TY - JOUR
T1 - Highly conductive, oriented polymer electrolytes for lithium batteries
AU - Golodnitsky, D.
AU - Livshits, E.
AU - Ulus, A.
AU - Peled, E.
PY - 2002
Y1 - 2002
N2 - In semicrystalline complexes of poly(ethylene oxide) (PEO) with different salts, such as lithium iodide, lithium trifluoromethanesulfonate (LiTF) and lithium trifluoromethanesulfonimide (LiTFSI), stretching induced longitudinal DC conductivity enhancement was observed, in spite of the formation of more ordered polymer electrolyte (PE) structure. It was found that the more amorphous the PE, the less its lengthwise conductivity is influenced by stretching. The results of our investigation suggest that ionic transport occurs preferentially along the PEO helical axis, at least in the crystalline phase, and that the rate-determining step of the lithium ion conduction in LiI:P(EO)20, LiTF: P(EO)20 polymer electrolytes below Tm is "interchain" hopping. Understanding ion transport processes is clearly a fertile field for research and development in the synthesis of new rigid polymers with ordered channels and composition appropriate for enhanced ionic conductivity.
AB - In semicrystalline complexes of poly(ethylene oxide) (PEO) with different salts, such as lithium iodide, lithium trifluoromethanesulfonate (LiTF) and lithium trifluoromethanesulfonimide (LiTFSI), stretching induced longitudinal DC conductivity enhancement was observed, in spite of the formation of more ordered polymer electrolyte (PE) structure. It was found that the more amorphous the PE, the less its lengthwise conductivity is influenced by stretching. The results of our investigation suggest that ionic transport occurs preferentially along the PEO helical axis, at least in the crystalline phase, and that the rate-determining step of the lithium ion conduction in LiI:P(EO)20, LiTF: P(EO)20 polymer electrolytes below Tm is "interchain" hopping. Understanding ion transport processes is clearly a fertile field for research and development in the synthesis of new rigid polymers with ordered channels and composition appropriate for enhanced ionic conductivity.
KW - Ion transport mechanism
KW - Polymer electrolyte
UR - http://www.scopus.com/inward/record.url?scp=0036826129&partnerID=8YFLogxK
U2 - 10.1002/pat.266
DO - 10.1002/pat.266
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AN - SCOPUS:0036826129
SN - 1042-7147
VL - 13
SP - 683
EP - 689
JO - Polymers for Advanced Technologies
JF - Polymers for Advanced Technologies
IS - 10-12
ER -