12 results about "Lithium imide" patented technology

A lithium ion secondary battery includes, a positive electrode including a positive electrode active material, a negative electrode, and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution includes comprises LiPF6 and a lithium imide salt as an electrolyte, and includes a carbonate-based solvent as a solvent, the lithium ion secondary battery includes or does not include a surplus electrolyte solution, the ratio of the positive electrode capacity to the negative electrode capacity is adjusted to less than 1, the nominal voltage is adjusted to less than 3.6 V, and the total content of LiPF6 and lithium imide salt included in the non-aqueous electrolyte solution per unit battery capacity and the ratio of the positive electrode capacity to the negative electrode capacity are adjusted to satisfy a specific relationship.

The invention belongs to the technical field of lithium metal batteries, and particularly discloses a local high-concentration electrolyte which comprises Li < + > solvated structure raw materials, a carbonyl oxygen type hydrogen bond acceptor and an inert diluent, the Li < + > solvated structure raw materials comprise bis (trifluoromethanesulfonyl) lithium imide, and the carbonyl oxygen type hydrogen bond acceptor can be coordinated with the bis (trifluoromethanesulfonyl) lithium imide to form a deep eutectic solution. The local high-concentration electrolyte is a uniform transparent homogeneous liquid, and has high chemical stability and high ionic conductivity within the temperature range of-40 DEG C to 40 DEG C. The local high-concentration electrolyte has excellent low-temperature cycling stability and safety corresponding to the lithium metal battery, and the coulombic efficiency is basically kept at 100% after 150 cycles under the working condition of-20 DEG C.

The invention relates to a dielectric film with PI (polyimide) for a solid-state battery. The solid-state battery comprises a positive electrode, a negative electrode and a dielectric film located between the positive electrode and the negative electrode. The dielectric film is formed by combining PVDF (Polyvinylidene Fluoride), a plurality of LLZO (Lithium-Lanthanum-Zirconium-Oxide) particles, a polyimide (PI) modifier and LiTFSI (LiN (CF3SO2) 2, bis (trifluoromethanesulfonyl) lithium imide), and is characterized in that the dielectric film is prepared from PVDF (Polyvinylidene Fluoride), a plurality of LLZO particles, a polyimide (PI) modifier and LiTFSI (LiN (CF3SO2) 2, bis (trifluoromethanesulfonyl) lithium imide; wherein the polyimide (PI) modifier is a polymer material having good heat resistance, chemical resistance and electrical insulation; the polyimide (PI) modifier is mixed with the LLZO particles, so that the surface energy of the LLZO particles can be effectively reduced, and the surface stability of the LLZO particles can be improved.

The invention belongs to the technical field of all-solid-state lithium battery electrolytes, and particularly relates to a solid-state lithium metal battery composite polymer electrolyte, a preparation method and application thereof and an all-solid-state battery. The preparation method comprises the following steps: mixing a polyvinylidene fluoride-hexafluoropropylene copolymer, bis (trifluoromethanesulfonyl) lithium imide, polyethylene oxide and LLZO with a solvent to obtain sol, then spreading the sol into a film, and drying to remove the solvent under a standing condition to obtain the solid-state lithium metal battery composite polymer electrolyte. The defects of an existing polymer electrolyte are overcome, and particularly the problems that an electrolyte with polyethylene oxide (PEO) as a matrix is high in crystallinity, low in ionic conductivity, serious in polarization and insufficient in mechanical strength at the room temperature are solved.

The invention relates to a manufacturing method of a dielectric film with a mixed slurry layer of PI for solid and solid-like batteries, and the manufacturing method of the dielectric film comprises the following steps: A, taking a plurality of LLZO particles and a solvent, and mixing the LLZO particles and the solvent to form a first slurry; step B, taking PVDF (Polyvinylidene Fluoride), a polyimide (PI) modifier, AIBN (Azobisisobutyronitrile), LiTFSI (LiN (CF3SO2) 2 and bis (trifluoromethanesulfonyl) lithium imide); the four compounds are mixed to form second slurry; c, adding the second slurry into the first slurry, and mixing to form viscous mixed slurry; and step D, coating one side of a PE (Poly Ethylene) layer with the viscous mixed slurry by using a coating machine to form the mixed slurry layer, and baking the PE layer coated with the mixed slurry layer, and at the moment, the mixed slurry layer is changed into a solid dielectric film to be coated on the PE layer, so that the dielectric film with a two-layer structure is integrally formed.

To provide a technology that can improve the battery performance of a power storage device that uses lithium ions in charging and discharging.SOLUTION: A power storage device 10 includes an electrolyte solution 12 containing a lithium imide salt and an organic solvent, a container 11 filled with the electrolyte solution 12, a positive electrode 30 having a compound containing lithium atoms that ionize in the electrolyte solution 12 and participate in charging and discharging, a negative electrode 20 disposed in the electrolyte solution, having a metal substrate 23 that constitutes a current collector 21, and configured such that a layer of precipitated lithium atoms is formed on the surface during charging, and a separator 15 that is electrically insulating and divides the interior of the container 11 into a first electrode chamber 16 in which the negative electrode is disposed and a second electrode chamber 17 in which the positive electrode 30 is disposed, and that is permeable to lithium ions moving between the first electrode chamber 16 and the second electrode chamber 17.SELECTED DRAWING: Figure 1

The application belongs to the technical field of lithium batteries, and particularly relates to a non-aqueous electrolyte and a battery. The non-aqueous electrolyte comprises an additive, an electrolyte salt and an organic solvent; the additive comprises a first additive and a second additive; the first additive comprises lithium (fluorosulfonyl)(trifluoromethylsulfonyl) imide, and the second additive comprises 2-thiophene boronic acid; the mass percentage of the first additive is a%, and the mass percentage of the second additive is b% based on the mass of the non-aqueous electrolyte; the non-aqueous electrolyte satisfies 0.5 <= a / b <= 100; and 0.05 <= a <= 5, and 0.01 <= b <= 1. In the application, the first additive and the second additive are used in combination, so that the high and low temperature cycle and discharge performance of the battery can be improved, the battery can have excellent safety performance, and the high and low temperature performance and safety performance of the battery can be simultaneously considered.

