Active material for nonaqueous secondary battery and nonaqueous secondary battery
A secondary battery, active material technology, applied in secondary batteries, non-aqueous electrolyte batteries, battery electrodes, etc., can solve problems such as doping
Inactive Publication Date: 2011-12-07
TOYOTA IND CORP
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Problems solved by technology
However, so far there is no FeF 3 Easily decomposed and decomposed FeF 3 From the viewpoint of reversible regeneration, from the standpoint of battery performance, the reaction up to the conversion region has to be avoided.
In addition, FeF 3 It shows a high capacity because it is used up to the conversion region, but since the active material does not contain lithium, it is necessary to use metal lithium as a counter electrode or dope lithium in the active material in advance
Method used
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Embodiment
[0044] Hereinafter, the present invention will be specifically described by giving examples of the active material for a non-aqueous secondary battery and the non-aqueous secondary battery of the present invention.
[0045] [Modulation of active substances]
[0046] LiF powder (manufactured by Soekawa Rika Co., Ltd., average particle diameter: 3 μm) and commercially available Fe powder (average particle diameter: 3 μm) were prepared. 5 g of LiF powder and 7 g of Fe powder were weighed (LiF:Fe=3:1 in molar ratio), and mixed by a ball mill. When mixing, the grinding speed was set at 600 rpm and the grinding time was set at 24 hours. The obtained mixed powder (active material #01) was subjected to X-ray diffraction analysis (CuKα). show the result in figure 2 . should be explained, figure 2 The X-ray diffraction pattern of the mixed powder (active material #00) obtained by stirring by hand for several minutes is also shown in . Since the diffraction peak of active materia...
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Abstract
The present invention relates to an active material for a nonaqueous secondary battery and a nonaqueous secondary battery. The active material for a non-aqueous secondary battery of the present invention is characterized in that it is composed of a mixture of an alkali metal salt and a transition metal, and undergoes reversible oxidation and reduction by charge and discharge, that is, a compound formed by the reaction of an alkali metal salt and a transition metal. Alkali metals are deintercalated, and alkali metal salts and transition metals are regenerated from the compounds intercalated with alkali metals. By using this active material in a non-aqueous secondary battery, it becomes possible to increase the capacity of the non-aqueous secondary battery. Furthermore, since the active material for a non-aqueous secondary battery of the present invention contains an alkali metal functioning as an electrolyte ion, the active material used for the counter electrode is not limited. For example, since the lithium ion secondary battery does not need to use an electrode containing metallic lithium, safety is improved.
Description
technical field [0001] The present invention relates to nonaqueous secondary batteries such as lithium ion secondary batteries, and particularly relates to an active material for nonaqueous secondary batteries. Background technique [0002] Secondary batteries such as lithium-ion secondary batteries are small and have a large capacity, so they can be used in a wide range of fields such as mobile phones and notebook computers. Lithium-ion secondary batteries have active materials capable of intercalating and deintercalating lithium (Li) at the positive electrode and the negative electrode, respectively. And, it works by moving Li ions in the electrolyte solution provided between the two electrodes. [0003] The performance of a secondary battery is governed by the materials constituting the positive electrode, negative electrode, and electrolyte of the secondary battery. In particular, research and development of active material materials that form active materials are in f...
Claims
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IPC IPC(8): H01M4/58H01M4/36H01M4/485H01M4/505H01M4/525H01M10/052H01M10/054
CPCY02E60/122H01M4/136H01M4/582H01M4/364H01M4/388H01M10/0525Y02E60/10H01M10/05H01M4/36
Inventor 丹羽淳一村濑仁俊
Owner TOYOTA IND CORP