阅读说明：本技术 车辆用锂离子电池及其制造方法 (Lithium ion battery for vehicle and method for manufacturing same ) 是由 林栽敏 成柱咏 张容准 金种宪 金千中 金炫奭 于 2018-11-30 设计创作，主要内容包括：本发明涉及车辆用锂离子电池及其制造方法。所述电池包括基板；正电极辅助层,设置于所述基板上并包括铂、金、钯、银或其组合中的至少一种；正电极,设置于所述正电极辅助层上并包括选自LiNi<Sub>0.5</Sub>Mn<Sub>1.5</Sub>O<Sub>4</Sub>,LiCoPO<Sub>4</Sub>,LiMnPO<Sub>4</Sub>或其组合中的至少一种的活性材料；电解质层,设置于所述正电极上；和负电极,设置于所述电解质层上。(A lithium ion battery for a vehicle includes a substrate, a positive electrode auxiliary layer disposed on the substrate and including at least of platinum, gold, palladium, silver, or a combination thereof, and a positive electrode disposed on the positive electrode auxiliary layer and including LiNi 0.5 Mn 1.5 O 4 ，LiCoPO 4 ，LiMnPO 4 Or a combination thereof, at least active materials, an electrolyte layer disposed on the positive electrodeOn the electrode; and a negative electrode disposed on the electrolyte layer.)

1, A lithium ion battery for a vehicle, comprising:

a substrate;

a positive electrode auxiliary layer disposed on the substrate, the positive electrode auxiliary layer comprising at least of platinum, gold, palladium, silver, or a combination thereof;

a positive electrode disposed on the positive electrode auxiliary layer, the positive electrode comprising a material selected from LiNi_0.5Mn_1.5O₄，LiCoPO₄，LiMnPO₄At least active materials, or a combination thereof;

an electrolyte layer disposed on the positive electrode; and

a negative electrode disposed on the electrolyte layer.

2. The lithium ion battery for a vehicle according to claim 1, wherein a thickness of the positive electrode auxiliary layer is smaller than a thickness of the positive electrode.

3. The lithium ion battery for vehicles according to claim 1, wherein the thickness of the positive electrode auxiliary layer is 100nm to 500 nm.

4. The lithium ion battery for a vehicle of claim 1, wherein the battery further comprises:

an adhesive layer disposed between the substrate and the positive electrode auxiliary layer.

5. The lithium ion battery for a vehicle of claim 4, wherein the adhesion layer comprises at least of Ti, Al, Cu, or a combination thereof.

6. The lithium ion battery for vehicles according to claim 1, wherein the positive electrode is active at a voltage of 4.0V to 10.0V.

7. The lithium ion battery for a vehicle of claim 1, wherein the substrate comprises stainless steel.

8. The lithium ion battery for a vehicle according to claim 1, wherein the positive electrode auxiliary layer is configured to suppress diffusion of iron contained in the substrate to the positive electrode.

9, A method for manufacturing a lithium ion battery for a vehicle, comprising:

providing a substrate;

providing a positive electrode auxiliary layer comprising at least of platinum, gold, palladium, silver, or a combination thereof on the substrate;

providing a positive electrode on the positive electrode auxiliary layer;

providing an electrolyte layer on the positive electrode; and

a negative electrode is provided on the electrolyte layer.

10. The method of claim 9, wherein providing the positive electrode auxiliary layer comprises depositing at least of platinum, gold, palladium, silver, or a combination thereof on the substrate.

11. The method of claim 9, wherein providing the positive electrode comprises sputteringFrom LiNi_0.5Mn_1.5O₄、LiCoPO₄、LiMnPO₄Or at least active materials in combination thereof.

12. The method of claim 9, wherein the thickness of the positive electrode auxiliary layer is less than the thickness of the positive electrode.

13. The method of claim 9, wherein the thickness of the positive electrode auxiliary layer is from 100nm to 500 nm.

14. The method of claim 9, wherein the method further includes:

an adhesive layer is provided between the substrate and the positive electrode auxiliary layer.

15. The method of claim 9, wherein the substrate comprises stainless steel.

Technical Field

The present invention relates to a lithium ion battery for a vehicle and a method of manufacturing the same, and more particularly, to a lithium ion battery for a vehicle and a method of manufacturing the same, which are suitable for use as a vehicle energy source due to high power.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

Lithium ion batteries have attracted considerable attention as the next generation of vehicle energy sources in order to use lithium ion batteries as a vehicle energy source, it is necessary to develop lithium ion batteries with high power.

