Structural composite supercapacitor using carbon nanotube mat electrodes with interspersed metallic iron nanoparticles

Mapleback, Benjamin; Simons, Tristan J.; Shekibi, Youssof; Ghorbani, Kamran; Rider, Andrew N.

doi:10.1016/j.electacta.2019.135233

Cited by 26 publications

(21 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CVs shown in Figure c,d compare the uncoated glass separator and the EPD BNNT separator, which were coated with BNNT/hBN using EPD. Both CVs show similar shapes and performances and maintain pseudocapacitance from the iron nanoparticles in the CNT mat electrodes, which have previously been characterized . The small increase in resistance added by the BNNT is seen in Figure d at the 0 and 3 V ends of the voltammogram, which are not as sharp a transition as that of the uncoated separator.…”

Section: Resultssupporting

confidence: 68%

“…The small increase in resistance added by the BNNT is seen in Figure d at the 0 and 3 V ends of the voltammogram, which are not as sharp a transition as that of the uncoated separator. Encouragingly, the pseudocapacitive processes present due to the electrode and electrolyte chemistry are not inhibited by the presence of the BNNT/hBN coating, which maintains the capacitance achievable by the electrode. While the coating does lead to some reduction in performance, the devices showed increased robustness and reliability when the BNNT/hBN film was present, suggesting a reduction in transport of the free CNTs from the electrode that can lead to device shorting.…”

Section: Resultsmentioning

confidence: 97%

See 1 more Smart Citation

Development of Stable Boron Nitride Nanotube and Hexagonal Boron Nitride Dispersions for Electrophoretic Deposition

et al. 2020

Self Cite

View full text Add to dashboard Cite

Boron nitride nanotubes (BNNTs) represent a relatively new class of materials that provides alternative electrical and thermal properties to the carbon analogue. The high chemical and thermal stability and large band gap combined with high electrical resistance make BNNTs desirable in several thin-film applications. In this study, stable BNNT and hexagonal boron nitride (hBN) particle dispersions have been developed using environmentally friendly advanced oxidation processing (AOP) that can be further modified for electrophoretic deposition (EPD) to produce thin films. The characterization of the dispersions has revealed how the hydroxyl radicals produced in AOP react with BNNT/hBN and contaminant boron nanoparticles (BNPs). While the radicals remove the carbon contaminant present on BNNT/ hBN and increase dispersion stability, they also oxidize the BNPs and the boron oxide produced, which, conversely, reduces the dispersion stability. The use of high-or low-powered ultrasonication in combination with the AOP affects the rate of the competing reactions, with low-powered sonication and AOP providing the best combination for producing stable dispersions with high concentrations. BNNT/hBN dispersions were functionalized with polyethyleneimine to facilitate EPD, where films of several micrometer thickness were readily deposited onto stainless steel and glass-fiber fabrics. BNNT/hBN films produced on glass fabrics by EPD exhibited a consistent through-thickness macroporosity that was facilitated by platelet and nanotube stacking. The film macroporosity present on the coated fabrics was suitable for use as separator layers in supercapacitors and provided improved device robustness with a minimal impact on electrochemical performance.

show abstract

Section: Resultssupporting

confidence: 68%

Section: Resultsmentioning

confidence: 97%

Development of Stable Boron Nitride Nanotube and Hexagonal Boron Nitride Dispersions for Electrophoretic Deposition

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although these metal nanoparticles could be considered as "heteroatoms" for the carbon matrix, we believe the most appropriate term in this case is "decoration with metal nanoparticles." [93][94][95][96] The doped and functionalized carbon nanostructures are extensively synthesized by various techniques which is outside the scope of the present review. The adsorption energy of boron (−1.268 eV), Si (−1.244 eV), and nitrogen (−2.372 eV) on the pristine graphene ensures the stable adsorption of adatoms on graphene.…”

