TY - JOUR
T1 - Measurement of the electrochemical oxidation of organic electrolytes used in lithium batteries by microelectrode
AU - Egashira, Minato
AU - Takahashi, Hideki
AU - Okada, Shigeto
AU - Yamaki, Jun Ichi
N1 - Funding Information:
This work is supported by NTT Telecommunications Energy Laboratories (Nippon Telegraph and Telephone Corporation), Mitsubishi Chemical Corporation, and Industrial Science Research Promotion Foundation. The authors thank Mitsubishi Chemical Corporation for providing the electrolytes used in this work.
PY - 2001/1
Y1 - 2001/1
N2 - The electrochemical oxidation of organic electrolytes was investigated using microelectrodes. The electrolytes we used were LiClO4/(EC+DEC) and LiPF6(EC+DEC) which are widely employed in lithium ion batteries. We measured the oxidation current by the potential step method (the potential is maintained until the current becomes constant) at potentials ranging from 4.5 to 5.5 V versus Li/Li+. The current density-potential relationship of the oxidation of 1 M LiClO4/(EC+DEC) electrolyte on the carbon microelectrode shows good reproducibility and roughly fits exponential lines. We obtained a similar relationship regardless of the material and size of the microelectrodes. Therefore, the electrochemical oxidation of organic electrolytes can be compared using this method. The different oxidation behavior of LiPF6 salt and LiClO4 salt electrolyte suggests that the salt anions may initiate the electrolyte oxidation.
AB - The electrochemical oxidation of organic electrolytes was investigated using microelectrodes. The electrolytes we used were LiClO4/(EC+DEC) and LiPF6(EC+DEC) which are widely employed in lithium ion batteries. We measured the oxidation current by the potential step method (the potential is maintained until the current becomes constant) at potentials ranging from 4.5 to 5.5 V versus Li/Li+. The current density-potential relationship of the oxidation of 1 M LiClO4/(EC+DEC) electrolyte on the carbon microelectrode shows good reproducibility and roughly fits exponential lines. We obtained a similar relationship regardless of the material and size of the microelectrodes. Therefore, the electrochemical oxidation of organic electrolytes can be compared using this method. The different oxidation behavior of LiPF6 salt and LiClO4 salt electrolyte suggests that the salt anions may initiate the electrolyte oxidation.
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U2 - 10.1016/S0378-7753(00)00553-X
DO - 10.1016/S0378-7753(00)00553-X
M3 - Article
AN - SCOPUS:0035196480
VL - 92
SP - 267
EP - 271
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
IS - 1-2
ER -
