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Solid electrolyte, lithium-ion battery and method for producing lithium-ion battery

A solid electrolyte and lithium-ion battery technology, which is applied in the direction of batteries with solid electrolytes, electrolyte battery manufacturing, solid electrolytes, etc., can solve problems such as electrode short circuits, and achieve the effect of preventing internal short circuits and maintaining safety

Inactive Publication Date: 2005-03-23
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when both layers are formed only of a sticky soft solid electrolyte layer, each electrode may penetrate the solid electrolyte due to external pressure to cause a short circuit.

Method used

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  • Solid electrolyte, lithium-ion battery and method for producing lithium-ion battery
  • Solid electrolyte, lithium-ion battery and method for producing lithium-ion battery
  • Solid electrolyte, lithium-ion battery and method for producing lithium-ion battery

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Embodiment 1

[0070] The formation of the cathode is described below. First, the lithium composite oxide LiCoO with 91 parts by weight as the cathode active material 2 . 6 parts by weight of graphite as a conductive agent and 3 parts by weight of polyvinylidene fluoride as a binder are mixed to obtain a cathode composite mixture. The cathode composite mixture was dissolved in 1-methyl-2-pyrrolidone as a solvent to obtain a slurry-like cathode coating solution.

[0071] Then, the obtained cathode coating solution is coated on a rectangular aluminum foil as a cathode current collector so that the coating density is 1.41 mg / cm 2 . The cathode coating solution was dried at 110° C., and press-molded with a roll press to form a cathode having a cathode active material layer laminated on a cathode current collector. Then, aluminum foil was cut into rectangles to prepare cathode leads. The cathode lead is connected to the cathode current collector under pressure.

[0072] Then, an anode is for...

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Abstract

A lithium-ion battery includes a cathode and an anode capable of being doped with and dedoped from lithium and a solid electrolyte provided between the cathode and the anode. The solid electrolyte comprises a multi-layer structure having three layers or more. A layer nearest to the cathode side and a layer nearest to the anode side of the layers include first polymers which have a low glass transition point, do not have functional groups capable of being crosslinked and are not crosslinked. At least one layer except the layers located at positions nearest to the cathode side and the anode side of the layers includes a second polymer that has a functional group capable of being crosslinked and is crosslinked. Thus, the electrode utilization factor of the cathode and the anode is improved.

Description

technical field [0001] The invention relates to a solid electrolyte with excellent battery performance, a lithium ion battery and a method for preparing the lithium ion battery. [0002] This application claims priority from Japanese Patent Application No. 2003-278497 filed on July 23, 2003, the entire contents of which are incorporated herein by reference. Background technique [0003] In recent years, a large number of portable electronic devices have appeared, such as video cameras with video tape recorders, portable phones, portable computers, etc., and attempts have been made to miniaturize and reduce the weight of these electronic devices. As these electronic devices are miniaturized and reduced in weight, the batteries used as their portable power sources are also required to be smaller and lighter. As a battery satisfying these requirements, for example, a lithium-ion rechargeable battery and the like are mentioned. [0004] The lithium ion rechargeable battery inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/00H01B1/06H01M4/02H01M4/36H01M6/18H01M10/05H01M10/0525H01M10/0565H01M10/058
CPCH01M4/525H01M2300/0094H01M10/0525H01M6/181H01M10/0565H01M6/187Y10T29/49115H01M2300/0082Y02E60/122H01M4/133H01M4/131Y02E60/10Y02P70/50H01M10/058
Inventor 安田寿和
Owner SONY CORP
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