Three-dimensionally macroporous graphene-supported Fe_3O_4 composite as anode material for Li-ion batteries with long cycling life and ultrahigh rate capability  

作　　者：Delong Ma Shuang Yuan Zhanyi Cao 

机构地区：[1]Key Laboratory of Automobile Materials of Ministry of Education,School of Materials Science and Engineering,Jilin University [2]State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences

出　　处：《Chinese Science Bulletin》2014年第17期2017-2023,共7页

基　　金：supported by the Program of ‘‘One Hundred Talents People’’ of the Chinese Academy of Sciences;the National Basic Research Program of China (2012CB215500);the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (20921002);the National Natural Science Foundation of China (21101147);the Jilin Provincial Science and Technology Development Program (20100102,20116008)

摘　　要：Fe3O4 is an attractive conversion reactionbased anode material with high theoretical capacity(928 mA h g-1).However,the poor cycling and rate performance hinder its applications in Li-ion batteries.In this work,we report an effective strategy to synthesize threedimensionally macroporous graphene-supported Fe3O4hybrid composite.Benefiting from advantage of the special structure,the hybrid composite exhibits excellent Li+ storage performance,delivering a high reversible capacity of980 mA h g-1at the current density of 4 A g-1even after470 cycles and ultrahigh rate capability(293 mA h g-1even at current density of 20 A g-1).Fe3O4 is an attractive conversion reaction- based anode material with high theoretical capacity （928 mA h g^-1）. However, the poor cycling and rate per- formance hinder its applications in Li-ion batteries. In this work, we report an effective strategy to synthesize three- dimensionally macroporous graphene-supported Fe3O4 hybrid composite. Benefiting from advantage of the special structure, the hybrid composite exhibits excellent Li^＋ stor- age performance, delivering a high reversible capacity of 980 mA h g^-1at the current density of 4 A g^-1 even after 470 cycles and ultrahigh rate capability （293 mA h g^- 1 even at current density of 20 A g^-1）.

关 键 词：混杂复合材料 锂离子电池 四氧化三铁 高速率 循环寿命 正极材料 能力 石墨 

分 类 号：TM912[电气工程—电力电子与电力传动] TB333[一般工业技术—材料科学与工程]