Positive electrode material and manufacturing method therefor, battery using positive electrode material and manufacturing method therefor, and electronic equipment using battery

A technology of cathode material and manufacturing method, applied in the field of electronic equipment, capable of solving problems such as insufficient energy density

Pending Publication Date: 2020-09-22
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these energy densities are not sufficient for further miniaturization of batteries, so it is desired to develop new cathode materials with higher energy densities than these materials

Method used

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  • Positive electrode material and manufacturing method therefor, battery using positive electrode material and manufacturing method therefor, and electronic equipment using battery
  • Positive electrode material and manufacturing method therefor, battery using positive electrode material and manufacturing method therefor, and electronic equipment using battery
  • Positive electrode material and manufacturing method therefor, battery using positive electrode material and manufacturing method therefor, and electronic equipment using battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0245]

[0246] Lithium carbonate (2.96g), cobalt oxalate dihydrate (7.32g) and diammonium hydrogen phosphate (10.56g) were placed in a planetary ball mill vessel. Then, the planetary ball mill container is placed on the ball mill device, and the ball mill device is driven to mix the raw materials. The resulting mixture was calcined at 600° C. for 12 hours under an argon atmosphere. The obtained calcined product was pulverized by a planetary ball mill to obtain amorphous Li 2 CoP 2 o 7 . It was further annealed at 500°C for 30 minutes under an argon atmosphere, thereby obtaining Li 2 CoP 2 o 7 .

[0247] The wavelength of the resulting cathode material The radiation light diffraction (X-ray diffraction) spectrum of Figure 5 (A). In the obtained spectrum, there are strong diffraction peaks at 2θ=13.1°, 14.0°, and 18.4°. Using this spectrum for Li 2 CoP 2 o 7 According to the analysis of the crystal structure, it can be seen that the crystal phase is monoclinic...

Embodiment 2

[0254] Lithium carbonate (3.55g), cobalt oxalate dihydrate (5.86g) and diammonium hydrogen phosphate (10.56g) were placed in a planetary ball mill vessel. Then, the planetary ball mill container is placed on the ball mill device, and the ball mill device is driven to mix the raw materials. The resulting mixture was calcined at 600° C. for 12 hours under an argon atmosphere. The obtained calcined product was pulverized by a planetary ball mill to obtain amorphous Li 2.4 co 0.8 P 2 o 7 . It was further annealed at 500°C for 30 minutes under an argon atmosphere, thereby obtaining Li 2.4 co 0.8 P 2 o 7 .

[0255] The wavelength of the obtained positive electrode material Radiation light diffraction (X-ray diffraction) measurement. As a result, it can be seen that the Figure 5 The same diffraction pattern in (A) is the same crystal lattice as that of the positive electrode material of Example 1.

Embodiment 3

[0257] Lithium carbonate (2.37g), cobalt oxalate dihydrate (8.78g) and diammonium hydrogen phosphate (10.56g) were placed in a planetary ball mill vessel. Then, the planetary ball mill container is placed on the ball mill device, and the ball mill device is driven to mix the raw materials. The resulting mixture was calcined at 600° C. for 12 hours under an argon atmosphere. The obtained calcined product was pulverized by a planetary ball mill to obtain amorphous Li 1.6 co 1.2 P 2 o 7 . It was further annealed at 500 °C for 30 min under an argon atmosphere, thereby obtaining Li with a crystal structure 1.6 co 1.2 P 2 o 7 .

[0258] The wavelength of the obtained positive electrode material Radiation light diffraction (X-ray diffraction) measurement. As a result, it can be seen that the Figure 5 The same diffraction pattern in (A) is the same crystal lattice as that of the positive electrode material of Example 1.

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Abstract

This positive electrode material has, in X-ray diffraction (2theta=5 degrees-90 degrees) that uses radiated light having a wavelength 1 angstrom, diffraction peaks located at 2theta=13.1 degrees+ / -0.2degrees, 14.0 degrees+ / -0.2 degrees, and 18.4 degrees + / -0.2 degrees, and has a monoclinic crystal structure belonging to a space group P2<1 / c>. The positive electrode material is represented by composition formula Li<2-2x>Co<1+x>P2O7 (-0.2<=x<=0.2).

Description

technical field [0001] The present invention relates to a positive electrode material and a manufacturing method thereof, a battery using the above positive electrode material, a manufacturing method thereof, and an electronic device using the above battery. Background technique [0002] Conventionally, secondary batteries have been widely used as storage batteries used in mobile phones, portable personal computers, sensor devices, electric vehicles, and the like. As a secondary battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lithium ion battery etc. are mentioned, for example. Among these, lithium-ion batteries are attracting attention because of their high energy density. [0003] In general, a battery has a positive electrode active material that undergoes an oxidation-reduction reaction at the positive electrode, and a negative electrode active material that undergoes an oxidation-reduction reaction at the negative electrode. In the case of a lithium io...

Claims

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Application Information

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IPC IPC(8): H01M4/58
CPCY02E60/10H01M2004/028H01M4/5825H01M4/58H01M10/0525
Inventor 栗田知周本间健司肥田胜春岩田纯一
Owner FUJITSU LTD
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