Carbon nanotube conductive additives for improved electrical and mechanical properties of flexible battery electrodes

Jessl, Sarah; Beesley, David; Engelke, Simon; Valentine, Christopher; Stallard, Joe C.; Fleck, N.A.; Ahmad, Shahab; Cole, Matthew T.; Volder, Michaël De

doi:10.1016/j.msea.2018.08.033

Cited by 26 publications

(14 citation statements)

References 49 publications

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“…Sun et al (2015) demonstrated that the application of CNTs to a graphene surface not only increased the surfaces overall roughness but also improved the electrical conductivity between the surface and the CNTs via the introduction of a greater number of enzyme active sites for increased biocatalytic activity [40,41]. This was particularly important, as this increase in conductivity aided in the measurements of lower analyte concentrations, thus increasing overall device sensitivity [42].…”

Section: Surface Roughness and Wettabilitymentioning

confidence: 99%

Diamine Oxidase-Conjugated Multiwalled Carbon Nanotubes to Facilitate Electrode Surface Homogeneity

Amin

Abdullah

Rowley‐Neale

et al. 2022

Sensors

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Carbon nanomaterials have gained significant interest over recent years in the field of electrochemistry, and they may be limited in their use due to issues with their difficulty in dispersion. Enzymes are prime components for detecting biological molecules and enabling electrochemical interactions, but they may also enhance multiwalled carbon nanotube (MWCNT) dispersion. This study evaluated a MWCNT and diamine oxidase enzyme (DAO)-functionalised screen-printed electrode (SPE) to demonstrate improved methods of MWCNT functionalisation and dispersion. MWCNT morphology and dispersion was determined using UV-Vis spectroscopy (UV-Vis) and scanning electron microscopy (SEM). Carboxyl groups were introduced onto the MWCNT surfaces using acid etching. MWCNT functionalisation was carried out using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) and N-Hydroxysuccinimide (NHS), followed by DAO conjugation and glutaraldehyde (GA) crosslinking. Modified C-MWNCT/EDC-NHS/DAO/GA was drop cast onto SPEs. Modified and unmodified electrodes after MWCNT functionalisation were characterised using optical profilometry (roughness), water contact angle measurements (wettability), Raman spectroscopy and energy dispersive X-ray spectroscopy (EDX) (vibrational modes and elemental composition, respectively). The results demonstrated that the addition of the DAO improved MWCNT homogenous dispersion and the solution demonstrated enhanced stability which remained over two days. Drop casting of C-MWCNT/EDC-NHS/DAO/GA onto carbon screen-printed electrodes increased the surface roughness and wettability. UV-Vis, SEM, Raman and EDX analysis determined the presence of carboxylated MWCNT variants from their non-carboxylated counterparts. Electrochemical analysis demonstrated an efficient electron transfer rate process and a diffusion-controlled redox process. The modification of such electrodes may be utilised for the development of biosensors which could be utilised to support a range of healthcare related fields.

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Section: Surface Roughness and Wettabilitymentioning

confidence: 99%

Diamine Oxidase-Conjugated Multiwalled Carbon Nanotubes to Facilitate Electrode Surface Homogeneity

Amin

Abdullah

Rowley‐Neale

et al. 2022

Sensors

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“…Raw CNTs and graphene are typically in microscopy size (less than tens of microns) and are obtained in the form of powders. Hence, they are initially used as conductive additives and/or substrates to synthesize nanocomposites, [29] which are prepared into an ink/slurry to be cast on a current collector for making electrode. Owing to the 1D fibrous structure with a large aspect ratio (CNTs) and 2D nanosheet structure (graphene), CNTs and graphene can be easily assembled into monolithic bulks by methods such as templated synthesis and self‐assembly.…”

Section: Carbon‐based Flexible Electrodesmentioning

confidence: 99%

An Overview of Flexible Electrode Materials/Substrates for Flexible Electrochemical Energy Storage/Conversion Devices

et al. 2021

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The rise of portable and wearable electronics has largely stimulated the development of flexible energy storage and conversion devices. As one of the essential parts, the electrode plays critical role in determining the device performance, which required to be highly flexible, light‐weight, and conformable for flexible and wearable applications. However, it remains a formidable challenge in the design of appropriate flexible electrodes. Thus, considerable effort has been making to develop various flexible materials/substrates to fabricate flexible energy devices. Here, this review aims to provide a comprehensive survey on the recently developed free‐standing and flexible electrode materials/substrates for flexible electrochemical energy storage devices, which are categorized into four different types including metal‐based, carbon‐based, polymer‐based, and micro‐patterned flexible electrodes. The specific characteristics, fabrication methods, properties, and pros and cons of each type of materials are thoroughly analysed. Furthermore, challenges and future directions for designing flexible electrode materials are also discussed.

