The effect of pressure on the electroanalytical response of graphite anodes and LiCoO2 cathodes for Li-ion batteries

The effect of the application of pressure during the preparation of composite flaky synthetic graphite anodes and LiCoO2 cathodes on their electrochemical behavior in Li insertion and de-insertion processes was studied using voltammetry, chronopotentiometry, electrochemical impedance spectroscopy (EIS), and ex situ AFM imaging. Unpressurized graphite electrodes reach a higher capacity and have faster kinetics than the same electrodes compressed or rolled at 5 × 10 3 kg cm − 3 . In contrast, the performance of rolled or compressed LiCoO2 electrodes in terms of capacity and kinetics was better than the performance of the unpressed electrodes. AFM imaging of pristine and cycled electrodes demonstrated a pronounced effect of pressure on the morphology of graphite electrodes, whereas the impact of pressure on the morphology of LiCoO2 electrodes was found to be much less pronounced. It was concluded that compressing graphite electrodes has an adverse effect on the contact between the active mass and ions in solution, while compressing LiCoO2 electrodes does not adversely affect the contact between solution species and the active mass, but rather, improves inter-particle electrical contact. © 2001 Elsevier Science B.V. All rights reserved.

[1]  Doron Aurbach,et al.  Solid‐State Electrochemical Kinetics of Li‐Ion Intercalation into Li1 − x CoO2: Simultaneous Application of Electroanalytical Techniques SSCV, PITT, and EIS , 1999 .

[2]  D. Aurbach,et al.  Frumkin intercalation isotherm — a tool for the description of lithium insertion into host materials: a review , 1999 .

[3]  Doron Aurbach,et al.  A Comparative Study of Synthetic Graphite and Li Electrodes in Electrolyte Solutions Based on Ethylene Carbonate‐Dimethyl Carbonate Mixtures , 1996 .

[4]  J. Fischer,et al.  Effect of morphology and texture on electrochemical properties of graphite anodes , 1997 .

[5]  D. Aurbach,et al.  SIMULTANEOUS MEASUREMENTS AND MODELING OF THE ELECTROCHEMICAL IMPEDANCE AND THE CYCLIC VOLTAMMETRIC CHARACTERISTICS OF GRAPHITE ELECTRODES DOPED WITH LITHIUM , 1997 .

[6]  M. Fujimoto,et al.  Electrochemical behaviour of carbon electrodes in some electrolyte solutions , 1996 .

[7]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[8]  J. Tarascon,et al.  The use of acetates as precursors for the low-temperature synthesis of LiMn2O4 and LiCoO2 intercalation compounds , 1991 .

[9]  Doron Aurbach,et al.  On the correlation between surface chemistry and performance of graphite negative electrodes for Li ion batteries , 1999 .

[10]  P. Novák,et al.  Graphites for lithium-ion cells : The correlation of the first-cycle charge loss with the Brunauer-Emmett-Teller surface area , 1998 .

[11]  J. Barker,et al.  Structure and Lithium Intercalation Properties of Synthetic and Natural Graphite , 1996 .

[12]  H. Fujimoto,et al.  Charge-discharge mechanism of graphitized mesocarbon microbeads , 1995 .

[13]  M. Endo,et al.  A Mechanism of Lithium Storage in Disordered Carbons , 1994, Science.

[14]  Doron Aurbach,et al.  The dependence of the performance of Li-C intercalation anodes for Li-ion secondary batteries on the electrolyte solution composition , 1994 .

[15]  Dominique Guyomard,et al.  The Li1+xMn2O4/C rocking-chair system: a review , 1993 .

[16]  R. Yazami,et al.  High performance LiCoO2 positive electrode material , 1995 .

[17]  Petr Novák,et al.  Insertion Electrode Materials for Rechargeable Lithium Batteries , 1998 .

[18]  D. Aurbach,et al.  Electrochemical and spectroscopic studies of carbon electrodes in lithium battery electrolyte systems , 1993 .

[19]  Madhav Datta,et al.  Energy storage systems for electronics , 2000 .

[20]  Young-Sik Hong,et al.  Synthesis and electrochemical properties of lithium cobalt oxides prepared by molten-salt synthesis using the eutectic mixture of LiCl-Li2CO3 , 2001 .

[21]  J. Fischer,et al.  Lithium Insertion in Disordered Carbon−Hydrogen Alloys: Intercalation vs Covalent Binding , 1996 .

[22]  Michikazu Hara,et al.  Structural and Kinetic Characterization of Lithium Intercalation into Carbon Anodes for Secondary Lithium Batteries , 1995 .

[23]  D. Aurbach,et al.  Common Electroanalytical Behavior of Li Intercalation Processes into Graphite and Transition Metal Oxides , 1998 .

[24]  Dahn,et al.  Phase diagram of LixC6. , 1991, Physical review. B, Condensed matter.

[25]  K. Zaghib,et al.  Effect of Graphite Particle Size on Irreversible Capacity Loss , 2000 .

[26]  E. Antolini.  Preparation and properties of LiCoO compounds , 1998 .

[27]  U. Chatterjee,et al.  Effect of unconventional feeds on production cost, growth performance and expression of quantitative genes in growing pigs , 2022, Journal of the Indonesian Tropical Animal Agriculture.