Utilizing Environmental Friendly Iron as a Substitution Element in Spinel Structured Cathode Materials for Safer High Energy Lithium-Ion Batteries

被引：50

作者：

Hu, Enyuan ^{[1
]}

Bak, Seong-Min ^{[1
]}

Liu, Yijin ^{[2
]}

Liu, Jue ^{[1
,3
]}

Yu, Xiqian ^{[1
]}

Zhou, Yong-Ning ^{[1
]}

Zhou, Jigang ^{[4
]}

Khalifah, Peter ^{[1
,3
]}

Ariyoshi, Kingo ^{[5
]}

Nam, Kyung-Wan ^{[6
]}

Yang, Xiao-Qing ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA

[2] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[3] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

[4] Canadian Light Source Inc, Saskatoon, SK S7N 0X4, Canada

[5] Osaka City Univ, Dept Appl Chem, Grad Sch Engn, Sumiyoshi, Osaka 5588585, Japan

[6] Dongguk Univ, Dept Energy & Mat Engn, Seoul 100715, South Korea

来源：

ADVANCED ENERGY MATERIALS | 2016年 / 6卷 / 03期

关键词：

cathodes; energy storage; high voltage spinel; lithium ion batteries; structure-property relationships; NICKEL-OXIDE DERIVATIVES; THERMAL-STABILITY; RUNAWAY; METAL; LIXNI0.89AL0.16O2; LIXNI1.02O2; CHALLENGES; CELLS; FE;

D O I：

10.1002/aenm.201501662

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Suppressing oxygen release from lithium ion battery cathodes during heating is a critical issue for the improvement of the battery safety characteristics because oxygen can exothermically react with the flammable electrolyte and cause thermal runaway. Previous studies have shown that oxygen release can be reduced by the migration of transition metal cations from octahedral sites to tetrahedral sites during heating. Such site-preferred migration is determined by the electronic structure of cations. Taking advantage of the unique electronic structure of the environmental friendly Fe, this is selected as substitution element in a high energy density material LiNi0.5Mn1.5O4 to improve the thermal stability. The optimized LiNi0.33Mn1.33Fe0.33O4 material shows significantly improved thermal stability compared with the unsubstituted one, demonstrated by no observed oxygen release at temperatures as high as 500 degrees C. Due to the electrochemical contribution of Fe, the high energy density feature of LiNi0.5Mn1.5O4 is well preserved.

引用

页数：7

共 33 条

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