Solvent-free, lithium-ion-conducting, composite polymer electrolytes have been prepared by a double dispersion of an anion trapping compound, i.e., calyx(6) pyrrole, CP and a ceramic filler, i.e., super acid zirconia, S-ZrO2 in a poly(ethylene oxide)-lithium bis(oxalate) borate, PEO-LiBOB matrix. The characterization, based on differential thermal analysis and electrochemical analysis, showed that while the addition of the S-ZrO2 has scarce influence on the transport properties of the composite electrolyte, the unique combination of the anion-trapping compound, CP, with the large anion lithium salt, LiBOB, greatly enhances the value of the lithium transference number without depressing the overall ionic conductivity. These unique properties make polymer electrolytes, such as PEO20LiBOB(CP)(0.125), of practical interest, as in fact confirmed by tests carried out on lithium battery prototypes.
High performance PEO-based polymer electrolytes and their application in rechargeable lithium polymer batteries
HASSOUN, Jusef;
2007
Abstract
Solvent-free, lithium-ion-conducting, composite polymer electrolytes have been prepared by a double dispersion of an anion trapping compound, i.e., calyx(6) pyrrole, CP and a ceramic filler, i.e., super acid zirconia, S-ZrO2 in a poly(ethylene oxide)-lithium bis(oxalate) borate, PEO-LiBOB matrix. The characterization, based on differential thermal analysis and electrochemical analysis, showed that while the addition of the S-ZrO2 has scarce influence on the transport properties of the composite electrolyte, the unique combination of the anion-trapping compound, CP, with the large anion lithium salt, LiBOB, greatly enhances the value of the lithium transference number without depressing the overall ionic conductivity. These unique properties make polymer electrolytes, such as PEO20LiBOB(CP)(0.125), of practical interest, as in fact confirmed by tests carried out on lithium battery prototypes.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
