| abstract |
The invention relates to a method for preparing nanometer lithium titanate/graphene porous composite electrode material. The method directly mixes graphite oxide, titanium source and lithium source by ball milling, so that the titanium source and lithium source are inserted between the layers of graphite oxide, and nano-lithium titanate precursor particles are formed in situ under the action of interlayer functional groups, and the interlayer spacing is enlarged to The interaction force between layers is weakened, then the graphite oxide is peeled off by ball milling, and finally the nano-lithium titanate/graphene porous composite electrode material is obtained by high temperature sintering. The method uses graphite oxide dry powder instead of graphene oxide suspension as raw material, avoids the disadvantages of poor consistency and low concentration of graphene oxide suspension, and belongs to the solid-phase preparation process, has good repeatability, and has potential industrial application value. The nano-lithium titanate/graphene porous composite material synthesized by this method has excellent high rate performance, and still has a capacity of nearly 100mAh g -1 at a rate of 100C, reaching the international advanced level. |