High Performance Lithium-Ion Battery Using Graphene Net Electrode

• Published in: ECS transactions 2013-01, Vol.50 (26), p.129-135
• Main Authors: Yamakaji, Masaki, Todoriki, Hiroatsu, Ikenuma, Tatsuya, Saito, Yumiko, Yukawa, Mikio, Yatabe, Rika, Momo, Junpei, Moriwaka, Tamae, Nanba, Kenryo, Takahashi, Minoru, Yamazaki, Shunpei
• Format: Article
• Language: English
• ISSN: 1938-5862; 1938-6737
• DOI: 10.1149/05026.0129ecst

An electrode using graphene oxide as a conductive additive exhibits high power and high energy density because graphene oxide has high dispersibility and forms conductive paths easily, compared with graphene and other carbon materials like acetylene black. Graphene oxide also shows the same effect as carbon coating when used as a conductive additive in a LiFePO4 electrode. In this work the LiFePO4 electrode using graphene oxide succeeds in exhibiting discharge capacities of 150 mAh/g at discharge rate of 170 mA/g (1 C). In addition, the LiFePO4 electrode using graphene oxide enables a reduction in carbon materials, because GO exhibits the effect as a conductive additive even in small amounts and does not require carbon coating of LiFePO4. This leads to an increase in the capacity of electrode. Thus, graphene oxide is effective in providing a LiFePO4 electrode having both high power and high energy density.