Fabrication of Porous Graphite Anodes with Pico-Second Pulse Laser and Enhancement of Pre-Doping of Li+ Ions to Laminated Graphite Anodes with Micrometre-Sized Holes Formed on the Porous Graphite Anodes

被引:23
作者
Tsuda, Takashi [1 ]
Ando, Nobuo [2 ]
Mitsuhashi, Naoto [1 ]
Tanabe, Toyokazu [1 ]
Itagaki, Kaoru [3 ]
Soma, Naohiko [3 ]
Nakamura, Susumu [4 ]
Hayashi, Narumi [5 ]
Matsumoto, Futoshi [1 ]
机构
[1] Kanagawa Univ, Dept Mat & Life Chem, Kanagawa Ku, 3-27-1 Rokkakubashi, Yokohama, Kanagawa 2218686, Japan
[2] Kanagawa Univ, Inst Engn Res, Kanagawa Ku, 3-27-1 Rokkakubashi, Yokohama, Kanagawa 2218686, Japan
[3] Wired Co Ltd, 1628 Hitotsuyashiki Shinden, Sanjo, Niigata 9591152, Japan
[4] Nagaoka Coll, Natl Inst Technol, Dept Elect & Elect Syst Engn, 888 Nishikatakai, Nagaoka, Niigata 9408532, Japan
[5] Ind Res Inst Niigata Prefecture, Chuo Ku, 1-11-1 Abuminishi, Niigata, Niigata 9500915, Japan
来源
SELECTED PROCEEDINGS FROM THE 231ST ECS MEETING | 2017年 / 77卷 / 11期
关键词
PERFORMANCE; PRELITHIATION;
D O I
10.1149/07711.1897ecst
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A process for fabricating porous graphite electrodes having an average pore diameter of 21 mu m and an open area of 1% was developed with a system constructed from a pico-second pulse laser and a polygon mirror. The fabricated porous graphite electrodes were used to evaluate the porous design on the graphite electrodes for exhibiting a higher Li+ pre-doping reaction (pre-lithiation) rate with cells in which graphite electrodes were laminated with separators and the laminated graphite electrodes opposite to a Li metal foil through a separator. The results in this study indicate that lithiation proceeds stepwise from the first electrode close to the Li foil to more distant electrodes. The transfer of Li+ ions controlled the lithiation because lithiation did not occur in areas of the electrodes that did not contain pores. In addition, the porous electrodes exhibited a much higher rate of lithiation when compared with electrodes that were prepared by coating a graphite layer on porous current collectors.
引用
收藏
页码:1897 / 1903
页数:7
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