Composition, preparation method therefor and use thereof in battery slurry

Abstract

The present application relates to the field of solar cells, and in particular to a composition, a preparation method therefor and a use thereof in battery slurry. The present application provides a composition, comprising: silver powder, glass powder, and an organic vehicle. The glass powder comprises first-system glass powder and second-system glass powder; the first-system glass powder consists of a network former and a network modifier; and the second-system glass powder contains any one or more of Ti, Zr, and W. The present application further provides a preparation method for the described composition. The present application further provides a use of the described composition or a product obtained by means of the described preparation method in battery slurry. In the present application, by means of the formulation design of the glass powder and the dosage adjustment of the glass powder, the problem of excessive porosity caused by low silver content is mitigated. Furthermore, experimental measurements show that the prepared composition has excellent electrical properties, good acid resistance and water resistance, and enhanced solder resistance.

Description

A composition, a preparation method and its application in battery slurry

[0001] This application claims priority to Chinese Patent Application No. 202411179657.9, filed on August 27, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application belongs to the field of solar cells, and particularly relates to a composition, a preparation method thereof, and its application in a battery slurry. Background Technology

[0003] TOPCon (Tunnel Oxide Passivated Contact) batteries are a type of passivated contact battery. Their core feature is the preparation of an ultra-thin layer of silicon oxide on the back of the battery, followed by the deposition of a thin layer of doped silicon. Together, they form a passivated contact structure. This structure utilizes the quantum tunneling effect, allowing majority carriers to tunnel through while blocking minority carriers from passing through. This effectively reduces surface recombination and metal contact recombination, thereby improving the battery's conversion efficiency.

[0004] To achieve better efficiency in TOPCon cells, both the front and back slurries need to be sintered under conditions that maximize the minority carrier lifetime of the TOPCon cells. During the sintering process, silver powder significantly impacts the cost of the slurry and the cost per cell. Reducing the silver content is a common consideration for cost reduction and efficiency improvement to reasonably control costs and ensure cell reliability. However, directly reducing the silver content makes it difficult for the grid lines to form a dense, integrated structure after sintering. Excessive porosity poses significant risks to the cell's water resistance, solderability, acid resistance, peel strength, and long-term reliability. Furthermore, during photovoltaic module welding, excessively high porosity in the fine grid lines can reduce their solderability, leading to EL failure defects at the corresponding fine grid lines after stringing.

[0005] Therefore, developing a composition, preparation method, and its application in battery slurry to address the technical shortcomings of existing technologies that make it difficult to balance the economic benefits of battery preparation with good battery performance has become an urgent problem for those skilled in the art. Summary of the Invention

[0006] Therefore, it is necessary to address the technical shortcomings of existing technologies that make it difficult to balance the economic benefits of battery manufacturing with good battery performance, and to provide a composition, preparation method, and its application in battery slurry.

[0007] This application provides a composition, the raw materials of which include: silver powder, glass powder and organic carrier;

[0008] The glass powder includes a first system glass powder and a second system glass powder. The first system glass powder is composed of a network forming body and a network modifying body. The network forming body is selected from any one or more metal oxides containing Te, Pb, Bi, Si and Zn, and the network modifying body is an alkali metal oxide and / or an alkaline earth metal oxide. The second system glass powder contains any one or more of Ti, Zr and W, and the glass transition temperature Tg of the second system glass powder is between 450℃ and 600℃.

[0009] In one embodiment, by mass percentage, each 100% of glass powder comprises: 55% to 90% of first-system glass powder and 10% to 45% of second-system glass powder.

[0010] In one embodiment, the raw materials of the composition include: 65-85 parts of silver powder, 3-15 parts of glass powder, and 11-25 parts of organic carrier.

[0011] In one embodiment, the raw materials of the composition further include inorganic additives.

[0012] In one embodiment, the raw materials of the composition include: 65-85 parts of silver powder, 3-15 parts of glass powder, 11-25 parts of organic carrier, and 1-10 parts of inorganic additives.

[0013] In one embodiment, the inorganic additive is a submicron-sized powder with a D50 of 50 nm to 1000 nm, and the inorganic additive is selected from any one or more of alumina, titanium dioxide, silicon dioxide, silicon nitride, and zirconium oxide.

