3R Economy of a PKL Electrochemical Cell

Objective:This paper analyses the Modular Multilevel Converter (MMC) topology, where each individual Sub Module (SM), in half bridge configuration, is directly fed by an elementary electrochemical cell.Methods:The aim is to investigate how the reference voltages influence the cells currents waveforms, determining how the active powers and the losses are distributed among the cells. Considering a 2-level Voltage Source Inverter (VSI) topology working in the same conditions, the ratio between the MMC total cells losses and VSI total cells losses is calculated. After showing the system architecture and mathematical model, the cells current waveform investigation is presented and detailed both for triangular and sinusoidal voltage reference waveform.Results:Finally, the results are critically discussed with particular focus on the comparison between the MMC and the VSI topologies.

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Photo-Current Enhancement at Cu/p-Cu2O/rGO- Electrolyte Interface

Journal of Scientific and Technical Research ◽

10.21863/jstr/2016.6.1.006 ◽

2016 ◽

Vol 6 (1) ◽

Author(s):

S.P.A.U.K. Samarakoon ◽

C.A.N. Fernando

Keyword(s):

Diffuse Reflectance ◽

Electrochemical Cell ◽

Time Development ◽

Charge Carriers ◽

Electrochemical Cells ◽

Current Action ◽

Electrolyte Interface ◽

Reduced Graphene ◽

Efficient Charge ◽

Photo Current

A considerable photo-current enhancement was found at the Cu/p-Cu2O/rGO-electrolyte interface in a photo-electrochemical cell with compared to that of Cu/p-Cu2O-electrolyte interface. The reason for the photo-current enhancement may be due to the efficient charge separation process provided at Cu/p-Cu2O/rGO-electrolyte interface. Here rGO (reduced graphene oxide) acts as an electron acceptor for the photo-generated charge carriers as it readily accept electrons from the conduction band of p-Cu2O. rGO was synthesized using electro-phoretic deposition (EPD) technique. Fabricated samples were characterized using diffuse reflectance spectra, photo-current action spectra and the time development of the photocurrent of photo-electrochemical cells.

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Structure–Property Relationship in Amber Color Light-Emitting Electrochemical Cell with TFSI Counteranion: Enhancing Device Performance by Different Substituents on N∧N Ligand

Inorganic Chemistry ◽

10.1021/acs.inorgchem.0c02939 ◽

2021 ◽

Vol 60 (7) ◽

pp. 4410-4423

Author(s):

Nuriye Demir ◽

Merve Karaman ◽

Gul Yakali ◽

Tugba Tugsuz ◽

Serpil Denizalti ◽

...

Keyword(s):

Electrochemical Cell ◽

Device Performance ◽

Structure Property ◽

Light Emitting ◽

Property Relationship ◽

Structure Property Relationship

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Understanding contact electrification at liquid–solid interfaces from surface electronic structure

Nature Communications ◽

10.1038/s41467-021-22005-6 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Mingzi Sun ◽

Qiuyang Lu ◽

Zhong Lin Wang ◽

Bolong Huang

Keyword(s):

Charge Transfer ◽

Electronic Structures ◽

Electrochemical Cell ◽

Cell Model ◽

Electrostatic Charge ◽

Direct Visualization ◽

Solid Interface ◽

Surface Electronic Structure ◽

Contact Electrification ◽

Triboelectric Nanogenerators

AbstractThe charge transfer phenomenon of contact electrification even exists in the liquid–solid interface by a tiny droplet on the solid surface. In this work, we have investigated the contact electrification mechanism at the liquid–solid interface from the electronic structures at the atomic level. The electronic structures display stronger modulations by the outmost shell charge transfer via surface electrostatic charge perturbation than the inter-bonding-orbital charge transfer at the liquid–solid interface, supporting more factors being involved in charge transfer via contact electrification. Meanwhile, we introduce the electrochemical cell model to quantify the charge transfer based on the pinning factor to linearly correlate the charge transfer and the electronic structures. The pinning factor exhibits a more direct visualization of the charge transfer at the liquid–solid interface. This work supplies critical guidance for describing, quantifying, and modulating the contact electrification induced charge transfer systems in triboelectric nanogenerators in future works.

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