Criteria for Standardization of pH Measurements in Organic Solvents and Water + Organic Solvent Mixtures of Moderate to High Permittivities

2016 ◽  
Author(s):  
T. Mussini ◽  
A. K. Covington ◽  
P. Longhi ◽  
S. Rondinini
Keyword(s):  
Organic Solvent ◽  
Organic Solvents ◽  
Solvent Mixtures ◽  
Ph Measurements

scholarly journals Sodium Rechargeable Batteries with Electrolytes Based on Nafion Membranes Intercalated by Mixtures of Organic Solvents

Batteries ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 61 ◽  
Author(s):  
Tatiana Kulova ◽  
Alexander Skundin ◽  
Andrey Chekannikov ◽  
Svetlana Novikova ◽  
Daria Voropaeva ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Organic Solvents ◽  
Propylene Carbonate ◽  
Room Temperature ◽  
Ethylene Carbonate ◽  
Rechargeable Batteries ◽  
Electrochemical Stability ◽  
Solvent Mixtures ◽  
Capacity Fading ◽  
Nafion Membranes

The possibilities of manufacturing batteries with Nafion 117 membranes in the Na+-form intercalated by mixtures of non-aqueous organic solvents used both as an electrolyte, separator, and binder were investigated. Electrochemical stability of various organic solvent mixtures based on N,N-dimethylacetamide, ethylene carbonate, propylene carbonate, and tetrahydrofuran were characterized. It was shown that a sodium battery based on a Nafion-Na membrane intercalated by mixture of ethylene carbonate and propylene carbonate with a Na3V1.9Fe0.1(PO4)3/C positive electrode is characterized by a discharge capacity of ≈110 mAh·g−1 (current density of 10 mA·g−1) at room temperature and shows the ability to cycle without degradation during 20 cycles. Batteries with Nafion membrane electrolytes, containing N,N-dimethylacetamide, were characterized using capacity fading during cycling, which is due to the interaction of N,N-dimethylacetamide and a negative sodium electrode.

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