LiBF4-Based Concentrated Electrolyte Solutions for Suppression of Electrolyte Decomposition and Rapid Lithium-Ion Transfer at LiNi0.5Mn1.5O4/Electrolyte Interface

2016 ◽  
Vol 163 (10) ◽  
pp. A2211-A2215 ◽  
Author(s):  
Takayuki Doi ◽  
Yusuke Shimizu ◽  
Michihiro Hashinokuchi ◽  
Minoru Inaba
Keyword(s):  
Lithium Ion ◽  
Electrolyte Solutions ◽  
Ion Transfer ◽  
Concentrated Electrolyte Solutions ◽  
Electrolyte Interface

scholarly journals Kinetic properties of sodium-ion transfer at the interface between graphitic materials and organic electrolyte solutions

2021 ◽  
Author(s):  
Yasuyuki Kondo ◽  
Tomokazu Fukutsuka ◽  
Yuko Yokoyama ◽  
Yuto Miyahara ◽  
Kohei Miyazaki ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Transfer Reaction ◽  
Lithium Ion ◽  
Electrolyte Solutions ◽  
Activation Energies ◽  
Frequency Region ◽  
Sodium Ion ◽  
Organic Electrolyte ◽  
Charge Transfer Reaction ◽  
Ion Transfer

AbstractGraphitic materials cannot be applied for the negative electrode of sodium-ion battery because the reversible capacities of graphite are anomalously small. To promote electrochemical sodium-ion intercalation into graphitic materials, the interfacial sodium-ion transfer reaction at the interface between graphitized carbon nanosphere (GCNS) electrode and organic electrolyte solutions was investigated. The interfacial lithium-ion transfer reaction was also evaluated for the comparison to the sodium-ion transfer. From the cyclic voltammograms, both lithium-ion and sodium-ion can reversibly intercalate into/from GCNS in all of the electrolytes used here. In the Nyquist plots, the semi-circles at the high frequency region derived from the Solid Electrolyte Interphase (SEI) resistance and the semi-circles at the middle frequency region owing to the charge-transfer resistance appeared. The activation energies of both lithium-ion and sodium-ion transfer resistances were measured. The values of activation energies of the interfacial lithium-ion transfer suggested that the interfacial lithium-ion transfer was influenced by the interaction between lithium-ion and solvents, anions or SEI. The activation energies of the interfacial sodium-ion transfer were larger than the expected values of interfacial sodium-ion transfer based on the week Lewis acidity of sodium-ion. In addition, the activation energies of interfacial sodium-ion transfer in dilute FEC-based electrolytes were smaller than those in concentrated electrolytes. The activation energies of the interfacial lithium/sodium-ion transfer of CNS-1100 in FEC-based electrolyte solutions were almost the same as those of CNS-2900, indicating that the mechanism of interfacial charge-transfer reaction seemed to be the same for highly graphitized materials and low-graphitized materials each other. Graphic abstract

scholarly journals Improving Electrochemical Performance at Graphite Negative Electrodes in Concentrated Electrolyte Solutions by Addition of 1,2-Dichloroethane

2019 ◽  
Vol 9 (21) ◽  
pp. 4647
Author(s):  
Hee-Youb Song ◽  
Moon-Hyung Jung ◽  
Soon-Ki Jeong
Keyword(s):  
Electrochemical Performance ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Electrolyte Solutions ◽  
High Viscosity ◽  
Lithium Intercalation ◽  
Lithium Ions ◽  
Concentrated Electrolyte Solutions ◽  
Negative Electrodes

In concentrated propylene carbonate (PC)-based electrolyte solutions, reversible lithium intercalation and de-intercalation occur at graphite negative electrodes because of the low solvation number. However, concentrated electrolyte solutions have low ionic conductivity due to their high viscosity, which leads to poor electrochemical performance in lithium-ion batteries. Therefore, we investigated the effect of the addition of 1,2-dichloroethane (DCE), a co-solvent with low electron-donating ability, on the electrochemical properties of graphite in a concentrated PC-based electrolyte solution. An effective solid electrolyte interphase (SEI) was formed, and lithium intercalation into graphite occurred in the concentrated PC-based electrolyte solutions containing various amounts of DCE, while the reversible capacity improved. Raman spectroscopy results confirmed that the solvation structure of the lithium ions, which allows for effective SEI formation, was maintained despite the decrease in the total molality of LiPF6 by the addition of DCE. These results suggest that the addition of a co-solvent with low electron-donating ability is an effective strategy for improving the electrochemical performance in concentrated electrolyte solutions.

Lithium Ion Transfer At Carbon Thin Film Electrode/Electrolyte Interface

2002 ◽  
Vol 388 (1) ◽  
pp. 141-146 ◽  
Author(s):  
Takeshi Abe ◽  
Shigeki Yamate ◽  
Yasutoshi Iriyama ◽  
Minoru Inaba ◽  
Zempachi Ogumi ◽  
...  
Keyword(s):  
Thin Film ◽  
Lithium Ion ◽  
Ion Transfer ◽  
Film Electrode ◽  
Thin Film Electrode ◽  
Electrolyte Interface ◽  
Carbon Thin Film

Lithium‐Ion Transfer at Cathode‐Electrolyte Interface in Diluted Electrolytes Using Electrochemical Impedance Spectroscopy

2020 ◽  
Vol 7 (7) ◽  
pp. 1644-1651 ◽  
Author(s):  
Toshiyuki Ohashi ◽  
Ken‐ichi Okazaki ◽  
Toshiharu Fukunaga ◽  
Zempachi Ogumi ◽  
Takeshi Abe
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Lithium Ion ◽  
Ion Transfer ◽  
Electrolyte Interface

Lithium-Ion Transfer Reaction at the Interface between Partially Fluorinated Insertion Electrodes and Electrolyte Solutions

2011 ◽  
Vol 115 (26) ◽  
pp. 12990-12994 ◽  
Author(s):  
Toyoki Okumura ◽  
Tomokazu Fukutsuka ◽  
Keisuke Matsumoto ◽  
Yuki Orikasa ◽  
Hajime Arai ◽  
...  
Keyword(s):  
Transfer Reaction ◽  
Lithium Ion ◽  
Electrolyte Solutions ◽  
Ion Transfer ◽  
Insertion Electrodes
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