Case 6774/8039/11688/13787

Solid Polymer Electrolyte Lithium Ion Battery

Keywords:

Lithium solid state batteries, cathodes, intercalation, block copolymeric electrolyte, lithium-sink particles

Applications:

Lithium batteries for cellular phones, laptop computers and other consumer electronic products

Problem:
  • Time, effort and cost associated with development of lithium intercalation compounds
  • Mechanical properties of lithium solid polymer electrolytes

Technology:

These inventions propose novel designs and fabrication methods for solid polymer electrolyte lithium ion batteries. One invention proposes a method to reduce increased resistance across the electrode due to repeated cycling leads. This occurs due to passivation of the interface between the IC(?) and the electrolyte and disconnection from the graphite. One invention presents a modification of the chemical structure of the block copolymer electrolyte to create a self-doped polymer electrolyte. One invention presents methods of predicting the potential utility of metal dichalgogenide compounds for use in lithium intercalation compounds and for processing lithium intercalation oxides with the structure and compositional homogeneity to increase the formation energies of said compounds. One invention provides improved ion host particles, polymer electrolytes and electrodes for lithium batteries. The host particles can be made by dispersing precursor powders, drying the suspension, heating the powder to cause crystallization and other precipitation and co-precipitation techniques, and are then arranged as an electrolyte in a battery.

Advantages:
  • Robust microstructure reduces failure due to loss of electrical contact with IC particles
  • Use of self-doped BCE in Li battery cathode improves efficiency and safety of the electrolyte
  • Increase the formation energies of metal dichalgogenide compounds
  • Improved ion host particles and electronic and mechanic properties of lithium solid polymer electrodes

Inventors:
  • Professor Donald Sadoway(Department of Materials Science and Engineering, MIT)
  • Professor Yet-Ming Chiang(Department of Materials Science and Engineering, MIT)
  • Professor Anne Mayes(Department of Materials Science and Engineering, MIT)
  • Professor Gerbrand Ceder(Department of Materials Science and Engineering, MIT)
  • Philip Soo (Department of Materials Science and Engineering, MIT)
  • Mehmet Aydinol (Department of Materials Science and Engineering, MIT)
  • Young-II Jang (Department of Materials Science and Engineering, MIT)
  • Biying Huang (Department of Materials Science and Engineering, MIT)
  • Pallab Banerjee (Center for Molecular Imaging Research, Harvard)

Intellectual Property:

Case 6774: US Patent Number 7,026,071 issued April 11, 2006 and other foreign patents

Case 8039: U.S. Patent Number 6,361,901 issued March 26, 2002

Case 11688: U.S. Patent application 11/101723 filed on April 8, 2005

Publications:

N/A

Last revised:December 9, 2010

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