WO2022214095A1 - Séparateur de batterie pour dispositif de stockage d'énergie, son procédé de préparation, son système de préparation et dispositif de stockage d'énergie - Google Patents

Séparateur de batterie pour dispositif de stockage d'énergie, son procédé de préparation, son système de préparation et dispositif de stockage d'énergie Download PDF

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WO2022214095A1
WO2022214095A1 PCT/CN2022/085955 CN2022085955W WO2022214095A1 WO 2022214095 A1 WO2022214095 A1 WO 2022214095A1 CN 2022085955 W CN2022085955 W CN 2022085955W WO 2022214095 A1 WO2022214095 A1 WO 2022214095A1
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layer
film
energy storage
storage device
positive electrode
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PCT/CN2022/085955
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English (en)
Chinese (zh)
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庄志
鲍晋珍
刘倩倩
蔡裕宏
程跃
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上海恩捷新材料科技有限公司
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Priority claimed from CN202111068351.2A external-priority patent/CN113809470A/zh
Application filed by 上海恩捷新材料科技有限公司 filed Critical 上海恩捷新材料科技有限公司
Publication of WO2022214095A1 publication Critical patent/WO2022214095A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/403—Manufacturing processes of separators, membranes or diaphragms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • H01M50/491—Porosity

Definitions

  • the invention relates to the field of energy storage devices, in particular to a battery film for energy storage devices and a preparation process thereof, a system and an energy storage device.
  • the basic structure includes a positive current collector layer, a positive active layer, a porous Diaphragm layer, negative electrode active layer, and negative electrode current collector layer, in the existing preparation process, all are first to prepare the finished porous diaphragm layer and the current collector layer laminated with the active layer, and then press the two according to the structural sequence to obtain lithium ions Therefore, there are technical bottlenecks such as low production efficiency and the inability to make further breakthroughs in ultra-thin lithium-ion batteries under the same energy density.
  • the invention provides a battery film for an energy storage device, which comprises a positive electrode layer and an intermediate film in sequence.
  • the present invention also provides an energy storage device, which sequentially includes a positive electrode current collector, the above-mentioned battery film, and a negative electrode current collector.
  • the invention also provides a process for preparing a battery film for an energy storage device, which sequentially includes: forming the intermediate film, coating the intermediate film on-line, and forming the battery film.
  • the present invention also provides a preparation system of a battery film for an energy storage device, comprising: a multi-section oven is arranged in the traveling route of the intermediate film for shaping, and a coating layer for the intermediate film coating slurry is arranged at the interval between the adjacent ovens. cloth device.
  • the beneficial effects of the present invention are: to provide a battery film, which can change the production mode of traditional energy storage devices, and can be directly combined with positive electrode current collectors and negative electrode current collectors to form energy storage devices. While improving the production efficiency of energy devices and greatly reducing production costs, based on the innovation of battery membrane structure, online coating technology and dry battery technology, high energy density and high safety energy storage devices are obtained.
  • Fig. 1 is the structural schematic diagram of the battery film of the present invention
  • the present invention provides a battery film, which at least includes a positive electrode layer and an intermediate film in order to control the thickness of the battery film, and further, a battery
  • the film can also include a positive electrode layer, an intermediate film, and a negative electrode layer in sequence, and the area of the battery film close to the intermediate film is the inner side, and vice versa; the battery film prepared by the present invention can be directly pressed and laminated with the positive electrode current collector layer and the negative electrode current collector layer.
  • the positive electrode layer can be single-layer or multi-layer, which is a functional layer that is dry-pressed on one side of the intermediate film as a film layer or coated on one side of the intermediate film as a coating layer.
  • the positive electrode layer may be a positive electrode bonding layer.
  • the positive active layer is also a uniform monolayer formed by mixing the positive active material, the conductive agent and the binder.
  • the optimal proportion between the positive active material, the conductive agent and the binder is calculated according to the weight ratio. It is: 90:5:5 to 99:0.5:0.5.
