Battery electrodes and methods of manufacture
AssigneeA123 Systems, Inc.
InventorsYet-Ming Chiang, Shen J. Dillon, Richard K. Holman
Life of this patent
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Abstract
This disclosure relates to compositions and methods of manufacture of electrodes for batteries, including rechargeable lithium batteries, wherein at least one electrode comprises an electroactive material and a malleable metal. The electrode may be substantially free of other conductive additives and organic binders. Manufacture of the electrode may be performed without solvent or sintering.
Claims60
An electrode for an electrochemical cell, comprising a particulate electroactive material chosen from one of LiCoO2, LiCoO2 doped with Mg, LiNiO2, NCA, LiAlO2, NMC, graphitic carbon, Ag, Al, Au, B, Ga, Ge, In, Sb, Sn, Si or Zn, and a conductive binder comprising a particulate malleable metal having a D50 particle size value ranging from about 0.5 μm to about 20 μm that is electrochemically stable over the range of voltages experienced by the electroactive material in use, wherein at least a portion of the metal particles form a conductive contact between at least a portion of the electroactive material particles, and wherein the electrode has greater than or equal to about 10% open porosity and wherein the electrochemical cell is a secondary cell.
An electrochemical cell, comprising a first electrode, a second electrode, and an electrolyte, wherein the first-electrode
- (a) comprises a first particulate electroactive material chosen from one of LiCoO2, LiCoO2 doped with Mg, LiNiO2, NCA, LiAlO2, NMC, graphitic carbon, Ag, Al, Au, B, Ga, Ge, In, Sb, Sn, Si or Zn, and a first particulate malleable metal having a D50 particle size value ranging from about 0.5 μm to about 20 μm that is electrochemically stable over the range of voltages experienced by the first electroactive material in use, wherein at least a portion of the first metal particles form a conductive contact between at least a portion of the first electroactive material particles, and
- (b) has greater than or equal to about 10% open porosity;
- and wherein the electrochemical cell is a secondary cell.
Dependencies are inferred from the claim text.