Preparation of straw porous carbon/graphite nanosheet composite and its electrochemical properties

Abstract

Straw porous carbon/graphite nanosheet composite (SPCG) was prepared by a hydrothermal method. The structures and morphologies of the material were characterized and analyzed. The surface of SPCG shows a tree-like support structure and a silk-like structure connected with a high specific surface area (1405 m2/g). The lithium storage performances of the material were studied. The first reversible specific capacity is 1136 mAh/g and initial coulomb efficiency is 63.5% at 100 mAh/g, the reversible specific capacity is 246 mAh/g after 200 cycles, which are better than those of straw porous carbon (SPC). The graphite nanosheet in the material can effectively improve the electrochemical performance of porous carbon materials. This study provided an effective way for the resource utilization of agricultural waste straw.