  • the positive electrode layer can also be a multi-layer comprising a positive electrode active layer and a positive electrode bonding layer from the inside to the outside near the intermediate film, or further, as shown in Figure 1, the positive electrode layer can also be adjacent to the intermediate film 1 from the inside to the outside. It includes a multi-layered positive electrode active layer 2, a positive electrode conductive layer 3, and a positive electrode bonding layer 4; it can also include a positive electrode bonding layer, a positive electrode active layer, and a positive electrode conductive layer from the inside to the outside near the intermediate film.
  • the above-mentioned conductive agent or positive electrode conductive layer may be a carbon material, preferably any one or a combination of conductive carbon black, graphene, graphite microspheres, and the like.
  • the above-mentioned binder or positive electrode binder may include at least any one or a combination of PVDF, SBR, acrylate, PAA, and polyurethane.
  • the positive electrode layer When the positive electrode layer has a single-layer or multi-layer structure, as mentioned above, it can be dry-pressed on the intermediate film in the order of the laminated structure. Dry spraying, dry electrostatic spraying, etc. are arranged on the interlayer;
  • the functional layers close to the intermediate film can also be sequentially coated and dried in the form of slurry.
  • the coating methods can be listed as extrusion coating and transfer coating. , (micro) gravure coating, spray coating, dip coating and wire rod coating, ion sputtering, PVD, CVD, screen printing, etc.
  • extrusion coating and transfer coating a coating method for sequentially extrude and coat the positive electrode adhesive layer slurry.
  • in-line coating is used to sequentially extrude and coat the positive electrode adhesive layer slurry, The positive electrode conductive layer slurry and the positive electrode active layer slurry are sequentially dried, and finally a film is formed.
  • the intermediate film can be single-layer or multi-layer, and is a functional layer used to support or separate the positive and negative electrodes of the energy storage device. A sort of.
  • the intermediate film when the intermediate film is a porous film, it can be a single-layer or multi-layer porous base film, at least polyolefin, PET, etc. can be listed, and at least one side of the porous base film can be coated with an organic or inorganic coating ,
  • organic and inorganic coatings the materials that can be listed are at least inorganic oxides, inorganic salts, polyimide, PVDF, polyester, etc.; among them, inorganic oxides can be listed as alumina, boehmite, Mg/ Metal oxides such as Al/Be/Si; when the intermediate film is a coating film, the coating method of the coating film can be gravure coating, spray coating, dip coating, wire bar coating, blade coating, spray coating and roll coating, Any one of screen printing, online coating, etc.
  • the online coating here means that compared with the traditional coating film, the porous base film preparation process and the coating process are divided into two independent procedures or production lines. After coating, the coating and the porous base film are dried and shaped at the same time, and the two can be mutually regulated, which not only saves the steps of heat setting and winding of the porous base film, but also obtains better thickness, porosity and consistency of the intermediate film. The bonding force with the positive electrode layer is stronger.
  • the types that can be listed are at least polymer solid electrolyte, oxide solid electrolyte, oxide crystalline solid electrolyte, LiPON type electrolyte, sulfide crystalline solid electrolyte, sulfide glass and glass ceramic solid Electrolyte, the materials that can be listed are at least polyurethane, PEO, PAN, DOL, polycarbonate, PVDF, lithium nitride, fast ion conductor material, wherein, fast ion conductor material can be sodium ion, Mg ion, Zn ion, K ion , Al ions, etc. one or more, such as lithium titanium aluminum phosphate, lithium lanthanum zirconium oxygen, lithium lanthanum thallium oxygen,.
  • the intermediate film When the intermediate film is a porous film, at least it can be prepared by dry stretching, wet phase separation, electrospinning, papermaking and other processes. In particular, the intermediate film is at least one side of the porous base film.
  • the intermediate membrane When coated with an organic or inorganic coating, the intermediate membrane can be prepared by an online coating process; when the intermediate membrane is a solid electrolyte membrane, it can be prepared at least by processes such as papermaking, sintering, casting and casting, and electrospinning. .
