Negative plates made with dry negative electrode slurry material containing NASICON ceramic particles, independent of substrate manufacturing

Abstract

We provide a negative electrode plate that is applied with a dry negative electrode slurry material containing NASICON ceramic particles, which is independent of substrate manufacturing. [Solution] The dry electrode slurry material includes a negative electrode substrate (21) and a negative electrode slurry layer (23) that is composed of a dry electrode slurry material (22), the dry electrode slurry material being a solid material structure at room temperature. The dry electrode slurry material also includes a plurality of negative electrode particles (15), PEO that has thermoplastic properties and melts at high temperatures, CMC that melts the PEO in the dry electrode slurry material when heated to a certain temperature, the entire dry electrode slurry material becoming viscous, and is attached to the negative electrode substrate to form a negative electrode plate, a plurality of conductive additives (13), a lithium salt (19), and a plurality of composite ceramic particles (100) for guiding lithium ions.

Description

[Technical Field]

[0001] The present invention relates to a negative electrode plate, and more particularly to a negative electrode plate that is applied with a dry negative electrode slurry material containing NASICON ceramic particles that does not depend on the substrate manufacturing process. [Background technology]

[0002] In the prior art, a solvent is added during the manufacturing process of the negative electrode slurry to ensure that the materials in the negative electrode slurry are dispersed uniformly. The negative electrode slurry containing the solvent is then applied to a negative electrode substrate and baked to remove the solvent. When the solvent evaporates, it fills the pores in the negative electrode slurry layer, so roller compaction is required to tightly bond the negative electrode slurry layer to the negative electrode substrate. Summary of the Invention [Problem to be solved by the invention]

[0003] However, this method requires two additional steps—baking and roller compaction—which increase manufacturing costs. Furthermore, the roller compaction process can destroy the material in the negative electrode slurry layer, reducing overall battery performance. Currently, battery materials are gradually shifting from liquid to solid or semi-solid batteries. Based on years of experience in the battery materials field, the inventors have proposed a novel negative electrode plate using a dry-type negative electrode slurry material containing NASICON ceramic particles, which does not rely on substrate manufacturing. The thermoplastic PEO (Poly(ethylene oxide)) coating of the negative electrode slurry onto the negative electrode substrate eliminates the need for solvent-containing negative electrode slurry, eliminating the subsequent baking and roller compaction steps. This eliminates two steps in the process, further reducing overall costs and improving the performance of the battery material.

[0004] Therefore, the inventors of the present invention believed that the above drawbacks could be improved, and after extensive research, they came up with the present invention, which effectively improves the above issues through rational design.

[0005] The present invention has been made in view of the above-mentioned problems of the prior art, and its main object is to provide a negative electrode plate that is applied with a dry negative electrode slurry material containing NASICON ceramic particles, independent of the substrate manufacturing process. [Means for solving the problem]

[0006] In order to achieve the above object, one aspect of the present invention provides a negative electrode plate with a dry negative electrode slurry material containing NASICON ceramic particles, which is independent of the substrate manufacturing process, and the dry electrode slurry material is a material that can be carried independently from the negative electrode substrate. In application, the dry electrode slurry material is melted at a high temperature and bonded to the negative electrode substrate to form a negative electrode slurry layer, The dry electrode slurry material is a plurality of negative electrode particles, which are active materials used to store or release lithium ions; PEO having thermoplasticity and being in a molten state at high temperatures, said PEO having ion guiding ability and therefore usable for guiding lithium ions; CMC, wherein the PEO and the CMC are polymeric materials; When the dry electrode slurry material is heated to a certain temperature, the copolymer of the PEO and the CMC in the dry electrode slurry material becomes molten, and the entire dry electrode slurry material becomes viscous and is attached to the negative electrode substrate, forming the negative electrode plate as a whole. a plurality of conductive additives for enhancing the electronic conductivity of the dry electrode slurry material; a lithium salt for sliding molecular chains within the polymer material to enhance ion-conducting capability; and a plurality of composite ceramic particles used to guide lithium ions, the plurality of ceramic particles having high ionic conductivity for lithium ions, thereby preventing lithium ions from abnormally accumulating in the dry electrode slurry material and causing a side reaction with the dry electrode slurry material. The plurality of negative electrode particles, the plurality of composite ceramic particles, the conductive additive, and the lithium salt are dispersed among the polymer material to support the entire dry electrode slurry material. The dry electrode slurry material formed from the above-mentioned materials is independent and portable, allowing the dry electrode slurry material and the electrode plate to be manufactured separately and independently. When manufacturing an electrode plate, the dry electrode slurry material is melted at high temperature and bonded to the negative electrode substrate to form the negative electrode plate. The materials constituting the dry electrode slurry material eliminate the need for baking and roller compaction processes during the bonding process, and the dry electrode slurry material is directly attached to the negative electrode substrate. [Effects of the Invention]

