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Items from 1 to 20 out of 4,713 results

article

Effects of Practical Rechargeability Constraints on Perpetual RF Harvesting Sensor Network Operation

Deepak Mishra, Swades De

IEEE Access > 2016 > 4 > 750 - 765

Green perpetual sensor network operation is the need of the hour for critical applications, such as surveillance, military, and environment monitoring. Mobile integrated data collection and recharging is a promising approach to meet this requirement by routinely visiting the field nodes for collecting the sensed data and supplying energy via radio frequency (RF) energy transfer. Practical constraints,...

article

Facilely synthesized α phase nickel–cobalt bimetallic hydroxides: Tuning the composition for high pseudocapacitance

Dandan Xia, Haichao Chen, Jianjun Jiang, Li Zhang, more

Electrochimica Acta > 2015 > 156 > Complete > 108-114

A facile and novel precursor conversion method is successfully developed to grow Ni–Co hydroxides with α phase structure. The method is robust and versatile enough to be employed to prepare α phase Ni–Co hydroxides with similar interconnected flower-like nanostructures even at different Ni and Co contents. When used as the electroactive materials for supercapacitors, the bimetallic Ni–Co hydroxides...

article

Effect of Triton X-100 on the double layer capacitance and conductivity of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films

Tete Tevi, Shantonio W. Saint Birch, Sylvia W. Thomas, Arash Takshi, more

Synthetic Metals > 2014 > 191 > Complete > 59-65

Among conducting polymers, PEDOT:PSS is a promising electrode material for supercapacitors, due to stability and simple processability of the polymer. However, a thin film of spin coated PEDOT:PSS shows a compact structure with relatively low double layer capacitance. In order to enhance the film porosity, a surfactant (Triton X-100) has been added to the polymer solution before spin coating. In this...

article

2D Metal Phosphorous Trichalcogenides (MPCh₃) for Sustainable Energy Storage and Conversion: Nanoarchitectonics and Advanced Applications

Honglei Wang, Pengfei Cheng, Bing Wu, Yong Yan, more

Advanced Functional Materials > 34 > 44 > n/a - n/a

2D metal phosphorous trichalcogenides (MPCh₃) have attracted considerable attention in sustainable energy storage and conversion due to their distinct physical and chemical characteristics, such as adjustable energy bandgap, significant specific surface area, and abundant active sites. However, research on 2D MPCh₃ primarily focuses on electrocatalysis, and understanding its energy conversion and...

article

Metal–Organic Framework Supercapacitors: Challenges and Opportunities

Seung‐Jae Shin, Jamie W. Gittins, Chloe J. Balhatchet, Aron Walsh, more

Advanced Functional Materials > 34 > 43 > n/a - n/a

Supercapacitors offer superior energy storage capabilities than traditional capacitors, making them useful for applications such as electric vehicles and rapid large‐scale energy storage. The energy storage performance of these devices relies on electrical double‐layer capacitance and/or pseudocapacitance from rapid reversible redox reactions. Metal–organic frameworks (MOFs) have recently emerged...

article

Leaf‐Inspired Hetero‐Structure WS₂/WO₃ In Situ Embedded on Pomelo Peel Derived Carbon for Supercapacitor and Capacitive Deionization

Yujing Zheng, Yue Lian, Jing Zhao, Yong Feng Hu, more

Small > 20 > 40 > n/a - n/a

Composite materials have occupied a reliable position in electrochemical energy storage and conversion due to their double electric layer and pseudocapacitance. In this work, a leaf‐like heterostructure composite, obtained by peeling – carbonizing – in situ sulfuration/oxidation approach for the first time, is investigated as electrode material for electrochemical capacitance behavior. The thin and...

article

Enhanced Electrochemical Performance of NiMn Layered Double Hydroxides/Graphene Oxide Composites Synthesized by One‐Step Hydrothermal Method for Supercapacitors

Jun Chen, Xin Jing, Ji‐Chao Wang, Wan‐Qing Zhang, more

Chemistry – A European Journal > 30 > 55 > n/a - n/a

This study aims to enhance the performance of supercapacitors, focusing particularly on optimizing electrode materials. While pure NiMn layered double hydroxides (LDHs) exhibit excellent electrochemical properties, they have limitations in achieving high specific capacitance. Therefore, this paper successfully synthesized composite materials of NiMn LDHs with varying loadings of graphene oxide (GO)...

article

Synthesis of integrated reduced graphene oxide‐polyaniline nanocomposite for enhanced supercapacitor performance

J. Salamon, A. Simi, H. Joy Prabu, A. Felix Sahayaraj, more

Polymer Composites > 45 > 14 > 12899 - 12912

The urgent need for sustainable energy storage solutions has spurred research on high‐performance and cost‐effective energy storage technologies. Supercapacitors (SCs) show great potential due to their capacity to provide significant capacitance, energy and power density. This study focused on the enhancement of electrically conductive reduced Graphene Oxide (rGO) reinforced with polyaniline (PANI)...

