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Breakthrough in Nonaqueous Electrolyte Battery Development

Strategic Insights

— 2 min read

Researchers at KABUSHIKI KAISHA TOSHIBA have made significant advancements in the field of nonaqueous electrolyte battery technology, led by inventors Saruwatari, Hidesato; Inagaki, Hiroki; Morishima, Hideaki; Matsuno, Shinsuke; Fujita, Yumi; and Takami, Norio. Their patented design, filed on February 27, 2013, and published online on December 15, 2015, has the potential to revolutionize the energy storage industry.

The new battery design features a unique combination of active material particles with average diameters of 1 μm or less and 2 to 50 μm, having true densities that differ by 0.01 to 2.5 g/cm^3. This innovative approach enables improved discharge performance and increased battery life. The invention also proposes the use of a negative electrode made of a current collector and an active material layer containing first and second active material particles, which allows for enhanced capacity and efficiency.

Key Takeaways:

  • The patented design achieves improved discharge performance by using a combination of active material particles with different average diameters and true densities.
  • The unique combination of particles enables the battery to operate efficiently, with an improved capacity and efficiency compared to traditional designs.
  • The invention proposes the use of a negative electrode made of a current collector and an active material layer containing first and second active material particles.
  • The true density of the second active material particles is larger by 0.01 to 2.5 g/cm^3 than the true density of the first active material particles.
  • The battery design features a positive electrode, a negative electrode, and a nonaqueous electrolyte.
  • The invention aims to improve the performance of nonaqueous electrolyte batteries for various applications, including rechargeable vacuum cleaners.

Statistics:

  • The new battery design features first active material particles with an average particle diameter of 1 μm or less and a lithium diffusion coefficient of 1 × 10^(-9) cm^2/sec or less at 20°C.
  • The second active material particles have an average particle diameter of 2 to 50 μm.
  • The true density of the second active material particles is larger by 0.01 to 2.5 g/cm^3 than the true density of the first active material particles.

Sources:

  • Saruwatari, Hidesato; Inagaki, Hiroki; Morishima, Hideaki; Matsuno, Shinsuke; Fujita, Yumi; Takami, Norio. Nonaqueous Electrolyte Battery, Battery Pack and Rechargeable Vacuum Cleaner. U.S. Patent Number 9214671, filed February 27, 2013, and published online on December 15, 2015. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9214671.PN.&OS=PN/9214671RS=PN/9214671

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