Themed collection Design and characterization of flexible electrode materials

31 items
Editorial

Design and characterization of flexible electrode materials

Xiu Song (George) Zhao, Hui Ying Yang, and Qiang Li introduce the Journal of Materials Chemistry A themed collection on design and characterization of flexible electrode materials.

Graphical abstract: Design and characterization of flexible electrode materials
Perspective

Advancing low-dimensional flexible energy devices for wearable technology

This perspective article discusses the research, issues, and prospects of flexible batteries and supercapacitors in terms of one- and two-dimensions, as well as their stretchable, bendable, and twistable properties.

Graphical abstract: Advancing low-dimensional flexible energy devices for wearable technology
Review Article

Polymer-based films for all-in-one piezo-driven self-charging power systems

This review highlights the materials selection and self-charging performance of polymer based piezoelectric components in all-in-one self-charging power systems.

Graphical abstract: Polymer-based films for all-in-one piezo-driven self-charging power systems
Review Article

Recent advances and perspectives of 1D/2D carbon materials for high-performance flexible zinc ion batteries

This review provides a summary of recent advancements in 1D/2D carbon materials (carbon nanotubes, graphene, MXenes, and carbon fibers) for FZIBs. It mainly introduces the functions of 1D/2D carbon materials in enhancing the performance of FZIBs.

Graphical abstract: Recent advances and perspectives of 1D/2D carbon materials for high-performance flexible zinc ion batteries
From the themed collection: Journal of Materials Chemistry A HOT Papers
Review Article

Flexible electrode materials for emerging electronics: materials, fabrication and applications

This paper reviews the progress of flexible electrodes in recent years, including flexible substrates, active materials, manufacturing methods, and their latest applications in flexible sensors, flexible energy storage, and medical and healthcare.

Graphical abstract: Flexible electrode materials for emerging electronics: materials, fabrication and applications
Review Article

Fabrication strategies for metallic nanowire flexible transparent electrodes with high uniformity

Recent strategies for improving the uniformity of metallic nanowire-based flexible transparent electrodes for application in highly reliable flexible devices are reviewed.

Graphical abstract: Fabrication strategies for metallic nanowire flexible transparent electrodes with high uniformity
Review Article

Non-Ir based catalysts for the electrocatalytic oxygen evolution reaction: progress and challenges

Oxygen evolution reaction (OER) electrocatalysis is the key to solve the problem of hydrogen production by hydrolyzing water and secondary metal–air batteries.

Graphical abstract: Non-Ir based catalysts for the electrocatalytic oxygen evolution reaction: progress and challenges
Review Article

Conjugated microporous polymers: their synthesis and potential applications in flexible electrodes

In this review, first, the synthesis of CMPs is reviewed. Second, the application of CMPs in flexible electronics is emphatically introduced. Finally, the problems and challenges of CMPs in flexible electrode materials are discussed.

Graphical abstract: Conjugated microporous polymers: their synthesis and potential applications in flexible electrodes
Open Access Review Article

Anode-free lithium metal batteries: a promising flexible energy storage system

The anode-free lithium metal battery is characterized by light weight, low cost, high-energy density, and high safety and shows great potential for the application of flexible devices.

Graphical abstract: Anode-free lithium metal batteries: a promising flexible energy storage system
Review Article

Insights into electrolyte flooding in flexible gas diffusion electrodes for CO2 electrolysis: from mechanisms to effective mitigation strategies

This review aims to offer insights into the fundamental mechanisms of triggering electrolyte flooding in GDEs for CO2 electrolysis approaches for characterizing flooding, and potential strategies for mitigating electrolyte flooding.

Graphical abstract: Insights into electrolyte flooding in flexible gas diffusion electrodes for CO2 electrolysis: from mechanisms to effective mitigation strategies
Review Article

Flexible resistive tactile pressure sensors

This review covers recent advancements in flexible resistive tactile pressure sensors, including operational principles, performance metrics, material choices, structural design, and applications, as well as future challenges.

Graphical abstract: Flexible resistive tactile pressure sensors
Review Article

Recent progress in polyaniline-based chemiresistive flexible gas sensors: design, nanostructures, and composite materials

An overview of nanostructured PANI gas sensors and chemiresistive or heterojunction-based PANI composite gas sensors.

Graphical abstract: Recent progress in polyaniline-based chemiresistive flexible gas sensors: design, nanostructures, and composite materials
Paper

A flexible asymmetric supercapacitor assembled by dahlia-like core–shell cobalt/tin-based chalcogenide@nickel hydroxide grown on reduced graphene oxide

rCSCTN hybrids are synthesized through a facile hydrothermal method and employed for the fabrication of a flexible all-solid-state asymmetric supercapacitor with superb performance.