[0014] This application also provides a method for preparing a composition comprising any one of the above-described compositions, wherein the preparation method is as follows:

[0015] Step 1: Preparation of organic carrier: Butyl carbitol, butyl carbitol acetate, diethylene glycol dibutyl ether, tripropylene glycol monomethyl ether and alcohol ester dodecyl are mixed for the first time, then mixed with hydroxyethyl cellulose for the second time, and then polyamide wax is added for the third time under heating conditions to obtain organic carrier.

[0016] Step 2: Preparation of slurry: After premixing silver powder and glass powder, they are mixed again with the organic carrier and stirred. The intermediate product after stirring is rolled to disperse and homogenize, and then filtered to obtain the product.

[0017] This application also provides a method for preparing a composition comprising any one of the above-described compositions, wherein the preparation method is as follows:

[0018] Step 1: Preparation of organic carrier: Butyl carbitol, butyl carbitol acetate, diethylene glycol dibutyl ether, tripropylene glycol monomethyl ether and alcohol ester dodecyl are mixed for the first time, then mixed with hydroxyethyl cellulose for the second time, and then polyamide wax is added for the third time under heating conditions to obtain organic carrier.

[0019] Step 2: Mixing inorganic additives: The organic carrier and inorganic additives are mixed for the fourth time to obtain an organic-inorganic mixed system;

[0020] Step 3: Preparation of slurry: After premixing silver powder and glass powder, they are mixed again with the organic-inorganic mixed system and stirred. The intermediate product after stirring is rolled to disperse and homogenize, and then filtered to obtain the product.

[0021] This application also provides the use of the composition or product obtained by any of the above-described preparation methods in battery slurry.

[0022] In summary, this application provides a composition comprising: silver powder, glass powder, and an organic carrier; the glass powder comprises a first system glass powder and a second system glass powder, the first system glass powder being composed of a network forming body and a network modifying body, the network forming body being selected from any one or more metal oxides containing Te, Pb, Bi, Si, and Zn, and the network modifying body being an alkali metal oxide and / or an alkaline earth metal oxide; the second system glass powder containing any one or more of Ti, Zr, and W, and the glass transition temperature Tg of the second system glass powder being between 450℃ and 600℃. This application also provides a method for preparing the above composition, and further provides an application of the above composition or the product obtained by the above preparation method in battery slurry. In the technical solution provided by this application, the problem of excessive porosity caused by low silver content is improved by adjusting the formulation of the glass powder. Further experimental testing shows that the prepared composition has good electrical properties and good acid and water resistance. The composition, preparation method, and application in battery slurry provided by the embodiments of this application solve the technical defects in the prior art that make it difficult to balance the economic benefits of battery preparation and good battery performance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 is a schematic diagram of one preparation process of a composition preparation method in the technical solution provided in the embodiments of this application;

[0025] Figure 2 is a schematic diagram of another preparation process of a composition preparation method in the technical solution provided in the embodiments of this application. Detailed Implementation

[0026] This application provides a composition, a preparation method, and its application in battery slurry, which addresses the technical shortcomings of the prior art that make it difficult to balance the economic benefits of battery preparation with good battery performance.

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings and examples. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] The following embodiments, in conjunction with Figures 1 and 2, will further illustrate a composition, preparation method, and application in battery slurry provided in this application.

[0034] Example 1

[0035] This embodiment is a specific example of preparing composition product 1.

[0036] In this embodiment, the raw materials of product 1, by mass percentage, include: 83% silver powder, 3.6% first system glass powder 1, 1% second system glass powder 1, and 12.4% organic carrier 1.

[0037] In this embodiment, the first system of glass powder 1 consists of: the sum of TeO2, PbO, Bi2O3, ZnO, WO3, SiO2, TiO2, Al2O3, and ZrO2, which are 10% to 80% by molecular molar percentage of oxides; the sum of Na2O, Li2O, K2O, MgO, CaO, and BaO, which are 10-20%; and Tg < 350℃. The second system of glass powder 1 consists of: the sum of PbO, Bi2O3, Li2O, BaO, ZnO, and their corresponding halides, which are 10% to 30% by molecular molar percentage of oxides; the sum of TiO2, SiO2, B2O3, Al2O3, ZrO2, and WO3, which are 70-90%; and Tg ≥ 450℃.