  • the negative electrode layer can be a single layer or a multi-layer, which is a functional layer that is dry-pressed on one side of the intermediate film as a film layer or coated on one side of the intermediate film as a coating.
  • the negative electrode layer can be a negative electrode current collector layer. Compared with the prior art, without the negative electrode active material, the energy density of the energy storage device can be improved, and the purpose of reducing the thickness of the energy storage device and reducing the cost is achieved.
  • the negative electrode layer can be a uniform monolayer formed by mixing the negative electrode active material, the conductive agent and the binder; after the negative electrode active material is mixed with the conductive agent and the binder, each component is based on the weight ratio, and the optimal ratio is The interval is: 90:5:5 ⁇ 99:0.5:0.5, among which, the negative electrode active material can at least include carbon materials and silicon-based materials, and the carbon materials can at least include natural graphite, artificial graphite, hard carbon, and mesophase carbon microstructure. Balls, Graphene.
  • the negative electrode layer can also be a multi-layer that includes a negative electrode active layer and a negative electrode bonding layer in turn near the intermediate film, or further, the negative electrode layer can also be a multi-layer that includes a negative electrode active layer, a negative electrode conductive layer, and a negative electrode bonding layer in turn adjacent to the intermediate film.
  • the layer can also include a negative electrode bonding layer, a negative electrode active layer, and a negative electrode conductive layer in sequence from the inside to the outside near the intermediate film.
  • the above-mentioned binder or negative electrode binder may include at least any one or a combination of PVDF, PVDF-HFP, SBR, acrylate, PAA, and polyurethane.
  • the specific structure of the battery film can be any combination or combination of the above-mentioned layer structure schemes.
  • the negative electrode layer When the negative electrode layer has a single-layer or multi-layer structure, as mentioned above, it can be dry-pressed on the intermediate film in the order of the laminated structure. Dry spraying, dry electrostatic spraying, etc. are arranged on the interlayer;
  • the functional layers close to the intermediate film can also be sequentially coated and dried in the form of slurry.
  • the coating methods can be listed as extrusion coating and transfer coating. , (micro) gravure coating, spray coating, dip coating and wire rod coating, ion sputtering, PVD, CVD, evaporation, magnetron sputtering, vacuum plating, etc.
  • the negative electrode adhesive layer slurry, the negative electrode adhesive layer slurry, the negative electrode adhesive layer slurry, the negative electrode adhesive layer slurry, the negative electrode adhesive layer slurry, the negative electrode adhesive layer slurry, the negative electrode adhesive layer slurry, the negative electrode adhesive layer slurry, the negative electrode adhesive layer slurry, The negative electrode conductive layer slurry and the negative electrode active layer slurry are sequentially dried, and finally a film is formed.
  • the method for producing the above-mentioned high-energy-density battery film is not particularly limited as long as a battery film having the above-mentioned structure can be obtained.
  • the present invention provides a preparation process, which sequentially includes: forming the intermediate film, on-line coating of the intermediate film, and forming the battery film.
  • the above setting may be any one of normal temperature setting, low temperature setting, radiation setting, pressure setting, chemical or electrochemical reaction curing setting.
  • the preparation process sequentially includes: heat setting of the intermediate film, on-line coating of the intermediate film, and heat setting of the battery film.
  • the thermal setting of the intermediate film and the drying of the coating layer by layer are synchronized. It can effectively improve production efficiency and reduce production costs.
  • this process can shorten the production time, and the obtained battery film
  • the consistency is better, the bonding force between the coating and the interlayer is stronger, the interface impedance level is excellent, the flexibility is better, and the shape and size are more flexible.
  • the above-mentioned coating process corresponds to a coating system for a battery separator, including: a plurality of film setting devices are arranged in the traveling route of the intermediate film setting, and a spacer for the intermediate film coating slurry is arranged at the interval position of the adjacent film setting devices. coating device.
  • the membrane setting device and coating device are not particularly limited, and the number or type can be selected according to the preparation process and the stacking structure of the positive electrode layer or the negative electrode layer.
