Electrochemical deposition and modification of LiFePO4 for the preparation of cathode with enhanced battery performance

被引:50
作者
Eftekhari, A [1 ]
机构
[1] Electrochem Res Ctr, Tehran, Iran
关键词
D O I
10.1149/1.1795544
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
LiFePO4 was deposited onto substrate surface during Au electrodeposition. Formation of this LiFePO4/Au mixed film leads to better electrochemical performance of the LiFePO4, because Au modifies its low conductivity. This simple electrochemical method also provides an opportunity for the incorporation of modifying materials such as metal oxides during a mixed-metal codeposition process. Interestingly, it is possible to use a similar method to coat the electroactive material surface with modifier. After the deposition of the electroactive film, a thin layer of metal oxide was additionally coated on the film surface. The results obtained from the experimental investigations show that the LiFePO4 cathode prepared by the simple electrochemical method proposed has an excellent battery performance, including higher specific capacity, less capacity fading, and faster diffusion process. The LiFePO4 cathode prepared shows only a 10% capacity fading after 1000 cycles at 80degreesC, while approaching its theoretical capacity at this condition. (C) 2004 The Electrochemical Society.
引用
收藏
页码:A1816 / A1819
页数:4
相关论文
共 19 条
[1]   Novel LiCoO2 cathode material with Al2O3 coating for a Li ion cell [J].
Cho, J ;
Kim, YJ ;
Park, B .
CHEMISTRY OF MATERIALS, 2000, 12 (12) :3788-3791
[2]   A novel concept for the synthesis of an improved LiFePO4 lithium battery cathode [J].
Croce, F ;
D'Epifanio, A ;
Hassoun, J ;
Deptula, A ;
Olczac, T ;
Scrosati, B .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2002, 5 (03) :A47-A50
[3]   THERMAL-STABILITY OF LIXCOO2, LIXNIO2 AND LAMBDA-MNO2 AND CONSEQUENCES FOR THE SAFETY OF LI-ION CELLS [J].
DAHN, JR ;
FULLER, EW ;
OBROVAC, M ;
VONSACKEN, U .
SOLID STATE IONICS, 1994, 69 (3-4) :265-270
[4]   Aluminum oxide as a multi-function agent for improving battery performance of LiMn2O4 cathode [J].
Eftekhari, A .
SOLID STATE IONICS, 2004, 167 (3-4) :237-242
[5]   Potassium secondary cell based on Prussian blue cathode [J].
Eftekhari, A .
JOURNAL OF POWER SOURCES, 2004, 126 (1-2) :221-228
[6]   Electrochemical performance and cyclability of LiFe0.5Mn1.5O4 as a 5 V cathode material for lithium batteries [J].
Eftekhari, A .
JOURNAL OF POWER SOURCES, 2003, 124 (01) :182-190
[7]   3D deposition of LiMn2O4:: enhancement of lithium battery performance [J].
Eftekhari, A .
SOLID STATE IONICS, 2003, 161 (1-2) :41-47
[8]   On the fractal study of LiMn2O4 electrode surface [J].
Eftekhari, A .
ELECTROCHIMICA ACTA, 2003, 48 (19) :2831-2839
[9]   Mixed-metals codeposition as a novel method for the preparation of LiMn2O4 electrodes with reduced capacity fades [J].
Eftekhari, A .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (07) :A966-A969