Chemical of Material, 201628 (8), pp 2634-. When the positive electrode is composed of LiNi disclosed in the above-mentioned document_0.5Mn_1.5O₄When the powder is prepared, there is a problem that the battery capacity cannot be provided. In order to provide battery capacity, LiNi must be added_0.5Mn_1.5O₄The surface of the powder is coated or used with a coating having a size of 2.0X 10^-2An electrolyte having a high ionic conductivity of S/cm or more. This case also provides a low capacity of about 80mAh/g @1 cycles.

Disclosure of Invention

aspects of the present disclosure are to provide a lithium ion battery for a vehicle that includes a positive electrode for high voltage applications.

Another aspect of the present disclosure is to provide a method for manufacturing a lithium ion battery for a vehicle including a positive electrode for high voltage applications.

In aspects, the present disclosure provides a lithium ion battery for a vehicle comprising a substrate, a positive electrode auxiliary layer disposed on the substrate and comprising or more of platinum, gold, palladium, silver, and combinations thereof, a positive electrode auxiliary layer disposed on the positive electrode auxiliary layer and comprising a material selected from the group consisting of LiNi_0.5Mn_1.5O₄，LiCoPO₄，LiMnPO₄And combinations thereof, an electrolyte layer disposed on the positive electrode, and a negative electrode (negative electrode) disposed on the electrolyte layer.

The thickness of the positive electrode auxiliary layer may be less than the thickness of the positive electrode.

The thickness of the positive electrode auxiliary layer may be 100nm to 500 nm.

The lithium ion battery for a vehicle may further include a bonding layer (adhesive layer) disposed between the substrate and the positive electrode auxiliary layer.

The adhesion layer may include or more of Ti, Al, Cu, and combinations thereof.

The positive electrode may be active at a voltage of 4.0V to 10.0V.

The substrate may comprise stainless steel.

The positive electrode auxiliary layer may suppress diffusion of iron contained in the substrate to the positive electrode.

In another aspect, the present disclosure provides a method for making a lithium ion battery for a vehicle, comprising providing a substrate, providing a positive electrode auxiliary layer comprising or more of platinum, gold, palladium, silver, and combinations thereof on the substrate, providing a positive electrode on the positive electrode auxiliary layer, providing an electrolyte layer on the positive electrode, and providing a negative electrode on the electrolyte layer.

The providing a positive electrode auxiliary layer may include depositing one or more of platinum, gold, palladium, silver, and combinations thereof on the substrate.

The providing the positive electrode may include sputtering selected from the group consisting of LiNi_0.5Mn_1.5O₄，LiCoPO₄，LiMnPO₄And combinations thereof.

The thickness of the positive electrode auxiliary layer may be less than the thickness of the positive electrode.

When the positive electrode auxiliary layer is provided, the thickness of the positive electrode auxiliary layer may be 100nm to 500 nm.

The method can further include step including providing an adhesive layer between the substrate and the positive electrode auxiliary layer.

In the providing the substrate, the substrate may comprise stainless steel.

Other aspects and preferred forms of the disclosure will be discussed below.

Further areas of applicability of will become apparent from the description provided herein, it being understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.

Drawings

In order that the disclosure may be well understood, various forms thereof will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1A is a schematic cross-sectional view illustrating versions of a lithium ion battery for a vehicle of the present invention.

Fig. 1B is a schematic cross-sectional view of versions of a lithium ion battery for a vehicle illustrating the invention.

Fig. 2 is a schematic flowchart illustrating a method of manufacturing types of lithium ion batteries for vehicles according to the present invention.

Fig. 3A is a current potential curve of the lithium ion battery according to example 1 measured by cyclic voltammetry (cyclic voltammetry);

fig. 3B is a current potential curve of the lithium ion battery according to comparative example 1 measured by cyclic voltammetry;

fig. 4A shows the charge and discharge test results of the lithium ion battery according to example 1.

Fig. 4B shows the charge and discharge test results of the lithium ion battery according to comparative example 1.

