Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5149119 | Journal of Power Sources | 2017 | 7 Pages |
Abstract
The rate performances of Li batteries are severely influenced by the electrochemical properties of anode material. The graphite foams (GFms) is prepared by simple process from mesophase pitch (MP) precursor. The physical and electrochemical properties are investigated for Li secondary battery anode. The rate performances of GFms anode cell is more than 92% at the 30Â C-rate compare to 1Â C-rate current, which is very promising to the high power applications such as electric vehicles. For the quantitative analysis of rate capability improvement, the charge transfer resistance and diffusivity are measured by microelectrode system with single particle and galvanostatic intermittent titration technique (GITT). The diffusion coefficient of GFms is in the range of 3.2Â ÃÂ 10â12 - 2.0Â ÃÂ 10â9Â cm2/s, which is 2 orders higher than that of commercialized graphite anodes.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Sunghyun Lim, Ji-Hyun Kim, Yuto Yamada, Hirokazu Munakata, Young-Seak Lee, Sung-Soo Kim, Kiyoshi Kanamura,