Abstract: The present application provides a battery and an electronic device. The battery includes an electrode assembly, a lower casing, a first conductive part, and a second conductive part. An opening is provided at a top of the lower casing; the second conductive part covers the opening of the lower casing; the second conductive part and the lower casing define an accommodating cavity; the electrode assembly is located in the accommodating cavity; the first conductive part is connected to a side of the second conductive part facing the accommodating cavity; a sealing layer is provided between the first conductive part and the second conductive part to insulate the two conductive parts; a through hole is formed on the second conductive part; and at least part of a structure of the first conductive part is exposed out of the accommodating cavity via the through hole.

Abstract: The present disclosure provides a current collector and an application thereof. A first aspect of the present disclosure provides a current collector including M metal layers and N polymer layers. The metal layer and the polymer layer are stacked, where each of L metal layers includes a tab connection region and a non-tab connection region and a thickness of the tab connection region is greater than that of the non-tab connection region, and M?1, N?1, L?1, and M?L. The present disclosure provides a current collector, which effectively improves the welding strength of the tab by performing a thickening treatment on the tab connection region for connecting the tab in the metal layer, thereby improving the binding force between the tab and the current collector and reducing the contact impedance of the tab connection region, and improving the connection qualified rate between the tab and the metal layer.

Abstract: Disclosed are a polymer, a solid-state electrolyte including the polymer, a gel electrolyte, and a battery. The polymer includes a repeating unit A. The repeating unit A has a structure represented by Formula 1. In Formula 1, R1 is selected from H or C1-6 alkyl; R2 is a linking group; R3 is an end-capping group; M is selected from a borate chain segment, an aluminate chain segment, or a phosphate chain segment; and * denotes a linking end. The solid-state electrolyte including the polymer in the present disclosure or the battery including the gel electrolyte has a lower internal resistance, better transmission performance of ions, better cycle performance, a broader electrochemical window, and higher electrochemical stability.

Abstract: Disclosed are a positive electrode plate and a lithium-ion battery including the same. The positive plate includes a positive electrode current collector and a positive electrode coating layer; and the positive electrode coating layer includes a first coating layer and a second coating layer, wherein the first coating layer is coated on the positive electrode current collector surface, and the second coating layer is coated on the first coating layer surface. The lithium-ion battery has a good safety performance, and when mechanical misuse (needling, weight impact) occurs, the probability of battery fire failure is significantly reduced.

Abstract: The present disclosure provides a negative electrode piece, a preparation method thereof and a lithium-ion battery including the negative electrode piece. The negative electrode piece includes a negative electrode current collector, a first negative electrode active material layer, a second negative electrode active material layer, and a negative electrode tab, where the negative electrode tab is arranged on a surface of one side of the negative electrode current collector, and a surface of one side of the negative electrode current collector near the negative electrode tab and providing with the negative electrode tab is coated with the first negative electrode active material layer, a surface of one side of the negative electrode current collector away from the negative electrode tab and providing with the negative electrode tab is coated with the second negative electrode active material layer.

Abstract: Disclosed are a separator and a battery. The separator includes a porous substrate, functional particles, and a coating layer. The functional particles are filled up in internal pores of the porous substrate, and the coating layer is arranged on the upper and lower surface of the porous substrate; the functional particles are oxides of which the outer layers comprise —NH or —NH2 groups. As the functional particles are contained in the separator, the —NH— or —NH2 groups can effectively adsorb an acidic substance in a lithium ion battery; the acid content in the lithium ion battery is reduced, and hydrophilic groups on the outer layers of the functional particles can improve the wettability of an electrolyte, increase lithium ion channels, and improve a liquid retention rate of the separator. Therefore, the separator provided in the present disclosure can improve cycling performance and safety performance.

Abstract: Disclosed are a separator and a battery including the separator. The separator includes a separator base layer and a ceramic coating disposed on a first surface of the separator base layer. The ceramic coating includes ceramic particles. One or more of a surface and an interior of the ceramic coating have micropores. A porosity of the ceramic coating ranges from 40% to 80%. In the micropores, a volume of pores with apertures greater than 0.1 microns occupies 45%-90% of a total pore volume, and a volume of pores with apertures greater than 1.0 micron occupies 40%-80% of the total pore volume. In the present disclosure, a porosity of the separator is improved, and a rate, a residual liquid volume, low-temperature discharging performance, and cycling performance of the battery are improved. In addition, separator nail penetration strength, self-discharging performance, and safety performance are not affected.

