TY - JOUR
T1 - In situ observation of lithium deposition processes in solid polymer and gel electrolytes
AU - Osaka, Tetsuya
AU - Homma, Takayuki
AU - Momma, Toshiyuki
AU - Yarimizu, Hideki
N1 - Funding Information:
This work was supported financially in part by the Grant-in-Aid for Science Research on Priority Area "Dynamics of Fast Ions in Solids and its Evolution for Solid State Ionics" (No. 08229245) from the Ministry of Education, Science, Sports and Culture, the Science Research Promotion Fund of the Japan Private School Promotion Foundation, the Yazaki Memorial Foundation for Science and Technology, and a Waseda University Grant for Special Research Projects.
PY - 1997/1/30
Y1 - 1997/1/30
N2 - Deposition processes of lithium in solid polymer [poly(ethylene oxide) (PEO)8 + LiClO4] and gel [PEO8 + propylene carbonate(PC) + LiClO4] electrolytes, as well as in the liquid (PC + LiClO4) one, were observed in situ using an optical microscope and their difference is discussed. It was confirmed that the dendritic growth of lithium, which appeared in the liquid electrolyte, is suppressed in the solid polymer due to the immobility of the electrolyte molecules, although non-uniform coverage of the cathode was observed because of its low conductivity. In contrast, the gel electrolyte possessed advantages of both the liquid and solid electrolytes, resulting in a smooth and uniform deposition in the current density region up to 2.0mAcm-2.
AB - Deposition processes of lithium in solid polymer [poly(ethylene oxide) (PEO)8 + LiClO4] and gel [PEO8 + propylene carbonate(PC) + LiClO4] electrolytes, as well as in the liquid (PC + LiClO4) one, were observed in situ using an optical microscope and their difference is discussed. It was confirmed that the dendritic growth of lithium, which appeared in the liquid electrolyte, is suppressed in the solid polymer due to the immobility of the electrolyte molecules, although non-uniform coverage of the cathode was observed because of its low conductivity. In contrast, the gel electrolyte possessed advantages of both the liquid and solid electrolytes, resulting in a smooth and uniform deposition in the current density region up to 2.0mAcm-2.
KW - Dendritic growth
KW - In situ observation
KW - Lithium secondary battery
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U2 - 10.1016/S0022-0728(96)04870-X
DO - 10.1016/S0022-0728(96)04870-X
M3 - Article
AN - SCOPUS:0030676302
SN - 0022-0728
VL - 421
SP - 153
EP - 156
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 1-2
ER -