Positive electrode plate with dry electrode slurry material applied without relying on substrate manufacturing

Abstract

To provide a positive electrode plate with dry electrode slurry material attachment that does not depend on substrate manufacturing. [Solution] The dry electrode slurry material includes a positive electrode substrate (21) and a positive 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 positive electrode particles (15), PEO that has thermoplastic properties and melts at high temperatures, PVDF or PVDF-HFP that, when heated to a certain temperature, causes the PEO in the dry electrode slurry material to melt and the entire dry electrode slurry material to become viscous, and is attached to the positive electrode substrate to form a positive electrode plate, a plurality of conductive additives (13), a lithium salt (19), and a plurality of ceramic particles (100) for guiding lithium ions.

Description

[Technical Field]

[0001] The present invention relates to an electrode plate, and more particularly to a positive electrode plate that is dry-applied with an electrode slurry material, independent of substrate manufacturing. [Background technology]

[0002] In the prior art, a solvent is added during the manufacturing process of the positive electrode slurry to ensure that the materials in the positive electrode slurry are dispersed uniformly. The positive electrode slurry containing the solvent is then applied to a positive electrode substrate and baked to remove the solvent. When the solvent evaporates, it fills the pores in the positive electrode slurry layer, so roller compaction is required to tightly bond the positive electrode slurry layer to the positive 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 cathode 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 cathode plate that uses dry electrode slurry material application without relying on substrate manufacturing. By using thermoplastic PEO (Poly(ethylene oxide)), the cathode slurry is applied to the cathode substrate, eliminating the need for solvent-containing cathode slurry. This eliminates the subsequent baking and roller compaction steps, eliminating 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 positive electrode plate that can be applied with a dry electrode slurry material without relying on the manufacturing process of the substrate. [Means for solving the problem]

[0006] In order to achieve the above object, one aspect of the present invention is a positive electrode plate with a dry electrode slurry material attached that does not depend on the manufacturing of a substrate. The dry electrode slurry material is a material that is independent of the positive electrode substrate and can be carried separately. In application, the dry electrode slurry material is melted at high temperature and bonded to the positive electrode substrate to form the positive electrode plate. A general solid or semi-solid battery has a positive electrode, and the positive electrode is: a positive electrode substrate that is a substrate for placing a positive electrode material; a positive electrode slurry layer applied to the positive electrode substrate to form a positive electrode plate, the positive electrode slurry layer being made of the dry electrode slurry material, the dry electrode slurry material being in a solid state at room temperature; The dry electrode slurry material is a plurality of positive electrode particles, which are active materials used to store or release lithium ions; PEO that has thermoplasticity and becomes molten at high temperatures, and has ion guiding ability, and is therefore used to guide lithium ions in order to enhance the lithium ion guiding ability of the entire positive electrode; PVDF or PVDF-HFP, wherein the PVDF and the PEO are polymer materials, and when the dry electrode slurry material is heated to a certain temperature, the PEO and the PVDF-HFP / PVDF copolymer in the dry electrode slurry material become molten, the entire dry electrode slurry material becomes viscous, and the PVDF or PVDF-HFP is attached to the positive electrode substrate, and the entire dry electrode slurry material forms the positive electrode plate; 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 ceramic particles having high ionic conductivity for lithium ions and therefore used to guide lithium ions, the plurality of ceramic particles being dispersed to guide the lithium ions so as to prevent the lithium ions from abnormally accumulating in the dry electrode slurry material and causing a side reaction with the dry electrode slurry material; the positive electrode particles, the 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 independently portable, so that the dry electrode slurry material and the electrode plate can be produced separately and independently. When manufacturing an electrode plate, the dry electrode slurry material is melted at a high temperature and bonded to the positive electrode substrate to form the positive electrode plate. Due to the materials constituting the dry electrode slurry material, baking and roller compaction processes are not required during the bonding process, and the dry electrode slurry material is directly attached to the positive 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 cathode slurry can be applied to the cathode substrate, eliminating the need for baking and roller compaction, which are required with conventional cathode 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 positive electrode plate for which a dry electrode slurry material is applied without relying on substrate manufacturing according to an embodiment of the present invention; [Figure 2] 1 is a cross-sectional view of a composite ceramic particle according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be described below with reference to the accompanying drawings, in which: FIG. 1 is a block diagram of a conventional optical fiber cable; FIG. 2 is a block diagram of a conventional optical fiber cable;

[0011] 1 is a schematic diagram showing a cathode plate for which a dry electrode slurry material is applied without relying on substrate manufacturing according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a composite ceramic particle according to an embodiment of the present invention.