[0007] The present invention is configured as described above and therefore has the following advantages. The PEO of the present invention has thermoplastic properties and melts at high temperatures. By utilizing the thermoplastic properties of PEO, the molten negative electrode slurry can be applied to the negative electrode substrate, eliminating the need for baking and roller compaction, which are required with conventional negative electrode slurries containing solvents. This method not only reduces the baking step, but also prevents material damage caused by roller compaction. Furthermore, the electrode plate formed in this manner has a longer shelf life.

[0008] At least the following points will become clear from the description and drawings to be described later. [Brief explanation of the drawings]

[0009] [Figure 1]1 is a schematic diagram illustrating a dry negative electrode slurry material containing NASICON ceramic particles that is independent of substrate manufacturing according to an embodiment of the present invention; FIG. [Figure 2] 1 is a cross-sectional view of a composite ceramic particle according to an embodiment of the present invention. [Figure 3] 1 is a cross-sectional view of a composite ceramic particle coated with a zinc oxide layer according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be described below through embodiments of the invention, but the following embodiments do not limit the invention according to the claims, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0011] Fig. 1 is a schematic diagram of a dry negative electrode slurry material containing NASICON ceramic particles independent of substrate manufacturing according to an embodiment of the present invention. Fig. 2 is a cross-sectional view of a composite ceramic particle according to an embodiment of the present invention. Fig. 3 is a cross-sectional view of a composite ceramic particle coated with a zinc oxide layer according to an embodiment of the present invention.

[0012] A typical solid-state or semi-solid-state battery includes an anode 20, which includes the following components:

[0013] The negative electrode substrate 21 is a substrate for placing the material of the negative electrode 20. The negative electrode substrate 21 is an aluminum foil substrate.

[0014] A negative electrode slurry layer 23 is applied to the negative electrode substrate 21, and the whole forms a negative electrode plate. In the present invention, the negative electrode slurry layer 23 is composed of the dry electrode slurry material 22, which is a separate, portable material independent of the negative electrode substrate 21. In application, the dry electrode slurry material 22 is melted at high temperature and bonded to the negative electrode substrate 21 to form the negative electrode plate.

[0015] The dry electrode slurry material 22 further includes the following components.

[0016] The negative electrode particles 15 are used to store or release lithium ions, and the negative electrode active particles 45 are made of a carbon material (the carbon material is at least one selected from graphite, hard carbon, soft carbon, etc.), a silicon-carbon composite material (Si - C), and silicon-oxygen-carbon composites (SiOx - At least one type is selected from the group consisting of the above-mentioned negative electrode particles 15, which are active materials, and the ratio of the negative electrode particles 15 to the total dry electrode slurry material 22 is in the range of 90 wt % to 95 wt %.

[0017] PEO (Poly(ethylene oxide)) has thermoplastic properties and melts at high temperatures. PEO also has ion guiding ability, so it can be used to guide lithium ions.

[0018] The PEO and CMC (carboxymethyl cellulose) are polymer materials 17 .

[0019] Due to the thermoplasticity of the PEO, the dry electrode slurry material 22 becomes molten at high temperatures, similar to a liquid, and is then adhered to the negative electrode substrate 21. This replaces the solvent added to the conventional negative electrode slurry, eliminates the subsequent baking and roller compaction steps, reduces manufacturing costs, and prevents the material of the negative electrode slurry layer 23 from being destroyed by roller compaction. Electrode plates formed in this manner have a long shelf life.

[0020] The polymer material 17 further includes PVA (Polyvinyl alcohol) or SBR (Styrene-Butadiene Rubber).

[0021] The PVA and PEO are compatible with each other, reducing the possibility of crystallization of the materials in the dry electrode slurry material 22 and enhancing the bonding strength between the dry electrode slurry material 22 and the negative electrode substrate 21. The SBR has high toughness and can improve the toughness of the negative electrode plate.

