期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 169, 期 11, 页码 -出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/ac9f75
关键词
transference numbers; polyethylene oxide; sodium batteries; solid electrolytes; composite polymer electrolytes
The transference number for cations is crucial for characterizing polymeric and/or composite solid electrolytes. A comparison was made between four electrochemical methods, and the oldest method was found to be the simplest, most reliable, sensitive, repeatable, and stable option for determining transference numbers over time.
The transference number for cations, t ( + ), is one of the most important parameters for characterizing polymeric and/or composite solid electrolytes. It expresses the contribution of the positive charge carriers to the total conductivity, which in turn reflects the degree of polarization due to the negative carriers in the electrolyte systems. Four electrochemical methods based on different equations commonly used for obtaining t ( + ) are compared. A series of experiments were conducted with solid polymer electrolytes based on polyethylene oxide with and without TiO2 ceramic additive. Interestingly, the oldest method developed and presented four decades ago, emerges as the most simple, reliable, sensitive, repeatable, and stable option for determining t ( + ) values over time.
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