Improving the electrochemical performance of LiMn2O4/graphite batteries using LiF additive during fabrication

稀有金属（英文版）, 2011, 30(2): 120-125. doi: 10.1007/s12598-011-0209-5

^1, , ^2, , ^3, , ^4,

1.School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China;School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

2.School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China

3.School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China

4.School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China

基金项目: the Advanced Person Fund of Jiangsu University(10JDG041) the Major State Basic Research Development Program of China(2007CB613607)

Improving the electrochemical performance of LiMn2O4/graphite batteries using LiF additive during fabrication

LIU Yunjian ^1, , GUO Huajun ^2, , LI Xinhai ^3, , WANG Zhixing ^4,

1.School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China;School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

2.School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China

3.School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China

4.School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China

Keywords： lithium batteries

LiMn2O4/grdphite batteries using LiF additive were fabricated and their electrochemical performance including discharge,cycling and storage performances were tested and compared with LiF-free LiMn2O4/graphite batteries.The LiMn2O4/graphite battery with LiF added shows better capacity(107.5 mAh/g),cycling performance(capacity retention ratio of 93% after 100 cycles),and capacity recovery ratio(98.1%)than the LiF-free battery.The improvement in electrochemical performance of the LiF-added LiMn2O4/graphite battery was due to the fact that LiF can restrain the dissolution of Mn from the spinel LiMn2O4 cathode into the electrolyte,leading to a smaller resistance and polarization.

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