The invention provides a composite lithium-rich manganese-based positive electrode material, a preparation method thereof and a lithium ion battery containing the composite lithium-rich manganese-based positive electrode material, and belongs to the field of lithium ion batteries. The composite lithium-rich manganese-based positive electrode material is of a core-shell structure, an inner core of the lithium-rich manganese-based positive electrode material is a phase structure gradient lithium-rich manganese-based positive electrode material, a coating layer of the lithium-rich manganese-based positive electrode material comprises a polymer, the polymer comprises strong negative electricity groups and-NH2 groups, and the strong negative electricity groups comprise-C = O and / or-O-C = O. The composite lithium-rich manganese-based positive electrode material prepared by the invention has excellent long cycle performance in a lithium ion battery containing sulfonyl imino lithium salt.

The invention relates to a manufacturing method of a dielectric film with PI for a solid-state battery. The solid-state battery comprises a positive electrode, a negative electrode and a dielectric film, the manufacturing method of the dielectric film comprises the following steps: step A, taking a plurality of LLZO particles and a solvent, and mixing the LLZO particles and the solvent by using a first mixer to form a first slurry; step B, taking PVDF (Polyvinylidene Fluoride), a polyimide (PI) modifier, AIBN (Azobisisobutyronitrile), LiTFSI (LiN (CF3SO2) 2 and bis (trifluoromethanesulfonyl) lithium imide); mixing the four compounds by using a second mixer to form second slurry; c, adding the second slurry into the first slurry according to a certain proportion, and mixing to form mixed slurry; and D, coating one side of the PET layer with the mixed slurry by using a coating machine to form the mixed slurry layer, and putting the mixed slurry layer into an oven for baking, and step E, taking down the dielectric film from the PET layer.

The invention relates to a dielectric film with a mixed slurry layer of PI for a solid-state and solid-state-like battery. The solid-state and solid-state-like battery comprises a positive electrode, a negative electrode and a dielectric film located between the positive electrode and the negative electrode. The dielectric film comprises a PE (Polyethylene) layer and a dielectric layer, wherein the PE (Polyethylene) layer is arranged on the dielectric layer; the at least one dielectric film is arranged on the side edge of the PE layer; the dielectric diaphragm is prepared from PVDF (Polyvinylidene Fluoride), a plurality of LLZO (Lithium-Lanthanum-Zirconium-Oxide) particles, a polyimide (PI) modifier and LiTFSI (LiN (CF3SO2) 2, bis (trifluoromethanesulfonyl) lithium imide) in a combined mode, and the dielectric diaphragm is prepared from the PVDF, the plurality of LLZO particles, the polyimide (PI) modifier and the LiTFSI (LiN (CF3SO2) 2, the bis (trifluoromethanesulfonyl) lithium imide. Wherein the polyimide (PI) modifier is a polymer material having good heat resistance, chemical resistance and electrical insulation; the polyimide (PI) modifier is mixed with the LLZO particles, so that the surface energy of the LLZO particles can be effectively reduced, and the surface stability of the LLZO particles can be improved.

Lithium-sulfur batteries offer theoretical energy densities approaching 2600 Wh / kg—nearly three times higher than conventional lithium-ion batteries. The present disclosure provides co-salt electrolyte compositions combining two or more lithium salts selected from lithium imide salts, lithium halide salts, and lithium oxyanion salts to achieve synergistic performance improvements unattainable with single-salt formulations. These co-salt systems deliver enhanced capacity, superior coulombic efficiency retention, extended cycle life, and reduced self-discharge, enabling lithium-sulfur batteries to meet demanding requirements of next-generation applications including electric aviation, electric vehicles, and grid-scale energy storage. The disclosed formulations address environmental concerns by enabling reduced polyfluorinated substance content while maintaining electrochemical performance. By tailoring co-salt composition in conjunction with cathode design parameters, the technology enables application-specific optimization maximizing energy density or longevity. The result is a versatile electrolyte platform bridging the gap between the theoretical promise of lithium-sulfur chemistry and practical commercial performance requirements.

A lithium ion secondary battery includes a positive electrode including a positive electrode active material, a negative electrode, and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution includes LiPF6 and a lithium imide salt as an electrolyte, and includes a carbonate-based solvent as a solvent, the lithium ion secondary battery includes or does not include a surplus electrolyte solution, the ratio of the positive electrode capacity to the negative electrode capacity is adjusted to less than 1, the nominal voltage is adjusted to less than 3.6 V, and the content of lithium imide salt included in the non-aqueous electrolyte solution per unit battery capacity and the ratio of the positive electrode capacity to the negative electrode capacity are adjusted to satisfy a specific relationship.