[0012] A typical solid or semi-solid battery comprises a positive electrode 20, which includes the following components:

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

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

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

[0016] The positive electrode particles 15 are used to store or release lithium ions. The positive electrode particles 15 are selected from lithium cobalt oxide (LCO) particles, single-crystal or polycrystalline nickel-cobalt-manganese (NCM) particles, and manganese-iron-lithium phosphate (LMFP) or lithium iron phosphate (LFP). Preferably, the single-crystal nickel-cobalt-manganese particles are selected from NCM811 or NCMN9. The positive electrode particles 15 are an active material, and account for 88 wt% to 97 wt% of the total dry electrode slurry material 22.

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

[0018] PVDF (Polyvinylidene Fluoride) or PVDF-HFP (Poly(vinylidene fluoride-co-hexafluoropropylene)) is a polymer material 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 positive electrode substrate 21. This replaces the solvent added to the conventional positive electrode slurry, eliminating the subsequent baking and roller compaction steps, reducing manufacturing costs and preventing the material of the positive electrode slurry layer 23 from being destroyed by roller compaction. Electrode plates formed in this manner also have a long shelf life.

[0020] The polymer material 17 further includes one of PVA (Polyvinyl alcohol) or HDPE (High Density Polyethylene).

[0021] The PVA and PEO are compatible, 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 positive electrode substrate 21. The HDPE has high toughness, which can enhance the toughness of the positive electrode plate.

[0022] Since the PEO has thermoplasticity and can be melted to a molten state at high temperatures, the thermoplasticity of PEO can be utilized to apply the molten dry electrode slurry material 22 to the positive electrode substrate 21, eliminating the need for separate baking and roller compaction steps for the conventional positive electrode slurry containing a solvent. This method reduces the number of steps that require baking and prevents material damage that can be induced 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 dry electrode slurry material 22 also includes a lithium salt 19 .

[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) or Py14-TFSI (N-methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl)imide). The PDDA-TFSI or Py14-TFSI can slide molecular chains within the polymer material 17, thereby enhancing ion conductivity.

[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 is used to prevent the LiTFSI from being corroded by water, thereby preventing the deterioration of the overall battery performance due to attack by HF (hydrofluoric acid) generated by the reaction between water and LiTFSI. In addition, the lithium salt 19 can withstand a high voltage difference, making the polymer material 17 relatively stable even under the high pressure of the positive electrode 20. The addition of the LiBOB improves the overall stability.

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

[0030] As shown in FIG. 1 , the positive electrode particles 15, the ceramic particles 100, the conductive additive 13, and the lithium salt 19 are dispersed among the polymer material 17 to support the entire dry electrode slurry material 22.

[0031] The weight ratio of the positive electrode particles 15, the polymer material 17 and the lithium salt 19, and the conductive additive 13 and the ceramic particles 100 is in the range of 88-97:10-2:2-1, i.e., the ratio of the positive electrode particles, the polymer material and the lithium salt, and the conductive additive and the ceramic particles is A:B:C. A is in the range of 88-97, B is in the range of 10-2, 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 , the outer surface of each ceramic particle 100 may be further coated with a composite layer 110, which includes a dopamine layer 120 that coats the outer surface of the ceramic particle 100. The dopamine layer 120 and the corresponding ceramic particle 100 form secondary composite particles 140. The dopamine layer 120 is composed of polydopamine molecules. A PVDF layer 130 coats the outer surface of the secondary composite particles 140, and the PVDF layer 130 and the corresponding secondary composite particles 140 form composite conductive additive particles 150. The PVDF layer 130 is composed of a PVDF material. The PVDF material of the PVDF layer is formed during the production of the composite conductive additive particles 150, and is not formed by reacting with PVDF or PVDF-HFP in the dry electrode slurry material 22. Since the dopamine layer 120 incompletely covers the outer surface of the ceramic particle 100, a portion of the surface of the ceramic particle 100 is exposed, and the PVDF layer 130 partially contacts the surface of the ceramic particle 100 and partially contacts the dopamine layer 120.

[0033] A portion of the fluorine ions in the PVDF material of the PVDF layer 130 form ionic bonds with the lithium ions on the surface of the corresponding ceramic particles 100 to form lithium fluoride. Another portion of the fluorine ions in the PVDF material of the PVDF layer 130 form hydrogen bonds with the nitrogen ions of the polydopamine molecules on the surface of the secondary composite particles 140, and the PVDF material forms the PVDF layer 130 that covers the outer surfaces of the secondary composite particles 140.

