Lithium battery negative electrode material, lithium battery and preparation method

Abstract

The present application relates to a kind of lithium battery negative materials, lithium battery and preparation method.Lithium battery negative material is by carbon nanotube and silicon and carbon loaded in its inside.The present application also provides the preparation method of lithium battery negative material, steps are using acid etching carbon nanotube two ends, silicon precursor is introduced into the inside of carbon nanotube, is calcined under the mixed gas of inert gas and organic gas, obtains lithium battery negative material.The present application also provides a kind of lithium battery, and the negative active material of lithium battery is the lithium battery negative material.The present application also provides a kind of preparation method of lithium battery, including: the positive active material and the negative material are respectively with conductive agent and binder homogenate, coating, roll and tablet, obtain positive pole piece and negative pole piece, then with lithium battery diaphragm, laminating assembly etc., obtain lithium battery.The present application solves the problem that existing lithium battery negative material is difficult to simultaneously have high specific energy, fast electron and ion transmission rate and good cycle stability etc..

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