Abstract: Disclosed are a negative electrode plate and a battery. A first negative active material layer is disposed at a bottom layer, and includes a first binder resistant to electrolyte swelling, has a better chemical corrosion resistance, and is not easy to age, so as to ensure long-term bonding, and reduce battery cell expansio. The negative electrode plate can maintain good mechanical strength and elongation at immersion of the electrolyte, so as to ensure that it is not separatedr. A second binder in a second negative active material layer away from the negative current collector uses a high swelling material, the high-swelling binder is in good affinity with the electrolyte, and the electrolyte infiltration speed is good, which facilitates lithium ion conduction. Furthermore, the high-swelling binder is bound to the separator well in a hot pressing process, so as to improve an interface bonding effect.

Abstract: Disclosed are a positive electrode plate and a lithium-ion secondary battery containing the positive electrode plate. In the present disclosure, a polymer electrolyte prepared from a polymer that is different from a polymer used in the conventional technology, and the solid electrolyte, having not only a binding function but also a lithium-conducting function, may replace a binder and a solid electrolyte in an existing electrode plate, so that transmission performance of lithium ions can be effectively improved, and an internal resistance of a solid-state battery can be reduced. In addition, a porosity of a positive electrode plate containing the solid electrolyte is low. This effectively improves energy density and cycling performance of the solid-state battery. The positive electrode plate containing the solid electrolyte may be applied to a battery system having high energy density, thereby broadening a disclosure range of the positive electrode plate.

Abstract: Disclosed are a positive electrode plate and a lithium-ion battery including the positive electrode plate. The positive electrode plate includes a positive current collector, a safety coating layer, a composite fusion layer, and a positive active material layer; the safety coating layer comprises a first conductive agent, a first binder, a functional microsphere, and an auxiliary agent. The safety coating layer has conductive performance at normal temperature, and has the advantages of increasing a contact area between an active material and the current collector, improving the electrical conductivity, and effectively reducing polarization of the battery; when the use temperature of the positive electrode plate reaches 120° C. or above, the functional microsphere will be melted to form a plurality of continuous electron blocking layers, the coating layer blocks current, internal blocking is formed inside the battery, and the occurrence of further thermal runaway of the battery is prevented.

Abstract: The present application provides a positive electrode sheet, a preparation method thereof, and a lithium-ion battery including the positive electrode sheet. The positive electrode sheet includes a positive electrode current collector, and the positive electrode current collector includes a single-sided coated area and a double-sided coated area. In the single-sided coated area, a first coating layer is disposed on a first surface of the positive electrode current collector, the first coating layer includes a first and a second positive electrode active material layer, the second positive electrode active material layer is disposed on the surface of the positive electrode current collector, and the first positive electrode active material layer is disposed on a surface of the second positive electrode active material layer, and a particle size of the first positive electrode active material is larger than a particle size of the second positive electrode active material.

Abstract: A negative electrode piece and a secondary battery including the same. A type of polymer different from that in the prior art is selected as a component in the negative electrode piece, the polymer has high elasticity, high extensibility, can replace the polymer in the existing negative electrode piece, and can effectively improve and enhance the transmission performance of lithium ions and reduce the internal resistance of the lithium-ion battery. At the same time, it can effectively reduce side reactions caused by the expansion of the negative electrode piece, improve lithium conductive channels inside the negative electrode piece, and improve battery performance of the negative electrode piece during the battery cycling.

Abstract: A positive electrode piece and a secondary battery including the same. By selecting a type of polymer electrolyte prepared from a polymer different from that in the prior art as the solid electrolyte in the positive electrode piece, the solid electrolyte have both a bonding function and a lithium conduction function, may replace a binder and a solid electrolytes in an existing electrode piece, can effectively improve and enhance the lithium ion transmission performance, and reduce the internal resistance of the battery. Meanwhile, the positive electrode piece including the solid electrolyte has a low porosity, below about 5%, which greatly reduces voids and holes in the positive electrode piece, increases the content of the positive-electrode active material in unit volume, improves the transmission of lithium ions and electrons, and effectively improves the energy density, cycling performance and rate performance of the battery.

