The discharge rate capability of rechargeable Li–O2 batteries

The O2electrode in Li–O2cells was shown to exhibit gravimetric energy densities (considering the total weight of oxygen electrode in the discharged state) four times that of LiCoO2 with comparable gravimetric power. The discharge rate capability of Au-catalyzed Vulcan carbon and pure Vulcan carbon (VC) as the O2electrode was studied in the range of 100 to 2000 mA gcarbon−1. The discharge voltage and capacity of the Li−O2 cells were shown to decrease with increasing rates. Unlike propylene carbonate based electrolytes, the rate capability of Li−O2 cells tested with 1,2-dimethoxyethane was found not to be limited by oxygen transport in the electrolyte. X-Ray diffraction (XRD) showed lithium peroxide as the discharge product and no evidence of Li2CO3 and LiOH was found. It is hypothesized that higher discharge voltages of cells with Au/C than VC at low rates could have originated from higher oxygen reduction activity of Au/C. At high rates, higher discharge voltages with Au/C than VC could be attributed to faster lithium transport in nonstoichiometric and defective lithium peroxide formed upon discharge, which is supported by XRD and X-ray absorption near edge structure O and Li K edge data.

[1]  M. Whittingham,et al.  Lithium batteries and cathode materials. , 2004, Chemical reviews.

[2]  Petru Andrei,et al.  Some Possible Approaches for Improving the Energy Density of Li-air Batteries , 2010 .

[3]  Hubert A. Gasteiger,et al.  Instability of Pt ∕ C Electrocatalysts in Proton Exchange Membrane Fuel Cells A Mechanistic Investigation , 2005 .

[4]  Sanjeev Mukerjee,et al.  Elucidating the Mechanism of Oxygen Reduction for Lithium-Air Battery Applications , 2009 .

[5]  J. Jorné,et al.  PEM Fuel Cell Operation at − 20 ° C . I. Electrode and Membrane Water (Charge) Storage , 2008 .

[6]  H. Gasteiger,et al.  Electrocatalytic Activity Studies of Select Metal Surfaces and Implications in Li-Air Batteries , 2010 .

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

[8]  Smith,et al.  X-ray-absorption studies of Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O films at oxygen K edge by means of fluorescence and total electron yield: A comparison of two techniques. , 1990, Physical review. B, Condensed matter.

[9]  Hitoshi Yamamoto,et al.  Investigation of the solution condition of lithium electrolyte solutions with LiCF3SO3 salt , 2000 .

[10]  Hubert A. Gasteiger,et al.  The Influence of Catalysts on Discharge and Charge Voltages of Rechargeable Li–Oxygen Batteries , 2010 .

[11]  Shuo Chen,et al.  Platinum-gold nanoparticles: a highly active bifunctional electrocatalyst for rechargeable lithium-air batteries. , 2010, Journal of the American Chemical Society.

[12]  S. S. Sandhu,et al.  Diffusion-limited model for a lithium/air battery with an organic electrolyte , 2007 .

[13]  K. M. Abraham,et al.  A Polymer Electrolyte‐Based Rechargeable Lithium/Oxygen Battery , 1996 .

[14]  Jean-Marie Tarascon,et al.  From biomass to a renewable LixC6O6 organic electrode for sustainable Li-ion batteries. , 2008, ChemSusChem.

[15]  Ben Wang,et al.  Lithium–Air Batteries Using SWNT/CNF Buckypapers as Air Electrodes , 2010 .

[16]  Peter G Bruce,et al.  Alpha-MnO2 nanowires: a catalyst for the O2 electrode in rechargeable lithium batteries. , 2008, Angewandte Chemie.

[17]  B. L. Henke,et al.  X-Ray Interactions: Photoabsorption, Scattering, Transmission, and Reflection at E = 50-30,000 eV, Z = 1-92 , 1993 .

[18]  Jeffrey Read,et al.  Discharge characteristic of a non-aqueous electrolyte Li/O2 battery , 2010 .

[19]  Mark F. Mathias,et al.  Electrochemistry and the Future of the Automobile , 2010 .

[20]  Doron Aurbach,et al.  The electrochemistry of noble metal electrodes in aprotic organic solvents containing lithium salts , 1991 .

[21]  B. McCloskey,et al.  Lithium−Air Battery: Promise and Challenges , 2010 .

[22]  Jigang Zhou,et al.  Electronic structure of TiO2nanotube arrays from X-ray absorption near edge structure studies , 2009 .

[23]  J. Goodenough.  Challenges for Rechargeable Li Batteries , 2010 .

[24]  Matthew H. Ervin,et al.  Oxygen Transport Properties of Organic Electrolytes and Performance of Lithium/Oxygen Battery , 2003 .

[25]  Keith Scott,et al.  Carbon-supported manganese oxide nanocatalysts for rechargeable lithium–air batteries , 2010 .

[26]  J. Nørskov,et al.  Communications: Elementary oxygen electrode reactions in the aprotic Li-air battery. , 2010, The Journal of chemical physics.

[27]  Y. Aihara,et al.  Ion and solvent diffusion and ion conduction of PC-DEC and PC-DME binary solvent electrolytes of LiN(SO2CF3)2 , 2004 .

[28]  Jeffrey Read,et al.  Characterization of the Lithium/Oxygen Organic Electrolyte Battery , 2002 .

[29]  Hubert A. Gasteiger,et al.  Method Development to Evaluate the Oxygen Reduction Activity of High-Surface-Area Catalysts for Li-Air Batteries , 2011 .

[30]  P. Bruce,et al.  An O2 cathode for rechargeable lithium batteries: The effect of a catalyst , 2007 .

[31]  Fuminori Mizuno,et al.  Rechargeable Li-Air Batteries with Carbonate-Based Liquid Electrolytes , 2010 .

[32]  M. Yoshio,et al.  Conductivities of 1,2-dimethoxyethane or 1,2-dimethoxyethane-related solutions of lithium salts , 1993 .

[33]  Wu Xu,et al.  High Capacity Pouch-Type Li–Air Batteries , 2010 .