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Negative electrode for non-queous electrolyte secondary battery, non-aqueous electrolyte secondary battery and production method for negative electrode for non-aqueous electrolyte secondary battery

A non-aqueous electrolyte, secondary battery technology, applied in non-aqueous electrolyte storage batteries, secondary batteries, battery electrodes, etc., can solve the problems of high cost of mesophase microspheres, unsatisfactory durability level, etc. Improve graphite packing density, prevent damage and deformation, prevent damage

Active Publication Date: 2013-08-21
ELIIY POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, graphitized mesophase microspheres are costly as they are produced through complex processes and their durability level is not satisfactory

Method used

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  • Negative electrode for non-queous electrolyte secondary battery, non-aqueous electrolyte secondary battery and production method for negative electrode for non-aqueous electrolyte secondary battery
  • Negative electrode for non-queous electrolyte secondary battery, non-aqueous electrolyte secondary battery and production method for negative electrode for non-aqueous electrolyte secondary battery
  • Negative electrode for non-queous electrolyte secondary battery, non-aqueous electrolyte secondary battery and production method for negative electrode for non-aqueous electrolyte secondary battery

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Embodiment 1

[0146] Use 50 parts by mass of scaly graphite particles formed by graphitizing needle coke, 50 parts by mass of granular graphite particles formed by graphitizing coke and coating the surface with graphite, 5 parts by mass SBR, and 1 part by mass as adhesive CMC as a binder and water as a solvent are mixed together to obtain a negative electrode slurry. The negative electrode slurry was applied to the copper foil using a coater and dried at 150°C to obtain a negative electrode.

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Abstract

The present invention provides a negative electrode for a non-aqueous electrolyte secondary battery which can be produced at a reduced cost and has a high graphite packing density and consistent quality. The negative electrode for a non-aqueous electrolyte secondary battery is characterized by comprising a negative-electrode current collector and a negative-electrode active material layer disposed on the negative-electrode current collector, and in that the negative-electrode active material layer contains flaky graphite formed through the graphitization of needle coke, granular graphite formed through the graphitization of coke, and a binder.

Description

Technical field [0001] The present invention relates to a method for manufacturing a negative electrode for a non-aqueous electrolyte secondary battery, a non-aqueous electrolyte secondary battery, and a negative electrode for a non-aqueous electrolyte secondary battery. Background technique [0002] It is well known that graphite having a high energy density per unit volume is used as a negative electrode active material for non-aqueous electrolyte secondary batteries, especially for lithium ion secondary batteries. In particular, graphitized mesophase microspheres are generally used as the negative electrode active material due to their excellent initial charging characteristics and electrode filling performance (for example, refer to Patent Document 1). [0003] However, graphitized mesophase microspheres are costly because they are produced through a complicated process and their durability level is not sufficiently satisfactory. Therefore, graphite materials that are more sui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/133H01M4/1393H01M4/36H01M4/58H01M4/587H01M10/0525H01M10/0566
CPCH01M4/133H01M4/364H01M4/587H01M4/366H01M4/5825H01M2004/021Y02E60/10H01M4/1393H01M4/36H01M4/58H01M10/052H01M10/0566
Inventor 原富太郎福永孝夫井口隆康
Owner ELIIY POWER
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