Nonaqueous lithium power storage element

A technology for electric storage components and non-aqueous electrolytes, which can be applied to electrical components, non-aqueous electrolyte batteries, lithium batteries, etc., and can solve problems such as risks to the safety of electric storage components

Active Publication Date: 2018-08-31
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the inner surface of the metal exterior body or the exhaust valve reacts with the generated HF, and leakage may occur in some cases, thereby posing a risk to the safety of the storage device.

Method used

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  • Nonaqueous lithium power storage element
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  • Nonaqueous lithium power storage element

Examples

Experimental program
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preparation example Construction

[0272] The preparation method of the coating liquid of the positive electrode precursor is not particularly limited, and a disperser such as a homodisperser, a multi-shaft disperser, a planetary mixer, a thin film rotary high-speed mixer, and the like can be suitably used. In order to obtain a coating liquid in a good dispersion state, it is preferable to disperse at a peripheral speed of 1 m / s to 50 m / s. When the peripheral speed is 1 m / s or more, various materials can be dissolved or dispersed well, which is preferable. When the peripheral speed is 50 m / s or less, various materials are less likely to be damaged by heat or shear force due to dispersion, and re-agglomeration is less likely to occur, which is preferable.

[0273] Regarding the dispersion degree of the coating liquid, the particle size measured by a particle size meter is preferably 0.1 μm or more and 100 μm or less. As the upper limit of the degree of dispersion, the particle size is more preferably 80 μm or l...

Embodiment 1

[0511]

preparation example

[0513] The broken coconut shell carbides were carbonized in a small carbonization furnace at 500° C. for 3 hours under a nitrogen atmosphere to obtain carbides. Put the obtained carbides into the activation furnace, introduce 1 kg / h of water vapor into the activation furnace in the state of being heated by the preheating furnace, and raise the temperature to 900°C for 8 hours for activation. The activated carbide was taken out and cooled under a nitrogen atmosphere to obtain activated activated carbon. The obtained activated carbon was washed with water for 12 hours to remove water. Thereafter, it was dried in an electric dryer maintained at 125°C for 10 hours, and then pulverized with a ball mill for 1 hour to obtain activated carbon 1a 1 .

[0514] For the activated carbon 1a 1 , The average particle diameter was measured using a laser diffraction particle size distribution analyzer (SALD-2000J) manufactured by Shimadzu Corporation, and it was 12.7 μm. In addition, the p...

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Abstract

Provided is a nonaqueous lithium power storage element that can suppress excessive decomposition of a lithium compound remaining in a positive electrode, can suppress gas generation at high voltages,and can suppress capacity declines during high-load charge/discharge cycling. The nonaqueous lithium power storage element according to the present embodiment has a positive electrode that contains alithium compound other than an active material, a negative electrode, a separator, and a lithium ion-containing nonaqueous electrolyte, wherein in the elemental map provided by SEM-EDX of the surfaceof the positive electrode, the area overlap ratio U1 of the fluorine map relative to the oxygen map, as provided by binarization based on the average value of the brightness values, is 40% to 99%.

Description

【Technical field】 [0001] The invention relates to a non-aqueous lithium storage element. 【Background technique】 [0002] In recent years, from the perspective of protecting the global environment and saving resources and effectively using energy, wind power generation power stabilization systems or late-night power storage systems, household distributed power storage systems based on photovoltaic power generation technology, and electric vehicles Power storage systems and the like are attracting attention. [0003] The first requirement for batteries used in these power storage systems is high energy density. As a powerful supplement to high-energy-density batteries that can meet such demands, development of lithium-ion batteries has been actively promoted. [0004] The second required item is high output characteristics. For example, in a combination of a high-efficiency engine and a power storage system (such as a hybrid electric vehicle), or a combination of a fuel cel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/06H01M4/1393H01M10/052H01M10/0567H01M10/0585
CPCH01G11/06H01G11/24H01G11/26H01G11/38H01G11/50H01G11/52H01G11/60H01G11/62H01G11/70H01M4/1393H01M10/052H01M10/0567H01M10/0585Y02E60/10Y02T10/70Y02P70/50H01G11/46H01G11/58H01G11/78H01M4/5825H01M10/0525H01M10/0568H01M10/0569H01M2004/028H02J9/00Y02E60/13
Inventor 梅津和照冈田宣宏平冈浩一细木原睦士末富拓
Owner ASAHI KASEI KK
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