  • a multi-section oven is provided in the traveling route of the heat-setting of the interlayer, and a coating device for coating slurry of the interlayer is provided at the interval between adjacent ovens.
  • each subgroup includes a coating device, a preliminary heat setting oven located upstream of the coating device for preliminary drying of the interlayer film, The coating and heat-setting oven downstream of the cloth device is used for drying the battery film.
  • the number of ovens can be reduced or added according to actual needs.
  • the energy storage devices of the present invention include but are not limited to the fields of lithium ion batteries, sodium ion batteries, magnesium ion batteries, zinc ion batteries, solid-state batteries, semi-solid-state batteries, lithium-sulfur batteries, and flow batteries, and specifically, include positive electrode current collectors in sequence.
  • the battery film of any one of the above, the negative electrode current collector wherein, the material of the positive electrode current collector at least has a conductive material, and the conductive material is preferably Cu, AL, Ni; the material of the negative electrode current collector has at least a conductive material or a negative electrode metal material, and the negative electrode metal
  • the material is preferably lithium metal and sodium metal.
  • the battery film of the present invention when used in an energy storage device, especially in the field of solid-state batteries or semi-solid state, compared with the prior art, the energy storage device prepared by the present invention has a lower interface impedance than the prior art. The necessary options can still achieve good rate performance, low temperature charge and discharge, and long cycle life.
  • the energy storage device sequentially includes a positive electrode sheet (including a positive electrode current collector and a positive electrode active material), a battery film, and a negative electrode current collector.
  • the positive electrode current collector, the negative electrode current collector and the battery film are composited, at least ion sputtering, PVD, CVD, off-line composite, lamination and other methods can be used.
  • the positive and negative current collectors and the positive and negative films can also be combined with the dry electrode technology, using dry spraying or dry powder electrostatic spraying technology to obtain the positive and negative electrode pieces and then compound with the intermediate film to obtain the corresponding energy storage device.
  • a polyethylene porous diaphragm with a thickness of 9um is used, and a layer of lithium iron phosphate positive electrode layer with a thickness of 10um is formed on one side of the porous diaphragm by vacuum plating to form a battery film.
  • the compounding method is lamination compounding, wherein the anode layer side is compounded with aluminum foil, and the negative electrode layer side is compounded with copper foil.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • a polyethylene porous membrane with a thickness of 9um is used.
  • One side of the porous membrane is coated with a positive electrode layer with a thickness of 80um to form a battery film.
  • the positive electrode layer is composed of NCM, PVDF and conductive carbon in a ratio of 96:2:2.
  • copper foil and aluminum foil are respectively arranged on both sides of the battery film to form an electrochemical device.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • a polypropylene porous membrane with a thickness of 12um is used.
  • One side of the porous membrane is coated with a PVDF layer with a thickness of 2um and a positive electrode layer with a thickness of 80um to form a battery membrane.
  • the aluminum foil forms an electrochemical device.
  • the positive electrode current collector and the positive electrode layer are composited through the PVDF layer coated on the positive electrode layer.
  • the composite method of the negative electrode current collector is lamination composite, wherein the positive electrode layer side is composited with aluminum foil, and the negative electrode layer side is composited with copper foil.
  • a polypropylene porous membrane with a thickness of 12um is used.
  • One side of the porous membrane is vacuum-plated with an NCM positive electrode layer with a thickness of 10um, and then a PVDF layer is applied to form a battery film.
  • the foil and the aluminum foil form an electrochemical device.
  • the positive electrode current collector and the positive electrode layer are composited by the PVDF layer coated on the positive electrode layer.
  • the composite method of the negative electrode current collector is lamination composite, wherein the positive electrode layer side is composited with aluminum foil, and the negative electrode layer side is composited with copper foil.
  • a polyethylene porous membrane with a thickness of 9um is used.
  • One side of the porous membrane is vacuum-plated with an NCM positive electrode layer with a thickness of 10um.