[0022] Since PEO has thermoplasticity and melts into a molten state at high temperatures, applying the molten negative slurry to the negative substrate by utilizing the thermoplasticity of PEO eliminates the need for separate baking and roller compaction steps required for conventional negative electrode slurries containing solvents. This method reduces the baking step and prevents material damage caused by roller compaction.

[0023] The plurality of conductive additives 13 are at least one selected from the group consisting of carbon nanotubes, nanoscale amorphous carbon, and graphene. The nanoscale amorphous carbon is, for example, super P. The conductive additives 13 are used to enhance the electronic conductivity of the dry electrode slurry material 22.

[0024] The plurality of conductive additives 13 further contain sinapinic acid as a dispersant, which has a polarity that allows it to bond with oxides in the dry electrode slurry material 22 and adjusts the alkalinity of PVDF to prevent material breakdown in the dry electrode slurry material 22. The proportion of sinapinic acid in the conductive additives 13 is in the range of 0.05 wt% to 0.3 wt%.

[0025] The lithium salt 19 is used to enhance the electrochemical properties.

[0026] The lithium salt 19 is one selected from PDDA-TFSI (poly(diallyl dimethyl ammonium)-bis(trifluoromethanesulfonyl)imide) and Py14-TFSI (N-methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl)imide). The PDDA-TFSI or Py14-TFSI slides the molecular chain within the polymer material 17 to enhance ion conduction ability.

[0027] The lithium salt 19 may further include at least one of LiBOB (lithium bis(oxalato)borate), Li3PO4 (lithium phosphate), LiFSI (lithium bis(fluorosulfonyl)imide), LiTFSI (LiN(CF3SO2)2, lithium bis(trifluoromethanesulfonyl)imide), and LiPF6 (lithium hexafluorophosphate).

[0028] The LiTFSI is used to increase the conductivity of lithium ions, and the LiBOB prevents the LiTFSI from being corroded by water and from being attacked by HF (hydrofluoric acid) produced by the reaction of water and LiTFSI, which would reduce overall battery performance. Furthermore, the lithium salt 19 can withstand a high voltage difference, making the polymer material 17 relatively stable even under the high pressure of the anode 20. Adding the LiBOB improves overall stability.

[0029] The plurality of composite ceramic particles 100 are used to guide lithium ions, and the plurality of composite ceramic particles 100 have high ionic conductivity for lithium ions. Therefore, when lithium ions pass through the negative electrode 20, they are guided by the dispersed plurality of composite ceramic particles 100, which disperses the lithium ion paths, thereby preventing an abnormal accumulation of lithium ions in the dry electrode slurry material 22 and the occurrence of a side reaction with the dry electrode slurry material 22.

[0030] The plurality of negative electrode particles 15, the plurality of composite ceramic particles 100, the conductive additive 13, and the lithium salt 19 are dispersed among the polymer material 17 so as to support the entire dry electrode slurry material 22.

[0031] The weight ratio of the plurality of negative electrode particles 15, "the polymer material 17 and the lithium salt 19," and "the conductive additive 13 and the plurality of composite ceramic particles 100" is in the range of 90-95:8-4:2-1. That is, the ratio of the plurality of negative electrode particles, "the polymer material and the lithium salt," and "the conductive additive and the plurality of ceramic particles" is A:B:C. A is in the range of 90-95, B is in the range of 8-4, and C is in the range of 2-1, and A, B, and C are all acceptable within these ratio ranges in the present invention. In this specification, numerical values ​​used in the same manner all have the same definition.

[0032] As shown in Fig. 2, each composite ceramic particle 100 includes a ceramic particle 105, the outer surface of which is coated with a hydroxide ion layer 110, and the entire particle forms a secondary particle 120. A dopamine layer 130 coats the exterior of the secondary particle 120, thereby forming the composite ceramic particle 100. The hydroxide ion layer 110 is formed by adding tris(hydroxymethyl)amine during the process of manufacturing the composite ceramic particle 100. The tris(hydroxymethyl)amine has three OH groups. - and two of the OH groups of the tris(hydroxymethyl)amine are - The bond bonds with the oxide functional groups on the surface of the ceramic particle 105 itself. - The bonds are extended toward the outer surface of the ceramic particle 105, forming the hydroxide ion layer 110. A copolymerization reaction occurs between dopamine to form the dopamine layer 130. The OH groups of the dopamine itself are -The bond is formed by the third OH - A dehydration polymerization reaction occurs with the bond, allowing the dopamine to bind to the secondary particles 120, and the whole to form the composite ceramic particle 100. The dopamine is hydrophobic, which can further protect the ceramic particles 105 from wetting.

