2納米復(fù)合物。結(jié)果表明：微波輔助法能夠在商用銳鈦礦型TiO2納米顆粒表面均勻制備石墨烯納米片，通過SiO2/Si的劇烈電暈放電，其制備時(shí)間僅需數(shù)分鐘（最短3 min）。石墨烯納米片的尺寸大約為50 nm且缺陷很少。TiO2晶體結(jié)構(gòu)仍為銳鈦礦型，主要?dú)w功于極短的制備周期和較低的反應(yīng)溫度（600~700 ℃）。石墨烯具有優(yōu)異的電導(dǎo)率，可以提升鋰離子擴(kuò)散速率、提高電子傳輸速率并降低接觸電阻。在1 C（170 mA·g-1）條件下石墨烯/TiO2納米復(fù)合物的電池放電比容量提高了2倍。與商業(yè)化銳鈦礦型TiO2納米顆粒相比，在1 C到5 C的不同充放電倍率下，石墨烯/TiO2納米復(fù)合物的比容量差距顯著擴(kuò)大。;Through the modified household microwave oven system, the graphene-based nanocomposites were in-situ and efficiently synthesized. Results show that the graphene nanosheets can be uniformly generated on the surface of the commercial anatase TiO2 nanoparticles by microwave-assisted method in a few minutes (the minimum duration is 3 min) through the acute corona discharge of SiO2/Si. The size of graphene nanosheet is about 50 nm, and few defects can be observed. The crystal structure of anatase TiO2 remains due to the short production period and low synthesis temperature (600~700 °C). The excellent electrical conductivity of graphene can improve the Li ion diffusion and the electron transport, and decrease the contact resistance at the interface of electrode/electrolyte. The as-prepared graphene/TiO2 nanocomposite electrode shows a two-fold increase of capacity with good cycling stability under the condition of 1 C (170 mA·g-1), compared with the traditional TiO2 nanoparticles. The specific capacity gap of graphene/TiO2 nanocomposite is substantially widened under different charge-discharge rates (1~5 C), compared with that of the commercial anatase TiO2 nanoparticles."/>
2納米復(fù)合物;微波輔助;電暈放電;原位制備;鋰離子電池;graphene/TiO2 nanocomposites;microwave-assisted;corona discharge;in-situ synthesis;Li-ion batteries"/>