article

Accounting for the Quantum Capacitance of Graphite in Constant Potential Molecular Dynamics Simulations

Kateryna Goloviznina, Johann Fleischhaker, Tobias Binninger, Benjamin Rotenberg, more

Advanced Materials > 36 > 39 > n/a - n/a

Molecular dynamics (MD) simulations at a constant electric potential are an essential tool to study electrochemical processes, providing microscopic information on the structural, thermodynamic, and dynamical properties. Despite the numerous advances in the simulation of electrodes, they fail to accurately represent the electronic structure of materials such as graphite. In this work, a simple parameterization...

article

Microwave Doping of Sulfur and Iron in β₁₂ Borophene

Zhixuan Li, Xinwei Guan, Gaurav Pandey, Sumit Chahal, more

Small > 20 > 39 > n/a - n/a

Borophene, a 2D material exhibiting unique crystallographic phases like the anisotropic atomic lattices of β₁₂ and X₃ phases, has attracted considerable attention due to its intriguing Dirac nature and metallic attributes. Despite surpassing graphene in electronic mobility, borophene's potential in energy storage and catalysis remains untapped due to its inherent electrochemical and catalytic limitations...

article

High Specific Surface Area TiO₂ Aerogels Incorporated in situ with Co/Mn Oxides as Stable Electrochemical Capacitor Electrodes

Joseane C. Bernardes, Tatianne R. Dal Ross, Carlos R. Rambo

Advanced Engineering Materials > 26 > 18 > n/a - n/a

Nanocomposite aerogels comprised of TiO₂ and metal (Co and Mn) oxides are synthesized via an in situ sol–gel method in this study, and their structural, compositional and electrochemical properties are evaluated for possible applications as electrodes in energy storage devices. The inclusion of metallic oxides into TiO₂ aerogels hinder the formation of titania crystalline phases, preserved particle...

article

Oxygen‐Assisted Supercapacitive Swing Adsorption of Carbon Dioxide

Muhammad Bilal, Jiajie Li, Neelesh Kumar, Bar Mosevitzky, more

Angewandte Chemie International Edition > 63 > 39 > n/a - n/a

We report on the supercapacitive swing adsorption (SSA) of carbon dioxide at different voltage windows in the presence of oxygen using activated carbon electrodes, and deliquescent, aqueous electrolytes. The presence of O₂ in the CO₂/N₂ gas mixture results in an up to 11 times higher CO₂ adsorption capacity with 3 M MgBr₂ (at 0.6 V) and up to 4–5 times higher adsorption capacity with 3 M MgCl₂ (at...

article

Oxygen‐Assisted Supercapacitive Swing Adsorption of Carbon Dioxide

Muhammad Bilal, Jiajie Li, Neelesh Kumar, Bar Mosevitzky, more

Angewandte Chemie > 136 > 39 > n/a - n/a

article

Flexible Aqueous Supercapacitors for Long Cycle‐Life Using Electrode with Multiple Active C═S Sites

Xinxin Xing, Bita Farhadi, Le Wang, Kai Wang, more

Small > 20 > 37 > n/a - n/a

Even though a few organic materials have attracted considerable attention for energy storage applications, their dissolution in the electrolyte during the charging‐discharging processes presents a formidable challenge to their long‐term performance. In this work, according to the principle of like dissolves like, non‐polar trithiocyanuric acid (TCA) can effectively inhibit dissolution in an aqueous...

article

Conductive MXene/Polymer Composites for Transparent Flexible Supercapacitors

Shan Ren, Xiangyu Pan, Yangyang Zhang, Jianlong Xu, more

Small > 20 > 35 > n/a - n/a

Transparent flexible energy storage devices are limited by the trade‐off among flexibility, transparency, and charge storage capability of their electrode materials. Conductive polymers are intrinsically flexible, but limited by small capacitance. Pseudocapacitive MXene provides high capacitance, yet their opaque and brittle nature hinders their flexibility and transparency. Herein, the development...

article

High‐Entropy Engineering Reinforced Surface Electronic States and Structural Defects of Hierarchical Metal Oxides@Graphene Fibers toward High‐Performance Wearable Supercapacitors (Adv. Mater. 35/2024)

Haowei Hu, Chao Yang, Fangyuan Chen, Jiahui Li, more

Advanced Materials > 36 > 35 > n/a - n/a

High‐Entropy Doped Metal Oxides@Graphene Fibers In article number 2406483, Haowei Hu, Guan Wu, and co‐workers present a high‐entropy doped metal oxide/graphene composite fiber for high‐performance supercapacitors. The fibrous electrodes have abundant oxygen vacancies, lattice distortions and optimized electronic structure for enhanced electron conduction, ions adsorption/diffusion kinetics, structural...

article

High‐Entropy Engineering Reinforced Surface Electronic States and Structural Defects of Hierarchical Metal Oxides@Graphene Fibers toward High‐Performance Wearable Supercapacitors

