Phase Transition of LiMn2O4 Spinel and its Application for Lithium Ion Secondary Battery

1997 ◽  
Vol 496 ◽  
Author(s):  
Junji Tabuchi ◽  
Tatsuji Numata ◽  
Yuichi Shimakawa ◽  
Masato Shirakata
Keyword(s):  
Phase Transition ◽  
Lithium Ion ◽  
Electrochemical Characteristics ◽  
Teller Distortion ◽  
Limn2o4 Spinel ◽  
Structure Changes ◽  
Jahn Teller ◽  
Initial Charge ◽  
Lower Temperature ◽  
Jahn Teller Distortion

ABSTRACTLiMn2O4 has a phase transition at room temperature, which is caused by Jahn-Teller distortion. DC resistivity of LiMn2O4 shows an anomaly at the transition temperature, while no such anomaly is observed in samples with excess lithium. X-ray diffraction patterns of LiMn2O4reveal that the crystal structure changes from cubic at higher temperature to orthorombic, as a first approximation, at lower temperature. However, no differences in initial charge-discharge curve are observed, which means that the Jahn-Teller distortion has no effect on electrochemical characteristics. The authors have succeeded in mass-producing lithium ion secondary batteries with a manganese spinel cathode.

Crystal structures and phase transition in (Sr0.8Ce0.2)(Mn1−yCoy)O3(y= 0 and 0.2): the influence of Jahn–Teller distortion

2009 ◽  
Vol 21 (12) ◽  
pp. 124218 ◽  
Author(s):  
Zhaoming Zhang ◽  
Christopher J Howard ◽  
Brendan J Kennedy ◽  
Motohide Matsuda ◽  
Michihiro Miyake
Keyword(s):  
Phase Transition ◽  
Crystal Structures ◽  
Teller Distortion ◽  
Jahn Teller ◽  
Jahn Teller Distortion

Structure of the clinopyroxene-type compound CaCuGe2O6 between 15 and 800 K

2005 ◽  
Vol 61 (4) ◽  
pp. 367-380 ◽  
Author(s):  
Günther J. Redhammer ◽  
Gerold Tippelt ◽  
Michael Merz ◽  
Georg Roth ◽  
Werner Treutmann ◽  
...  
Keyword(s):  
Phase Transition ◽  
Magnetic Susceptibility ◽  
Magnetic Phase ◽  
Metal Layer ◽  
Lattice Parameters ◽  
Zigzag Chain ◽  
Two Dimensional ◽  
Teller Distortion ◽  
Jahn Teller ◽  
Jahn Teller Distortion

CaCuGe2O6 shows a strongly distorted clinopyroxene-type structure with P21/c symmetry at 298 K. The Cu2+ ion at the M1 site is coordinated by six O atoms forming an octahedron, which deviates significantly from ideal geometry. Individual M1 sites are connected via common edges to form an infinite zigzag chain parallel to the crystallographic c axis. The Ca2+ ion at M2 shows a sevenfold coordination. M2 sites are connected to the M1 chain via three common edges, thereby forming a metal layer within the bc plane. Besides the strong Jahn–Teller distortion of the Cu site, the structure of the title compound differs from `normal' clinopyroxenes by a distortion of alternate layers of Ge sites. While the Ge(A) site is fourfold coordinated by O atoms, forming infinite chains of corner-sharing chains parallel to the c axis, the Ge(B) site exhibits a fivefold coordination, thereby forming a true two-dimensional layer of edge-sharing GeO5 bipyramids. Decreasing the temperature causes a magnetic phase transition at 40 K, as monitored by a broad maximum in the magnetic susceptibility and by discontinuities in the lattice parameters. Increasing the temperature causes variations in bond lengths, edge lengths and bond angles. Most prominent is the increase of one bond length of the Ge(B) site and the increase of the tetrahedral bridging angle of the Ge(A) site. At 660 K a crystallographic phase transition is observed where the symmetry changes from P21/c to C2/c. The transition is accompanied by large changes in the lattice parameters which are indicative of distinct topological changes of several structural building units. The high-temperature C2/c structure is similar to that of the germanate clinopyroxene CaMgGe2O6.

