| abstract |
The present invention provides a kind of preparation method of the composite negative pole material of lithium ion battery, includes the following steps：Step 1：It takes NaOH powder to be added into deionized water, stirs 15~30min, NaOH solution is made；A concentration of 3~4mol/L of the NaOH solution；Step 2：According to Sn：Co=1：2 molar ratio weighs inorganic tin salts and inorganic cobalt salt, is dissolved in deionized water, stirs 30~60min, and mixed solution is made；Step 3：NaOH solution made from step 1 is dropped in mixed solution made from step 2,20~40min is stirred, presoma mixed liquor is made；Step 4：Presoma mixed liquor made from step 3 is transferred in reaction kettle and is sealed, after carrying out hydro-thermal reaction, is cooled to room temperature；After reactant in reaction kettle is cleaned, filtered and dried, final composite negative pole material Co is made X SnO 4 , wherein 2 ＜ x ＜ 3.The preparation method of the composite negative pole material of lithium ion battery provided by the invention, simple and practicable, controllability is high, and cycle performance and high rate performance are excellent. |