Film deposition mechanisms and properties of optically active chelating polymer and composites

Liu, Yangshuai; Luo, Dan; Zhang, Tianshi; Shi, Kaiyuan; Wojtal, Patrick; Wallar, C. J.; Ma, Qianli; Daigle, Eric Gustave; Kitai, Adrian H.; Xu, Chang‐Qing; Zhitomirsky, Igor

doi:10.1016/j.colsurfa.2015.09.057

Cited by 10 publications

(5 citation statements)

References 56 publications

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“…In one approach an EPD procedure was developed for commercially available azobenzene-containing Poly[1-[4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2-ethanediyl] by employing the inherent negatively charged ionic group that could respond to applied electric field. 22 However, we found that this polymer did not exhibit favorable solar thermal fuel properties in terms of energy density or chargeability. In fact, it was found that the additional functional groups decorating the benzene rings of the azobenzene molecule that impart the favorable EPD properties, simultaneously limit its energy storage by greatly curtailing the storage lifetime.…”

Section: ■ Resultsmentioning

confidence: 79%

“…Literature reports remain sparse with respect to EPD of small molecules and azobenzene-containing moieties in particular. , Generally, in order to deposit robust EPD films, a high molecular weight polymer is desirable. In one approach an EPD procedure was developed for commercially available azobenzene-containing Poly[1-[4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2-ethanediyl] by employing the inherent negatively charged ionic group that could respond to applied electric field . However, we found that this polymer did not exhibit favorable solar thermal fuel properties in terms of energy density or chargeability.…”

Section: Resultsmentioning

confidence: 99%

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Conformal Electroplating of Azobenzene-Based Solar Thermal Fuels onto Large-Area and Fiber Geometries

Zhitomirsky

Grossman

2016

ACS Appl. Mater. Interfaces

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There is tremendous growth in fields where small functional molecules and colloidal nanomaterials are integrated into thin films for solid-state device applications. Many of these materials are synthesized in solution and there often exists a significant barrier to transition them into the solid state in an efficient manner. Here, we develop a methodology employing an electrodepositable copolymer consisting of small functional molecules for applications in solar energy harvesting and storage. We employ azobenzene solar thermal fuel polymers and functionalize them to enable deposition from low concentration solutions in methanol, resulting in uniform and large-area thin films. This approach enables conformal deposition on a variety of conducting substrates that can be either flat or structured depending on the application. Our approach further enables control over film growth via electrodepsition conditions and results in highly uniform films of hundreds of nanometers to microns in thickness. We demonstrate that this method enables superior retention of solar thermal fuel properties, with energy densities of ∼90 J/g, chargeability in the solid state, and exceptional materials utilization compared to other solid-state processing approaches. This novel approach is applicable to systems such as photon upconversion, photovoltaics, photosensing, light emission, and beyond, where small functional molecules enable solid-state applications.

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Section: ■ Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Conformal Electroplating of Azobenzene-Based Solar Thermal Fuels onto Large-Area and Fiber Geometries

Zhitomirsky

Grossman

2016

ACS Appl. Mater. Interfaces

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“…134 Some authors overcame most of these issues by using aqueous-based polyelectrolytes successfully such as poly[1-[4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2-ethanediyl, sodium salt] (PAZO-Na) and carboxymethyl cellulose sodium salt (CMC-Na) for the EPD of a range of different substances, like CNTs, oxides, polymers and hydroxides. 135,136 In a more recent study, the EPD LFP electrode, displayed a capacity of 146.7 mA h g À1 at a C-rate of C/10 along with steady long-term charge/discharge successive cycling performance. 134 Similarly, Cohen and co-workers prepared a membrane-electrode-architecture by coating Celgard separators with LFP (positive electrode) and LTO (negative electrode) by means of a concurrent EPD method.…”

