WANG Qing , LUO Shaohua , ZHANG Yahui , WANG Zhiyuan , LIU Yanguo , HAO Aimin ,
WANG Wei , LIN Mingwei
(1. School of Materials Science and Engineering, Northeastern University, Shenyang 110004, Liaoning, China; 2. School of Resources
and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, Hebei, China; 3. Key Laboratory of Dielectric and
Electrolyte Functional Material Hebei Province, Qinhuangdao 066004, Hebei, China)
Abstract: The biomorphic hierarchical porous carbon was prepared from orange peels by high temperature pyrolysis, and its electrochemical perpromance was measured as anode for lithium ion battery. The results suggest that the samples prepared from orange peels were amorphous carbon, and possessed connected alveolate structures and specific surface area of 52 m2·g-1. The biomorphic hierarchical carbon was used as an anode for lithium ion batteries and delivered an initial specific discharge and charge capacities of 832 and 393 mAhg-1 at 100 mAg-1 with a coulombic efficiency of 47.2%. After 200 cycles the carbon anode retained a reversible capacity of 343 mAhg-1 with a coulombic efficiency above 95%. The high reversible capacity of 149 mAhg-1 was observed at the current density of 2 Ag-1, which was ascribed to the hierarchical porous structures of biomorphic carbon.
Key words: biomorphic materials; lithium ion batteries; hierarchical structures; anode materials