Elucidating the evolution of silicon anodes in lithium based batteries

MRS Advances ◽  
2020 ◽  
pp. 1-10
Author(s):  
Wenzao Li ◽  
Mallory N. Vila ◽  
Esther S. Takeuchi ◽  
Kenneth J. Takeuchi ◽  
Amy C. Marschilok
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Major Part ◽  
Electrochemical Impedance ◽  
High Capacity ◽  
Entropy Change ◽  
Electrochemical Polarization ◽  
X Ray ◽  
Silicon Anodes

Abstract Silicon has attracted particular attention as a potential high capacity material for lithium based batteries. However, the application of Si-based electrodes remains challenging, in major part due to its significant irreversible energy loss during cycling. Here isothermal microcalorimetry (IMC) is demonstrated to be a precise and operando characterization method for tracking a battery's thermal behaviour and deconvoluting the contributions from electrochemical polarization, entropy change, and parasitic reactions. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and x-ray powder diffraction (XRD) further elucidate the Si reactivity in conjunction with the IMC.

scholarly journals Phenol Removal from Wastewaters by Electrochemical Biosensor

2019 ◽  
pp. 24-32
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Biosensor ◽  
Electrochemical Impedance ◽  
Experimental Results ◽  
Phenol Oxidation ◽  
Phenol Removal ◽  
Natural Phosphate ◽  
The Matrix

The aim of this work is to introduce bacteria into the matrix of natural phosphate to catalyze the phenol oxidation in the wastewater.This electrode, designated subsequently by bacteria-NP-CPE, Showed stable response and was characterized with voltammeter methods, as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and DRX. The experimental results revealed that the prepared electrode could be a feasible for degradation of hazardous phenol pollutants in the wastewater.

scholarly journals Chiral Discrimination of Tryptophan Enantiomers via (1R, 2R)-2-Amino-1, 2-Diphenyl Ethanol Modified Interface

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Juan Zhou ◽  
Qiao Chen ◽  
Li-lan Wang ◽  
Yong-hua Wang ◽  
Ying-zi Fu
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Chiral Discrimination ◽  
Characteristic Analysis ◽  
Tryptophan Enantiomers ◽  
Sensitive Property ◽  
The Stability ◽  
Relative Change

The paper reported that a simple chiral selective interface constructed by (1R, 2R)-2-amino-1, 2-diphenyl ethanol had been developed to discriminate tryptophan enantiomers. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used for the characteristic analysis of the electrode. The results indicated that the interface showed stable and sensitive property to determine the tryptophan enantiomers. Moreover, it exhibited the better stereoselectivity for L-tryptophan than that for D-tryptophan. The discrimination characteristics of the chiral selective interface for discriminating tryptophan enantiomers, including the response time, the effect of tryptophan enantiomers concentration, and the stability, were investigated in detail. In addition, the chiral selective interface was used to determine the enantiomeric composition of L- and D-tryptophan enantiomer mixtures by measuring the relative change of the peak current as well as in pure enantiomeric solutions. These results suggested that the chiral selective interface has the potential for enantiomeric discrimination of tryptophan enantiomers.

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