ANODE MATERIAL, ANODE, BATTERY, AND METHODS OF MANUFACTURING the anode material, the anode and the battery.

A negative electrode material and negative electrode technology, applied in secondary battery manufacturing, batteries, secondary batteries, etc., can solve the problems of reducing cycle characteristics, increasing the volume density of the negative electrode active material layer, and thickening the negative electrode active material layer, so as to suppress decomposition. Effects of reaction, improvement of chemical stability, improvement of cycle characteristics

Active Publication Date: 2014-11-12
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when charge and discharge are repeatedly performed, by using a carbon material as an anode active material, in the case of thickening the anode active material layer and increasing the volume density of the anode active material layer, the cycle characteristics are lowered.

Method used

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  • ANODE MATERIAL, ANODE, BATTERY, AND METHODS OF MANUFACTURING the anode material, the anode and the battery.
  • ANODE MATERIAL, ANODE, BATTERY, AND METHODS OF MANUFACTURING the anode material, the anode and the battery.
  • ANODE MATERIAL, ANODE, BATTERY, AND METHODS OF MANUFACTURING the anode material, the anode and the battery.

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no. 1 example

[0034] figure 1 A cross-sectional view of the negative electrode material according to the first embodiment of the present invention is schematically shown. The negative electrode material 10 is used, for example, in an electrochemical device including a negative electrode, such as a battery. The negative electrode material 10 has a negative electrode active material 1 capable of intercalating and deintercalating electrode reactants and a plurality of coated particles 2 disposed thereon.

[0035] The negative electrode active material 1 contains one or more materials capable of intercalating and deintercalating electrode reactants, and includes, for example, a carbon material. In carbon materials, changes in crystal structure during electrode reactions (intercalation and deintercalation of electrode reactants) are very small, resulting in high energy density. The type of electrode reactant can be selected arbitrarily. For example, when the negative electrode material is use...

no. 2 example

[0117] Hereinafter, a description will be given of a second embodiment of the present invention.

[0118] The negative electrode material of this embodiment has a structure similar to that of the negative electrode material of the first embodiment (refer to figure 1 ), the difference is that the constituent materials of the negative electrode active material 1 are different.

[0119] The negative electrode active material 1 contains, for example, a material containing at least one of a metal element and a metalloid element as one or more materials capable of intercalating and deintercalating electrode reactants, because thereby a high energy density can be obtained . Such a material containing at least one of a metal element and a metalloid element may be a single substance, an alloy, or a compound of a metal element or a metalloid element, or may at least partially have one or more phases thereof.

[0120] The alloy in the present invention includes not only the alloy compo...

example 1-1

[0142] Figure 2 to Figure 4 The illustrated cylindrical secondary battery was manufactured in the following steps. This secondary battery is manufactured as a lithium ion secondary battery in which the capacity of the negative electrode 34 is expressed based on intercalation and deintercalation of lithium.

[0143] First, the positive electrode 21 is formed. First, lithium carbonate (Li 2 CO 3 ) and cobalt carbonate (CoCO 3 ) are mixed in a molar ratio of 0.5:1. Thereafter, the mixture was fired at 900° C. in air for 5 hours. Thus, lithium cobalt composite oxide (LiCoO 2 ). When the lithium-cobalt composite oxide was analyzed by the X-ray diffraction method, the peaks obtained were completely consistent with the peaks recorded in the documents of the Joint Committee of Powder Diffraction Standard (JCPDS). Subsequently, the lithium cobalt composite oxide was pulverized into powder. After that, 95 parts by weight of lithium-cobalt composite oxide powder and 5 parts by ...

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Abstract

An anode and battery including the anode capable of improving the cycle characteristics while securing the input and output characteristics is provided. The battery includes a cathode, an anode, and an electrolytic solution. The anode includes an anode active material layer on an anode current collector, wherein the anode active material layer includes an anode active material capable of intercalating and deintercalating an electrode reactant, wherein a thickness of the anode active material layer ranges from 60 μm to 120 μm, and wherein the anode active material includes a carbon material and at least part of a surface is covered by a covering, the covering including at least one of an alkali metal salt and an alkali earth metal salt.

Description

[0001] The present invention is a divisional application with application number 200810133033.8 filed on July 4, 2008 and titled "Negative Electrode Material, Negative Electrode, Battery and Their Manufacturing Method". [0002] Cross References to Related Applications [0003] The present invention contains subject matter related to Japanese Patent Application JP2007-178365 filed in Japan Patent Office on Jul. 6, 2007, the entire content of which is hereby incorporated by reference. technical field [0004] The invention relates to a negative electrode material with a negative electrode active material, a negative electrode and a battery using the negative electrode material, and their manufacturing methods. Background technique [0005] In recent years, portable electronic devices such as combination video cameras (video tape recorders), mobile phones, and notebook computers have been widely used, and reduction in their size and weight and their long life are strongly dema...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/133H01M4/134H01M4/136H01M4/36H01M4/62H01M10/04H01M4/13H01M4/38H01M4/48H01M4/587H01M10/0566
CPCH01M4/587H01M4/58H01M10/0525H01M4/387H01M4/1393H01M2300/0042H01M4/134H01M2220/30H01M4/133H01M4/386H01M4/1395H01M4/366H01M4/38H01M4/136H01M4/62Y02E60/122H01M4/131Y02E60/10Y10T29/49108Y02P70/50H01M4/36
Inventor 胁田真也冈江功弥
Owner MURATA MFG CO LTD
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