Haowei Hu, Chao Yang, Fangyuan Chen, Jiahui Li, more

Advanced Materials > 36 > 35 > n/a - n/a

Construction advanced fibers with high Faradic activity and conductivity are effective to realize high energy density with sufficient redox reactions for fiber‐based electrochemical supercapacitors (FESCs), yet it is generally at the sacrifice of kinetics and structural stability. Here, a high‐entropy doping strategy is proposed to develop high‐energy‐density FESCs based on high‐entropy doped metal...

article

Novel Supercapacitor Based on Pedot:PSS/Graphene Oxide Nanocomposite

Giuseppe Greco, Antonella Giuri, Sonia Bagheri, Aurora Rizzo, more

Macromolecular Symposia > 413 > 4 > n/a - n/a

Over the last few years, graphene oxide (GO) has stood out as an ideal carbon‐filler to dope polymer matrix, specifically conductive polymers. This paper investigates the possibility of producing ternary nanocomposites based on a conductive polymer poly(3,4 ethylene dioxythiophene) polystyrene sulfonate (PEDOT:PSS), doped with graphene oxide (GO) and is additivated with a green dispersing and reducing...

article

Large‐Area Fabrication of Porous Graphene Networks on Carbon Fabric via Millisecond Photothermal Processing of Polyaniline for Supercapacitors

Ayush Bhardwaj, Uzodinma Okoroanyanwu, James Nicolas Pagaduan, Wei Fan, more

Small > 20 > 33 > n/a - n/a

Supercapacitors demonstrate promising potential for flexible, multi‐functional energy storage devices; however, their widespread adoption is confronted by fabrication challenges. To access a combination of desirable device qualities such as flexibility, lightweight, structural stability, and enhanced electrochemical performance, carbon fiber (CF) can be utilized as a current collector, alongside graphene...

article

Bi‐Interlayer Strategy for Modulating NiCoP‐Based Heterostructure toward High‐Performance Aqueous Energy Storage Devices

Jian Xu, Xiliang Gong, Zeshuo Meng, Peiyuan Chen, more

Advanced Materials > 36 > 29 > n/a - n/a

Nickel‐cobalt (NiCo) phosphides (NCPs) possess high electrochemical activity, which makes them promising candidates for electrode materials in aqueous energy storage devices, such as supercapacitors and zinc (Zn) batteries. However, the actual specific capacitance and rate capability of NCPs require further improvement, which can be achieved through reasonable heterostructural design and loading conditions...

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Search results

Effects of Practical Rechargeability Constraints on Perpetual RF Harvesting Sensor Network Operation

Facilely synthesized α phase nickel–cobalt bimetallic hydroxides: Tuning the composition for high pseudocapacitance

Effect of Triton X-100 on the double layer capacitance and conductivity of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films

2D Metal Phosphorous Trichalcogenides (MPCh₃) for Sustainable Energy Storage and Conversion: Nanoarchitectonics and Advanced Applications

Metal–Organic Framework Supercapacitors: Challenges and Opportunities

Leaf‐Inspired Hetero‐Structure WS₂/WO₃ In Situ Embedded on Pomelo Peel Derived Carbon for Supercapacitor and Capacitive Deionization

Enhanced Electrochemical Performance of NiMn Layered Double Hydroxides/Graphene Oxide Composites Synthesized by One‐Step Hydrothermal Method for Supercapacitors

Synthesis of integrated reduced graphene oxide‐polyaniline nanocomposite for enhanced supercapacitor performance

Accounting for the Quantum Capacitance of Graphite in Constant Potential Molecular Dynamics Simulations

Microwave Doping of Sulfur and Iron in β₁₂ Borophene

High Specific Surface Area TiO₂ Aerogels Incorporated in situ with Co/Mn Oxides as Stable Electrochemical Capacitor Electrodes

Oxygen‐Assisted Supercapacitive Swing Adsorption of Carbon Dioxide

Oxygen‐Assisted Supercapacitive Swing Adsorption of Carbon Dioxide

Flexible Aqueous Supercapacitors for Long Cycle‐Life Using Electrode with Multiple Active C═S Sites

Conductive MXene/Polymer Composites for Transparent Flexible Supercapacitors

High‐Entropy Engineering Reinforced Surface Electronic States and Structural Defects of Hierarchical Metal Oxides@Graphene Fibers toward High‐Performance Wearable Supercapacitors (Adv. Mater. 35/2024)

High‐Entropy Engineering Reinforced Surface Electronic States and Structural Defects of Hierarchical Metal Oxides@Graphene Fibers toward High‐Performance Wearable Supercapacitors

Novel Supercapacitor Based on Pedot:PSS/Graphene Oxide Nanocomposite

Large‐Area Fabrication of Porous Graphene Networks on Carbon Fabric via Millisecond Photothermal Processing of Polyaniline for Supercapacitors

Bi‐Interlayer Strategy for Modulating NiCoP‐Based Heterostructure toward High‐Performance Aqueous Energy Storage Devices

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