Section: Lithium-ion Batteries (Libs)mentioning

confidence: 97%

“…Some complications were highlighted due to the development of uniformly charged colloidal formulations during EPD of LFP with conductive additives, which negatively affected the adsorption of dispersants and binders on the particles, thereby inhibiting the formation of adherent surface coatings 134 . Some authors overcame most of these issues by using aqueous‐based polyelectrolytes successfully such as poly[1‐[4‐(3‐carboxy‐4‐hydroxyphenylazo)benzenesulfonamido]‐1,2‐ethanediyl, sodium salt] (PAZO‐Na) and carboxymethyl cellulose sodium salt (CMC‐Na) for the EPD of a range of different substances, like CNTs, oxides, polymers and hydroxides 135,136 . In a more recent study, the EPD LFP electrode, displayed a capacity of 146.7 mA h g −1 at a C‐rate of C/10 along with steady long‐term charge/discharge successive cycling performance 134 .…”

Section: Research Discovery and Innovation Activities On Epd For Ees ...mentioning

confidence: 99%

Modern practices in electrophoretic deposition to manufacture energy storage electrodes

Chakrabarti

Gençten

Bree

et al. 2022

Intl J of Energy Research

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The applications of electrophoretic deposition (EPD) to the development of electrochemical energy storage (EES) devices such as batteries and supercapacitors are reviewed. A discussion on the selection of parameters for optimizing EPD electrode performance, such as light-directed EPD, co-deposition of active materials such as metal oxides and materials manufactured with high porosity and fibrous properties is highlighted. Additionally, means for overcoming obstacles in the improvement of the mechanical properties, conductivity and surface area of EES materials are discussed. The exceptional benefits of EPD such as low cost, small processing time, simple apparatus requirements, homogeneous coatings, binder-free deposits and selective modification associated with thickness and mass loadings leading to effective EES electrode materials are highlighted. Finally, EPD processes have evolved as modern manufacturing tools to produce technologically improved solid electrolytes and separators for lithium-ion and/or sodium-ion batteries, and further research and development programmes are encouraged towards industrialisation.

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“…Previous investigation [5] has shown that charged molecules with chelating ligands provide efficient dispersion of oxide nanoparticles. Since molecules with single chelating ligands lead to relatively weak interactions with the particle surface, the efficient dispersion of relatively large nanotubes requires stronger adsorption of the dispersant, such as the one containing multiple chelating ligands [25,26]. The chelating polyelectrolyte, PAZO (figure 5(a)) is a dispersing agent that was recently employed for the efficient dispersion and colloidal processing of the nanoparticles [25,26].…”

Section: Stability Of the Colloidal Suspensionmentioning

confidence: 99%

Nickel oxide nanotube synthesis using multiwalled carbon nanotubes as sacrificial templates for supercapacitor application

et al. 2017

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A novel approach for the fabrication of nickel oxide nanotubes based on multiwalled carbon nanotubes as a sacrificial template is described. Electroless deposition is employed to deposit nickel onto carbon nanotubes. The subsequent annealing of the product in the presence of air oxidizes nickel to nickel oxide, and carbon is released as gaseous carbon dioxide, leaving behind nickel oxide nanotubes. Electron microscopy and elemental mapping confirm the formation of nickel oxide nanotubes. New chelating polyelectrolytes are used as dispersing agents to achieve high colloidal stability for both the nickel-coated carbon nanotubes and the nickel oxide nanotubes. A gravimetric specific capacitance of 245.3 F g and an areal capacitance of 3.28 F cm at a scan rate of 2 mV s is achieved, with an electrode fabricated using nickel oxide nanotubes as the active element with a mass loading of 24.1 mg cm.

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Film deposition mechanisms and properties of optically active chelating polymer and composites

Cited by 10 publications

References 56 publications

Conformal Electroplating of Azobenzene-Based Solar Thermal Fuels onto Large-Area and Fiber Geometries

Conformal Electroplating of Azobenzene-Based Solar Thermal Fuels onto Large-Area and Fiber Geometries

Modern practices in electrophoretic deposition to manufacture energy storage electrodes

Nickel oxide nanotube synthesis using multiwalled carbon nanotubes as sacrificial templates for supercapacitor application

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