[0038] 1.1 Preparation of organic slurry

[0039] By mass percentage (the total content of the organic carrier is 100%), weigh 10% butyl carbitol, 60% butyl carbitol acetate, 5% diethylene glycol dibutyl ether, 10% tripropylene glycol monomethyl ether and 10% ethyl alcohol dodecyl alcohol for the first mixing. After the first mixing is uniform, mix it with 7% hydroxyethyl cellulose for the second mixing. Then add 3% polyamide wax, heat to 80°C and mix for the third time for 60 minutes. Cool to room temperature to obtain organic carrier 1.

[0040] 1.2 Preparation of slurry

[0041] After premixing silver powder and glass powder 1, the mixture is added to organic carrier 1 and mixed again with organic carrier 1. The mixture is stirred for 120 minutes. The intermediate product after stirring is rolled 6 times on a three-roll mill to further disperse and homogenize it. When the scraper fineness is less than 5 μm, it is filtered with 400 mesh filter cloth to obtain product 1.

[0042] Example 2

[0043] This embodiment is a specific example of preparing composition product 2.

[0044] In this embodiment, the raw materials of product 2, by mass percentage, include: 81% silver powder, 3.6% first system glass powder 2, 1% second system glass powder 2, 12.4% organic carrier 2 and 2% inorganic additives 2.

[0045] In this embodiment, the first system of glass powder 2 consists of: 10%–80% by molecular molar percentage of oxides, including TeO2, PbO, Bi2O3, ZnO, WO3, SiO2, TiO2, Al2O3, and ZrO2; and 10–20% by molecular molar percentage of Na2O, Li2O, K2O, MgO, CaO, and BaO, with a Tg < 350℃. The second system of glass powder 2 consists of: 10%–30% by molecular molar percentage of oxides, including PbO, Bi2O3, Li2O, BaO, ZnO, and their corresponding halides; and 70–90% by molecular molar percentage of TiO2, SiO2, B2O3, Al2O3, ZrO2, and WO3, with a Tg ≥ 450℃. The inorganic additive 2 is a submicron inorganic additive, specifically titanium dioxide powder of 100–1.2 μm.

[0046] 2.1 Preparation of organic slurry

[0047] By mass percentage (the total content of organic carrier at this time is 100%), weigh 10% butyl carbitol, 60% butyl carbitol acetate, 5% diethylene glycol dibutyl ether, 10% tripropylene glycol monomethyl ether and 10% ethyl alcohol dodecyl alcohol for the first mixing. After the former is mixed evenly, it is mixed with 7% hydroxyethyl cellulose for the second mixing. Then, 3% polyamide wax is added and heated to 80°C for the third mixing and stirring for 60 minutes. After cooling to room temperature, organic carrier 2 is obtained.

[0048] 2.2 Mixed Inorganic Additives

[0049] The organic carrier 2 and the inorganic additive 2 are mixed for the fourth time. After the mixture is homogeneous, an organic-inorganic mixed system 2 is obtained.

[0050] 2.3 Preparation of slurry

[0051] After premixing silver powder and glass powder 2, the mixture is added to organic-inorganic mixture 2, mixed again and stirred for 120 minutes. The intermediate product after stirring is rolled 6 times on a three-roll mill to further disperse and homogenize. When the scraper fineness is less than 5μm, it is filtered with 400-mesh filter cloth to obtain product 2.

[0052] Example 3

[0053] This embodiment is a specific example of preparing composition product 3.

[0054] In this embodiment, the raw materials of product 3, by mass percentage, include: 79% silver powder, 4.4% first system glass powder 3, 2% second system glass powder 3, 11.6% organic carrier 3 and 1% inorganic additive 3.

[0055] In this embodiment, the first system of glass powder 3 consists of: the sum of TeO2, PbO, Bi2O3, ZnO, WO3, SiO2, TiO2, Al2O3, and ZrO2, which are 10% to 80% by molecular molar percentage of oxides; the sum of Na2O, Li2O, K2O, MgO, CaO, and BaO, which are 10-20%; and Tg < 350℃. The second system of glass powder 3 consists of: the sum of PbO, Bi2O3, Li2O, BaO, ZnO, and their corresponding halides, which are 10% to 30% by molecular molar percentage of oxides; the sum of TiO2, SiO2, B2O3, Al2O3, ZrO2, and WO3, which are 70-90%; and Tg ≥ 450℃. The inorganic additives are submicron-sized powders with a D50 of 50nm to 1000nm. The inorganic additive 3 is a submicron spherical inorganic additive, specifically alumina powder of 50-500nm.

