▎ 摘　　要

NOVELTY - A spherical hollow lithium titanate/graphene composite material preparing method involves mixing tetraethyl orthosilicate and ammonium hydroxide, adding waterglass to obtain solid phase silicon dioxide ball. The silicon ball is dispersed, added with tetrabutyl titanate, heated and centrifuged to obtain solid phase silica titanium ball. The titanium ball is dispersed in ethanol, added with lithium hydroxide solution, washed and dried. The spherical hollow lithium titanate is dispersed, added to graphene oxide, followed by taking solid phase, drying and calcining to obtain the finished product. USE - Method for preparing spherical hollow lithium titanate/graphene composite material that is utilized as lithium battery cathode material. ADVANTAGE - The method enables preparing composite material with good uniformity, good crystallinity, improved internal hollow structure, good surface area, increased contact area and improved charging-discharging performance. DETAILED DESCRIPTION - A spherical hollow lithium titanate/graphene composite material preparing method involves mixing tetraethyl orthosilicate and ammonium hydroxide, allowing the reaction for 5-10 minutes, adding waterglass, allowing reaction for 2 hours to obtain reaction product. The reaction product is centrifuged and separated to obtain solid phase silicon dioxide ball. The solid phase silicon dioxide ball is dispersed in an aqueous solution of ethanol, added with tetrabutyl titanate under stirring, heated and centrifuged to obtain solid phase silica titanium ball. The solid phase silica titanium ball is dispersed in anhydrous ethanol, added with aqueous lithium hydroxide solution, subjected for high-temperature hydrothermal reaction, washed with water, dispersed ultrasonically and dried to obtain spherical hollow lithium titanate. The spherical hollow lithium titanate is dispersed in deionized water, added to graphene oxide, stirred, centrifuged, followed by taking the solid phase, drying in vacuum and calcining at high-temperature under argon gas atmosphere to obtain the finished product.