Electrochemical investigation of LiMn2O4 cathodes in gel electrolyte at various temperatures

被引:19
作者
Hjelm, AK
Eriksson, T
Lindbergh, G [1 ]
机构
[1] KTH, Royal Inst Technol, Dept Chem Engn & Technol, SE-10044 Stockholm, Sweden
[2] Angstrom Lab, SE-75121 Uppsala, Sweden
关键词
lithium batteries; LiMn2O4; cathode; gel electrolyte; temperature; activation energy;
D O I
10.1016/S0013-4686(02)00598-4
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A composite lithium battery electrode of LiMn2O4 in combination with a gel electrolyte (1 M LiBF4/24 wt% PMMA/1:1 EC:DEC) has been investigated by galvanostatic cycling experiments and electrochemical impedance spectroscopy (EIS) at various temperatures, i.e. -3 < T < 56 degreesC, For analysis of EIS data, a mathematical model taking into account local kinetics and potential distribution in the liquid phase within the porous electrode structure was used. Reasonable values of the double-layer capacitance, the exchange-current density and the solid phase diffusion were found as a function of temperature. The apparent activation energy of the charge-transfer ( similar to 65 kJ mol(-1)), the solid phase transfer ( similar to 45 kJ mol(-1)) and of the ionic bulk and effective conductance in the gel phase ( similar to 34 kJ mol(-1)), respectively, were also determined, The kinetic results related to ambient temperature were compared to those obtained in the corresponding liquid electrolyte. The incorporated PMMA was found to reduce the ionic conductivity of the free electrolyte, and it was concluded that the presence of 24 wt% PMMA does not have a significant influence on the kinetic properties of LiMn2O4. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:171 / 179
页数:9
相关论文
共 31 条
[1]   Polyacrylonitrile electrolyte-based Li ion batteries [J].
Abraham, KM ;
Choe, HS ;
Pasquariello, DM .
ELECTROCHIMICA ACTA, 1998, 43 (16-17) :2399-2412
[2]   Li+ conducting gel electrolyte for electrochromic windows [J].
Agnihotry, SA ;
Nidhi ;
Pradeep ;
Sekhon, SS .
SOLID STATE IONICS, 2000, 136 (136-137) :573-576
[3]   Lithium insertion into carbonaceous materials and transition metal oxides from high performance polymer electrolytes [J].
Appetecchi, GB ;
Croce, F ;
Marassi, R ;
Persi, L ;
Romagnoli, P ;
Scrosati, B .
ELECTROCHIMICA ACTA, 1999, 45 (1-2) :23-30
[4]   KINETICS AND STABILITY OF THE LITHIUM ELECTRODE IN POLY(METHYLMETHACRYLATE)-BASED GEL ELECTROLYTES [J].
APPETECCHI, GB ;
CROCE, F ;
SCROSATI, B .
ELECTROCHIMICA ACTA, 1995, 40 (08) :991-997
[5]   Polarizable continuum model for lithium interface transitions between a liquid electrolyte and an intercalation electrode [J].
Atanasov, M ;
Daul, C ;
Barras, JL ;
Benco, L ;
Deiss, E .
SOLID STATE IONICS, 1999, 121 (1-4) :165-174
[6]   Capacity fading of LixMn2O4 spinel electrodes studied by XRD and electroanalytical techniques [J].
Aurbach, D ;
Levi, MD ;
Gamulski, K ;
Markovsky, B ;
Salitra, G ;
Levi, E ;
Heider, U ;
Heider, L ;
Oesten, R .
JOURNAL OF POWER SOURCES, 1999, 81 :472-479
[7]   Common electroanalytical behavior of Li intercalation processes into graphite and transition metal oxides [J].
Aurbach, D ;
Levi, MD ;
Levi, E ;
Teller, H ;
Markovsky, B ;
Salitra, G ;
Heider, U ;
Heider, L .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1998, 145 (09) :3024-3034
[8]   GEL ELECTROLYTE FOR SOLID-STATE ELECTROCHROMIC CELL [J].
BOHNKE, O ;
ROUSSELOT, C ;
GILLET, PA ;
TRUCHE, C .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1992, 139 (07) :1862-1865
[9]  
CHOI YM, 1995, J POWER SOURCES, V56, P25, DOI 10.1016/0378-7753(95)80004-Z
[10]   Trends in polymer electrolytes for secondary lithium batteries [J].
Dias, FB ;
Plomp, L ;
Veldhuis, JBJ .
JOURNAL OF POWER SOURCES, 2000, 88 (02) :169-191