A Comparative Evaluation of Sustainable Binders for Environmentally Friendly Carbon-Based Supercapacitors

Environmentally friendly energy storage devices have been fabricated by using functional materials obtained from completely renewable resources. Gelatin, chitosan, casein, guar gum and carboxymethyl cellulose have been investigated as sustainable and low-cost binders within the electrode active material of water-processable symmetric carbon-based supercapacitors. Such binders are selected from natural-derived materials and industrial by-products to obtain economic and environmental benefits. The electrochemical properties of the devices based on the different binders are compared by using cyclic voltammetry, galvanostatic charge/discharge curves and impedance spectroscopy. The fabricated supercapacitors exhibit series resistance lower than a few ohms and values of the specific capacitance ranged between 30 F/g and 80 F/g. The most performant device can deliver ca. 3.6 Wh/kg of energy at a high power density of 3925 W/kg. Gelatin, casein and carboxymethyl cellulose-based devices have shown device stability up to 1000 cycles. Detailed analysis on the charge storage mechanisms (e.g., involving faradaic and non-faradaic processes) at the electrode/electrolyte interface reveals a pseudocapacitance behavior within the supercapacitors. A clear correlation between the electrochemical performances (e.g., cycle stability, capacitance retention, series resistance value, coulombic efficiency) ageing phenomena and charge storage mechanisms within the porous carbon-based electrode have been discussed.

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Optical, electrochemical and photocatalytic properties of cobalt doped CsPbCl3 nanostructures: a one-pot synthesis approach

Scientific Reports ◽

10.1038/s41598-021-95088-2 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Aadil Ahmad Bhat ◽

Shakeel Ahmad Khandy ◽

Ishtihadah Islam ◽

Radha Tomar

Keyword(s):

Optical Properties ◽

Visible Light ◽

Active Material ◽

Blue Emission ◽

Structural Features ◽

Ion Concentration ◽

Photocatalytic Properties ◽

Charge Storage ◽

Cobalt Doping ◽

One Pot

AbstractThe present manuscript aims at the synthesis of cesium based halide perovskite nanostructures and the effect of cobalt doping on the structural, optical, lumnisent, charge storage and photocatalytic properties. In a very first attempt, we report the solvothermal synthesis of Co doped CsPbCl3 nanostructures under subcritical conditions. The structural features were demonstrated by X-ray diffraction (XRD) Surface morphology determined cubic shape of the synthesized particles. Doping is an excellent way to modify the properties of host material in particular to the electronic structure or optical properties. Incorporation of Co2+ ions in the perovskite structure tunes the optical properties of the nanostructures making this perovskite a visible light active material (Eg = 1.6 eV). This modification in the optical behaviour is the result of size effect, the crystallite size of the doped nanostructures increases with cobalt doping concentration. Photolumniscance (PL) study indicated that CsPbCl3 exhibited Blue emission. Thermogravametric analysis (TGA) revealed that the nanostructures are quite stable at elavated temperatures. The electrochemical performance depicts the pseudocapacative nature of the synthesized nanostructures and can used for charge storage devices. The charge storage capability showed direct proportionality with cobalt ion concentration. And Finally the photocatalytic performance of synthesized material shows superior catalytic ability degrading 90% of methylene blue (MB) dye in 180 min under visible light conditions.

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Mesoscopic simulations of the in situ NMR spectra of porous carbon based supercapacitors: Electronic structure and adsorbent reorganisation effects

Physical Chemistry Chemical Physics ◽

10.1039/d1cp02130c ◽

2021 ◽

Author(s):

Anagha Sasikumar ◽

Anouar Belhboub ◽

Camille Bacon ◽

Alexander C. Forse ◽

John Griffin ◽

...

Keyword(s):

Electronic Structure ◽

Nmr Spectroscopy ◽

Molecular Species ◽

Porous Carbon ◽

Nmr Spectra ◽

Charge Storage ◽

In Situ Nmr Spectroscopy ◽

In Situ Nmr ◽

Carbon Based

In situ NMR spectroscopy is a powerful technique to investigate charge storage mechanisms in carbon-based supercapacitors thanks to its ability to distinguish ionic and molecular species adsorbed in the porous...

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Preparation and Electrochemical Performances of Calcium Zincate Synthesized by Microwave Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.236-238.868 ◽

2011 ◽

Vol 236-238 ◽

pp. 868-871 ◽

Cited By ~ 1

Author(s):

Meng Liang Tong ◽

Xuan Yan Liu

Keyword(s):

Cyclic Voltammetry ◽

Active Material ◽

Electrochemical Performances ◽

Microwave Method ◽

X Ray ◽

Battery Charge ◽

Secondary Battery ◽

Initial Capacity ◽

Charge Discharge ◽

Discharge Test

Calcium zincate as an active material in Zn/Ni secondary battery has been successfully synthesized by microwave method. The chemical composition of Ca(OH)2·2Zn(OH)2·2H2O was confirmed by X-ray powder diffraction pattern and weight loss in thermogravimetric analysis.The results of cyclic voltammetry and experimental Zn/Ni battery charge–discharge test showed that the material of calcium zincate had excellent electrochemical performances: a high discharging platform of 1.685 V and a good cycleability, discharge capacity would be 70.0% of initial capacity after circulated 120 times.

