Jahn–Teller effect in LiMn2O4: influence on charge ordering, magnetoresistance and battery performance

2017 ◽  
Vol 19 (3) ◽  
pp. 2073-2077 ◽  
Author(s):  
K. Ragavendran ◽  
H. Xia ◽  
P. Mandal ◽  
A. K. Arof
Keyword(s):  
Phase Transition ◽  
Grain Size ◽  
Electrochemical Performance ◽  
Cathode Material ◽  
Room Temperature ◽  
Charge Ordering ◽  
Teller Effect ◽  
Jahn Teller ◽  
Jahn Teller Effect

The phase transition near room temperature in LiMn2O4 was studied as a function of the oxygen non-stoichiometry and as a function of the grain size of the cathode material and directly compared with its electrochemical performance.

Cooperative Pseudo Jahn-Teller Effect as Microscopic Mechanism of (OMT)-(LTT) Structural Phase Transition in La2−xBaxCuO4Superconductors

1992 ◽  
Vol 291 ◽  
Author(s):  
Michael D. Kaplan
Keyword(s):  
Phase Transition ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Electronic States ◽  
Teller Effect ◽  
Excited Electronic States ◽  
Microscopic Mechanism ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Local Distortions

ABSTRACTA microscopic mechanism for the structural phase transition from the orthorhombic mediate temperature (OMT) phase into the low temperature tetragonal (LTT) one is suggested on the basis of the cooperative pseudo Jahn-Teller effect. The local distortions mixing the ground and the first excited electronic states are ordered antiferrodistortively and are connected in part, with the oxygen octahedra rotations around the [100] axis. The results are in agreement, with the neutron scattering experiments data.

Element Substitution for Spinel LiMn2O4 Cathode

2021 ◽  
Author(s):  
Shu Zhang ◽  
Wentao Deng ◽  
Roya Momen ◽  
Shouyi Yin ◽  
Jun Chen ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Teller Effect ◽  
Spinel Limn2o4 ◽  
Element Substitution ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Limn2o4 Cathode ◽  
Bulk Structure

Spinel LiMn2O4 is a promising cathode material for lithium-ion batteries ascribed to its steady bulk structure and abundant manganese sources. Nevertheless, grievous capacity decay due to the Jahn-Teller effect and...

Preparation and Performance of Rod-Like Lithium-Rich Spinel Li1+x Mn2−x O 4 by the Hydrothermal Synthesis-Solid Phase Calcination Method

2021 ◽  
Vol 13 (3) ◽  
pp. 351-355
Author(s):  
Hong-Yan Xie ◽  
Ye-Zhu Li ◽  
Ya-Qing Zhang ◽  
Hui-Xin Jin ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Electrochemical Performance ◽  
Discharge Capacity ◽  
Performance Test ◽  
Solid Phase ◽  
Teller Effect ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Li Ion ◽  
Calcination Method

Spinel LiMn2O4 is of value for Li-ion batteries. However, the capacity decay due to the Jahn-teller effect still must be solved. Li-rich materials depress the Jahn-Teller effect by increasing the Li-ion content and decreasing the Mn3+ content simultaneously. In this paper, rod-like Li-rich spinel Li1+xMn2−xO4 was prepared by a hydrothermal synthesis-solid phase calcination method. The electrochemical performance test showed that the Li-rich materials had higher charge-discharge capacity and cycle performance, and the Li1.06Mn1.94O4 material had the best electrochemical performance. The specific discharge capacity reached 118 mAh/g at 0.5 °C and the capacity retentions were 95.69% and 90.72%, respectively, at 25 °C and 55 °C after 100 cycles. The discharge capacities of Li1+xMn2−xO4 were better than pure LiMn2O4 under high discharge rates.

Dynamic Pseudo Jahn−Teller Effect and the Phase Transition Induced by Absorption of Molecules in Metal−Organic Nanotube Framework

2008 ◽  
Vol 112 (13) ◽  
pp. 5074-5077 ◽  
Author(s):  
Svyatoslav P. Gabuda ◽  
Svetlana G. Kozlova ◽  
Valeri A. Drebuschak ◽  
Danil N. Dybtsev ◽  
Vladimir P. Fedin
Keyword(s):  
Phase Transition ◽  
Teller Effect ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Metal Organic
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