18590265. NEGATIVE ELECTRODE ACTIVE MATERIAL LAYER AND SOLID-STATE SECONDARY BATTERY simplified abstract (TOYOTA JIDOSHA KABUSHIKI KAISHA)

NEGATIVE ELECTRODE ACTIVE MATERIAL LAYER AND SOLID-STATE SECONDARY BATTERY

Organization Name

TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor(s)

Ryosuke Furuya of Gotemba-shi (JP)

NEGATIVE ELECTRODE ACTIVE MATERIAL LAYER AND SOLID-STATE SECONDARY BATTERY - A simplified explanation of the abstract

This abstract first appeared for US patent application 18590265 titled 'NEGATIVE ELECTRODE ACTIVE MATERIAL LAYER AND SOLID-STATE SECONDARY BATTERY

The present disclosure describes a negative electrode active material layer for a solid-state secondary battery, where the electrical conductivity of silicon active material particles is enhanced by reducing the amount of oxygen atoms in the particles. This improvement in conductivity is achieved without compromising electrical resistance, even at low charging capacities.

• Silicon active material particles in the negative electrode layer have less than 5.0% oxygen atoms by mass.
• The layer also contains solid electrolyte particles with an average size of 1.0 μm or less.
• The ratio of the average particle size of the solid electrolyte particles to the silicon active material particles is 0.9 or less.

Potential Applications: - Solid-state secondary batteries - Energy storage systems - Electric vehicles - Portable electronic devices

Problems Solved: - Enhanced electrical conductivity of silicon active material particles - Maintaining low electrical resistance at low charging capacities

Benefits: - Improved battery performance - Longer lifespan - Higher energy density

Commercial Applications: Title: Enhanced Silicon Active Material for Solid-State Batteries This technology can be utilized in the development of more efficient and durable solid-state batteries for various applications, including electric vehicles and portable electronics. The market implications include increased demand for high-performance energy storage solutions.

Questions about the technology: 1. How does reducing the amount of oxygen atoms in silicon active material particles improve electrical conductivity? 2. What are the advantages of using solid electrolyte particles in the negative electrode active material layer?

Original Abstract Submitted

An object of the present disclosure is to provide a negative electrode active material layer, in which electrical conductivity of silicon active material particles is improved by decreasing the amount of oxygen atoms in the silicon active material particles while electrical resistance is less likely to deteriorate even when charging capacity of a battery is low, and a solid-state secondary battery comprising such a negative electrode active material layer. The negative electrode active material layer of the present disclosure contains silicon active material particles and solid electrolyte particles, wherein an amount of oxygen atoms in the silicon active material particles is less than 5.0% by mass, and an average particle size of the solid electrolyte particles is 1.0 μm or less and/or a ratio of an average particle size of the solid electrolyte particles relative to an average particle size of the silicon active material particles is 0.9 or less.