  • a conductive carbon layer and a PVDF layer are sequentially coated on the positive electrode side to form a battery film. Then the battery The film composites the positive electrode current collector and the negative electrode current collector, wherein the positive electrode layer side is composited with aluminum foil, and the negative electrode layer side is composited with copper foil.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • a polyethylene porous diaphragm with a thickness of 9um is used.
  • One side of the porous diaphragm is sequentially provided with a layer of PMMA coating and a NCA positive electrode layer with a thickness of 10um by in-line coating.
  • the conductive carbon layer and PVDF layer are coated to form a battery film, and then the positive electrode current collector and the negative electrode current collector are combined, wherein the positive electrode layer side is combined with aluminum foil, and the negative electrode layer side is combined with copper foil.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • a polyethylene porous diaphragm with a thickness of 9um is used, and one side of the porous diaphragm is sequentially coated with an alumina coating, an LCO layer, a conductive carbon layer and a PVDF layer by successive online coating to form a battery film, and then the composite cathode current collector and A negative electrode current collector, wherein the positive electrode layer side is compounded with aluminum foil, and the negative electrode layer side is compounded with copper foil.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • a polyethylene porous membrane with a thickness of 9um is used.
  • One side of the porous membrane is coated with alumina coating, PVDF layer and NCM layer by successive online coating.
  • the other side of the porous membrane is coated by online coating.
  • the negative electrode slurry is composed of Si:SBR:conductive carbon 90:5:5 to form a battery film, and then composite the positive electrode current collector and the negative electrode current collector, wherein the positive electrode layer side is composited with aluminum foil, and the negative electrode layer side is composited with copper foil.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • a LLZTO layer with a thickness of 20 um is used, and an NCM with a thickness of 10 um is set on one side of the LLZTO by vacuum plating to form a battery film, and then the positive electrode current collector and the negative electrode current collector are compounded, wherein the positive electrode layer side is compounded with aluminum foil, and the negative electrode layer side is compounded Li metal.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • the LGPS layer with a thickness of 20um is used, and the NCM with a thickness of 10um is set on one side of the LGPS by vacuum plating, and then PVDF is coated on the other side of the NCM to form a battery film.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • a PEO layer with a thickness of 20 um is used, and a layer of lithium iron phosphate, a conductive carbon layer and a PVDF layer with a thickness of 10 um are successively coated on one side of the PEO to form a battery film.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • a polyethylene porous diaphragm with a thickness of 9um is used, and one side of the porous diaphragm is sequentially coated with alumina coating, multi-element Fe-based transition metal Na oxide layer, conductive graphene layer and PVDF layer by successive online coating.
  • the other side of the battery is coated with hard carbon, etc., conductive carbon layer and SBR layer in turn by in-line coating to form a battery film, and then both sides are compounded with aluminum foil current collectors.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • a PEO film with a thickness of 20um is used.
  • One side of the PEO film is coated with a multi-element Fe-based transition metal Na oxide layer, a conductive carbon layer and a PVDF layer by successive online coating, and hard carbon is coated on the other side of the PEO film.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • a polyethylene porous diaphragm with a thickness of 9um is used, and one side of the porous diaphragm is sequentially coated with alumina coating, multi-component Mn-based transition metal Na oxide layer, conductive graphene layer and PVDF layer by successive online coating. The other side is coated with a hard carbon layer to form a battery film, and then both sides are compounded with aluminum foil current collectors.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • a PEO film with a thickness of 20um was used, and one side of the PEO film was sequentially coated with a multi-element Fe-based transition metal Na oxide layer, a conductive graphene layer and a PVDF layer by successive online coating to form a battery film, and then both sides were composited and collected. Fluid, the positive side is compounded with Al current collector, and the negative side is compounded with Na metal current collector.
  • the above structures are stacked in sequence to form an energy storage device with a thickness of 35 mm, a length of 40 mm and a width of 90 mm.
  • the positive electrode layer is composed of NCM, PVDF, and conductive carbon in a weight ratio of 90:5:5.
  • the positive electrode layer is composed of NCM, PVDF, and conductive carbon in a weight ratio of 99:0.5:0.5.