[0033] The particle size of the ceramic particles 105 ranges between 50 nm and 200 nm, the thickness of the hydroxide ion layer 110 ranges between 0.5 nm and 2 nm, and the thickness of the dopamine layer 130 ranges between 1 nm and 10 nm.

[0034] 3, the exterior of the dopamine layer 130 corresponding to the plurality of composite ceramic particles 100 may be further coated with a zinc oxide layer 140. Since the zinc oxide in the zinc oxide layer 140 has hydrophobicity, the zinc oxide layer 140 can further prevent the ceramic particles 105 from being eroded by water and can increase the hardness of the ceramic particles 105 as a whole.

[0035] The ceramic particles 105 have a lithium ion conducting ability (ionic conductivity of 10 -5 cm 2 The oxide is at least one of an oxide having a diffusion coefficient of more than 1 / s, an oxide having a garnet structure, or an oxide or sulfide having a perovskite structure.

[0036] The oxide having lithium ion conductivity is, for example, lithium aluminum germanium phosphate (LAGP) having a NASICON (sodium (Na) super ionic conductor) structure, and the oxide having a garnet structure is, for example, lithium lanthanum zirconium oxide (Li7La3Zr2O 12The oxide having a perovskite structure is, for example, lithium lanthanum zirconium oxide (LLZO), the sulfide is, for example, LPSC (LPSC, sulfide solid electrolyte), and the ceramic particles 105 are at least one selected from the above-mentioned materials.

[0037] When the ceramic particles 105 are made of LLZO, the LLZO material is formed by selecting at least one from the group consisting of LLZO, Ga-LLZO (Ga-doped LLZO, gallium-doped lithium-lanthanum-zirconium oxide), Cu-LLZO (Cu-doped LLZO, copper-doped lithium-lanthanum-zirconium oxide), Ta-LLZO (Ta-doped LLZO, tantalum-doped lithium-lanthanum-zirconium oxide), Sr-LLZO (Sr-doped LLZO, strontium-doped lithium-lanthanum-zirconium oxide), and Al-LLZO (Al-doped LLZO, aluminum-doped lithium-lanthanum-zirconium oxide).

[0038] When the ceramic particles are composed of LAGP, the LAGP is Li 1+x Al x Ge 2-x( PO4)3 or Li 1+x+y Al x Ge 2-x-y-z M y N z (PO4)3. When the ceramic particles are composed of LATP, the LATP is selected from Li 1+x Al x Ti 2-x (PO4)3, or Li 1+x+y Al x Ti 2-x-y-z M y N z(PO4)3, where x is in the range of 0.1 to 0.8, y is in the range of 0 to 0.2, and z is in the range of 0 to 0.2. M is Sc 3+ (Scandium ion), Y 3+ (yttrium ion), Ga 3+ (Gallium ion), In 3+ (indium ion), La 3+ (Lanthanum ion) and other trivalent cations, N, Zr 4+ (zirconium ion), Si 4+ (silicon ion), Sn 4+ (tin ion) and other tetravalent cations.

[0039] In actual use, the dry electrode slurry material 22 is a material structure that is in a solid form at room temperature. When heated to a certain temperature (the temperature is in the range of 50°C to 240°C), the PEO, the lithium salt, and the CMC copolymer in the dry electrode slurry material melt, and the entire dry electrode slurry material becomes viscous and can be attached to the negative electrode substrate 21, forming the negative electrode plate.

[0040] In the prior art, a conventional negative electrode slurry is applied to the negative electrode substrate 21. Because the conventional negative electrode slurry contains a solvent (water), the application of the conventional negative electrode slurry to the negative electrode substrate 21 requires subsequent baking and roller compaction processes to form a negative electrode slurry layer that adheres to the negative electrode substrate 21. This method increases costs due to the additional two technological processes. The dry electrode slurry material utilizes the PEO's ability to melt at high temperatures to adhere to the negative electrode substrate, eliminating the need to add a solvent to bond it to the negative electrode substrate. Therefore, applying the dry electrode slurry material to the negative electrode substrate eliminates the need for baking and roller compaction processes, thereby reducing manufacturing costs. Furthermore, because the dry electrode slurry material has a solid material structure, the negative electrode plate is manufactured without the conventional limitation of simultaneously manufacturing the negative electrode slurry and the negative electrode substrate 21. The dry electrode slurry material according to the present invention is easy to obtain and can be stored at room temperature, making the manufacturing of the negative electrode plate more flexible. The independent and portable dry electrode slurry material made from the above materials allows the manufacturing of the dry electrode slurry material and the manufacturing of the electrode plate to be carried out separately and independently.