[0034] The ceramic particles 100 have a lithium ion conducting ability (ionic conductivity of 10 -5 cm 2 The oxides having the lithium ion conducting ability are, for example, lithium aluminum germanium phosphate (LAGP) and lithium aluminum titanium phosphate (LATP) having a NASICON (sodium (Na) super ionic conductor) structure. The oxides having the lithium ion conducting ability are, for example, lithium lanthanum zirconium oxide (Li7La3Zr2O 12 The 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 100 are at least one selected from the above-mentioned materials.

[0035] When the ceramic particles 100 are made of an LLZO material, 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).

[0036] 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 N is Zr 4+ (zirconium ion), Si 4+ (silicon ion), Sn 4+(tin ion) and other tetravalent cations.

[0037] In actual use, the dry electrode slurry material 22 has a material structure that is in a solid state at room temperature. When the dry electrode slurry material 22 is heated to a certain temperature (the temperature is in the range of 50°C to 240°C), the PEO, the lithium salt, and the copolymer formed of PVDF-HFP or PVDF in the dry electrode slurry material 22 become molten, and the entire dry electrode slurry material 22 becomes viscous and adheres to the positive electrode substrate 21, thereby forming the positive electrode plate as a whole.

[0038] In the prior art, a conventional positive electrode slurry is applied to the positive electrode substrate 21. Because the conventional positive electrode slurry contains a solvent, the application of the conventional positive electrode slurry to the positive electrode substrate 21 requires subsequent baking and roller compaction processes to form a positive electrode slurry layer that adheres to the positive electrode substrate 21. This method involves two additional technical processes, resulting in high costs. The dry electrode slurry material 22 adheres to the positive electrode substrate 21 by utilizing the PEO's ability to melt at high temperatures, eliminating the need to add a solvent to bond it to the positive electrode substrate 21. Therefore, applying the dry electrode slurry material 22 to the positive electrode substrate 21 eliminates the need for baking and roller compaction processes, thereby reducing manufacturing costs. Furthermore, because the dry electrode slurry material 22 has a solid material structure, the manufacturing of the positive electrode plate is not limited to the simultaneous manufacturing of the conventional positive electrode slurry and the positive electrode substrate 21. The dry electrode slurry material 22 according to the present invention is easy to obtain and can be stored at room temperature, making the manufacturing of the positive electrode plate more flexible. The independently portable dry electrode slurry material made from the above-mentioned materials allows the manufacturing of the dry electrode slurry material and the manufacturing of the electrode plate to be carried out separately and independently.

[0039] In the dry electrode slurry material 22, the plurality of positive electrode particles 15 are primarily 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 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 the lithium ions pass through the positive electrode 20, they are guided by the dispersed plurality of ceramic particles 100, which disperses the lithium ion paths, preventing abnormal accumulation of lithium ions 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 lithium ion conductivity. This increases the overall lithium ion density, and when there is a potential difference 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 order to increase the overall lithium ion efficiency, in addition to improving the lithium ion conduction rate, electron conductivity is also very important. Therefore, the conductive additive 13 is added to the dry electrode slurry material 22, and the electron-conducting ability of the conductive additive 13 is improved.

[0040] 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]

[0041] 13 Conductive additives 15 Positive electrode particles 17 Polymer Materials 19 Lithium salts 20 positive electrode 21 Positive substrate 22 Dry electrode slurry material 23 Positive electrode slurry layer 100 ceramic particles 110 Composite layer 120 Dopamine Layer 130 PVDF layers 140 Secondary composite particles 150 Composite conductive additive particles