Graphical abstract: A flexible asymmetric supercapacitor assembled by dahlia-like core–shell cobalt/tin-based chalcogenide@nickel hydroxide grown on reduced graphene oxide
Open Access Paper

Printed magnetoresistive sensors for recyclable magnetoelectronics

We validate the concept of fully recyclable printed magnetoelectronics, which not only enables low-cost high-throughput fabrication of magnetic sensors, but also importantly reduces the environmental burden related to electronic wastes.

Graphical abstract: Printed magnetoresistive sensors for recyclable magnetoelectronics
Paper

Quantification probing of available extra capacity: interfacial space-charge storage in FeOOH lithium-ion batteries

Operando magnetometry shows evolution of paramagnetism FeOOH in LIBs: rising/falling magnetism from superparamagnetism Fe reduction/interfacial space-charge storage (reversible extra capacity) during discharge, which is reversed during charge.

Graphical abstract: Quantification probing of available extra capacity: interfacial space-charge storage in FeOOH lithium-ion batteries
Paper

Decoupling Li+ conductivity and mechanical stability in a thermally reversible concentrated sulfone-based gel electrolyte for lithium metal batteries

This work presents a mechanically strong and highly Li+-conductive gel electrolyte featuring thermally induced electrode wetting and healing, which holds great promise in solid-state lithium-metal batteries and other flexible and wearable devices.

Graphical abstract: Decoupling Li+ conductivity and mechanical stability in a thermally reversible concentrated sulfone-based gel electrolyte for lithium metal batteries
Paper

Altering Na-ion solvation to regulate dendrite growth for a reversible and stable room-temperature sodium–sulfur battery

Theoretical calculation reveals that the additive (BiI3) changes the local solvation shell dynamics and improves the Na ion kinetics by reducing binding energy. In addition, the formation of an alloy interphase realizes a dendrite-free deposition.

Graphical abstract: Altering Na-ion solvation to regulate dendrite growth for a reversible and stable room-temperature sodium–sulfur battery
Paper

Dual design of electrodes and electrolytes ensures flexible symmetric micro-supercapacitors with high energy density

Benefiting from the dual design of electrodes and electrolytes, a flexible symmetric micro-supercapacitor device has been assembled to achieve a high areal energy density.

Graphical abstract: Dual design of electrodes and electrolytes ensures flexible symmetric micro-supercapacitors with high energy density
Paper

Strain and defect-engineering on the basal plane of ultra-large MoS2 monolayers attached onto stretchable gold electrodes

Stretching the performance of ultra-large MoS2 monolayers for electrochemical hydrogen generation – flexible and stretchable gold electrodes were fabricated to tune the reactivity of MoS2 monolayers.

Graphical abstract: Strain and defect-engineering on the basal plane of ultra-large MoS2 monolayers attached onto stretchable gold electrodes
Paper

2D crumpled nitrogen-doped carbon nanosheets anode with capacitive-dominated behavior for ultrafast-charging and high-energy-density Li-ion capacitors

The synergistic effect of abundant mesopore distribution and nitrogen doping enables 2D crumpled nitrogen-doped carbon nanosheets as anode materials for Li-ion capacitors with large capacitive-capacities and ultrahigh rate performance.

Graphical abstract: 2D crumpled nitrogen-doped carbon nanosheets anode with capacitive-dominated behavior for ultrafast-charging and high-energy-density Li-ion capacitors
Paper

Co/Li2S of chemical confinement decorated electrochemically stable Co(OH)F nanoarrays enabling dendrite-free flexible 3D Li anodes

The 3D CoS2–Co(OH)F/CC skeleton suppresses Li dendrite growth.

Graphical abstract: Co/Li2S of chemical confinement decorated electrochemically stable Co(OH)F nanoarrays enabling dendrite-free flexible 3D Li anodes
Paper

Eye-wearable Ti3C2Tx MXene-based micro-supercapacitor as a power unit for intraocular pressure applications

An eye-wearable Ti3C2Tx MXene-based micro-supercapacitor was fabricated on a soft hemispherical substrate, which can be used as an efficient power unit for intraocular pressure applications.

Graphical abstract: Eye-wearable Ti3C2Tx MXene-based micro-supercapacitor as a power unit for intraocular pressure applications
Paper

Nitridation-boosted V eg occupation of a VN@CNT flexible electrode for high-rate Zn-ion hybrid supercapacitors

Flexible Zn-ion hybrid supercapacitors (f-ZHSCs), with inherent safety, combine the advantages of the high power density of SCs and the high energy density of ZIBs, making them a promising energy supply device for wearable devices.

Graphical abstract: Nitridation-boosted V eg occupation of a VN@CNT flexible electrode for high-rate Zn-ion hybrid supercapacitors
Paper

Pore-size tuning of hard carbon to optimize its wettability for efficient Na+ storage

The Na+ reaction kinetics of hard carbon can be enhanced by improving its wettability through pore-size tuning. The optimized carbonaceous anodes with an average pore size of 6.1 nm exhibited the most enhanced Na+ storage capability.