  • the negative electrode slurry is composed of Si:SBR:conductive carbon in a mass ratio of 99:0.5:0.5.
  • the negative electrode slurry is composed of Si:SBR:conductive carbon in a mass ratio of 95:2.5:2.5.
  • Impedance Connect the positive and negative electrodes of the battery membrane to the positive and negative electrodes of the electrochemical workstation, select the electrochemical impedance test item, set the disturbance voltage to 10mV, and the frequency range to 0.01Hz to 1,000,000Hz, and record the impedance value.
  • Peeling force between the intermediate film and the positive electrode layer 3M tape was used to stick on both sides of the intermediate layer and the positive electrode layer, respectively, and the sample was cut into a 15mm width, and two pieces of 3M tape were stretched in the direction of 180° with a universal tensile testing machine, respectively. The tensile speed was 50 m/min and the maximum peel force was recorded.
  • the energy density of the battery film charge and discharge with 0.5C current, record the discharge capacity C of the battery film and the voltage platform V, weigh the battery film and record it as M, the energy density calculation formula is C*V/M, and convert the unit. into Wh/kg.
  • Bendability of the battery film Hold the head and tail ends of the battery film with both hands and gently fold them in half. If the bending angle exceeds 45°C, it can be restored to its original state, which is recorded as bendable, otherwise it is recorded as not bendable.
  • the battery films and energy storage devices prepared in Examples 1 to 19 were subjected to the above performance tests under the same test environment, and the performance data were recorded in Table 1 below.
  • the battery film provided by the present invention can be directly pressed and compounded with the positive electrode current collector and the negative electrode current collector to obtain an energy storage device, and the internal resistance and energy density of the energy storage device maintain the leading level of the current industry technology , which can promote the improvement and development of the current energy storage device production process; and further simplify the production process and steps of the battery film through the on-line coating production method, and the obtained battery film has better consistency and the bonding force between the coating and the intermediate film. Stronger, the interface impedance maintains an excellent level, and the flexibility is better.

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Abstract

La présente invention concerne le domaine des dispositifs de stockage d'énergie et, plus précisément, un séparateur de batterie pour un dispositif de stockage d'énergie, son procédé de préparation, son système de préparation et un dispositif de stockage d'énergie. Le séparateur de batterie pour un dispositif de stockage d'énergie comprend une couche d'électrode positive et un séparateur intermédiaire en séquence. Le séparateur de batterie améliore efficacement le rendement de production du dispositif de stockage d'énergie, et permet d'obtenir une densité d'énergie élevée et un dispositif de stockage d'énergie à sécurité élevée sur la base de l'innovation de la structure du séparateur de batterie et de la technologie d'enduction en ligne tout en réduisant considérablement le coût de production.
PCT/CN2022/085955 2021-04-09 2022-04-08 Séparateur de batterie pour dispositif de stockage d'énergie, son procédé de préparation, son système de préparation et dispositif de stockage d'énergie WO2022214095A1 (fr)

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CN202110383749 2021-04-09
CN202110383749.9 2021-04-09
CN202111068351.2A CN113809470A (zh) 2020-09-14 2021-09-13 一种储能器件用的电池膜及其制备工艺、系统与储能器件
CN202111068351.2 2021-09-13

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CN104638213A (zh) * 2015-01-30 2015-05-20 湖南高远电池有限公司 一种超薄二次电池及其制备方法
CN105702899A (zh) * 2016-01-22 2016-06-22 深圳中兴创新材料技术有限公司 一种含涂层的电池隔膜的制备方法及在线涂布系统
CN110323483A (zh) * 2018-03-30 2019-10-11 北京国能电池科技股份有限公司 二次电池及其制备方法与包含其的用电装置
CN110957456A (zh) * 2019-12-16 2020-04-03 国联汽车动力电池研究院有限责任公司 一种无金属集流体复合电极及其制备方法和锂离子电池
CN113809470A (zh) * 2020-09-14 2021-12-17 上海恩捷新材料科技有限公司 一种储能器件用的电池膜及其制备工艺、系统与储能器件

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