The role of Jahn–Teller distortion in insulator to semiconductor phase transition in organic–inorganic hybrid compound (p-chloroanilinium)2CuCl4at high pressure

2015 ◽  
Vol 17 (48) ◽  
pp. 32204-32210 ◽  
Author(s):  
Pallavi Ghalsasi ◽  
Nandini Garg ◽  
M. N. Deo ◽  
Alka Garg ◽  
Hemant Mande ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Hybrid Compound ◽  
Teller Distortion ◽  
Inorganic Hybrid ◽  
Jahn Teller ◽  
Jahn Teller Distortion

The captions for pressure values are not centered below each micrograph.

scholarly journals Enhanced Performance of LiAl0.1Mn1.9O4 Cathode for Li-Ion Battery via TiN Coating

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 825
Author(s):  
Pinelopi Angelopoulou ◽  
Spyros Kassavetis ◽  
Joan Papavasiliou ◽  
Dimitris Karfaridis ◽  
Grzegorz Słowik ◽  
...  
Keyword(s):  
Lithium Ion ◽  
Capacity Fading ◽  
Spinel Limn2o4 ◽  
Tin Coating ◽  
Teller Distortion ◽  
Jahn Teller ◽  
Li Ion ◽  
Structure Stabilization ◽  
Jahn Teller Distortion

The present work addresses the issues related to the capacity fading of spinel LiMn2O4, such as Mn leaching and Jahn–Teller distortion and suggests an advanced TiN-coated LiAl0.1Mn1.9O4 (LAMO) cathode material as an electrode for lithium-ion batteries. TiN coating layers with the same thickness but a different porosity cover the LiAl0.1Mn1.9O4 electrode via reactive magnetron sputtering, and present promising electrochemical behavior. In contrast with the pristine LiAl0.1Mn1.9O4, the dense TiN-coated LiAl0.1Mn1.9O4 electrode demonstrates a remarkable long-term cycling by reducing the contact area of the electrode/electrolyte interface, resulting in structure stabilization.

Double the Capacity of Manganese Spinel for Lithium‐Ion Storage by Suppression of Cooperative Jahn–Teller Distortion

2020 ◽  
Vol 10 (34) ◽  
pp. 2000363 ◽  
Author(s):  
Changjian Zuo ◽  
Zongxiang Hu ◽  
Rui Qi ◽  
Jiajie Liu ◽  
Zhibo Li ◽  
...  
Keyword(s):  
Lithium Ion ◽  
Teller Distortion ◽  
Ion Storage ◽  
Jahn Teller ◽  
Jahn Teller Distortion

A second-order Jahn-Teller distortion in the solid: the phase transition in VSx

1986 ◽  
Vol 116 (1) ◽  
pp. 113-128 ◽  
Author(s):  
Jérôme Silvestre ◽  
Wolfgang Tremel ◽  
Roald Hoffmann
Keyword(s):  
Phase Transition ◽  
Second Order ◽  
Teller Distortion ◽  
Jahn Teller ◽  
Jahn Teller Distortion

Preparation and Characterization of (C4H9NH3)2MCl4 (M=Mn, Cu)

2004 ◽  
Vol 848 ◽  
Author(s):  
Liling Guo ◽  
Yadong Dai ◽  
Mingjie Hu ◽  
Hanxing Liu ◽  
Shixi Ouyang
Keyword(s):  
Layered Perovskite ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Teller Distortion ◽  
Jahn Teller ◽  
Lower Temperature ◽  
Xrd Patterns ◽  
Jahn Teller Distortion ◽  
Perovskite Type

ABSTRACTWith the preparation of organic-inorganic layered perovskite-type compounds (C4H9NH3)2MCl4 (M = Mn, Cu) in solutions, X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal gravimetry (TG) and differential scanning calorimetry (DSC) have been used to characterize the obtained powders. XRD patterns demonstrate that the two compounds have obvious layered structures and SEM pictures reveal that both (C4H9NH3)2MnCl4 and (C4H9NH3)2CuCl4 take on obvious sheet-like microstructure. TG&DSC curves indicate that (C4H9NH3)2CuCl4 decomposes at much lower temperature than (C4H9NH3)2MnCl4.This is ascribed to weakening interactions between its organic and inorganic components, which is presumably due to the Jahn-Teller distortion of [CuCl6] octahedra.

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