Effect of Charge Transfer Resistance on Morphology of Lithium Electrodeposited in Ionic Liquid

2016 ◽  
Vol 163 (12) ◽  
pp. D3076-D3079 ◽  
Author(s):  
Hikaru Sano ◽  
Mitsunori Kitta ◽  
Hajime Matsumoto
Keyword(s):  
Ionic Liquid ◽  
Charge Transfer ◽  
Charge Transfer Resistance ◽  
Transfer Resistance

scholarly journals Effect of nanostructured carbon coatings on the electrochemical performance of Li1.4Ni0.5Mn0.5O2+ x -based cathode materials

2016 ◽  
Vol 7 ◽  
pp. 1960-1970 ◽  
Author(s):  
Konstantin A Kurilenko ◽  
Oleg A Shlyakhtin ◽  
Oleg A Brylev ◽  
Dmitry I Petukhov ◽  
Alexey V Garshev
Keyword(s):  
Diffusion Coefficient ◽  
Charge Transfer ◽  
Specific Capacity ◽  
Charge Transfer Resistance ◽  
Poly Vinyl Alcohol ◽  
Nanostructured Carbon ◽  
Transfer Resistance ◽  
Carbon Coatings ◽  
Lithium Diffusion Coefficient ◽  
Electrochemical Cycling

Nanocomposites of Li1.4Ni0.5Mn0.5O2+ x and amorphous carbon were obtained by the pyrolysis of linear and cross-linked poly(vinyl alcohol) (PVA) in presence of Li1.4Ni0.5Mn0.5O2+ x . In the case of linear PVA, the formation of nanostructured carbon coatings on Li1.4Ni0.5Mn0.5O2+ x particles is observed, while for cross-linked PVA islands of mesoporous carbon are located on the boundaries of Li1.4Ni0.5Mn0.5O2+ x particles. The presence of the carbon framework leads to a decrease of the polarization upon cycling and of the charge transfer resistance and to an increase in the apparent Li+ diffusion coefficient from 10−16 cm2·s−1 (pure Li1.4Ni0.5Mn0.5O2+ x ) to 10−13 cm2·s−1. The nanosized carbon coatings also reduce the deep electrochemical degradation of Li1.4Ni0.5Mn0.5O2+ x during electrochemical cycling. The nanocomposite obtained by the pyrolysis of linear PVA demonstrates higher values of the apparent lithium diffusion coefficient, a higher specific capacity and lower values of charge transfer resistance, which can be related to the more uniform carbon coatings and to the significant content of sp2-hybridized carbon detected by XPS and by Raman spectroscopy.

Estimation of continuity of electroactive inorganic films based on apparent anti-Ohmic trend in their charge transfer resistance

2016 ◽  
Vol 219 ◽  
pp. 588-591 ◽  
Author(s):  
Maria A. Komkova ◽  
Elena V. Karpova ◽  
Grigory A. Sukhorukov ◽  
Alexey A. Sadovnikov ◽  
Arkady A. Karyakin
Keyword(s):  
Charge Transfer ◽  
Charge Transfer Resistance ◽  
Transfer Resistance ◽  
Inorganic Films
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