FIG. 5A shows the result of depth profile analysis (XPS) using X-ray photoelectron spectroscopy (XPS) of a lithium ion battery according to example 1; and

fig. 5B shows the result of depth profile analysis using X-ray photoelectron spectroscopy (XPS) of the lithium ion battery according to comparative example 1.

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.

Detailed Description

The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

It should be understood that although the terms "," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms, but rather are used to distinguish elements from another elements.

It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, forms of the lithium ion battery for a vehicle of the present disclosure will be described below.

Fig. 1A is a schematic cross-sectional view illustrating versions of a lithium ion battery for a vehicle of the present disclosure.

Referring to fig. 1A, the lithium ion battery 10 for vehicles of the forms of the present disclosure may be used as a vehicle energy source, the vehicle may be a device for transporting objects, people, etc., the vehicle may be, for example, a land vehicle, a marine vessel, or an aircraft, examples of the land vehicle may include automobiles, including passenger cars, vans, trucks, trailers and sports cars (sports cars), bicycles, motorcycles, trains, etc.

The versions of the lithium ion battery 10 for a vehicle of the present disclosure undergo an electrochemical reaction by charge/discharge, lithium splits into lithium ions and electrons at the positive electrode 300 upon charge, the lithium ions migrate to the negative electrode 500 via the electrolyte layer 400, the electrons are able to migrate, for example, through an external circuit to the negative electrode 500, at the negative electrode 500, oxygen molecules, lithium ions, and electrons react to generate electrical and thermal energy, upon discharge, lithium ions are expelled from the negative electrode 500 and migrate through the electrolyte layer 400 to the positive electrode 300, the electrons migrate, for example, through an external circuit to the positive electrode 300.

The versions of the lithium ion battery 10 for a vehicle of the present disclosure include a substrate 100, a positive electrode auxiliary layer 200, a positive electrode 300, an electrolyte layer 400, and a negative electrode 500.

The substrate 100 can protect the positive electrode 300, the electrolyte layer 400 and the negative electrode 500 from external impacts.

In addition to the function of the protective electrode, the substrate 100 also serves as a current collector to transfer electrons generated during the electrochemical reaction to an external load.

The substrate 100 may, for example, comprise stainless steel.

Fig. 1B is a schematic cross-sectional view illustrating versions of a lithium ion battery for a vehicle of the present disclosure.

Referring to fig. 1B, a lithium ion battery of some forms of of the present disclosure further includes an adhesive layer interposed between the substrate and the positive electrode auxiliary layer, the adhesive layer preventing the substrate and the positive electrode auxiliary layer from becoming spaced apart from each other, the adhesive layer including, for example, or more of Ti, Al, Cu, and combinations thereof.

Referring to fig. 1A and 1B, the positive electrode auxiliary layer 200 is capable of inhibiting diffusion of iron contained in the substrate 100 into the positive electrode 300. the positive electrode auxiliary layer 200 is disposed on the substrate 100. the positive electrode auxiliary layer 200 includes or more of platinum, gold, palladium, silver, and combinations thereof.

The thickness t1 of the positive electrode auxiliary layer 200 may be less than the thickness t2 of the positive electrode 300. When the thickness t1 of the positive electrode auxiliary layer 200 is greater than or equal to the thickness t2 of the positive electrode 300, it may be difficult to suppress diffusion of iron into the positive electrode 300.

The thickness t1 of the positive electrode auxiliary layer 200 may be 100 to 500 nanometers (nm). When the thickness t1 of the positive electrode auxiliary layer 200 is less than 100nm, the diffusion of iron contained in the substrate 100 into the positive electrode 300 cannot be sufficiently suppressed, whereas when the thickness t1 of the positive electrode auxiliary layer 200 is higher than 500nm, a reduction in the weight of the battery is not possible.

The positive electrode 300 is disposed on the positive electrode auxiliary layer 200. The positive electrode 300 comprises a material selected from the group consisting of LiNi_0.5Mn_1.5O₄、LiCoPO₄、LiMnPO₄And combinations thereof. The positive electrode 300 may be a positive electrode for high voltage applications. The positive electrodes are usually provided for low voltage (less than 4.5V)The versions of the lithium ion battery 10 for vehicles of the present disclosure are used for high voltage applications, and, for example, the positive electrode 300 can be activated (activated reaction) at a voltage of 4.5 to 10.0V.

The electrolyte layer 400 is disposed on the positive electrode 300. The electrolyte layer 400 includes, for example, LiPF₆. The electrolyte layer 400 includes, for example, an electrolyte such as Ethylene Carbonate (EC), diethyl carbonate (DEC) or Polycarbonate (PC), and LiPF₆。

The negative electrode 500 is disposed on the electrolyte layer 400. The negative electrode 500 includes, for example, lithium.

The method for manufacturing versions of a lithium ion battery for a vehicle of the present disclosure includes providing the positive electrode auxiliary layer to prevent diffusion of ions from the substrate to the positive electrode.

The following detailed disclosure will focus on differences from the previously described lithium ion battery for a vehicle of the forms of the present disclosure, and omit the description whose contents relate to the lithium ion battery for a vehicle of the forms of the present disclosure.

Fig. 2 is a schematic flow chart diagram illustrating a method for manufacturing versions of a lithium ion battery for a vehicle of the present disclosure.

Referring to fig. 1A, 1B and 2, a method for manufacturing an version of a lithium ion battery 10 for a vehicle of the present disclosure includes providing a substrate 100(S100), providing a positive electrode auxiliary layer 200 on the substrate 100 using or more of platinum, gold, palladium, silver and combinations thereof (S200), providing a positive electrode 300 on the positive electrode auxiliary layer 200 (S300), providing an electrolyte layer 400 on the positive electrode 300 (S400), and providing a negative electrode 500 on the electrolyte layer 400 (S500).

In the providing of the substrate 100(S100), the substrate 100 may include stainless steel.

The method for manufacturing a version of a lithium ion battery 10 for a vehicle of the present disclosure may further further include providing an adhesive layer 600 between the substrate 100 and the positive electrode auxiliary layer 200, the adhesive layer interposed between the substrate and the positive electrode auxiliary layer, the adhesive layer preventing the substrate and the positive electrode auxiliary layer from being separated from each other, the adhesive layer including, for example, of Ti, Al, Cu, and combinations thereof.

The positive electrode auxiliary layer 200 is disposed on the substrate 100 (S200) the disposition of the positive electrode auxiliary layer 200(S200) can be performed by depositing or more of platinum, gold, palladium, silver and combinations thereof on the substrate 100, preferably, the positive electrode auxiliary layer 200 can be formed by depositing platinum on the substrate 100, and thus, diffusion of ions from the substrate 100 to the positive electrode 300 is suppressed.

When the positive electrode auxiliary layer 200 is provided (S200), the thickness t1 of the positive electrode auxiliary layer 200 may be less than the thickness t2 of the positive electrode 300. When the thickness t1 of the positive electrode auxiliary layer 200 is greater than or equal to the thickness t2 of the positive electrode 300, it may be difficult to suppress diffusion of iron into the positive electrode 300.

When the positive electrode auxiliary layer 200 is provided (S200), the thickness t1 of the positive electrode auxiliary layer 200 may be 100 to 500 nanometers (nm). When the thickness t1 of the positive electrode auxiliary layer 200 is less than 100nm, diffusion of iron contained in the substrate 100 into the positive electrode 300 cannot be sufficiently suppressed, and when the thickness t1 of the positive electrode auxiliary layer 200 is higher than 500nm, reduction in the weight of the battery becomes impossible.

The positive electrode 300 is disposed on the positive electrode auxiliary layer 200 (S300). Providing the positive electrode 300(S300) may be selected from the group consisting of LiNi by sputtering_0.5Mn_1.5O₄、LiCoPO₄、LiMnPO₄And combinations thereof.

The electrolyte layer 400 is disposed on the positive electrode 300 (S400). The electrolyte layer 400 includes, for example, LiPF₆. The electricityThe electrolyte layer 400 includes, for example, an electrolyte such as Ethylene Carbonate (EC), diethyl carbonate (DEC), or Polycarbonate (PC), and LiPF₆。

The negative electrode 500 is formed on the electrolyte layer 400 (S500). The negative electrode 500 includes, for example, lithium.

The method for manufacturing versions of a lithium ion battery for a vehicle of the present disclosure includes providing the positive electrode auxiliary layer to prevent diffusion of ions from the substrate to the positive electrode.

Hereinafter, the present disclosure will be described in more detail with reference to specific embodiments. However, the examples are provided only to illustrate the present disclosure and should not be construed as limiting the scope of the present disclosure.