# US 12,218,349 B2 · Rechargeable battery cell > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,218,349 B2 - Document ID: US12218349B2 - Status: Granted - Kind: B2 - Application number: 17/514,894 - Filed: 2021-10-29 - Published: 2022-02-17 - Granted: 2025-02-04 - Earliest claimed: 2019-04-30 - Assignees: Innolith Technology AG - Applicants: Innolith Technology AG - Inventors: Laurent Zinck; Christian Pszolla - Web page: https://patentgrep.com/patent/US12218349B2 ## CPC - H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy - H01M 4/587: for inserting or intercalating light metals - H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy - H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines} - H01M 4/622: {being polymers} - H01M 4/623: {fluorinated polymers} - H01M 10/052: Li-accumulators - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/0562: Solid materials - H01M 10/0568: characterised by the solutes - H01M 10/0569: characterised by the solvents - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - H01M 2004/027: {Negative electrodes} - H01M 2004/028: {Positive electrodes} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H01M 2300/0017: Non-aqueous electrolytes - H01M 2300/0071: Oxides - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A rechargeable battery cell has an electrolyte comprising a conducting salt. The electrolyte is based on SO2 and the positive electrode comprises an active material of the composition AxM′yM″z(XO4-mSn), wherein A is an alkali metal, an alkaline earth metal, a metal of group 12 of the periodic table or aluminum, preferably sodium, calcium, zinc, particularly preferably lithium. M′ is at least one metal selected from a group consisting of titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper and zinc. M″ is at least one metal selected from a group consisting of the metals of groups 2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15 and 16 of the periodic table. X is phosphorus or silicon. x is greater than 0. y is greater than 0. z is greater than or equal to 0. n is greater than 0 and m is less than or equal to n. ## Claims ### Claim 1 A rechargeable battery cell having a housing, at least one positive electrode, at least one negative electrode and an electrolyte comprising at least one conducting salt: wherein the electrolyte is based on SO2; and wherein the positive electrode comprises an active material of the composition AxM′yM″z(XO4-mSn); A being an alkali metal, an alkaline earth metal, a metal from group 12 of the periodic table or aluminum, M′ being at least one metal selected from a group consisting of the elements titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper and zinc, M″ being at least one metal selected from a group consisting of the metals of groups 2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15 and 16 of the periodic table, X being selected from a group consisting of the elements phosphorus and silicon, x being greater than 0, y being greater than 0, z being greater than or equal to 0, n being greater than 0 and m being at least 0.001 and less than or equal to n. ### Claim 2 (depends on 1) The rechargeable battery cell according to claim 1, wherein m has a value of at least 0.005. ### Claim 3 (depends on 1) The rechargeable battery cell according to claim 1, wherein A in the active material AxM′yM″z (XO4-mSn) is the metal lithium, X is the element phosphorus and M′ is the metal iron. ### Claim 4 (depends on 1) The rechargeable battery cell according to claim 1, wherein the positive electrode has a thickness of at least 0.25 mm. ### Claim 5 (depends on 1) The rechargeable battery cell according to claim 1, wherein the positive electrode has a mass of active material per unit area of at least 30 mg/cm2. ### Claim 6 (depends on 1) The rechargeable battery cell according to claim 1, wherein a current-carrying capacity based on the area of the positive electrode is at least 10 mA/cm2. ### Claim 7 (depends on 1) The rechargeable battery cell according to claim 1, wherein the positive electrode and/or the negative electrode is/are porous, wherein a porosity of the positive electrode is at most 50%. ### Claim 8 (depends on 1) The rechargeable battery cell according to claim 1, wherein characterized in that the positive electrode and/or the negative electrode has/have a discharge element having a three-dimensional porous metal structure in the form of a metal foam, wherein the porous metal structure optionally extends essentially over the entire thickness of the positive electrode and/or the negative electrode. ### Claim 9 (depends on 8) The rechargeable battery cell according to claim 8, wherein the active material of the positive electrode and/or the negative electrode is distributed essentially homogeneously in the porous metal structure. ### Claim 10 (depends on 1) The rechargeable battery cell according to claim 1, wherein the negative electrode comprises carbon as the active material. ### Claim 11 (depends on 1) The rechargeable battery cell according to claim 1, wherein the negative electrode has a thickness of at least 0.2 mm. ### Claim 12 (depends on 1) The rechargeable battery cell according to claim 1, wherein an amount of the active material of the negative electrode, based on its area, is at least 10 mg/cm2. ### Claim 13 (depends on 1) The rechargeable battery cell according to claim 1, wherein the sulfur dioxide-based electrolyte comprises a concentration of SO2 of at least 1.5 mol SO2 per mole of conducting salt. ### Claim 14 (depends on 1) The rechargeable battery cell according to claim 1, wherein the conducting salt is an aluminate, a halide, an oxalate, a borate, a phosphate, an arsenate or a gallate of an alkali metal or an alkaline earth metal. ### Claim 15 (depends on 1) The rechargeable battery cell according to claim 1, wherein the rechargeable battery cell comprises a plurality of negative electrodes and a plurality of positive electrodes which are stacked alternately in the housing, wherein each positive electrode is enveloped by a sheath. ### Claim 16 (depends on 1) The rechargeable battery cell according to claim 1, wherein the positive electrode and/or the negative electrode comprises a binder present in a concentration of at most 20% by weight. ### Claim 17 (depends on 16) The rechargeable battery cell according to claim 16, wherein the binder comprises a fluorinated binder. ### Claim 18 (depends on 17) The rechargeable battery cell according to claim 17, wherein the fluorinated binder is a polyvinylidene fluoride and/or a terpolymer made from tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride. ### Claim 19 (depends on 16) The rechargeable battery cell according to claim 16, wherein the binder consists of a polymer which is built up from monomeric structural units of a conjugated carboxylic acid or from the alkali, alkaline earth or ammonium salt of said conjugated carboxylic acid or from a combination thereof. ### Claim 20 (depends on 16) The rechargeable battery cell according to claim 16, wherein the binder consists of a polymer based on monomeric styrene and butadiene structural units. ### Claim 21 (depends on 16) The rechargeable battery cell according to claim 16, wherein the binder is selected from the group of carboxymethyl celluloses. ### Claim 22 (depends on 1) The rechargeable battery cell according to claim 1, wherein A is selected from the group consisting of sodium, calcium, zinc, and lithium. ### Claim 23 (depends on 22) The rechargeable battery cell according to claim 22, wherein A is lithium. ### Claim 24 (depends on 1) The rechargeable battery cell according to claim 1, wherein m has a value of at least 0.01. ### Claim 25 (depends on 1) The rechargeable battery cell according to claim 1, wherein m has a value of at least 0.05. ### Claim 26 (depends on 1) The rechargeable battery cell according to claim 1, wherein m has a value of at least 0.1.