Section: The Limited Density Of States At the Fermi Level (Dos(e F ))mentioning

confidence: 99%

Heteroatom‐Doped and Oxygen‐Functionalized Nanocarbons for High‐Performance Supercapacitors

Ghosh

Barg

Jeong

et al. 2020

Advanced Energy Materials

430

237

View full text Add to dashboard Cite

Electrochemical capacitors (best known as supercapacitors) are high‐performance energy storage devices featuring higher capacity than conventional capacitors and higher power densities than batteries, and are among the key enabling technologies of the clean energy future. This review focuses on performance enhancement of carbon‐based supercapacitors by doping other elements (heteroatoms) into the nanostructured carbon electrodes. The nanocarbon materials currently exist in all dimensionalities (from 0D quantum dots to 3D bulk materials) and show good stability and other properties in diverse electrode architectures. However, relatively low energy density and high manufacturing cost impede widespread commercial applications of nanocarbon‐based supercapacitors. Heteroatom doping into the carbon matrix is one of the most promising and versatile ways to enhance the device performance, yet the mechanisms of the doping effects still remain poorly understood. Here the effects of heteroatom doping by boron, nitrogen, sulfur, phosphorus, fluorine, chlorine, silicon, and functionalizing with oxygen on the elemental composition, structure, property, and performance relationships of nanocarbon electrodes are critically examined. The limitations of doping approaches are further discussed and guidelines for reporting the performance of heteroatom doped nanocarbon electrode‐based electrochemical capacitors are proposed. The current challenges and promising future directions for clean energy applications are discussed as well.

show abstract

“…Many researchers have developed pseudocapacitors, by coating carbon electrodes with powders or films that can store charge through surface adsorption/desorption of ions, redox reactions with the electrolyte, or doping/undoping of the electrode materials. Modifications to improve pseudocapacitive behavior have included functional groups ( Ganguly et al, 2020 ), conductive polymers ( Benson et al, 2013 ; Liu et al, 2016 ; Shi et al, 2016 ; Hudak et al, 2017 ; Flouda et al, 2019b ; Javaid et al, 2021 ), metal particles ( Mapleback et al, 2020 ), and metal oxides ( Deka et al, 2016 ; Liu et al, 2016 ; Deka et al, 2017b ; Choi et al, 2017 ; Deka et al, 2019 ; Sha et al, 2021 ).…”

Section: Current Statusmentioning

confidence: 99%

Designing Structural Electrochemical Energy Storage Systems: A Perspective on the Role of Device Chemistry

Navarro‐Suárez

Shaffer

2022

Front. Chem.

View full text Add to dashboard Cite

Structural energy storage devices (SESDs), designed to simultaneously store electrical energy and withstand mechanical loads, offer great potential to reduce the overall system weight in applications such as automotive, aircraft, spacecraft, marine and sports equipment. The greatest improvements will come from systems that implement true multifunctional materials as fully as possible. The realization of electrochemical SESDs therefore requires the identification and development of suitable multifunctional structural electrodes, separators, and electrolytes. Different strategies are available depending on the class of electrochemical energy storage device and the specific chemistries selected. Here, we review existing attempts to build SESDs around carbon fiber (CF) composite electrodes, including the use of both organic and inorganic compounds to increase electrochemical performance. We consider some of the key challenges and discuss the implications for the selection of device chemistries.

show abstract

Structural composite supercapacitor using carbon nanotube mat electrodes with interspersed metallic iron nanoparticles

Cited by 26 publications

References 64 publications

Development of Stable Boron Nitride Nanotube and Hexagonal Boron Nitride Dispersions for Electrophoretic Deposition

Development of Stable Boron Nitride Nanotube and Hexagonal Boron Nitride Dispersions for Electrophoretic Deposition

Heteroatom‐Doped and Oxygen‐Functionalized Nanocarbons for High‐Performance Supercapacitors

Designing Structural Electrochemical Energy Storage Systems: A Perspective on the Role of Device Chemistry

Contact Info

Product

Resources

About