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US 4,728,589 AGranted
Reversible electrochemical doping of conjugated polymers and secondary batteries based thereon
AssigneeUniversity Patents, Inc.
InventorsAlan G. MacDiarmid, Alan J. Heeger, Paul J. Nigrey
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Abstract
A secondary battery comprises at least one electrode having as an active materials a conjugated polymer, the polymer being doped to an electrically conducting state. Particularly, the battery may comprise the polymer as a cathode and a lithium anode.
Claims4
A secondary battery comprising an anode means, a cathode means, and an electrolyte at least one of said electrode means including as an electrode active material a conjugated polymer which is characterized as having conjugated unsaturation along a main backbone chain thereof;
- said polymer being either oxidized or reduced to an electrically conducting state wherein it is doped with at least one ionic dopant species;
- said electrolyte comprising said ionic dopant species or a compound ionizable to form said ionic dopant species;
- and electrolyte being non-aqueous and inert with respect to the electrodes;
- wherein the conjugated polymer is doped with an anionic dopant species to a p-type electrically conducting state;
- wherein the anionic dopant species is selected from the group consisting of halide ions, ClO.sub.4.sup.-, PF.sub.6.sup.-, AsF.sub.6.sup.-, AsF.sub.4.sup.-, SO.sub.3 CF.sub.3.sup.- and BF.sub.4.sup.-.
2 more elements
Dependencies are inferred from the claim text.