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Positive electrode active material for secondary battery and magnesium secondary battery using the same

A positive electrode active material, magnesium secondary battery technology, applied in the direction of active material electrodes, secondary batteries, battery electrodes, etc., can solve the problems of slow diffusion speed and easy trapping, achieve high cycle retention rate, and increase battery capacity , the effect of high energy density

Inactive Publication Date: 2012-07-04
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, compared with lithium, there are problems such as slow diffusion rate and easy trapping in the positive electrode active material.

Method used

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  • Positive electrode active material for secondary battery and magnesium secondary battery using the same
  • Positive electrode active material for secondary battery and magnesium secondary battery using the same
  • Positive electrode active material for secondary battery and magnesium secondary battery using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0108] (Production of Oxide Glass)

[0109] Table 1 shows the glass composition produced and examined.

[0110] All of the components are represented by mass % (mass percentage) in terms of oxides. The raw materials of each component are vanadium pentoxide, phosphorus pentoxide, iron oxide, manganese dioxide, silver oxide, cuprous oxide, cobalt oxide, nickel oxide, tungsten oxide and boron oxide. For lithium, sodium, and potassium, lithium carbonate, sodium carbonate, and potassium carbonate were used. For fluorine, chlorine, iodine, and sulfur contained in the glass, lithium fluoride, silver chloride, copper iodide, and lithium sulfide were used.

[0111] The oxide glass was produced in the following procedure.

[0112] Put 300 g of the mixed powder obtained by blending and mixing the raw material compounds so as to have the composition shown in Table 1 into a platinum crucible, and heat it to the temperature shown in Table 1 at a heating rate of 5 to 10°C / min (°C / min) usi...

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Abstract

The invention provides a positive electrode active material for a secondary battery and a magnesium secondary battery using the same. Specifically, the invention provides a positive electrode active material for the magnesium secondary battery having high charge-discharge cycle retention rate and high capacity, and a magnesium secondary battery using the same. The positive electrode active material for a secondary battery contains a powder particle containing a crystal phase having a structure formed with aggregation of a plurality of crystallites (101) and amorphous phases (103a, 103b) formed between the crystallites (101) themselves. The amorphous phases (103a, 103b) contain at least one kind of a metal oxide selected from a vanadium oxide, an iron oxide, a manganese oxide, a nickel oxide and a cobalt oxide; and the crystal phase and the amorphous phases (103a, 103b) use the positive electrode active material enabling to store and release magnesium ions.

Description

technical field [0001] The present invention relates to a positive electrode active material for secondary batteries and a magnesium secondary battery using the positive electrode active material. Background technique [0002] With the downsizing of personal computers, video cameras, and mobile phones, lithium secondary batteries have been put into practical use and widely used as power sources for information-related equipment and communication equipment in the fields of information-related equipment and communication equipment. The lithium secondary battery usually consists of using LiCoO in the positive electrode active material 2 It consists of a positive electrode such as a lithium transition metal oxide, a negative electrode using metal lithium, carbon materials, etc. as a negative electrode active material, and an electrolyte solution in which a lithium salt is used as a supporting electrolyte and dissolved in an organic solvent. Lithium detached from the positive el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M10/054
CPCH01M4/5825H01M4/525C01G31/00C01P2006/40C01P2004/03H01M4/485H01M4/54Y02E60/122H01M4/62H01M2004/028H01M10/054H01M4/131C01G49/00H01M10/4235C01G31/02H01M2004/021H01M4/136Y02E60/10H01M4/48H01M10/05
Inventor 青柳拓也内藤孝藤枝正泽井裕一西村胜宪米元雅浩
Owner HITACHI LTD
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