COMPOSITE ELECTRODE MATERIAL FOR LITHIUM ION BATTERY AND PREPARATION METHOD THEREOF
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United States of America Patent
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Jun 30, 2014
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Dec 30, 2011
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The invention provides a composite electrode material for a lithium ion battery. The composite electrode material includes an electrode material and a conductive polymer. The conductive polymer coats the surface of the electrode material with a thickness of several nano-meter level. The electrode material is a positive electrode material or a negative electrode material, and the conductive polymer tends to disperse in an aqueous solution or an organic solution in the presence of a doping and dispersing agent and a dispersing medium. The conductive polymer is selected from poly(3,4-ethylenedioxythiophene) (PEDOT), polyaniline (PANT), or polypyrrole (PPy), the doping and dispersing agent is polystyrene sulfonic acid (PSS), and the dispersing medium is water; or the conductive polymer is polyaniline(emeraldine salt), and the dispersing medium is xylene. A method for preparing the composite electrode material for a lithium ion battery is also provided.
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