[0056] 3.1 Preparation of organic slurry

[0057] By mass percentage (the total content of the organic carrier is 100%), weigh 10% butyl carbitol, 60% butyl carbitol acetate, 5% diethylene glycol dibutyl ether, 10% tripropylene glycol monomethyl ether and 10% ethyl alcohol dodecyl alcohol for the first mixing. After the first mixing is uniform, mix it with 7% hydroxyethyl cellulose for the second mixing. Then add 3% polyamide wax, heat to 80°C and mix for the third time for 60 minutes. Cool to room temperature to obtain organic carrier 3.

[0058] 3.2 Mixed Inorganic Additives

[0059] The organic carrier 3 and the inorganic additive 3 are mixed for the fourth time. After the mixture is homogeneous, an organic-inorganic mixed system 3 is obtained.

[0060] 3.3 Preparation of slurry

[0061] After premixing silver powder and glass powder 3, the mixture is added to organic-inorganic mixture 3, mixed again and stirred for 120 minutes. The intermediate product after stirring is rolled 6 times on a three-roll mill to further disperse and homogenize. When the scraper fineness is less than 5μm, it is filtered with 400-mesh filter cloth to obtain product 3.

[0062] Example 4

[0063] This embodiment is a specific example of preparing composition product 4.

[0064] In this embodiment, the raw materials of product 4, by mass percentage, include: 79% silver powder, 4.4% first-system glass powder 4, 11.6% organic carrier 4, and 5% inorganic additive 4. In this embodiment, the first-system glass powder 4 comprises: 10%–80% of the total molecular molar percentage of oxides TeO2, PbO, Bi2O3, ZnO, WO3, SiO2, TiO2, Al2O3, and ZrO2; and 10-20% of the total molecular molar percentage of Na2O, Li2O, K2O, MgO, CaO, and BaO, with a Tg < 350℃. The inorganic additive has a D50 of 50nm–1000nm, and the inorganic additive 4 is a submicron spherical inorganic additive, specifically 50-500nm alumina powder.

[0065] 4.1 Preparation of organic slurry

[0066] By mass percentage (the total content of the organic carrier is 100%), weigh 10% butyl carbitol, 60% butyl carbitol acetate, 5% diethylene glycol dibutyl ether, 10% tripropylene glycol monomethyl ether and 10% ethyl alcohol dodecyl alcohol for the first mixing. After the first mixing is even, mix it with 7% hydroxyethyl cellulose for the second mixing. Then add 3% polyamide wax, heat to 80°C and mix for the third time for 60 minutes. Cool to room temperature to obtain organic carrier 4.

[0067] 4.2 Mixed Inorganic Additives

[0068] The organic carrier and inorganic additives were mixed for the fourth time. After the mixture was homogeneous, an organic-inorganic mixed system 4 was obtained.

[0069] 4.3 Preparation of slurry

[0070] After premixing silver powder and glass powder 4, the mixture is added to organic-inorganic mixture 4, mixed again and stirred for 120 minutes. The intermediate product after stirring is rolled 6 times on a three-roll mill to further disperse and homogenize. When the scraper fineness is less than 5μm, it is filtered with 400-mesh filter cloth to obtain product 4.

[0071] Example 5

[0072] This embodiment is a specific example of preparing composition product 5.