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Recent achievements in enhancing anaerobic digestion with carbon- based functional materials

Bioresource Technology ◽

10.1016/j.biortech.2018.07.076 ◽

2018 ◽

Vol 266 ◽

pp. 555-567 ◽

Cited By ~ 54

Author(s):

Jishi Zhang ◽

Wenqian Zhao ◽

Huiwen Zhang ◽

Zejie Wang ◽

Chuanfang Fan ◽

...

Keyword(s):

Anaerobic Digestion ◽

Functional Materials ◽

Carbon Based

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Consumer perceptions of environmentally friendly products

South African Journal of Business Management ◽

10.4102/sajbm.v25i2.843 ◽

1994 ◽

Vol 25 (2) ◽

pp. 59-64

Author(s):

M. T. Bendixen ◽

M. Sandler ◽

D. Seligman

Keyword(s):

Exploratory Study ◽

Environmentally Friendly ◽

Consumer Perceptions ◽

Environmental Benefits ◽

Green Products ◽

Political Issue ◽

The Past ◽

The World ◽

Developed Nations

During the past decade, concern for the environment has emerged as a major socio-political issue among developed nations throughout the world and the increase in the number of environmentally friendly or 'green' products has been significant. The purpose of this exploratory study was to determine the types of products that are considered to be environmentally friendly as well as establishing consumer perceptions of these products. One of the main findings of the research was that 'green' products have achieved substantial awareness among consumers and they are not regarded as a gimmick or a fad. It was also established that the two main barriers that discouraged consumers from purchasing 'green' products were a perception that such products were not price competitive and scepticism regarding their supposed environmental benefits.

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Challenges in Design and Fabrication of Flexible/Stretchable Carbon- and Textile-Based Wearable Sensors for Health Monitoring: A Critical Review

Sensors ◽

10.3390/s20143927 ◽

2020 ◽

Vol 20 (14) ◽

pp. 3927 ◽

Cited By ~ 2

Author(s):

Jae Sang Heo ◽

Md Faruk Hossain ◽

Insoo Kim

Keyword(s):

Mechanical Properties ◽

Human Activity ◽

Health Monitoring ◽

Critical Review ◽

Wearable Sensors ◽

Functional Materials ◽

Effective Strategies ◽

Mechanical Performances ◽

Carbon Based

To demonstrate the wearable flexible/stretchable health-monitoring sensor, it is necessary to develop advanced functional materials and fabrication technologies. Among the various developed materials and fabrication processes for wearable sensors, carbon-based materials and textile-based configurations are considered as promising approaches due to their outstanding characteristics such as high conductivity, lightweight, high mechanical properties, wearability, and biocompatibility. Despite these advantages, in order to realize practical wearable applications, electrical and mechanical performances such as sensitivity, stability, and long-term use are still not satisfied. Accordingly, in this review, we describe recent advances in process technologies to fabricate advanced carbon-based materials and textile-based sensors, followed by their applications such as human activity and electrophysiological sensors. Furthermore, we discuss the remaining challenges for both carbon- and textile-based wearable sensors and then suggest effective strategies to realize the wearable sensors in health monitoring.

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Carbon based tool coatings as an approach for environmentally friendly metal forming processes

Wear ◽

10.1016/j.wear.2005.04.026 ◽

2006 ◽

Vol 260 (3) ◽

pp. 287-295 ◽

Cited By ~ 29

Author(s):

F. Klocke ◽

T. Maßmann ◽

K. Bobzin ◽

E. Lugscheider ◽

N. Bagcivan

Keyword(s):

Metal Forming ◽

Environmentally Friendly ◽

Tool Coatings ◽

Carbon Based

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Preparation, structure and electrochemical performances of nanosized cathode active material Ni(OH)

Solid State Ionics ◽

10.1016/j.ssi.2005.06.003 ◽

2005 ◽

Vol 176 (23-24) ◽

pp. 1909-1914 ◽

Cited By ~ 34

Author(s):

H ZHOU ◽

Z ZHOU

Keyword(s):

Active Material ◽

Electrochemical Performances

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Study of Carbon Nanotubes for Lithium-Ion Batteries Application

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.72.299 ◽

2010 ◽

Vol 72 ◽

pp. 299-304

Author(s):

Alberto Varzi ◽

Corina Täubert ◽

Margret Wohlfahrt-Mehrens ◽

Martin Kreis ◽

Walter Schütz

Keyword(s):

Carbon Nanotubes ◽

Active Material ◽

Chemical Vapour ◽

Rate Capability ◽

Lithium Ion ◽

Electrochemical Performances ◽

Negative Electrodes ◽

Multi Walled Carbon Nanotubes ◽

Li Ion ◽

Walled Carbon Nanotubes

The potential use of multi-walled carbon nanotubes (MWCNTs) produced by chemical vapour deposition (CVD) as a conductive agent for electrodes in Li-ion batteries has been investigated. LiNi0.33Co0.33Mn0.33O2 (NCM) has been chosen as active material for positive electrodes, and a nano-sized TiO2-rutile for the negative electrodes. The electrochemical performances of the electrodes were studied by galvanostatic techniques and especially the influence of the nanotubes on the rate capability and cycling stability has been evaluated. The addition of MWCNTs significantly enhanced the rate performances of both positive and negative electrodes and improved the capacity retention upon cycling. The obtained results demonstrated that the addition of MWCNTs in low amounts to the electrode composition enables an increase in both energy and power density of a Li-ion battery.

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