[0041] In the dry electrode slurry material 22, the plurality of negative electrode particles 15 are mainly used as active particles for storing or releasing lithium ions. The polymer material 17 serves to disperse and support the materials in the dry electrode slurry material 22. The plurality of composite ceramic particles 100 are added to the dry electrode slurry material 22 to rapidly conduct the lithium ions in the dry electrode slurry material 22 and improve battery conduction efficiency. When lithium ions pass through the negative electrode 20, they are guided by the dispersed plurality of composite ceramic particles 100, which disperses the lithium ion paths, preventing the lithium ions from abnormally accumulating in the dry electrode slurry material 22 and causing side reactions with the dry electrode slurry material 22. Because the polymer material 17 has very low lithium ion conductivity, the lithium salt 19 is added to the polymer material 17 to increase the overall lithium ion density. When a potential difference exists between the two ends of the dry electrode slurry material 22, the lithium ions move in and out at high speed, thereby improving the lithium ion conduction rate. In addition to improving the lithium ion conduction rate, electron conductivity is also very important for improving the overall lithium ion efficiency. Therefore, the conductive additive 13, such as carbon nanotubes or nanoscale amorphous carbon, is added to the dry electrode slurry material 22 to improve the electron conduction rate.

[0042] Although the embodiment of the present invention has been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design modifications and the like are also included within the scope of the present invention without departing from the gist of the present invention. [Explanation of symbols]

[0043] 13 Conductive additives 15 Negative electrode particles 17 Polymer Materials 19 Lithium salts 20 negative electrode 21 Negative substrate 22 Dry electrode slurry material 23 Negative electrode slurry layer 100 Composite Ceramic Particles 105 ceramic particles 110 Hydroxide ion layer 120 Secondary particles 130 Dopamine Layer 140 zinc oxide layer

Claims

1. a negative electrode plate having a dry negative electrode slurry material containing NASICON ceramic particles that is not dependent on the substrate manufacturing, the dry electrode slurry material being a separately portable material independent of the negative electrode substrate, and in application, the dry electrode slurry material being melted at a high temperature and bonded to the negative electrode substrate to form a negative electrode slurry layer; The dry electrode slurry material is a plurality of negative electrode particles, which are active materials used to store or release lithium ions; PEO having thermoplasticity and being in a molten state at high temperatures, said PEO having ion guiding ability and therefore usable for guiding lithium ions; CMC, wherein the PEO and the CMC are polymeric materials; When the dry electrode slurry material is heated to a certain temperature, the copolymer of the PEO and the CMC in the dry electrode slurry material becomes molten, and the entire dry electrode slurry material becomes viscous and is attached to the negative electrode substrate, forming the negative electrode plate as a whole. a plurality of conductive additives for enhancing the electronic conductivity of the dry electrode slurry material; a lithium salt for sliding molecular chains within the polymer material to enhance ion-conducting capability; a plurality of composite ceramic particles used to guide lithium ions, the plurality of ceramic particles having high ionic conductivity for lithium ions, and thus being guided by the dispersed plurality of ceramic particles, preventing a situation in which lithium ions abnormally accumulate in the dry electrode slurry material and a side reaction occurs with the dry electrode slurry material; the plurality of negative electrode particles, the plurality of composite ceramic particles, the conductive additive, and the lithium salt are dispersed among the polymer material so as to support the entire dry electrode slurry material; The dry electrode slurry material is formed from the above-mentioned material and is an independent and portable material, so that the production of the dry electrode slurry material and the production of the electrode plate can be carried out separately and independently; When manufacturing an electrode plate, the dry electrode slurry material is melted at a high temperature and bonded to the negative electrode substrate to form the negative electrode plate, and the materials constituting the dry electrode slurry material eliminate the need for baking and roller compaction processes in the bonding process, and the dry electrode slurry material is directly attached to the negative electrode substrate, making this a negative electrode plate that is not dependent on substrate manufacturing.

2. Each of the composite ceramic particles is Ceramic particles; a hydroxide ion layer that covers the outer surfaces of the ceramic particles and forms secondary particles as a whole; 2. The negative electrode plate according to claim 1, further comprising a dopamine layer that coats the exterior of the secondary particles and forms the composite ceramic particles.