[0073] In this embodiment, the raw materials of product 5, by mass percentage, include: 77% silver powder, 6.3% first-system glass powder 5, 4.1% second-system glass powder 5, 11.6% organic carrier 5, and 1% inorganic additive 5; in this embodiment, the first-system glass powder 5 is: the sum of TeO2, PbO, Bi2O3, ZnO, WO3, SiO2, TiO2, Al2O3, and ZrO2, by the molecular molar percentage of oxides, is between 10% and 8%. 0%; the sum of Na2O, Li2O, K2O, MgO, CaO, and BaO is 10-20%, Tg < 350℃; the second system of glass powder 5 consists of: the sum of PbO, Bi2O3, Li2O, BaO, ZnO, and their corresponding halides at a molecular molar percentage of 10%–30%, and the sum of TiO2, SiO2, B2O3, Al2O3, ZrO2, and WO3 at 70-90%, Tg ≥ 450℃. The inorganic additives are submicron-sized powders with a D50 of 50nm–1000nm. Inorganic additive 5 is a submicron spherical inorganic additive, specifically 50-500nm silica powder.

[0074] 5.1 Preparation of organic slurry

[0075] By mass percentage (the total content of the organic carrier is 100%), weigh 10% butyl carbitol, 60% butyl carbitol acetate, 5% diethylene glycol dibutyl ether, 10% tripropylene glycol monomethyl ether and 10% ethyl alcohol dodecyl alcohol for the first mixing. After the first mixing is even, mix it with 7% hydroxyethyl cellulose for the second mixing. Then add 3% polyamide wax, heat to 80°C and mix for the third time for 60 minutes. Cool to room temperature to obtain organic carrier 5.

[0076] 5.2 Mixed Inorganic Additives

[0077] The organic carrier and inorganic additives were mixed for the fourth time. After the mixture was homogeneous, an organic-inorganic mixed system 5 was obtained.

[0078] 5.3 Preparation of slurry

[0079] After premixing silver powder and glass powder 5, the mixture is added to organic-inorganic mixture 5, mixed again and stirred for 120 minutes. The intermediate product after stirring is rolled 6 times on a three-roll mill to further disperse and homogenize. When the scraper fineness is less than 5μm, it is filtered with 400-mesh filter cloth to obtain product 5.

[0080] Comparative Example 1

[0081] By weight percentage, it comprises: 85% silver powder, 2.6% glass material, and 12.4% organic carrier.

[0082] In this comparative example, the preparation method includes the following steps:

[0083] Step 1: Preparation of organic carriers:

[0084] Weigh out 10% butyl carbitol, 60% butyl carbitol acetate, 5% diethylene glycol dibutyl ether, 5% tripropylene glycol monomethyl ether, and 10% ethyl alcohol dodecyl alcohol by mass percentage and mix them evenly to obtain a mixed solvent. Then weigh out 7% ethyl cellulose and add it to the mixed solvent. Add 3% polyamide wax thixotropic agent, and then heat to 80°C while stirring. After the resin is completely dissolved, continue stirring for 60 minutes, and then cool to room temperature to obtain the organic carrier.

[0085] Step 2: Preparation of electrode paste:

[0086] Silver powder, glass material, and organic carrier were premixed and then added to the organic carrier and stirred for 2 hours. The stirred raw material was then rolled 6 times on a three-roll mill to further disperse and homogenize it. When the scraper fineness was less than 5 μm, it was filtered with a 400-mesh filter cloth to obtain the reference standard.

[0087] The products 1-5 prepared in Examples 1-5 and the control product prepared in the comparative example were subjected to relevant battery performance tests. The test results are shown in Table 1.

[0088] Table 1

[0089] In Table 1, Eta is the solar cell conversion efficiency, Voc is the open-circuit voltage, Isc is the short-circuit current, FF is the fill factor, Rs is the equivalent series resistance, and Rsh is the equivalent parallel resistance.

[0090] As can be seen from Table 1, compared with the control product prepared in the comparative example, the product prepared by the technical solution provided in this application has good battery-related parameters and can meet the actual practical needs.

[0091] The technical solution provided in this application, firstly, by adjusting the formulation of the glass powder, high-Tg glass can improve the wetting and adhesion of other components to silver powder particles. Simultaneously, ZrO2, WO3, and TiO2 in the glass powder exhibit good water and acid resistance, thereby further mitigating the reliability risks caused by reduced printing deposition weight due to lower silver content. During sintering, the glass powder softens and liquefies, promoting the sintering of silver powder while avoiding the generation of large volumes of gas that would make the structure porous, unlike organic additives. This solves the problem of excessive porosity caused by low silver content.

[0092] Secondly, using inorganic powder as an inorganic additive can replace the organic components and act as a site occupant. After drying and sintering, the inorganic additive will not volatilize like the organic carrier, thus avoiding excessive porosity.

