Tris(pentafluorophenyl) Borane as an Electrolyte Additive for LiFePO4 Cathode Material to Improve High Temperature Cycling Efficiency

2009 ◽  
Keyword(s):  
High Temperature ◽  
Cathode Material ◽  
Temperature Cycling ◽  
Electrolyte Additive ◽  
Cycling Efficiency ◽  
Lifepo4 Cathode

scholarly journals Improved Electrochemical Properties of LiMn2O4-Based Cathode Material Co-Modified by Mg-Doping and Octahedral Morphology

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2807 ◽  
Author(s):  
Hongyuan Zhao ◽  
Yongfang Nie ◽  
Dongyang Que ◽  
Youzuo Hu ◽  
Yongfeng Li
Keyword(s):  
High Temperature ◽  
Cathode Material ◽  
Electrochemical Properties ◽  
Solid Phase ◽  
High Capacity ◽  
Temperature Cycling ◽  
Phase Method ◽  
Mg Doping ◽  
Jahn Teller ◽  
Solid Phase Method

In this work, the spinel LiMn2O4 cathode material was prepared by high-temperature solid-phase method and further optimized by co-modification strategy based on the Mg-doping and octahedral morphology. The octahedral LiMn1.95Mg0.05O4 sample belongs to the spinel cubic structure with the space group of Fd3m, and no other impurities are presented in the XRD patterns. The octahedral LiMn1.95Mg0.05O4 particles show narrow size distribution with regular morphology. When used as cathode material, the obtained LiMn1.95Mg0.05O4 octahedra shows excellent electrochemical properties. This material can exhibit high capacity retention of 96.8% with 100th discharge capacity of 111.6 mAh g−1 at 1.0 C. Moreover, the rate performance and high-temperature cycling stability of LiMn2O4 are effectively improved by the co-modification strategy based on Mg-doping and octahedral morphology. These results are mostly given to the fact that the addition of magnesium ions can suppress the Jahn–Teller effect and the octahedral morphology contributes to the Mn dissolution, which can improve the structural stability of LiMn2O4.

Enhanced high-temperature cycling stability of LiNi1/3Co1/3Mn1/3O2-coated LiMn2O4 as cathode material for lithium ion batteries

Ionics ◽  
2015 ◽  
Vol 21 (7) ◽  
pp. 1835-1842 ◽  
Author(s):  
Jing Yan ◽  
Haohan Liu ◽  
Yuelei Wang ◽  
Xinxin Zhao ◽  
Yiming Mi ◽  
...  
Keyword(s):  
High Temperature ◽  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Temperature Cycling

Effect of high temperature cycling on both crack formation in ceramics and delamination of copper layers in silicon nitride active metal brazing substrates

2017 ◽  
Vol 43 (6) ◽  
pp. 5080-5088 ◽  
Author(s):  
Hiroyuki Miyazakia ◽  
Shoji Iwakiri ◽  
Kiyoshi Hirao ◽  
Shinji Fukuda ◽  
Noriya Izu ◽  
...  
Keyword(s):  
High Temperature ◽  
Silicon Nitride ◽  
Crack Formation ◽  
Temperature Cycling ◽  
Active Metal
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