COMPOSITE ANODE MATERIAL MADE OF CORE-SHELL PARTICLES
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Accused Products
Abstract
Core-shell particles, composite anode material, anodes made therefrom, lithium ion cells and methods are provided, which enable production of fast charging lithium ion batteries. The composite anode material has core-shell particles which are configured to receive and release lithium ions at their cores and to have shells that are configured to allow for core expansion upon lithiation. The cores of the core-shell particles are connected to the respective shells by conductive material such as carbon fibers, which may form a network throughout the anode material and possibly interconnect cores of many core-shell particles to enhance the electrical conductivity of the anode. Ionic conductive material and possibly mechanical elements may be incorporated in the core-shell particles to enhance ionic conductivity and mechanical robustness toward expansion and contraction of the cores during lithiation and de-lithiation.
25 Citations
22 Claims
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1. (canceled)
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2. (canceled)
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3. (canceled)
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6. (canceled)
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7. (canceled)
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8. (canceled)
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9. (canceled)
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10. Composite anode material comprising:
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core-shell particles comprising cores configured to receive and release lithium ions and shells configured to allow for core expansion upon lithiation, and electrically conductive material which interconnects the cores of the core-shell particles, wherein the shells of the core-shell particles are made of LTO (lithium titanate oxide) embedded in a conductive polymer. - View Dependent Claims (4, 5, 11, 12, 14, 15, 16)
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13. (canceled)
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17-21. -21. (canceled)
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22. A method of making an anode for a lithium ion cell comprising:
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providing composite anode material comprising core-shell particles configured to receive and release lithium ions at their cores and to allow for core expansion within their shells upon lithiation, and interconnecting the cores of the core-shell particles by electrically conductive material, wherein the shells of the core-shell particles are made of LTO (lithium titanate oxide) embedded in a conductive polymer.
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Specification