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“…α ‐Fe 2 O 3 anodes based conventional LIBs showed stable performance with a specific capacity of 650 mAh g −1 after 200 cycles at a current rate of 1000 mA g −1 , which is attributed to the nanoporous network and improved interfacial properties of CNTs and Fe 2 O 3 NRs. [ 37 ] The demonstrated Li‐PRB shown enhancements upto 92.96% in the specific capacities as a result of the light illumination at a current rate of 2000 mA g −1 . The photocharging effect is also confirmed by performing various in situ measurements such as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and tracking the state of charge (SOC) under dark and light conditions.…”

Section: Introductionmentioning

confidence: 99%

High Performance Photorechargeable Li‐Ion Batteries Based on Nanoporous Fe₂O₃ Photocathodes

Chamola

Ahmad

2023

Advanced Sustainable Systems

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In recent years, photorechargeable Li‐ion batteries (Li‐PRBs) are investigated as potential energy devices to supply continuous power to remote IoT or electronic devices. These Li‐PRBs, due to their lightweight and low‐cost, offers various advantages compared to conventional combination of solar cells and a battery. Single active material‐based PRBs have gained attention due to the use of multifunctional materials which perform both solar energy harvesting and storage, however most of the PRBs studied so far are based on ion intercalation. Herein, the use of conversion type active material α‐Fe2O3 for efficient and stable operation of Li‐PRBs is demonstrated. Cost‐effective solution processing method is used to synthesize α‐Fe2O3 nanorods (NRs), which form nanoporous morphology when blended with Multi‐walled carbon nanotubes / Phenyl‐C61 butyric acid methyl ester (MWCNT/PCBM) conducting additives to form photocathodes. α‐Fe2O3 NRs shown simultaneous solar energy harvesting in visible region of spectra, owing to its energy bandgap Eg ≈ 2.1 eV, and efficient Li‐ion storage via conversion reaction mechanism. Li‐PRB has shown photoconversion and storage efficiency of ≈1.988% when illuminated with blue LED (λex ≈ 470 nm) for large voltage window (0.8–2.57 V). The use of conversion type material like Fe2O3 in PRBs opens up new pathways to explore new materials and mechanisms for these emerging devices.

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Carbon nanotube conductive additives for improved electrical and mechanical properties of flexible battery electrodes

Cited by 26 publications

References 49 publications

Diamine Oxidase-Conjugated Multiwalled Carbon Nanotubes to Facilitate Electrode Surface Homogeneity

Diamine Oxidase-Conjugated Multiwalled Carbon Nanotubes to Facilitate Electrode Surface Homogeneity

An Overview of Flexible Electrode Materials/Substrates for Flexible Electrochemical Energy Storage/Conversion Devices

High Performance Photorechargeable Li‐Ion Batteries Based on Nanoporous Fe₂O₃ Photocathodes

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Carbon nanotube conductive additives for improved electrical and mechanical properties of flexible battery electrodes

Cited by 26 publications

References 49 publications

Diamine Oxidase-Conjugated Multiwalled Carbon Nanotubes to Facilitate Electrode Surface Homogeneity

Diamine Oxidase-Conjugated Multiwalled Carbon Nanotubes to Facilitate Electrode Surface Homogeneity

An Overview of Flexible Electrode Materials/Substrates for Flexible Electrochemical Energy Storage/Conversion Devices

High Performance Photorechargeable Li‐Ion Batteries Based on Nanoporous Fe2O3 Photocathodes

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Resources

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High Performance Photorechargeable Li‐Ion Batteries Based on Nanoporous Fe₂O₃ Photocathodes