[0093] In summary, this application provides a composition comprising: silver powder, glass powder, and an organic carrier; the glass powder comprises a first system glass powder and a second system glass powder, the first system glass powder being composed of a network forming body and a network modifying body, the network forming body being selected from any one or more metal oxides containing Te, Pb, Bi, Si, and Zn, and the network modifying body being an alkali metal oxide and / or an alkaline earth metal oxide; the second system glass powder containing any one or more of Ti, Zr, and W, and the glass transition temperature Tg of the second system glass powder being between 450℃ and 600℃. This application also provides a method for preparing the above composition, and further provides an application of the above composition or the product obtained by the above preparation method in battery slurry. In the technical solution provided by this application, the problem of excessive porosity caused by low silver content is improved by adjusting the formulation of the glass powder. Further experimental testing shows that the prepared composition has good electrical properties and good acid and water resistance. The composition, preparation method, and application in battery slurry provided by the embodiments of this application solve the technical defects in the prior art that make it difficult to balance the economic benefits of battery preparation and good battery performance.

[0094] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. Furthermore, other implementation methods can be derived from the above embodiments, allowing for structural and logical substitutions and changes without departing from the scope of this disclosure.

[0095] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A composition, characterized in that, The raw materials of the composition include: silver powder, glass powder, and organic carrier; The glass powder includes a first system glass powder and a second system glass powder. The first system glass powder is composed of a network forming body and a network modifying body. The network forming body is selected from any one or more metal oxides containing Te, Pb, Bi, Si and Zn, and the network modifying body is an alkali metal oxide and / or an alkaline earth metal oxide. The second system glass powder contains any one or more of Ti, Zr and W, and the glass transition temperature Tg of the second system glass powder is between 450℃ and 600℃.

2. The composition according to claim 1, characterized in that, By mass percentage, every 100% of glass powder includes 55% to 90% of first-system glass powder and 10% to 45% of second-system glass powder.

3. The composition according to claim 1 or 2, characterized in that, The raw materials for the composition also include: inorganic additives.

4. The composition according to claim 3, characterized in that, The raw materials of the composition, by weight, include: 65-85 parts silver powder, 3-15 parts glass powder, 11-25 parts organic carrier, and 0-10 parts inorganic additives.

5. The composition according to claim 3 or 4, characterized in that, The inorganic additive is a submicron-sized powder with a D50 of 50nm to 1000nm. The inorganic additive is selected from any one or more of alumina, titanium dioxide, silicon dioxide, silicon nitride, and zirconium oxide.

6. A method for preparing the composition according to any one of claims 1, 2, or 4, characterized in that, The preparation method is as follows: Step 1: Preparation of organic carrier: Butyl carbitol, butyl carbitol acetate, diethylene glycol dibutyl ether, tripropylene glycol monomethyl ether and alcohol ester dodecyl are mixed for the first time, then mixed with hydroxyethyl cellulose for the second time, and then polyamide wax is added for the third time under heating conditions to obtain organic carrier. Step 2: Preparation of slurry: After premixing silver powder and glass powder, they are mixed again with the organic carrier and stirred. The intermediate product after stirring is rolled to disperse and homogenize, and then filtered to obtain the product.

7. A method for preparing the composition according to any one of claims 3 to 5, characterized in that, The preparation method is as follows: Step 1: Preparation of organic carrier: Butyl carbitol, butyl carbitol acetate, diethylene glycol dibutyl ether, tripropylene glycol monomethyl ether and alcohol ester dodecyl are mixed for the first time, then mixed with hydroxyethyl cellulose for the second time, and then polyamide wax is added for the third time under heating conditions to obtain organic carrier. Step 2: Mixing inorganic additives: The organic carrier and inorganic additives are mixed for the fourth time to obtain an organic-inorganic mixed system; Step 3: Preparation of slurry: After premixing silver powder and glass powder, mix them again with the organic-inorganic mixed system and stir. Roll the stirred intermediate product to disperse and homogenize it, and then filter it to obtain the product.

8. The use of a product comprising the composition of any one of claims 1 to 5 or the preparation method of any one of claims 6 or 7 in a battery slurry.

Images