TITLE

Electrochemical properties of cathode materials LiNi1-yCoyO2 synthesized using various starting materials

AUTHOR(S)
Song, M. Y.; Rim, H.; Bang, E.
PUB. DATE
April 2004
SOURCE
Journal of Applied Electrochemistry;Apr2004, Vol. 34 Issue 4, p383
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
LiNi1-yCoyO2 samples were synthesized at 800 °C and 850 °C, by the solid-state reaction method, using the starting materials LiOH·H2O, Li2CO3, NiO, NiCO3, Co3O4 and CoCO3. The LiNi1-yCoyO2 synthesized using Li2CO3, NiO and Co3O4 exhibited the α-NaFeO2 structure of the rhombohedral system (space group R\overline{3}mrpar;. As the Co content increased, the lattice parameters a and c decreased. The reason is that the radius of the Co ion is smaller than that of the Ni ion. The increase in c/a shows that a two-dimensional structure develops better as the Co content increases. The LiNi0.7Co0.3O2 synthesized at 800 °C using LiOH · H2O, NiO and Co3O4 exhibited a larger first discharge capacity of 162 mAh g-1 than the other samples. The cycling performances of the samples with the first discharge capacity larger than 150 mAh g-1 were investigated. LiNi0.9Co0.1O2 synthesized at 850 °C using Li2CO3, NiO and Co3O4 showed excellent cycling performance. Samples with larger first discharge capacity will have a greater tendency for lattice destruction due to expansion and contraction during intercalation and deintercalation, than samples with smaller first discharge capacity. As the first discharge capacity increases, the capacity fading rate thus increases.
ACCESSION #
16781909

 

Related Articles

  • Crystal structures of the octahedral rhenium cluster compexes Cs4[Re6S8(OH)6]·6H2O and Cs4[Re6Se8(OH)6]·8H2O. Brylev, K. A.; Mironov, Yu. V.; Kim, S.-J.; Fedorov, V. E. // Journal of Structural Chemistry;Nov2007, Vol. 48 Issue 6, p1118 

    The salts Cs4[Re6S8(OH)6]·6H2O ( 1) and Cs4[Re6Se8(OH)6]·8H2O ( 2) were obtained by the reactions of Re6S8Br2 and Re6Se8Br2 with a CsOH melt with further solution of the products in water and crystallization of 1 and 2 from the aqueous solutions. The structure of the compounds was...

  • Synthesis, Crystal Structure and Luminescent Property of Cd (II) Complex with N-Benzenesulphonyl-L-leucine. Xishi Tai; Jinhe Jiang // Materials (1996-1944);Sep2012, Vol. 5 Issue 9, p1626 

    A new trinuclear Cd (II) complex [Cd3(L)6(2,2-bipyridine)3] [L = N-phenylsulfonyl-L-leucinato] has been synthesized and characterized by elemental analysis, IR and X-ray single crystal diffraction analysis. The results show that the complex belongs to the orthorhombic, space group P212121 with a...

  • Electrochemical detection of large channels in porous rocks. Engblom, S.O.; Myland, J.C.; Oldham, K.B.; Taylor, A.L.; Topic, W.C. // Journal of Applied Electrochemistry;Jan2003, Vol. 33 Issue 1, p51 

    An electrochemical method for studying channels in porous rocks and similar insulators, has been developed. In principle, the method consists of displacing a nonconducting liquid from the pores by an inflow of an ionically conducting solution. The conductance is monitored continually as the rate...

  • Editorial. Wragg, A. A. // Journal of Applied Electrochemistry;Jul2008, Vol. 38 Issue 7, p881 

    The article discusses the subject of articles published within the issue, which refers to the papers from the conference GEI-ERA 2007 on environmental and energy related issues in electrochemistry.

  • Instructions for Authors.  // Journal of Applied Electrochemistry;Jan2003, Vol. 33 Issue 1, p131 

    Provides information about the "Journal of Applied Electrochemistry." Aims and scope of the journal; Instructions in submitting manuscripts; Instructions in presenting manuscripts.

  • New Features in EXPO2007, a Program for Crystal Structure Resolution from Powder Data. Altomare, Angela; Cuocci, Corrado; Giacovazzo, Carmelo; Moliterni, Anna; Rizzi, Rosanna // Croatica Chemica Acta;Jun2008, Vol. 81 Issue 2, p401 

    New approaches have been introduced in the EXPO2007 program aiming at making easier and straightforward the ab initio crystal structure solution from powder diffraction data. Improvements in space group determination, powder pattern decomposition, least squares Fourier recycling, interpretation...

  • Kentuckia: A 4,6,8-connected tetragonal structural pattern in space group P4/ nmm. Bucknum, M. J.; Castro, E. A. // Russian Journal of General Chemistry;Feb2006, Vol. 76 Issue 2, p265 

    The crystal structure of a novel, hypothetical 4,6,8-connected tetragonal structural pattern with the ternary stoichiometry ABC 2 is described. The novel pattern belongs to the P4/ nmm space group (no. 129). It possesses the Wells point symbol (44(412612)(412)2 and has the Wellsean Schläfli...

  • Dislocation Creep of Single-Crystalline L12-Superlattice Intermetallic Compounds. Solov'eva, Yu.; Burtsev, B.; Starenchenko, V. // Russian Physics Journal;Sep2005, Vol. 48 Issue 9, p919 

    The creep phenomenon observed in ordered alloys and intermetallics with the L12-superlattice structure are considered. A mathematical model that accounts for the superlattice dislocation locking mechanisms at work during creep of the single crystals is constructed. Superposition of the thermal...

  • Systematization of 2D representations using point groups as an example. Sannikov, D. // Crystallography Reports;Nov2008, Vol. 53 Issue 6, p911 

    All types of mathematically irreducible (three types) and physically irreducible (three types) 2D representations of point symmetry groups (crystalline and magnetic classes) are enumerated. Tables of transformations of the base functions and their pair products for all types are compiled. It is...

  • Observable estimation of bipartite mixed-state entanglement. Yu, C. S.; Ma, K. H.; Song, H. S. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Apr2010, Vol. 56 Issue 3, p431 

    An analytic lower bound is presented for bipartite mixed-state entanglement which is obtained from convex roof construction of a variational definition of pure-state negativity. It is shown that this lower bound can be directly measured by one single projection operator or a few local...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics