阅读说明：本技术 电极材料、使用了其的电极层以及蓄电设备及电极材料的制造方法 (Electrode material, electrode layer using same, electricity storage device, and method for producing electrode material ) 是由 佐佐木亮人 佐佐木敦也 福士大辅 平林英明 片冈好则 于 2019-02-22 设计创作，主要内容包括：电极材料包含具有氧缺损及沿着b轴的六方孔道结构的氧化钨粉末。另外,氧化钨粉末以WO<Sub>3-x</Sub>表示,优选满足0.1≤x≤0.3。另外,X射线衍射光谱中的峰强度比I<Sub>(010)</Sub>/I<Sub>(103)</Sub>优选为1以上且10以下。(The electrode material comprises a tungsten oxide powder having oxygen vacancies and a hexagonal pore structure along the b-axis. Further, the tungsten oxide powder is mixed with WO 3‑x It means that 0.1. ltoreq. x.ltoreq.0.3 is preferably satisfied. In addition, the peak intensity ratio I in the X-ray diffraction spectrum (010) /I (103) Preferably 1 or more and 10 or less.)

1. An electrode material comprising a tungsten oxide powder having oxygen vacancies and a hexagonal pore structure along the b-axis.

2. The electrode material according to claim 1, wherein the tungsten oxide powder is coated with WO_3-xIt is expressed that x is 0.1. ltoreq. x.ltoreq.0.3.

3. The electrode material according to claim 1 or claim 2, wherein a peak intensity I attributed to a (010) plane in an X-ray diffraction spectrum₍₀₁₀₎Intensity of peak assigned to (103) plane I₍₁₀₃₎1 st peak intensity ratio I₍₀₁₀₎/I₍₁₀₃₎Is 1 to 10 inclusive.

4. The electrode material according to claim 1 or 2, wherein a peak intensity I attributed to a (010) plane in an X-ray diffraction spectrum₍₀₁₀₎Intensity of peak assigned to (103) plane I₍₁₀₃₎1 st peak intensity ratio I₍₀₁₀₎/I₍₁₀₃₎Is 3 or more and 10 or less.

5. The electrode material according to any one of claims 1 to 4, wherein the tungsten oxide powder has a true density of 6.0g/cm³The above.

6. An electrode layer comprising the electrode material according to any one of claims 1 to 5.

7. The electrode layer according to claim 6, wherein a peak intensity I attributed to a (010) plane in an X-ray diffraction spectrum with respect to the electrode layer₍₀₁₀₎Intensity of peak assigned to (103) plane I₍₁₀₃₎Intensity ratio of No. 2 peak of (1)₍₀₁₀₎/I₍₁₀₃₎Is 0.1 to 3 inclusive.

8. The electrode layer according to claim 6 or claim 7, wherein the electrode material is contained in an amount of 50 wt% or more and 100 wt% or less.

9. An electric storage device comprising the electrode layer according to any one of claims 6 to 8.

10. A method of manufacturing an electrode material, comprising: the peak intensity I assigned to the (010) plane in the X-ray diffraction spectrum₍₀₁₀₎Intensity of peak assigned to (103) plane I₍₁₀₃₎1 st peak intensity ratio I₍₀₁₀₎/I₍₁₀₃₎Pulverizing tungsten oxide powder of 1-10 to obtain 2 nd peak intensity ratio I of 0.1-3₍₀₁₀₎/I₍₁₀₃₎。

11. The method for producing an electrode material according to claim 10, wherein the tungsten oxide powder is represented by WO_3-xIt is expressed that x is 0.1. ltoreq. x.ltoreq.0.3.

12. The method for producing an electrode material according to claim 10 or claim 11, wherein at least 1 selected from the group consisting of a metal oxide powder other than tungsten oxide, a carbon powder, and a binder is mixed with the tungsten oxide powder when the tungsten oxide powder is pulverized.

Technical Field

Background

As a part of the effective use of electricity, development of chargeable and dischargeable devices has been advanced. As chargeable and dischargeable devices, various devices such as secondary batteries, capacitors, and electric double layer capacitors have been developed.

As parameters representing the performance of a chargeable and dischargeable device, there are a power density (W/kg) and an energy density (Wh/kg). The power density is a parameter indicating the speed of supplying electricity. The higher the power density, the more excellent the instantaneous explosive power. The energy density is a parameter indicating the capacity. The higher the energy density, the higher the capacity of the device.

Generally, the power density of the secondary battery is 10W/kg to 4000W/kg, and the energy density is 10^-2Wh/kg-200 Wh/kg. The power density of the capacitor is 10⁴W/kg～10⁵W/kg, energy density 10^-3Wh/kg～10^-2Wh/kg. The power density of the electric double layer capacitor was 10³W/kg～10⁴W/kg, the energy density is 1 Wh/kg-10 Wh/kg.

Secondary batteries, capacitors (capacitors) have properties that are specified as either power density or energy density.

In recent years, it has been required to effectively use stored electricity. For example, in the case of an electric vehicle, the vehicle may be started rapidly. In order to cope with a sudden start, it is necessary to quickly supply the electric energy required for starting the engine. The secondary battery is not suitable for instantaneous power supply because of its low power density. In addition, the capacitance or the capacitor is insufficient because the energy density is low. Such a conventional chargeable and dischargeable device is not a device that has both power density and energy density.

International publication No. 2016/039157 (patent document 1) discloses an electrode material containing tungsten oxide to which a skip-conducting property is imparted by providing an oxygen deficiency. Further, international publication No. 2014/142066 (patent document 2) discloses an electrode material containing tungsten oxide having hexagonal crystal.

Disclosure of Invention

Problems to be solved by the invention

The tungsten oxide electrode materials of patent documents 1 and 2 have reduced internal resistance, improved initial capacity, and improved cycle maintenance rate. However, the improvement of the cycle maintenance rate is limited.

Drawings

Fig. 1 is a diagram showing an example of an electrode material according to an embodiment.

Fig. 2 is a diagram showing another example of the electrode material according to the embodiment.

Fig. 3 is a diagram showing an electrode material of patent document 2.

Fig. 4 is a conceptual diagram illustrating the configuration of the power storage device.

Embodiments relate to an electrode material, an electrode layer and an electric storage device using the same, and a method for manufacturing the electrode material.