Preparation of few-layer reduced graphene oxide-wrapped mesoporous Li4Ti5O12 spheres and its application as an anode material for lithium-ion batteries

摘要

A three-dimensional few-layer reduced graphene oxide-wrapped mesoporous Li_4Ti_5O_(12)(m-LTO@FLRGO) electrode is produced using a simple solution fabrication process.When tested as an anode for Liion batteries,the m-LTO@FL-RGO composite exhibits excellent rate capability and superior cycle life.The capacity of m-LTO@FL-RGO reaches 165.4 mA h g^(-1) after 100 cycles between 1 and 2.5 V at a rate of 1 C.Even at a rate of 30 C,a high discharge capacity of 115.1 mA h g^(-1) is still obtained,which is three times higher than the pristine mesoporous Li_4Ti_5O_(12)(m-LTO).The graphene nanosheets are incorporated into the m-LTO microspheres homogenously,which provide a high conductive network for electron transportation.