Electrolyte materials containing highly dissociated metal ion salts
AssigneeMoltech Corporation
InventorsHung-Sui Lee, Lin Geng, Terje A. Skotheim
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Abstract
The present invention relates to metal ion salts which can be used in electrolytes for producing electrochemical devices, including both primary and secondary batteries, photoelectrochemical cells and electrochromic displays. The salts have a low energy of dissociation and may be dissolved in a suitable polymer to produce a polymer solid electrolyte or in a polar aprotic liquid solvent to produce a liquid electrolyte. The anion of the salts may be covalently attached to polymer backbones to produce polymer solid electrolytes with exclusive cation conductivity.
Claims20
A metal ion salt, wherein the anion is comprised of a mononuclear, polynuclear, or condensed aromatic moiety to which have been attached one or more electron withdrawing groups of the formula SO.sub.2 CF.sub.3 and one or more hydroxy, amino, or imino groups capable of forming a salt with a metal ion, wherein said hyroxy, amino, or imino group is conjugated with at least one SO.sub.2 CF.sub.3 substituent on an aromatic ring, or wherein separate said aromatic moieties substituted as described above are bonded together by an --SO.sub.2 -- group.
A polyelectrolyte comprising a flexible polymer backbone and covalently attached anions of a metal ion salt wherein the anion is comprised of a mononuclear, polynuclear, or condensed aromatic moiety to which have been attached one or more electron withdrawing groups of the formula SO.sub.2 CF.sub.3 and one or more hydroxy, amino, or imino group groups capable of forming a salt with a metal ion, wherein said hydroxy, amino, or imino group is conjugated with at least one SO.sub.2 CF.sub.3 substituent on an aromatic ring, or wherein separate said aromatic moieties substituted as described above are bonded together by an --SO.sub.2 -- group.
An electrochemical cell comprising a positive electrode, a negative electrode and a liquid electrolyte, said liquid electrolyte comprising a polar aprotic solvent, and a metal ion salt wherein the anion is comprised of a mononuclear, polynuclear, or condensed aromatic moiety to which have been attached one or more electron withdrawing groups of the formula SO.sub.2 CF.sub.3 and one or more hydroxy, amino, or imino groups capable of forming a salt with a metal ion, wherein said hydroxy, amino, or imino group is conjugated with at least one SO.sub.2 CF.sub.3 substituent on an aromatic ring, or wherein separate said aromatic moieties substituted as described above are bonded by an --SO.sub.2 -- group.
An electrochemical cell comprising a positive electrode, a negative electrode and a polyelectrolyte having a flexible polymer backbone and covalently attached anions of a metal ion salt, wherein the anion is comprised of a mononuclear, polynuclear, or condensed aromatic moiety to which have been attached one or more electron withdrawing groups of the formula SO.sub.2 CF.sub.3 and one or more hydroxy, amino, or imino group groups capable of forming a salt with a metal ion, wherein said hydroxy, amino, or imino group is conjugated with at least one SO.sub.2 CF.sub.3 substituent on an aromatic ring, or wherein separate said aromatic moieties substituted as described above are bonded together by an --SO.sub.2 -- group.
Dependencies are inferred from the claim text.