Electrochemical study on lithium iron phosphate/hard carbon lithium-ion batteries

The electrochemical performances of lithium iron phosphate (LiFePO4), hard carbon (HC) materials, and a full cell composed of these two materials were studied. Both positive and negative electrode materials and the full cell were characterized by scanning electron microscopy, transmission electron microscopy, charge–discharge tests, and alternating current (a.c.) impedance techniques. Experimental results show that the LiFePO4/HC full cell exhibits a gradually decreased cell voltage, and it is capable of delivering a reversible discharge capacity of 122.1 mAh g−1 at 0.2-C rate. At the higher rate of 10 C, the efficiency of the full cell remains almost unchanged from that of 0.2 C. Furthermore, the LiFePO4/HC battery demonstrated a long life of 2,450 cycles with 40% of capacity change at a 10-C high rate. The internal resistance of the full cell is rather low as it is revealed from a.c. impedance measurements. These properties make the LiFePO4/HC battery an attractive option for high rate and long cycle life power applications.

[1]  Dinh Vinh Do,et al.  Thermal modeling of a cylindrical LiFePO4/graphite lithium-ion battery , 2010 .

[2]  J. Dahn,et al.  On the Reduction of Lithium Insertion Capacity in Hard‐Carbon Anode Materials with Increasing Heat‐Treatment Temperature , 1998 .

[3]  Liquan Chen,et al.  Nano-Sn/hard carbon composite anode material with high-initial coulombic efficiency , 2008 .

[4]  A. Mauger,et al.  Nanoscopic scale studies of LiFePO4 as cathode material in lithium-ion batteries for HEV application , 2007 .

[5]  Liquan Chen,et al.  Monodispersed hard carbon spherules with uniform nanopores , 2001 .

[6]  K. Zaghib,et al.  Vapor-grown carbon fiber anode for cylindrical lithium ion rechargeable batteries , 1999 .

[7]  Gang Liu,et al.  Influence of AlF3 coating on the electrochemical properties of LiFePO4/graphite Li-ion batteries , 2009 .

[8]  K. Zaghib,et al.  LiFePO4 and graphite electrodes with ionic liquids based on bis(fluorosulfonyl)imide (FSI)-for Li-ion batteries , 2008 .

[9]  J. Shim,et al.  Electrochemical analysis for cycle performance and capacity fading of a lithium-ion battery cycled at elevated temperature , 2002 .

[10]  Jianjun Li,et al.  Hard carbon/lithium composite anode materials for Li-ion batteries , 2007 .

[11]  R. Kanno,et al.  Structure Characterization and Lithiation Mechanism of Nongraphitized Carbon for Lithium Secondary Batteries , 2006 .

[12]  Karim Zaghib,et al.  LiFePO4/polymer/natural graphite: low cost Li-ion batteries , 2004 .

[13]  Hong Wang,et al.  Preparation and characterization of Na-doped LiFePO4/C composites as cathode materials for lithium-ion batteries , 2010 .

[14]  Jianling Li,et al.  Electrochemical performance of LiFePO4 modified by pressure-pulsed chemical vapor infiltration in lithium-ion batteries , 2007 .

[15]  Y. Nishi,et al.  Lithium-ion rechargeable cells with LiCoO2 and carbon electrodes , 1993 .

[16]  N Terada,et al.  Development of lithium batteries for energy storage and EV applications , 2001 .

[17]  A. Jaiswal,et al.  Nanoscale LiFePO4 and Li4Ti5O12 for High Rate Li-ion Batteries , 2009 .

[18]  A. Kawakami,et al.  Low-crystallized carbon materials for lithium-ion secondary batteries , 1997 .

[19]  K. Amine,et al.  High-temperature storage and cycling of C-LiFePO4/graphite Li-ion cells , 2005 .

[20]  Yoji Sakurai,et al.  Reaction behavior of LiFePO4 as a cathode material for rechargeable lithium batteries , 2002 .

[21]  J. Dahn,et al.  Li-insertion in hard carbon anode materials for Li-ion batteries , 1999 .

[22]  J. Dahn,et al.  Mechanism of lithium insertion in hard carbons prepared by pyrolysis of epoxy resins , 1996 .

[23]  J. Dahn,et al.  Reduction of the Irreversible Capacity in Hard‐Carbon Anode Materials Prepared from Sucrose for Li‐Ion Batteries , 1998 .

[24]  Jianjun Li,et al.  Hard carbon/Li2-6Co0.4N composite anode materials for Li-ion batteries , 2006 .

[25]  K. S. Nanjundaswamy,et al.  Phospho‐olivines as Positive‐Electrode Materials for Rechargeable Lithium Batteries , 1997 .

[26]  Yoshinori Kida,et al.  Electrochemical characteristics of graphite, coke and graphite/coke hybrid carbon as negative electrode materials for lithium secondary batteries , 2001 .

[27]  Lijun Gao,et al.  Li4Ti5O12/C composite electrode material synthesized involving conductive carbon precursor for Li-ion battery , 2009 .

[28]  L. J. Fu,et al.  Doping effects of zinc on LiFePO4 cathode material for lithium ion batteries , 2006 .