A123 Systems LLC

Samsung Electronics Co., Ltd.

Corning Incorporated

Karen E Thomas-Alyea

Yet-Ming Chiang

Lincoln James Miara

Michael Edward Badding

Gilbert N Riley, Jr

Hyunseok Kim

Zhen Song

Jusik Kim

Ricardo Fulop

Anthony Edward Pullen

Andrew C Chu

William H Gardner

Young-Il Jang

Nonglak Meethong

Yu-Hua Kao

Dongmin Im

Richard K Holman

Susan J Babinec

SeWon Kim

Jeong-Ju Cho

Masoud Aryanpour

Robert Wilson Ashcraft

Yong-Gun Lee

A solid electrolyte including an inorganic lithium ion conductive film and a porous layer on a surface of the inorganic lithium ion conductive film, wherein the porous layer includes a first porous layer and a second porous layer, and the second porous layer is disposed between the inorganic lithium ion conductive film and the first porous layer, and wherein the first porous layer has a size greater which is than a pore size of the second porous layer.

Solid electrolyte, method of preparing the same, and secondary battery including the same

A solid electrolyte for a negative electrode of a secondary battery includes a first porous solid electrolyte having a first surface; a first coating on the first surface of the first porous solid electrolyte; an adhesive electrolyte layer on the first porous solid electrolyte; and a second porous solid electrolyte on the adhesive electrolyte layer, the second porous solid electrolyte having a second surface; wherein the first porous solid electrolyte and the second porous solid electrolyte each have an ionic conductivity effective for a deposition metal; and wherein a surface of the first coating is less favorable for deposition of the deposition metal than the second surface of the second solid electrolyte. An electrode assembly and an electrochemical cell including the solid electrolyte and method for the manufacture thereof are also described.

Solid electrolyte for a negative electrode of a secondary battery and methods for the manufacture of an electrochemical cell

A solid electrolyte for a negative electrode of a secondary battery includes a first solid electrolyte having a first surface and a second solid electrolyte on the first solid electrolyte and having a second surface. The first solid electrolyte and the second solid electrolyte each have an ionic conductivity effective for a deposition metal, and the first surface and the second surface are different in composition, structure, or both. An electrode assembly and an electrochemical cell including the solid electrolyte and method for the manufacture thereof are also described.

Solid electrolyte for a negative electrode of a secondary battery including first and second solid electrolytes with different affinities for metal deposition electronchemical cell and method of manufacturing

An electrode is provided having a front region adjacent to a separator and a back region adjacent to a current collector. The electrode includes an anion-absorbing material and a cation-absorbing material. The electrode exhibits a compositional profile such that the anion-absorbing material is present at a higher volume percent at the back region than at the front region. Also provided are electrochemical cells that employ such an electrode as a positive electrode. Optionally, the cells include an electrolyte comprised of a solution of a solvent and a salt dissolved therein at a concentration of at least about 2M when the cell is in a fully discharged state.

Electrode containing both anion-absorbing and cation-absorbing active materials

Porous separators for use in electrochemical cells and methods of their manufacture are provided. The separators are porous structures comprising an electroactive material and an electronically insulating structural material, wherein the electroactive material forms a percolating path in the separator.

Separator including electroactive material for overcharge protection

Electroactive compositions are disclosed for use in lithium ion battery electrodes. The compositions, such as multifunctional mixed metal olivines, provide an electrochemical cell having a plurality of open circuit voltages at different states of charge. The compositions afford improved state-of-charge monitoring, overcharge protection and/or overdischarge protection for lithium ion batteries.

Multifunctional mixed metal olivines for lithium ion batteries

A method of determining state of charge of an energy delivery device includes sampling voltage values of the energy delivery device during relaxation of the device. The method further includes regressing an open circuit voltage value and the total overpotential being relaxed. The regression includes a predetermined time constant of relaxation associated with the energy delivery device. One embodiment uses the equation V(t)=OCV&#x2212;&#x3b1; exp(&#x2212;t/tau), where V(t) represents the sampled voltage values, t represents times at which each of the voltage values are sampled, OCV represents the open circuit voltage value of the energy delivery device, &#x3b1;represents the overpotential value, and tau represents the time constant of relaxation. The method uses a predetermined profile that relates open circuit voltage of the energy delivery device to state of charge of the device, to determine a particular state of charge corresponding to the regressed open circuit voltage value.

Method and system for determining state of charge of an energy delivery device

A battery management system includes one or more lithium ion cells in electrical connection, each said cell comprising: first and second working electrodes and one or more reference electrodes, each reference electrode electronically isolated from the working electrodes and having a separate tab or current collector exiting the cell and providing an additional terminal for electrical measurement; and a battery management system comprising a battery state-of-charge monitor, said monitor being operable for receiving information relating to the potential difference of the working electrodes and the potential of one or more of the working electrodes versus the reference electrode.

Lithium rechargeable cell with reference electrode for state of health monitoring

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Arlington, MA, United States of America

Karen E Thomas-Alyea