scholarly journals Electrochemical kinetics of cerium selenide nano-pebbles: Design of device grade symmetric configured wide-potential flexible solid-state supercapacitor

2021 ◽  
Author(s):  
Bidhan Pandit ◽  
Akansha Agrawal ◽  
Priyanka Patel ◽  
Babasaheb R. Sankapal
Keyword(s):  
Free Energy ◽  
Energy Storage ◽  
Solid State ◽  
Flexible Electronics ◽  
Electrochemical Kinetics ◽  
Roll To Roll ◽  
Mechanical Bending ◽  
Kinetics Of ◽  
Wide Potential ◽  
State Of Art

Next generation portable flexible electronics appliances necessitate liquid-free energy storage supercapacitor devices to get rid of leakage along with mechanical bending compatible to roll-to-roll technologies. Hence, state of art is...

Pressure effects and solvent dynamics in the electrochemical kinetics of the tris(hexafluoroacetylacetonato)ruthenium(III)/(II) couple in nonaqueous solvents

2001 ◽  
Vol 79 (5-6) ◽  
pp. 841-847 ◽  
Author(s):  
Jinkui Zhou ◽  
Thomas W Swaddle
Keyword(s):  
Free Energy ◽  
Activation Barrier ◽  
Electrode Reaction ◽  
Pressure Effects ◽  
Electrochemical Kinetics ◽  
Free Energy Barrier ◽  
Exchange Reactions ◽  
Electrode Processes ◽  
Solvent Dynamics ◽  
Kinetics Of

Rate constants and reactant diffusion coefficients for the Ru(hfac)30/– electrode reaction have been measured at 25°C as functions of pressure (0-200 MPa) in acetone, acetonitrile, methanol, and propylene carbonate. In sharp contrast to the negative volumes of activation ΔVex‡ found for the corresponding bimolecular self-exchange reaction in organic solvents, the volumes of activation ΔVel‡ for the electrode reaction are markedly positive, ranging from 8 to 12 cm3 mol–1. The volumes of activation ΔVdiff‡ for reactant diffusion (which can be equated to the volume of activation ΔVvisc‡ for viscous flow) range from 12 to 19 cm3 mol–1. For the Debye solvents acetonitrile and acetone at least, ΔVel‡ is given within the experimental uncertainty by ΔVdiff‡ + (ΔVex‡/2). In this relation, the numerical value of ΔVdiff‡ represents indirectly the dominant contribution of solvent dynamics (solvent friction) to ΔVel‡, and ΔVex‡/2 represents the pressure dependence of the free-energy barrier height for the electrode reaction. It is proposed that solvent friction is important in nonaqueous electrode processes but not in the corresponding bimolecular self-exchange reactions because the free-energy activation barrier is twice as high in the latter.Key words: electrode reaction kinetics, solvent dynamics, electron transfer mechanisms, pressure effects, volume of activation.

Progress and perspectives on halide lithium conductors for all-solid-state lithium batteries

2020 ◽  
Vol 13 (5) ◽  
pp. 1429-1461 ◽  
Author(s):  
Xiaona Li ◽  
Jianwen Liang ◽  
Xiaofei Yang ◽  
Keegan R. Adair ◽  
Changhong Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Solid State ◽  
Lithium Batteries ◽  
Electrochemical Stability ◽  
Superionic Conductors ◽  
Fundamental Understanding ◽  
Potential Applications ◽  
Synthesis Routes

This review focuses on fundamental understanding, various synthesis routes, chemical/electrochemical stability of halide-based lithium superionic conductors, and their potential applications in energy storage as well as related challenges.

scholarly journals A SnO2QDs/GO/PPY ternary composite film as positive and graphene oxide/charcoal as negative electrodes assembled solid state asymmetric supercapacitor for high energy storage applications

RSC Advances ◽  
2021 ◽  
Vol 11 (45) ◽  
pp. 27801-27811
Author(s):  
M. Vandana ◽  
Y. S. Nagaraju ◽  
H. Ganesh ◽  
S. Veeresh ◽  
H. Vijeth ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Solid State ◽  
Composite Film ◽  
High Energy ◽  
Asymmetric Supercapacitor ◽  
Ternary Composite ◽  
Negative Electrodes ◽  
Energy Storage Applications ◽  
High Energy Storage

Representation of the synthesis steps of SnO2QDs/GO/PPY ternary composites and SnO2QDs/GO/PPY//GO/charcoal asymmetric supercapacitor device.

Electrochemical Kinetics of Ag|Ag+and TMPD|TMPD+•in the Room-Temperature Ionic Liquid [C4mpyrr][NTf2]; toward Optimizing Reference Electrodes for Voltammetry in RTILs

2007 ◽  
Vol 111 (37) ◽  
pp. 13957-13966 ◽  
Author(s):  
Emma I. Rogers ◽  
Debbie S. Silvester ◽  
Sarah E. Ward Jones ◽  
Leigh Aldous ◽  
Christopher Hardacre ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Electrochemical Kinetics ◽  
Reference Electrodes ◽  
Kinetics Of

scholarly journals Solid-State Ball-Milling of Co3O4 Nano/Microspheres and Carbon Black Endorsed LaMnO3 Perovskite Catalyst for Bifunctional Oxygen Electrocatalysis

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 76
Author(s):  
Chelladurai Karuppiah ◽  
Balamurugan Thirumalraj ◽  
Srinivasan Alagar ◽  
Shakkthivel Piraman ◽  
Ying-Jeng Jame Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Energy Storage ◽  
Fuel Cell ◽  
Solid State ◽  
Carbon Black ◽  
Ball Milling ◽  
Potential Candidate ◽  
X Ray ◽  
Bifunctional Electrocatalyst ◽  
Bet Analysis

Developing a highly stable and non-precious, low-cost, bifunctional electrocatalyst is essential for energy storage and energy conversion devices due to the increasing demand from the consumers. Therefore, the fabrication of a bifunctional electrocatalyst is an emerging focus for the promotion and dissemination of energy storage/conversion devices. Spinel and perovskite transition metal oxides have been widely explored as efficient bifunctional electrocatalysts to replace the noble metals in fuel cell and metal-air batteries. In this work, we developed a bifunctional catalyst for oxygen reduction and oxygen evolution reaction (ORR/OER) study using the mechanochemical route coupling of cobalt oxide nano/microspheres and carbon black particles incorporated lanthanum manganite perovskite (LaMnO3@C-Co3O4) composite. It was synthesized through a simple and less-time consuming solid-state ball-milling method. The synthesized LaMnO3@C-Co3O4 composite was characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy, Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction spectroscopy, and micro-Raman spectroscopy techniques. The electrocatalysis results showed excellent electrochemical activity towards ORR/OER kinetics using LaMnO3@C-Co3O4 catalyst, as compared with Pt/C, bare LaMnO3@C, and LaMnO3@C-RuO2 catalysts. The observed results suggested that the newly developed LaMnO3@C-Co3O4 electrocatalyst can be used as a potential candidate for air-cathodes in fuel cell and metal-air batteries.

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