Claims

1. A positive electrode plate is made of a dry electrode slurry material that does not depend on the substrate manufacturing process, and the dry electrode slurry material is a material that is independent of the positive electrode substrate and can be carried separately. In application, the dry electrode slurry material is melted at high temperature and bonded to the positive electrode substrate to form the positive electrode plate. A general solid or semi-solid battery has a positive electrode, and the positive electrode is: a positive electrode substrate that is a substrate for placing a positive electrode material; a positive electrode slurry layer applied to the positive electrode substrate to form a positive electrode plate, the positive electrode slurry layer being made of the dry electrode slurry material, the dry electrode slurry material being in a solid state at room temperature; The dry electrode slurry material is a plurality of positive electrode particles, which are active materials used to store or release lithium ions; PEO that has thermoplasticity and becomes molten at high temperatures, and has ion guiding ability, and is therefore used to guide lithium ions in order to enhance the lithium ion guiding ability of the entire positive electrode; PVDF or PVDF-HFP, wherein the PVDF and the PEO are polymer materials, and when the dry electrode slurry material is heated to a certain temperature, the PEO and the PVDF-HFP / PVDF copolymer in the dry electrode slurry material become molten, the entire dry electrode slurry material becomes viscous, and the PVDF or PVDF-HFP is attached to the positive electrode substrate, and the entire dry electrode slurry material forms the positive electrode plate; 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 ceramic particles having high ionic conductivity for lithium ions and therefore used to guide lithium ions, the plurality of ceramic particles being dispersed to guide the lithium ions so as to prevent the lithium ions from abnormally accumulating in the dry electrode slurry material and causing a side reaction with the dry electrode slurry material; the positive electrode particles, the 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 independently portable, so that the dry electrode slurry material and the electrode plate can be produced separately and independently. When manufacturing an electrode plate, the dry electrode slurry material is melted at a high temperature and bonded to the positive electrode substrate to form the positive electrode plate, and due to the materials constituting the dry electrode slurry material, baking and roller compaction processes are not required in the bonding process, and the dry electrode slurry material is directly attached to the positive electrode substrate, making this a positive electrode plate that is not dependent on substrate manufacturing.

2. the outer surface of each of the ceramic particles is further coated with a composite layer, the composite layer comprising a dopamine layer coating the outer surface of the ceramic particle, the dopamine layer and the corresponding ceramic particle forming a secondary composite particle, the dopamine layer being composed of polydopamine molecules, a PVDF layer coating the outer surface of the secondary composite particle, the PVDF layer and the corresponding secondary composite particle forming a composite conductive additive particle, the PVDF layer being composed of a PVDF material, the dopamine layer incompletely coating the outer surface of the ceramic particle, thereby partially exposing the surface of the ceramic particle, and the PVDF layer being partially in contact with the surface of the ceramic particle and partially in contact with the dopamine layer; 2. A positive electrode plate according to claim 1, characterized in that some fluorine ions in the PVDF material of the PVDF layer form ionic bonds with lithium ions on the surface of corresponding ceramic particles to form lithium fluoride, and other fluorine ions in the PVDF material of the PVDF layer form hydrogen bonds with nitrogen ions of the polydopamine molecules on the surface of the secondary composite particles, thereby forming the PVDF layer that covers the outer surfaces of the secondary composite particles.

3. The positive electrode plate according to claim 1 or 2, characterized in that the ceramic particles are oxides having lithium ion conductivity, or oxides or sulfides having a garnet structure or a perovskite structure.

4. 4. The positive electrode plate according to claim 3, 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.

5. When the ceramic particles are composed of LAGP, the LAGP contains Li １＋ｘ Al ｘ Ge ２－ｘ (P.O. ４ ) ３ 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 ) ３ , 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 positive 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.

6. 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＋ 6. The positive electrode plate according to claim 5, wherein the electrode slurry material is applied by a dry method independent of substrate manufacturing.

7. 4. A positive electrode plate for which a dry electrode slurry material is applied without depending on substrate manufacturing, as described in claim 3, characterized in that the oxide having a garnet structure is selected from lithium lanthanum zirconium oxide, and the oxide having a perovskite structure is selected from lithium lanthanum titanium oxide.

8. 2. The positive electrode plate according to claim 1, wherein when the ceramic particles are made of an LLZO material, the LLZO material is at least one selected from the group consisting of LLZO, Ga-LLZO, Cu-LLZO, Ta-LLZO, Sr-LLZO, and Al-LLZO.

9. The positive electrode plate according to claim 3, wherein the sulfide is selected from LPSC.

10. 2. The positive electrode plate according to claim 1, wherein the positive electrode particles are selected from the group consisting of lithium cobalt oxide particles, single-crystal or polycrystalline nickel-cobalt-manganese particles, and manganese-iron-lithium phosphate or iron-lithium phosphate.

11. The positive electrode plate according to claim 1, characterized in that the weight ratio of the plurality of positive electrode particles, "the polymer material and the lithium salt", and "the conductive additive and the plurality of ceramic particles" is in the range of 88-97:10-2:2-1.

12. 2. The positive electrode plate of claim 1, wherein the polymer material further comprises one of PVA and HDPE.

13. 2. The positive electrode plate 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.

14. 2. The positive electrode plate of claim 1, wherein the lithium salt is one selected from the group consisting of PDDA-TFSI and Py14-TFSI.

15. The lithium salt is LiBOB, Li ３ P.O. ４ , LiFSI, LiTFSI, and LiPF ６ The positive electrode plate according to claim 14, further comprising at least one of the following:

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