The Effects of Acid Treatment on the Electrochemical Properties of 0.5 Li2MnO3 ∙ 0.5 LiNi0.44Co0.25Mn0.31O2 Electrodes in Lithium Cells
作者： S.-H. Kang , C. S. Johnson , J. T. Vaughey , K. Amine , M. M. Thackeray
DOI: 10.1149/1.2194764
关键词:
摘要: The electrochemical properties of 0.5 Li 2 MnO 3 ·0.5 LiNi 0.4 Co 0.25 Mn 0.31 O electrodes, when preconditioned and activated with acid for 2-24 h, have been studied in lithium cells. Powder X-ray diffraction data measurements provide supporting evidence an intergrown, composite electrode structure from which can be leached the (Li ) component acid, thereby mimicking charge process at high potentials (>4.5 V). -rich domains generated by treatment are reduced during discharge a lower potential than electrochemically domains. With prolonged cycling between 4.6 2.0 V, dQ/dV plots untreated acid-treated electrodes develop similar, but not identical, character, suggesting coalescence redox interaction manganese ions Ni 0.44 regions structure. Acid eliminates first-cycle capacity loss consistent earlier reports related systems, it damages their stability rate capability.
harvard.edu
ecsdl.org参考文章(26)
W. C. Hamilton, J. A. Ibers, Structures of HCrO2 and DCrO2 Acta Crystallographica. ,vol. 16, pp. 1209- 1212 ,(1963) , 10.1107/S0365110X63003182
Yuan Gao, K. Myrtle, Meijie Zhang, J. N. Reimers, J. R. Dahn, VALENCE BAND OF LINIXMN2-XO4 AND ITS EFFECTS ON THE VOLTAGE PROFILES OF LINIXMN2-XO4/LI ELECTROCHEMICAL CELLS Physical Review B. ,vol. 54, pp. 16670- 16675 ,(1996) , 10.1103/PHYSREVB.54.16670
Lianqi Zhang, Kazunori Takada, Narumi Ohta, Katsutoshi Fukuda, Minoru Osada, Lianzhou Wang, Takayoshi Sasaki, Mamoru Watanabe, Layered ( 1 − x − y ) LiNi1 / 2Mn1 / 2 O 2 ⋅ xLi [ Li1 / 3Mn2 / 3 ] O 2 ⋅ yLiCoO2 ( 0 ⩽ x = y ⩽ 0.3 and x + y = 0.5 ) Cathode Materials Journal of The Electrochemical Society. ,vol. 152, pp. 171- 178 ,(2005) , 10.1149/1.1829416
G.-H. Kim, J.-H. Kim, S.-T. Myung, C. S. Yoon, Y.-K. Sun, Improvement of High-Voltage Cycling Behavior of Surface-Modified Li [ Ni1 ∕ 3Co1 ∕ 3Mn1 ∕ 3 ] O2 Cathodes by Fluorine Substitution for Li-Ion Batteries Journal of The Electrochemical Society. ,vol. 152, ,(2005) , 10.1149/1.1952747
S. Jouanneau, J. R. Dahn, Influence of LiF Additions on Li [ Ni x Co1 − 2x Mn x ] O 2 Materials Sintering, Structure, and Lithium Insertion Properties Journal of The Electrochemical Society. ,vol. 151, ,(2004) , 10.1149/1.1793712
D. A. R. Barkhouse, J. R. Dahn, A Novel Fabrication Technique for Producing Dense Li [ Ni x Li ( 1 ∕ 3 – 2x ∕ 3 ) Mn ( 2 ∕ 3 − x ∕ 3 ) ] O2, 0 ⩽ x ⩽ 1∕2 Journal of The Electrochemical Society. ,vol. 152, ,(2005) , 10.1149/1.1864372
Younkee Paik, Clare P. Grey, Christopher S. Johnson, Jeom-Soo Kim, Michael M. Thackeray, Lithium and Deuterium NMR Studies of Acid-Leached Layered Lithium Manganese Oxides Chemistry of Materials. ,vol. 14, pp. 5109- 5115 ,(2002) , 10.1021/CM0206385
J-S Kim, CS Johnson, MM Thackeray, Layered xLiMO2.(1 - x)Li2M'O3 electrodes for lithium batteries: a study of 0.95LiMn0.5Ni0.5O2.0.05Li2TiO3 Electrochemistry Communications. ,vol. 4, pp. 205- 209 ,(2002) , 10.1016/S1388-2481(02)00251-5
MH Rossouw, MM Thackeray, Lithium manganese oxides from Li2MnO3 for rechargeable lithium battery applications Materials Research Bulletin. ,vol. 26, pp. 463- 473 ,(1991) , 10.1016/0025-5408(91)90186-P
Jeom-Soo Kim, Christopher S. Johnson, John T. Vaughey, Michael M. Thackeray, Stephen A. Hackney, Wonsub Yoon, Clare P. Grey, Electrochemical and Structural Properties of xLi2M‘O3·(1−x)LiMn0.5Ni0.5O2 Electrodes for Lithium Batteries (M‘ = Ti, Mn, Zr; 0 ≤ x ⩽ 0.3) Chemistry of Materials. ,vol. 16, pp. 1996- 2006 ,(2004) , 10.1021/CM0306461