Patents by Inventor Sujin Um

Sujin Um has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Negative active material for rechargeable lithium battery and rechargeable lithium battery comprising same
    Patent number: 10847793
    Abstract: A negative active material for a rechargeable lithium battery includes a lithium titanate compound represented by Chemical Formula 1, where R, a Raman spectrum intensity ratio (I(F2u)/I(F2g)) of an F2u peak in a range of about 200 cm?1 to about 300 cm?1 relative to an F2g peak in a range of about 400 cm?1 to about 550 cm?1 is greater than or equal to about 0.7. Li4+xTi5?yMzO12?n??Chemical Formula 1 In Chemical Formula 1, ?0.2?x?0.2, ?0.3?y?0.3, 0?z?0.3, ?0.3?n?0.3, and M is selected from Mg, Al, Ca, Sr, Cr, V, Fe, Co, Ni, Zr, Zn, Si, Y, Nb, Ga, Sn, Mo, W, Ba, La, Ce, Ag, Ta, Hf, Ru, Bi, Sb, As, and a combination thereof.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: November 24, 2020
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Soojeong Lee, Young-Kee Kim, Dong-Hyun Shin, Sun-Il Park, Sujin Um
  • Negative electrode for rechargeable lithium battery, and rechargeable lithium battery including same
    Patent number: 10559818
    Abstract: A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same. The negative electrode for a rechargeable lithium battery includes a negative active material layer including a negative active material including a Si-based active material; nanoclay; and an aqueous binder; and a current collector supporting the negative active material layer.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: February 11, 2020
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hyunuk Cho, Byoung Dong Kim, Eun Jung Kim, Sujin Um
  • Separator for rechargeable lithium battery and rechargeable lithium battery including same
    Patent number: 10439189
    Abstract: A separator for a rechargeable lithium battery includes a polymer substrate, and a coating layer on at least one surface of the polymer substrate. The coating layer includes a ceramic, a binder, and a nanoclay having an interlayer spacing (d-spacing) of about 10 ? to about 50 ?.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: October 8, 2019
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sujin Um, Jung Woo An, Jungyeon Won, Jungwook Cha
  • SEPARATOR FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME
    Publication number: 20180083248
    Abstract: A separator for a rechargeable lithium battery includes a polymer substrate, and a coating layer on at least one surface of the polymer substrate. The coating layer includes a ceramic, a binder, and a nanoclay having an interlayer spacing (d-spacing) of about 10 ? to about 50 ?.
    Type: Application
    Filed: September 18, 2017
    Publication date: March 22, 2018
    Inventors: Sujin UM, Jung Woo AN, Jungyeon WON, Jungwook CHA
  • NEGATIVE ELECTRODE FOR RECHARGEABLE LITHIUM BATTERY, AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME
    Publication number: 20180034047
    Abstract: A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same. The negative electrode for a rechargeable lithium battery includes a negative active material layer including a negative active material including a Si-based active material; nanoclay; and an aqueous binder; and a current collector supporting the negative active material layer.
    Type: Application
    Filed: July 25, 2017
    Publication date: February 1, 2018
    Inventors: Hyunuk CHO, Byoung Dong KIM, Eun Jung KIM, Sujin UM
  • NEGATIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY COMPRISING SAME
    Publication number: 20160344024
    Abstract: A negative active material for a rechargeable lithium battery includes a lithium titanate compound represented by Chemical Formula 1, where R, a Raman spectrum intensity ratio (I(F2u)/I(F2g)) of an F2u peak in a range of about 200 cm?1 to about 300 cm?1 relative to an F2g peak in a range of about 400 cm?1 to about 550 cm?1 is greater than or equal to about 0.7. Li4+xTi5?yMzO12?n ??Chemical Formula 1 In Chemical Formula 1, ?0.2?x?0.2, ?0.3?y?0.3, 0?z?0.3, ?0.3?n?0.3, and M is selected from Mg, Al, Ca, Sr, Cr, V, Fe, Co, Ni, Zr, Zn, Si, Y, Nb, Ga, Sn, Mo, W, Ba, La, Ce, Ag, Ta, Hf, Ru, Bi, Sb, As, and a combination thereof.
    Type: Application
    Filed: May 9, 2016
    Publication date: November 24, 2016
    Inventors: Soojeong Lee, Young-Kee Kim, Dong-Hyun Shin, Sun-Il Park, Sujin Um