxides, such as ruthenium oxide (RuO 2 ) and iridium oxide (IrO 2 ); their development is limited due to their low reserves and high cost. , Some of the most promising emerging candidate OER catalysts are transition metal-based layered double hydroxides (LDHs), such as NiFe LDHs, CoFe LDHs, and NiCo LDHs. − LDHs are a family of two-dimensional layered materials; the most common examples have the general formula [M 1– x II M x III (OH) 2 ](A n – ) x / n · y H 2 O, where M II and M III are divalent and trivalent metallic cations, respectively, and A n – represents the intercalated charge-compensating counteranions. , The use of the more earth-abundant transition metals in different combinations in the LDH framework can create synergistic effects that may improve electrocatalytic activity. Recent studies have shown that LDHs have excellent OER activity when compared to materials such as high-entropy alloys, spinels, and perovskites …”

Section: Introductionmentioning

confidence: 99%

Intrabasal Plane Defect Formation in NiFe Layered Double Hydroxides Enabling Efficient Electrochemical Water Oxidation

Huang,

Kim,

Jang

et al. 2023

ACS Appl. Mater. Interfaces

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Defect engineering has proven to be one of the most effective approaches for the design of high-performance electrocatalysts. Current methods to create defects typically follow a top-down strategy, cutting down the pristine materials into fragmented pieces with surface defects yet also heavily destroying the framework of materials that imposes restrictions on the further improvements in catalytic activity. Herein, we describe a bottomup strategy to prepare free-standing NiFe layered double hydroxide (LDH) nanoplatelets with abundant internal defects by controlling their growth behavior in acidic conditions. Our best-performing nanoplatelets exhibited the lowest overpotential of 241 mV and the lowest Tafel slope of 43 mV/dec for the oxygen evolution reaction (OER) process, superior to the pristine LDHs and other reference cation-defective LDHs obtained by traditional etching methods. Using both material characterization and density functional theory (DFT) simulation has enabled us to develop relationships between the structure and electrochemical properties of these catalysts, suggesting that the enhanced electrocatalytic activity of nanoplatelets mainly results from their defect-abundant structure and stable layered framework with enhanced exposure of the (001) surface.

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Bimetallic electron-induced phase transformation of CoNi LDH-GO for high oxygen evolution and supercapacitor performance

Cited by 15 publications

References 54 publications

Recent Progress Using Graphene Oxide and Its Composites for Supercapacitor Applications: A Review

Recent Progress Using Graphene Oxide and Its Composites for Supercapacitor Applications: A Review

Preparation of Positive and Negative Composite Electrode Materials for High-Performance Aqueous Asymmetric Supercapacitor by a Sequential Two-Step Reaction

Intrabasal Plane Defect Formation in NiFe Layered Double Hydroxides Enabling Efficient Electrochemical Water Oxidation

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