TITLE

Surface adsorption and disordering in LiFePO4 based battery cathodes

AUTHOR(S)
Kayyar, Archana; Haijun Qian; Jian Luo
PUB. DATE
November 2009
SOURCE
Applied Physics Letters;11/30/2009, Vol. 95 Issue 22, p221905
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A recent study [Kang and Ceder, Nature (London) 458, 190 (2009)] suggested that a Li4P2O7-like “fast ion-conducting surface phase” could form on the surfaces of LiFePO4 particles, enabling ultrafast discharging of Li-ion batteries. We demonstrate that these nanoscale surface films exhibit a self-selecting or “equilibrium” thickness, akin to those observed in simpler binary oxides [Luo and Chiang, Annu. Rev. Mater. Res. 38, 227 (2008)]. These observations can be interpreted as a case of coupled prewetting and premelting. Similar nanoscale intergranular films are also observed. These nanoscale interfacial phenomena can be utilized to tailor nanoparticles for battery and many other applications.
ACCESSION #
45610527

 

Related Articles

  • Aqueous processing of lithium-ion battery cathodes using hydrogen peroxide-treated vapor-grown carbon fibers for improvement of electrochemical properties. Jyh-Tsung Lee; Yung-Ju Chu; Fu-Ming Wang; Chang-Rung Yang; Chia-Chen Li // Journal of Materials Science;Dec2007, Vol. 42 Issue 24, p10118 

    The electrochemical behavior of aqueous processing lithium cobalt oxide (LiCoO2) cathodes used hydrogen peroxide (H2O2)-treated vapor-grown carbon fibers (VGCFs) as a conductive agent for lithium-ion batteries has been investigated and improved. The sedimentation experiments show that the...

  • Modifications for ab initio calculations of the moderately large-embedded-cluster model. Hydrogen adsorption on a lithium surface. Fukunishi, Yoshifumi; Nakatsuji, Hiroshi // Journal of Chemical Physics;11/1/1992, Vol. 97 Issue 9, p6535 

    The moderately large-embedded-cluster (MLEC) model of Grimley, Pisani, Ravenek, and others are modified so that the model is more easily applicable to ab initio calculations. We give a linewidth to each discrete energy level of a cluster for simulating the density of states of a bulk metal and...

  • A Green's-function perturbation theory for nonuniform semiflexible polymers: Phases and their transitions near attracting surfaces. Kuznetsov, Dmitri V.; Sung, Wokyung // Journal of Chemical Physics;9/22/1997, Vol. 107 Issue 12, p4729 

    The chain stiffness is an important characteristic that affects the properties of many biological and synthetic polymers. We develop a perturbation theory in the framework of a Green's-function approach to treat the chain stiffness effects systematically. This scheme incorporates the standard...

  • Adhesion forces between wetted solid surfaces. Charlaix, Elisabeth; Crassous, Jérôme // Journal of Chemical Physics;5/8/2005, Vol. 122 Issue 18, p184701 

    We investigate in this paper the influence of wetting films on the adhesion forces between macroscopic solid surfaces connected by a liquid bridge. We show that the capillary forces are dependent on the interactions governing the wetting layers, and that those interactions may be determined from...

  • Formation of the Energy State and Adsorption Capacity of the Surface of Nanodiamond Powders during Preparation. Bogatyreva, G.P.; Marinich, M.A.; Bazali&icaron;, G.A.; Ole&icaron;nik, N.A.; Ishchenko, E.V.; Gvyazdovskaya, V.L. // Physics of the Solid State;Apr2004, Vol. 46 Issue 4, p665 

    This paper reports on new results of the investigation into the energy state and adsorption capacity of the surface of nanodiamond powders.

  • Restructuring of the Pt3Sn(111) surfaces induced by atomic and molecular oxygen from first principles. Dupont, Céline; Jugnet, Yvette; Delbecq, Françoise; Loffreda, David // Journal of Chemical Physics;3/28/2009, Vol. 130 Issue 12, p124716 

    The surface restructuring of Pt3Sn(111) induced by oxygen chemisorption is examined by means of density-functional theory calculations. Molecular and atomic oxygen chemisorption is investigated on the two available terminations of the bulk alloy—(2×2) and...

  • Batteries Seek Higher Capacity, Power and Safely. Morrison, David // Power Electronics Technology;Oct2004, Vol. 30 Issue 10, p99 

    Presents developments relating to lithium-ion/lithium-polymer batteries. Discharge rates; Need to change the electrode composition to push battery performance higher; Gravimetric and volumetric energy density; Optimization of a familiar lithium-ion cell chemistry using lithium cobalt oxide as...

  • Surface modification of cathode materials for lithium ion batteries. Makhonina, E. V.; Dubasova, V. S.; Nikolenko, A. F.; Ponomareva, T. A.; Kisterev, E. V.; Pervov, V. S. // Inorganic Materials;Nov2009, Vol. 45 Issue 11, p1299 

    We have studied the effect of surface modification with aluminum hydroxide and alumina-boehmite mixtures on the electrochemical performance of an equimolar LiCoO2/LiMn2O4 composite cathode material. A process has been developed for the deposition of aluminum hydroxide nanocoatings using...

  • Li-LiFePO4 rechargeable polymer battery using dual composite polymer electrolytes. Sumathipala, H. H.; Hassoun, J.; Panero, S.; Scrosati, B. // Journal of Applied Electrochemistry;Jan2008, Vol. 38 Issue 1, p39 

    A composite polymer electrolyte, formed by dispersing into a poly(ethylene oxide)-lithium salt matrix two additives, i.e. calyx(6)pyrrole, (CP) acting as an anion trapper and superacid zirconia, S-ZrO2 acting as a conductivity promoter, has been tested as a separator in a new type of...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics