scholarly journals Variation of Interfacial Capacitance in PEDOT-PSS Films

2020 ◽  
Vol 13 (13) ◽  
pp. 28-33
Author(s):  
Bindu S
Keyword(s):  
Interfacial Capacitance

Charge Storage in Graphene Oxide: Impact of the Cation on Ion Permeability and Interfacial Capacitance

2020 ◽  
Vol 92 (15) ◽  
pp. 10300-10307 ◽  
Author(s):  
Waldemir J. Paschoalino ◽  
Nicholas A. Payne ◽  
Tatiana M. Pessanha ◽  
Samantha M. Gateman ◽  
Lauro T. Kubota ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Charge Storage ◽  
Ion Permeability ◽  
Interfacial Capacitance

scholarly journals Specific ion effects at graphitic interfaces

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Cheng Zhan ◽  
Maira R. Cerón ◽  
Steven A. Hawks ◽  
Minoru Otani ◽  
Brandon C. Wood ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Water Desalination ◽  
Interfacial Structure ◽  
Ion Hydration ◽  
Specific Ion Effects ◽  
Solvated Ions ◽  
Interfacial Capacitance ◽  
Ion Effects ◽  
Slit Pores ◽  
Interfacial Charge

Abstract Improved understanding of aqueous solutions at graphitic interfaces is critical for energy storage and water desalination. However, many mechanistic details remain unclear, including how interfacial structure and response are dictated by intrinsic properties of solvated ions under applied voltage. In this work, we combine hybrid first-principles/continuum simulations with electrochemical measurements to investigate adsorption of several alkali-metal cations at the interface with graphene and within graphene slit-pores. We confirm that adsorption energy increases with ionic radius, while being highly dependent on the pore size. In addition, in contrast with conventional electrochemical models, we find that interfacial charge transfer contributes non-negligibly to this interaction and can be further enhanced by confinement. We conclude that the measured interfacial capacitance trends result from a complex interplay between voltage, confinement, and specific ion effects-including ion hydration and charge transfer.

scholarly journals How to measure and report the capacity of electrochemical double layers, supercapacitors, and their electrode materials

2020 ◽  
Vol 24 (11-12) ◽  
pp. 3215-3230 ◽  
Author(s):  
Yuru Ge ◽  
Xuan Xie ◽  
Jessica Roscher ◽  
Rudolf Holze ◽  
Qunting Qu
Keyword(s):  
Electrode Materials ◽  
Experimental Methods ◽  
Double Layers ◽  
Charge Storage ◽  
Redox Processes ◽  
Solution Interface ◽  
Interfacial Capacitance ◽  
Electrochemical Double Layer ◽  
Practical Recommendations

Abstract Relevant fundamentals of the electrochemical double layer and supercapacitors utilizing the interfacial capacitance as well as superficial redox processes at the electrode/solution interface are briefly reviewed. Experimental methods for the determination of the capacity of electrochemical double layers, of charge storage electrode materials for supercapacitors, and of supercapacitors are discussed and compared. Intrinsic limitations and pitfalls are indicated; popular errors, misconceptions, and mistakes are evaluated. The suitability of available methods is discussed, and practical recommendations are provided.

Electrochemical Evaluation of the Interfacial Capacitance upon Phosphorylation of Amino Acid Analogue Molecular Films

2001 ◽  
Vol 73 (18) ◽  
pp. 4463-4468 ◽  
Author(s):  
Johan Ekeroth ◽  
Fredrik Björefors ◽  
Annika Borgh ◽  
Ingemar Lundström ◽  
Bo Liedberg ◽  
...  
Keyword(s):  
Amino Acid ◽  
Molecular Films ◽  
Amino Acid Analogue ◽  
Acid Analogue ◽  
Interfacial Capacitance ◽  
Electrochemical Evaluation
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