Abstract: A positive electrode sheet containing a high-safety heat-sensitive coating and a lithium-ion battery containing the positive electrode sheet are provided. The heat-sensitive coating includes a first conductive agent, a first binder, heat-sensitive polymer microspheres and an auxiliary agent, and has a conductive property at normal temperature and also has advantages of increasing a contact area between an active material and a current collector, improving the conductivity, and effectively reducing the polarization of battery and the like; when the use temperature of the positive electrode sheet reaches 120° C. and above, the heat-sensitive polymer microspheres will melt to form a plurality of continuous electron blocking layers, current blocking occurs in the coating, an internal blocking forms inside the battery, thereby preventing the occurrence of further thermal runaway of lithium-ion battery.

Abstract: Disclosed are a positive electrode plate and a battery including the positive electrode plate. The positive electrode plate includes a positive electrode current collector, at least one thermosensitive coating layer, at least one composite fusion layer, and at least one positive electrode active material layer. The thermosensitive coating layer has electrical conductivity at room temperature, and has advantages of increasing a contact area between the active material and the current collector, effectively reducing battery polarization, and the like. When a temperature of the positive electrode plate during use reaches a thermosensitive temperature and higher, thermosensitive polymer microspheres melt to form at least one continuous electron blocking layer, therefore forming a current blockage, and an internal blockage is formed inside the battery, thereby preventing further thermal runaway of a secondary battery, and improving safety performance of the secondary battery.

Abstract: A current collector and a preparation method and application thereof, where the current collector includes a first metal layer and a second metal layer provided in a laminated manner, at least one first region and at least one second region are included between the first metal layer and the second metal layer, and the first region and the second region are alternately arranged in a first direction; the first region is provided with a polymer layer, and the polymer layer is respectively bonded to the first metal layer and the second metal layer through an adhesive layer. The current collector of the present application not only has a high welding yield, effectively saving the production cost of the lithium ion battery, but also can reduce the internal resistance of the lithium ion battery, significantly improving the cycle performance and the safety performance of the lithium ion battery.

Abstract: A negative electrode sheet, its fabricating method, and a battery containing negative electrode sheet are provided. The negative electrode sheet includes: a current collector; a first active layer provided on a surface of at least one side of the current collector, and a second active layer provided on a surface of one side of the first active layer away from the current collector, the first active layer is different from the second active layer, the first active layer includes a first active material including a first graphite, and the second active layer includes a second active material including a second graphite; and a ratio of the second capacity ratio for the second active material to the first capacity ratio for the first active material is greater than 1.

Abstract: The present disclosure provides a negative electrode sheet, a preparation method thereof and a lithium ion battery containing the same. The negative electrode sheet includes a negative electrode current collector, where the negative electrode current collector includes a single-sided coating area and a double-sided coating area; in the double-sided coating area, second coating layers are disposed on both side surfaces of the negative electrode current collector, respectively, wherein each of the second coating layers includes a first negative electrode active material layer and a second negative electrode active material layer, the second negative electrode active material layer is disposed on a surface of the negative electrode current collector, and the first negative electrode active material layer is disposed on a surface of the second negative electrode active material layer.

Abstract: The present application provides a positive electrode sheet, a preparation method thereof, and a lithium-ion battery including the positive electrode sheet. The positive electrode sheet includes a positive electrode current collector, and the positive electrode current collector includes a single-sided coated area and a double-sided coated area. In the single-sided coated area, a first coating layer is disposed on a first surface of the positive electrode current collector, the first coating layer includes a first positive electrode active material layer and a second positive electrode active material layer. A content of a first conductive agent for forming the first positive electrode active material layer is less than a content of a second conductive agent for forming the second positive electrode active material layer.

Abstract: The preparation method of the solid polymer electrolyte includes the following steps: S1, adding a vinyl boron fluorine monomer, a vinyl polyether monomer, a modified monomer, and a functional polymer into a solvent, adding an initiator for reaction, and after performing a purification treatment to obtain a polymer system B; S2, adding the polymer system B, a lithium salt, a filler, and an auxiliary agent into a solvent, and adding a crosslinking agent to obtain a mixed solution, and coating the mixed solution on a mold uniformly for reaction; S3, obtaining the solid polymer electrolyte. The obtained solid polymer electrolyte, a positive electrode plate, and a negative electrode plate are assembled into a solid-state battery core, and then a tab welding, a heat treatment, and an encapsulation treatment are performed to obtain a lithium ion battery.