Open AccessNMR STUDIES ON SELF DIFFUSION COEFFICIENTS OF LITHIUM IONS IN PAN-BASED GEL POLYMER ELECTROLYTES
Author(s) -
Zirong Li,
Meng Qi,
Guan Di-Hua,
Gang Wang
Publication year - 1999
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.48.1175
Subject(s) - lithium (medication) , self diffusion , ion , diffusion , electrolyte , materials science , polymer , pulsed field gradient , salt (chemistry) , isotopes of lithium , ionic bonding , analytical chemistry (journal) , chemistry , thermodynamics , ion exchange , organic chemistry , physics , medicine , self service , electrode , marketing , business , endocrinology , composite material
The self diffusion coefficients D of lithium ions in PAN-EC/PC-LiClO4 gel polymer electrolytes with different compositions and at different temperatures have been directly measured by field gradient NMR spin echo technique. The results indicated that self diffusion coefficients D of lithium ions were dependent on the mass ratio x% of lithium salt, and had a maxiumum at x=10 in the range of x=5 to 20. It was suggested that this was probably involved with transport mechanisms of the hopping of lithium ions, and with two kinds of interactions: the interaction between Li+ ions and plasticizer EC, and the interaction between Li+ ions and network polymer PAN.