Structural transformation in a Li1.2Co0.1Mn0.55Ni0.15O2 lithium-ion battery cathode during high-voltage hold

被引：42

作者：

Mohanty, Debasish ^{[1
]}

Kalnaus, Sergiy ^{[1
]}

Meisner, Roberta A. ^{[1
]}

Safat, Athena S. ^{[1
]}

Li, Jianlin ^{[2
]}

Payzant, E. Andrew ^{[3
]}

Rhodes, Kevin ^{[4
]}

Wood, David L., III ^{[1
]}

Daniel, Claus ^{[2
,5
]}

机构：

[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37931 USA

[2] Oak Ridge Natl Lab, Energy & Transportat Sci Div, Oak Ridge, TN 37831 USA

[3] Oak Ridge Natl Lab, Chem & Engn Mat Div, Oak Ridge, TN 37831 USA

[4] Ford Motor Co, Ford Res & Innovat Ctr, Dearborn, MI 48121 USA

[5] Univ Tennessee, Bredesen Ctr Interdisciplinary Res & Grad Educ, Knoxville, TN 37996 USA

来源：

RSC ADVANCES | 2013年 / 3卷 / 20期

关键词：

POSITIVE-ELECTRODE MATERIALS; X-RAY-DIFFRACTION; OXIDES; STABILITY; EVOLUTION; CAPACITY;

D O I：

10.1039/c3ra40510a

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

A decrease in the c-lattice parameter was observed in Li1.2Co0.1Mn0.55Ni0.15O2 during constant voltage holding at 4.5 V by in situ X-ray diffraction. Comparison of magnetic susceptibility data before and after high-voltage hold reveals the change in average oxidation states of transition metal ions during high-voltage holding process. Transmission electron microscopy studies show the spinel reflections with fundamental trigonal spots from the particles after high-voltage hold indicating substantial structural modification. The structural transformation was believed to occur due to the oxygen release and/or the migration of transition metal cations to lithium layer during constant voltage holding.

引用

页码：7479 / 7485

页数：7

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