Electrode mixture paste for sodium secondary cell, positive electrode for sodium secondary cell, and sodium secondary cell

A sodium secondary battery and electrode technology, applied in the field of electrode composite material slurry, can solve problems such as difficulty in coating the current collector, reduced fluidity of electrode composite material slurry, etc., and achieve good adhesion and viscosity changes. Small, stable coating effect

Active Publication Date: 2016-11-09
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is gelled, the fluidity of the electrode compound slurry will be significantly reduced due to a change in viscosity, making it difficult to apply to the current collector.

Method used

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  • Electrode mixture paste for sodium secondary cell, positive electrode for sodium secondary cell, and sodium secondary cell
  • Electrode mixture paste for sodium secondary cell, positive electrode for sodium secondary cell, and sodium secondary cell
  • Electrode mixture paste for sodium secondary cell, positive electrode for sodium secondary cell, and sodium secondary cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0104] Hereinafter, the present invention will be described in more detail through examples. In addition, various evaluations of a composite metal oxide were performed by the following measurement.

[0105] 1. Powder X-ray Diffraction Determination of Composite Metal Oxide

[0106] The powder X-ray diffraction measurement of a composite metal oxide was performed using RINT2500TTR model manufactured by Rigaku Corporation. The measurement is performed by filling a special jig containing composite metal oxides, using a CuKα ray source, and performing the measurement at a diffraction angle 2θ=10 to 90° to obtain a powder X-ray diffraction pattern.

[0107] 2. Composition analysis of composite metal oxides

[0108] After dissolving the powder in hydrochloric acid, measurement was performed using an inductively coupled plasma emission analysis method (manufactured by SII, SPS3000, hereinafter may be referred to as ICP-AES.).

manufacture example 1

[0109] (electrode active material A 1 manufacturing)

[0110] In a beaker made of polypropylene, 44.88 g of potassium hydroxide was added to 300 ml of distilled water and dissolved by stirring to completely dissolve potassium hydroxide to prepare an aqueous potassium hydroxide solution (precipitating agent). Separately, in a separate polypropylene beaker, 21.21 g of iron (II) chloride tetrahydrate, 19.02 g of nickel (II) chloride hexahydrate, and manganese (II) chloride tetrahydrate were added to 300 ml of distilled water. 15.83 g was dissolved by stirring to obtain an aqueous solution containing iron-nickel-manganese. Stirring the above-mentioned precipitating agent, the above-mentioned aqueous solution containing iron-nickel-manganese was added dropwise thereto to obtain a slurry in which a precipitate was formed. Then, this slurry was filtered, washed with distilled water, and dried at 100° C. to obtain a precipitate. The precipitate, sodium carbonate, and calcium hydro...

Embodiment 1

[0114] (electrode compound slurry P 1 manufacturing)

[0115] Electrode material paste P 1 In the manufacture of, use the A of manufacturing example 1 as electrode active material 1 , using acetylene black (HS100, manufactured by Denkai Kogyo Co., Ltd.) as the conductive material, PVdF#7305 solution (PVdF:NMP=5:95, manufactured by KUREHA Corporation) as the binder, and an acid with an arity of 2 or more NMP solution using K 1 . follow A 1 : HS100: PVdF = 90: 5: 5 (weight ratio) method of weighing. to which according to A 1 : Oxalic acid = 100: 0.5 (weight ratio) way to add K 1 , using a bead mill disperser (trade name: Dispermat, manufactured by VMA-GETZMANN) to stir and mix, thus obtaining electrode composite slurry P 1 . The spin conditions were 3000 rpm for 10 minutes.

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Abstract

Provided is an electrode mixture paste for a sodium secondary cell containing a positive electrode active material that can be doped and dedoped using sodium ions, an electroconductive material, a binder, an organic solvent, and an acid having a valence of two or above, wherein the temporal change in viscosity is low even in the absence of a special facility.

Description

technical field [0001] The invention relates to an electrode compound slurry for a sodium secondary battery, a positive electrode for a sodium secondary battery and a sodium secondary battery. Background technique [0002] Electrode composite materials are used for electrodes in nonaqueous electrolyte secondary batteries and the like, and sodium secondary batteries are being studied as nonaqueous electrolyte secondary batteries. The sodium-containing compound constituting the sodium secondary battery is an abundant and inexpensive material, so it is expected to be able to supply a large amount of large-scale power sources by putting it into practical use. [0003] A sodium secondary battery usually has at least a pair of electrodes, a positive electrode and a negative electrode, the positive electrode contains a sodium-containing compound capable of doping and dedoping sodium ions as a positive electrode active material, and the negative electrode contains a compound capable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/13H01M10/054
CPCH01M4/0404H01M4/13H01M4/139H01M4/62H01M10/054Y02E60/10H01M4/364H01M2004/028
Inventor 田中秀央山口泷太郎
Owner SUMITOMO CHEM CO LTD
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