3. The hydroxide ion layer is formed by adding tris(hydroxymethyl)amine in the manufacturing process of the composite ceramic particles, and the tris(hydroxymethyl)amine has three OH groups. － The tris(hydroxymethyl)amine has two OH-bonds, which are used to bond with the oxidized functional groups on the surface of the ceramic particle itself, and the third OH of the tris(hydroxymethyl)amine is used to bond with the oxidized functional groups on the surface of the ceramic particle itself. － The bonds are extended toward the outer surface of the ceramic particle to form the hydroxide ion layer, and a copolymerization reaction occurs between the dopamine and the OH of the dopamine itself. － The bond is formed by the third OH － The negative electrode plate according to claim 2, characterized in that a dehydration polymerization reaction occurs with the bond, causing the dopamine to bond with the secondary particles, thereby forming the composite ceramic particles as a whole, and the dopamine has hydrophobic properties, which further protects the ceramic particles from wetting.

4. The negative electrode plate of claim 2, wherein the exterior of the dopamine layer corresponding to a plurality of the composite ceramic particles may be further coated with a zinc oxide layer, and the zinc oxide in the zinc oxide layer has hydrophobic properties, and the zinc oxide layer further prevents the ceramic particles from being eroded by water and increases the overall hardness of the ceramic particles.

5. 3. The negative electrode plate according to claim 1, wherein the ceramic particles are oxides having lithium ion conductivity, or oxides or sulfides having a garnet or perovskite structure.

6. 6. The negative electrode plate according to claim 5, wherein the oxide having lithium ion conductivity is selected from the group consisting of germanium aluminum lithium phosphate and titanium aluminum lithium phosphate having a NASICON structure.

7. When the ceramic particles are composed of LAGP, the LAGP contains Li １＋ｘ Al ｘ Ge ２－ｘ (P.O. ４ ) or Li １＋ｘ＋ｙ Al ｘ Ge ２－ｘ－ｙ－ｚ M ｙ N ｚ (P.O. ４ ) ３ is selected from When the ceramic particles are composed of LATP, the LATP contains Li １＋ｘ Al ｘ Ti ２－ｘ (P.O. ４ ), or Li １＋ｘ＋ｙ Al ｘ Ti ２－ｘ－ｙ－ｚ M ｙ N ｚ (P.O. ４ ) ３ is selected from 2. The negative electrode plate of claim 1, wherein x is in the range of 0.1 to 0.8, y is in the range of 0 to 0.2, z is in the range of 0 to 0.2, M is a trivalent cation, and N is a tetravalent cation.

8. The trivalent cation is Sc ３＋ , Y ３＋ , Ga ３＋ , In ３＋ , La ３＋ and the tetravalent cation is selected from Zr ４＋ , Si ４＋ , Sn ４＋ 8. The negative electrode plate according to claim 7, wherein the negative electrode plate is selected from the group consisting of:

9. 6. The dry electrode slurry material of claim 5, wherein the sulfide is selected from LPSC.

10. The negative electrode plate with the dry electrode slurry material applied thereto according to claim 1, characterized in that the negative electrode active particles are at least one selected from the group consisting of carbon materials, silicon-carbon composite materials, and silicon-oxygen-carbon composite materials, and the carbon material is at least one selected from the group consisting of graphite, hard carbon, and soft carbon.

11. 2. The dry electrode slurry material of claim 1, wherein the polymer material further comprises PVA or SBR.

12. 2. The negative electrode plate according to claim 1, wherein the dry electrode slurry material further contains sinapic acid as a dispersant.

13. 2. The dry electrode slurry material according to claim 1, wherein a weight ratio of the plurality of negative electrode particles, the polymer material and the lithium salt, and the conductive additive and the plurality of composite ceramic particles is in the range of 90-95:8-4:2-1.

14. The dry electrode slurry material according to claim 1 , wherein the plurality of conductive additives are at least one selected from the group consisting of carbon nanotubes, nanoscale amorphous carbon, and graphene.

15. 2. The dry electrode slurry material according to claim 1, wherein the lithium salt is one selected from the group consisting of PDDA-TFSI and Py14-TFSI.

16. 16. The negative electrode plate of claim 15, wherein the lithium salt further comprises at least one of LiBOB, Li3PO4, LiFSI, LiTFSI, and LiPF6.

Images