TY - JOUR
T1 - Ionic conductivity in the solid glyme complexes [CH3O(CH2CH2O)(n)CH3]: LiAsF6 (n=3,4)
AU - Zhang, Chuhong
AU - Ainsworth, David
AU - Andreev, Yuri G.
AU - Bruce, Peter G.
PY - 2007/7/18
Y1 - 2007/7/18
N2 - We have shown that two small molecule solid electrolytes, [CH3O(CH2CH2O)(3)CH3]:LiAsF6 and [CH3O(CH2CH2O)(4)CH3]:LiAsF6, differing by only one ethylene oxide unit exhibit markedly different transport numbers, t(+)= 0.8 and 0.1, respectively. Such differences are related, on the one hand, to the presence of tunnels for Li+ migration in the crystal structure of the G3 complex, but not G4, and, on the other hand, to the weaker binding of AsF6- in the structure of G4 than in G3. Learning how to construct solid electrolytes that exhibit high Li+ transport numbers is important in minimizing polarization when such electrolytes are used in all-solid-state cells, such as lithium batteries.
AB - We have shown that two small molecule solid electrolytes, [CH3O(CH2CH2O)(3)CH3]:LiAsF6 and [CH3O(CH2CH2O)(4)CH3]:LiAsF6, differing by only one ethylene oxide unit exhibit markedly different transport numbers, t(+)= 0.8 and 0.1, respectively. Such differences are related, on the one hand, to the presence of tunnels for Li+ migration in the crystal structure of the G3 complex, but not G4, and, on the other hand, to the weaker binding of AsF6- in the structure of G4 than in G3. Learning how to construct solid electrolytes that exhibit high Li+ transport numbers is important in minimizing polarization when such electrolytes are used in all-solid-state cells, such as lithium batteries.
KW - CRYSTALLINE POLYMER ELECTROLYTES
KW - AMORPHOUS CONCENTRATED LIQUID
KW - CATION SOLVATE STRUCTURES
KW - MODELS
UR - http://www.scopus.com/inward/record.url?scp=34848835134&partnerID=8YFLogxK
U2 - 10.1021/ja073145f
DO - 10.1021/ja073145f
M3 - Article
SN - 0002-7863
VL - 129
SP - 8700
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
ER -