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Sodium rechargeable battery

A sodium secondary battery and electrolyte technology, which is applied in the direction of secondary batteries, battery electrodes, battery components, etc., can solve problems such as increased demand and concerns about raw material supply, and achieve reduced usage, high discharge capacity retention, and Excellent circulation effect

Inactive Publication Date: 2010-12-29
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a lithium secondary battery, the composite metal oxide constituting the positive electrode contains a large amount of rare metal elements such as lithium, and the supply of these raw materials is worrying in response to the increased demand for large-scale power supplies.

Method used

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Examples

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Effect test

manufacture example 1

[0077] Sodium carbonate (Na 2 CO 3 : Manufactured by Wako Pure Chemical Industries, Ltd.: 99.8% purity), manganese (IV) oxide (MnO 2 : Manufactured by High Purity Chemical Research Institute Co., Ltd.: 99.9% purity) and tricobalt tetroxide (Co 3 O 4 : produced by Justsam Chemical Industry Co., Ltd.: purity: 99%), weighed with a molar ratio of Na: Mn: Co of 0.7: 0.5: 0.5, and mixed for 4 hours with a dry ball mill to obtain a metal-containing compound mixture. The resulting metal compound-containing mixture was filled in an alumina boat, heated in an air atmosphere using an electric furnace, and kept at 800° C. for 2 hours to obtain composite metal oxide E1. Composite metal oxide E1, acetylene black as a conductive material (manufactured by Denki Kagaku Kogyo Co., Ltd.), and PVDF as a binder (manufactured by Kleha Co., Ltd., PolyvinylidenDiFluoridePolyflon) are combined according to the composition The metal oxide E1:conductive material:binder=85:10:5 (weight ratio) was we...

Embodiment 1

[0085] (1) Manufacture of carbon materials

[0086] Under a nitrogen stream, 200 g of resorcinol, 1.5 L of methanol, and 194 g of benzaldehyde were added to a four-necked flask, and the flask was cooled, and 36.8 g of 36% hydrochloric acid was added dropwise with stirring. After the titration was completed, the temperature was raised to 65°C, and then kept at a constant temperature for 5 hours. 1 L of water was added to the obtained polymerization reaction mixture, the precipitate was filtered off, the filtrate was neutralized, washed with water, and dried to obtain an organic polymer compound tetraphenylcalix[4]resorcinol arene (テトラフエニル). カリツクス[4] レゾルシナレ一ン) (PCRA) 294g.

[0087] PCRA was put into the rotary kiln, the atmosphere was set to air atmosphere, heated at 300° C. for 1 hour, and then the atmosphere of the rotary kiln was replaced with argon, and heated at 1000° C. for 4 hours. Next, the carbon material C1 as an organic polymer compound sintered body was obtained by ...

Embodiment 2

[0094] (1) Manufacture of positive electrode

[0095] Sodium carbonate (Na 2 CO 3 : Wako Pure Chemical Industries, Ltd.: purity 99.8%), manganese oxide) (IV) (MnO 2 : Made by High Purity Chemical Laboratory Co., Ltd.: Purity 99.9%), iron oxide (II, III) (Fe 3 O 4 : manufactured by High Purity Chemical Laboratory Co., Ltd.: Purity 99%) and nickel (II) oxide (NiO: manufactured by High Purity Chemical Laboratory Co., Ltd.: purity 99.%) The molar ratio of Na:Mn:Fe:Ni is 0.7 : 0.333: 0.333: 0.333 was weighed and mixed with a dry ball mill for 4 hours to obtain a metal compound-containing mixture. A composite metal oxide E2 was obtained by filling the obtained metal compound-containing mixture into an alumina plate, heating in an air atmosphere using an electric furnace, and maintaining at 800° C. for 2 hours. Composite metal oxide E2, acetylene black (manufactured by Denki Chemical Industry Co., Ltd.) as a conductive material, and PVDF (manufactured by Kuraha Co., Ltd., PolyVi...

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Abstract

Disclosed is a sodium rechargeable battery having better cycle characteristics than the conventional sodium rechargeable battery. The sodium rechargeable battery comprises a positive electrode comprising a composite metal oxide, a negative electrode comprising a carbon material, which can occlude and desorb Na ions, and an electrolyte. The composite metal oxide comprises Na and M1, wherein M1 represents two or more elements selected from the group consisting of Mn, Fe, Co, and Ni, and has a Na : M1 molar ratio of a : 1 wherein a is a value in a range of more than 0.5 and less than 1. The sodium rechargeable battery may further comprise a separator. The separator comprises a laminated porous film comprising a heat-resistant resin-containing heat-resistant porous layer and a thermoplastic resin-containing porous film stacked on the heat-resistant resin-containing heat-resistant porous layer.

Description

technical field [0001] The present invention relates to a sodium secondary battery. Background technique [0002] A sodium secondary battery is a secondary battery having a positive electrode and a negative electrode. Lithium secondary batteries are typical as secondary batteries, and have been widely used as small power sources for mobile phones, notebook computers, etc., as well as power sources for vehicles such as electric vehicles and hybrid vehicles, and power sources for distributed power storage. The demand for large-scale power supplies such as these is increasing. However, in a lithium secondary battery, a large amount of rare metal elements such as lithium are contained in the composite metal oxide constituting the positive electrode, and the demand for large-scale power sources increases, and the supply of such raw materials is a concern. [0003] On the other hand, as a secondary battery which can solve the above-mentioned concerns on supply, research on a sod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/50H01M2/16H01M4/52H01M10/40H01M4/48H01M4/58H01M10/36H01M50/414H01M50/417H01M50/426H01M50/449H01M50/489H01M50/491
CPCC01G45/1228H01M4/505Y02E60/122H01M10/054H01M4/525Y02T10/7011H01M2/1686C01P2006/40C01G51/50C01G45/006H01M4/587H01M2/1653Y02E60/10H01M50/449H01M50/491H01M50/426H01M50/489H01M50/414H01M50/417H01M10/058H01M4/50H01M4/52
Inventor 久世智牧寺雅巳山本武继
Owner SUMITOMO CHEM CO LTD
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