Attempts at lithium single-ionic conduction by anchoring sulfonate anions as terminating groups of oligo(oxyethylene) side chains in comb-type polyphosphazenes

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Chemistry of Materials; (United States)

DOI:https://doi.org/10.1021/cm00037a008· OSTI ID:7081419

Tada, Yuji; Sato, Moriyuki; Takeno, Noboru ^[1]; Nakacho, Yoshifumi ^[2]; Shigehara, Kiyotaka ^[3]

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1. Muroran Institute of Technology, Muroran (Japan)
2. Otsuka Chemical Co., Ltd., Tokushima (Japan)
3. Tokyo Univ. of Agriculture and Technology, Tokyo (Japan)

Novel comb-type polyphosphazenes with anchored lithium sulfopropyl oligo(oxyethylene) side chains [SEP] were synthesized by a one-step reaction with lithium bisulfite and polyphosphazenes containing oligo(oxyethylene) side chains terminated with allyl groups [AEP]. The dc ionic conductivity ([sigma]) of SEP was measured using lithium electrodes and compared with hybrid (polymer-salt complexes) between LiSO[sub 3]CF[sub 3] and the corresponding non-sulfonate comb-type polymer [MEP], i.e., poly(bis[[omega]-methoxyoligo(oxyethylene)]phosphazene). While the time dependence of [sigma]/[sigma][sub o] ([sigma][sub o]: initial conductivity) of SEP showed a constant value, that of the hybrid system drastically decreased with time due to the self-polarization by mobile anions. The stationary values of [sigma] after prolonged electrolysis were 7.1 x 10[sup [minus]8] S cm[sup [minus]1] for SEP and 8.5 x 10[sup [minus]7] S cm[sup [minus]1] for the hybrid at 1.0-V dc supply. 16 refs., 2 figs., 2 tabs.

• OSTI ID: 7081419
• Journal Information: Chemistry of Materials; (United States), Journal Name: Chemistry of Materials; (United States) Vol. 6:1; ISSN CMATEX; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ALKALI METAL COMPOUNDS
ANIONS
CHARGED PARTICLES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
IONIC CONDUCTIVITY
IONS
LITHIUM COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLARIZATION
POLYMERS