Graphical abstract: Pore-size tuning of hard carbon to optimize its wettability for efficient Na+ storage
From the themed collection: Journal of Materials Chemistry A HOT Papers
Paper

Foldable chromium vanadate cathodes for high-performance aqueous zinc ion batteries

A novel cathode material, CrV2.7O4.36·2.85H2O/CNT-rGO, composited with a CNT and rGO framework was developed. The flexible battery assembled with it still has stable electrochemical performance under different folding states.

Graphical abstract: Foldable chromium vanadate cathodes for high-performance aqueous zinc ion batteries
From the themed collection: Journal of Materials Chemistry A HOT Papers
Paper

Highly stretchable GR/TPU strain sensor based on one-step electrospun fibrous yarns for wearable devices

A highly stretchable GR/TPU strain sensor is fabricated based on one-step electrospun fibrous yarns for wearable devices.

Graphical abstract: Highly stretchable GR/TPU strain sensor based on one-step electrospun fibrous yarns for wearable devices
Paper

A “two-birds-one-stone” strategy to enhance capacitive deionization performance of flexible Ti3C2Tx MXene film electrodes by surface modification

A dual-function strategy is proposed that uses sodium ascorbate to modify Ti3C2Tx MXene for flexible and free-standing electrodes for capacitive deionization, enhancing its oxidation resistance and salt adsorption capacity.

Graphical abstract: A “two-birds-one-stone” strategy to enhance capacitive deionization performance of flexible Ti3C2Tx MXene film electrodes by surface modification
From the themed collection: Journal of Materials Chemistry A HOT Papers
Paper

Cobalt-based current collectors for flexible electrodes and their application in lithium–sulfur batteries

A Co-based current collector with high conductivity and light weight can improve the conductivity and battery performance of flexible electrodes.

Graphical abstract: Cobalt-based current collectors for flexible electrodes and their application in lithium–sulfur batteries
Paper

CoP/CoN heterostructural active centers supported on nitrogen carbon nanorod arrays as freestanding high-performance trifunctional electrocatalysts

Freestanding CoP/CoN heterostructure electrocatalysts for zinc–air batteries and water splitting, and the catalytic mechanism was verified based on DFT and experiments.

Graphical abstract: CoP/CoN heterostructural active centers supported on nitrogen carbon nanorod arrays as freestanding high-performance trifunctional electrocatalysts
Paper

Multi-mode mechanoluminescence of fluoride glass ceramics from rigid to flexible media toward multi-scene mechanical sensors

First time dual-mode mechanoluminescence in fluoride glass ceramics, transitioning from rigid to flexible media for versatile mechanical sensing.

Graphical abstract: Multi-mode mechanoluminescence of fluoride glass ceramics from rigid to flexible media toward multi-scene mechanical sensors
From the themed collection: Journal of Materials Chemistry A HOT Papers
Paper

High-rate and long-life flexible aqueous rechargeable zinc-ion battery enabled by hierarchical core–shell heterostructures

TiN can optimize the conductivity of MnO2, while reducing Zn2+ diffusion barrier and improve the rate performance. The lower formation energy of Zn2+ insertion endows a capacity retention of 101.6% over 2300 cycles for the TiN@MnO2 NWAs/CC.

Graphical abstract: High-rate and long-life flexible aqueous rechargeable zinc-ion battery enabled by hierarchical core–shell heterostructures
31 items

About this collection

The design and characterization of flexible electrode materials, situated at the confluence of materials chemistry and engineering, holds pivotal significance for society. Through tailoring composition, structure, and mechanical properties, these materials optimize performance and adaptability in flexible electronics. This bears remarkable implications: from wearable health monitors to sustainable energy solutions. The historical trajectory highlights an evolution from rigid electrodes to innovative materials like conductive polymers, carbon nanotubes, and graphene. This progression, propelled by a nuanced understanding of materials chemistry, enables precise manipulation of materials properties.

The field's connection with materials chemistry lies in its ability to engineer molecular structures, surface attributes, and interfacial interactions to fine-tune conductivity, electrochemical performance, and mechanical resilience. This harmony between chemistry and engineering ensures materials not only exhibit exceptional traits but also endure real-world demands. This dynamic interplay of science and engineering catalyses wearable tech, energy storage, and beyond, showcasing the transformative potential of materials chemistry in reshaping technology and enhancing human life.

This themed collection of Journal of Materials Chemistry A, Guest Edited by Professor Xiu Song (George) Zhao (Qingdao University, China), Professor Hui Ying Yang (Singapore University of Technology and Design, Singapore) and Professor Qiang Li (Qingdao University, China), aims to provide a platform for recent developments in this field of design and characterization of flexible electrode materials. We hope that readers find this themed collection informative and useful.

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