# US 12,218,307 B2 · Electrolytic solution, lithium-ion battery, battery module, battery pack and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,218,307 B2 - Document ID: US12218307B2 - Status: Granted - Kind: B2 - Application number: 17/132,583 - Filed: 2020-12-23 - Published: 2021-04-22 - Granted: 2025-02-04 - Earliest claimed: 2018-10-30 - Assignees: Contemporary Amperex Technology (Hong Kong) Limited - Applicants: Contemporary Amperex Technology (Hong Kong) Limited - Inventors: Jianwei Zhu - Web page: https://patentgrep.com/patent/US12218307B2 ## CPC - H01M 10/0567: characterised by the additives - H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy - 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 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)} - H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx - H01M 4/364: {as mixtures} - H01M 4/386: {Silicon or alloys based on silicon} - H01M 4/387: {Tin or alloys based on tin} - H01M 4/483: {for non-aqueous cells (H01M4/485 takes precedence)} - H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) - H01M 4/587: for inserting or intercalating light metals - H01M 10/0568: characterised by the solutes - H01M 2004/028: {Positive electrodes} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H01M 2300/0025: Organic electrolyte - 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 This application relates to the field of batteries, and in particular, to an electrolytic solution and a lithium-ion battery, a battery module, a battery pack and an apparatus that adopt the electrolytic solution. This application provides an electrolytic solution, including an electrolyte and a solvent, and further including an additive A and an additive B. The additive A is selected from at least one of compounds whose chemical structural formula is denoted by Formula I, and the additive B is selected from at least one of compounds whose chemical structural formula is denoted by Formula II. By using the additive A and the additive B together, this application enables films to be formed on surfaces of a positive electrode plate and a negative electrode plate concurrently, thereby significantly improving cycle performance and high-temperature storage performance of the lithium-ion battery, and also ensuring excellent kinetic performance of the lithium-ion battery. ## Claims ### Claim 1 An electrolytic solution, comprising an electrolyte and a solvent, an additive A and an additive B, wherein the additive A comprises: the additive B comprises a compound selected from at least one of compounds whose chemical structural formula is denoted by Formula II-A: in Formula II-A, A, B, C, and D, are each independently selected from F, Cl, Br or I. ### Claim 2 (depends on 1) The electrolytic solution according to claim 1, wherein the additive A further comprises a compound selected from one or more of compounds whose chemical structural formula is denoted by Formula I-B, Formula I-C, or Formula I-D: wherein, R3 and R4 are each independently selected from: H; F; Cl; Br; I; saturated or unsaturated, substituted or unsubstituted C1-C10 aliphatic groups; substituted or unsubstituted C3-C9 cycloalkyls; substituted or unsubstituted C1-C10 alkoxies; substituted or unsubstituted C6-C20 aryls; or, substituted or unsubstituted C3-C20 heteroaryls; and a value of n2 is 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9. ### Claim 3 (depends on 1) The electrolytic solution according to claim 1, wherein the additive B further comprises a compound selected from at least one of compounds denoted by Formula II-B: wherein, J and K are each independently selected from F, Cl, Br or I. ### Claim 4 (depends on 1) The electrolytic solution according to claim 1, wherein a mass of the additive A is 0.01%-10% of a total mass of the electrolytic solution; a mass of the additive B is 0.01%-10% of the total mass of the electrolytic solution; and a mass ratio of the additive A to the additive B is 1:0.1 to 1:10. ### Claim 5 (depends on 1) The electrolytic solution according to claim 1, wherein a mass of the additive A is 0.1%-6% of a total mass of the electrolytic solution; a mass of the additive B is 0.1%-5% of the total mass of the electrolytic solution; and a mass ratio of the additive A to the additive B is 1:0.1 to 1:10. ### Claim 6 (depends on 1) The electrolytic solution according to claim 1, wherein the electrolyte comprises LiPF6. ### Claim 7 (depends on 1) The electrolytic solution according to claim 1, further comprising an additive C, wherein the additive C comprises a cyclic sulfate compound containing an S═O group. ### Claim 8 (depends on 7) The electrolytic solution according to claim 7, wherein a chemical structural formula of the cyclic sulfate compound containing an S═O group is denoted by Formula III: wherein, R6 and R7 are each independently selected from: H; F; Cl; Br; I; saturated or unsaturated, substituted or unsubstituted C1-C10 aliphatic groups; substituted or unsubstituted C3-C9 cycloalkyls; substituted or unsubstituted C1-C10 alkoxies; substituted or unsubstituted C6-C20 aryls; or, substituted or unsubstituted C3-C20 heteroaryls. ### Claim 9 (depends on 7) The electrolytic solution according to claim 7, wherein a chemical structural formula of the cyclic sulfate compound containing an S═O group is denoted by Formula III: wherein, R6 and R7 are each independently selected from H. ### Claim 10 (depends on 7) The electrolytic solution according to claim 7, wherein a mass of the additive C is 0.1%-8% of a total mass of the electrolytic solution. ### Claim 11 (depends on 7) The electrolytic solution according to claim 7, wherein a mass of the additive C is 0.1%-5% of a total mass of the electrolytic solution. ### Claim 12 (depends on 1) The electrolytic solution according to claim 1, wherein the additive A further comprises at least one of compounds denoted by: ### Claim 13 (depends on 6) The electrolytic solution according to claim 6, wherein the electrolyte further comprises one or more of LiBF4, LIN(SO2F)2, LIN(CF3SO2)2, LiClO4, LiAsF6, LiB(C2O4)2, LiBF2(C2O4), LIN(SO2RF)2, or LIN(SO2F)(SO2RF), wherein RF is Cn′F2n′+1, and n′ is 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10. ### Claim 14 A lithium-ion battery, comprising a positive electrode plate, a negative electrode plate, a separator located between the positive electrode plate and the negative electrode plate, and an electrolytic solution, wherein the electrolytic solution comprises an electrolyte and a solvent, an additive A and an additive B, wherein the additive A comprises: the additive B comprises a compound selected from at least one of compounds whose chemical structural formula is denoted by Formula II-A: in Formula II-A, A, B, C, and D are each independently selected from F, Cl, Br or I. ### Claim 15 (depends on 14) The lithium-ion battery according to claim 14, wherein the negative electrode plate comprises artificial graphite. ### Claim 16 (depends on 14) The lithium-ion battery according to claim 14, wherein the negative electrode plate comprises SiOx (x: 0.9-1.8); with respect to 1 gram of the SiOx, a mass of the additive A is 0.0005 g-0.01 g. ### Claim 17 (depends on 15) The lithium-ion battery according to claim 15, wherein a thickness of an active substance layer on a single side of the negative electrode plate is 30 μm-85 μm. ### Claim 18 (depends on 14) The lithium-ion battery according to claim 14, wherein the positive electrode plate comprises a positive electrode active substance, and the positive electrode active substance comprises at least one of compounds denoted by Formula IV: Li1+yNiaCobMe1-a-bO2-zAz IV in Formula IV, −0.1≤y≤0.2, 0.5