Fundamental studies of copper anode passivation during electrorefining: Part I. development of techniques

1996 ◽  
Vol 27 (3) ◽  
pp. 393-398 ◽  
Author(s):  
Xuan Cheng ◽  
J. Brent Hiskey
Keyword(s):  
Copper Anode ◽  
Anode Passivation

Study of the copper anode passivation by electrochemical noise analysis using spectral and wavelet transforms

2010 ◽  
Vol 55 (7) ◽  
pp. 2505-2512 ◽  
Author(s):  
Anne-Marie Lafront ◽  
Fariba Safizadeh ◽  
Edward Ghali ◽  
Georges Houlachi
Keyword(s):  
Wavelet Transforms ◽  
Electrochemical Noise ◽  
Noise Analysis ◽  
Copper Anode ◽  
Anode Passivation

Influence of VC and FEC Additives on Interphase Properties of Carbon in Li-Ion Cells Investigated by Combined EIS & EQCM-D

2020 ◽  
Author(s):  
Paul Kitz ◽  
Matthew Lacey ◽  
Petr Novák ◽  
Erik Berg
Keyword(s):  
Electrochemical Impedance ◽  
Solid Electrolyte Interphase ◽  
Electrochemical Quartz Crystal Microbalance ◽  
Gas Analysis ◽  
Side Reactions ◽  
Ion Diffusion ◽  
Battery Cell ◽  
Anode Passivation ◽  
Order Of Magnitude ◽  
Li Ion

<div>The electrolyte additives vinylene carbonate (VC) and fluoroethylene carbonate (FEC) are well known for increasing the lifetime of a Li-ion battery cell by supporting the formation of an effective solid electrolyte interphase (SEI) at the anode. In this study combined simultaneous electrochemical impedance spectroscopy (EIS) and <i>operando</i> electrochemical quartz crystal microbalance with dissipation monitoring (EQCM-D) are employed together with <i>in situ</i> gas analysis (OEMS) to study the influence of VC and FEC on the passivation process and the interphase properties at carbon-based anodes. In small quantities both additives reduce the initial interphase mass loading by 30 to 50 %, but only VC also effectively prevents continuous side reactions and improves anode passivation significantly. VC and FEC are both reduced at potentials above 1 V vs. Li<sup>+</sup>/Li in the first cycle and change the SEI composition which causes an increase of the SEI shear storage modulus by over one order of magnitude in both cases. As a consequence, the ion diffusion coefficient and conductivity in the interphase is also significantly affected. While small quantities of VC in the initial electrolyte increase the SEI conductivity, FEC decomposition products hinder charge transport through the SEI and thus increase overall anode impedance significantly. </div>

scholarly journals Passivation Behaviour of Anode in Copper Electrorefining Using Recycled Low-grade Copper Anode

2017 ◽  
Vol 133 (7) ◽  
pp. 165-172 ◽  
Author(s):  
Koudai TOKUSHIGE ◽  
Kohei MORI ◽  
Satoshi OUE ◽  
Hiroshi MATSUSHIMA ◽  
Kazunari SUZUKI ◽  
...  
Keyword(s):  
Low Grade ◽  
Copper Anode ◽  
Copper Electrorefining
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