Unexpected Improved Performance of ALD Coated LiCoO2/Graphite Li-Ion Batteries

被引：205

作者：

Jung, Yoon Seok ^{[1
,2
]}

Lu, Peng ^{[3
]}

Cavanagh, Andrew S. ^{[4
]}

Ban, Chunmei ^{[1
]}

Kim, Gi-Heon ^{[1
]}

Lee, Se-Hee ^{[5
]}

George, Steven M. ^{[6
,7
]}

Harris, Stephen J. ^{[3
]}

Dillon, Anne C. ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

[2] UNIST, Interdisciplinary Sch Green Energy, Ulsan 689798, South Korea

[3] Gen Motors Res & Dev Ctr, Warren, MI 48090 USA

[4] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[5] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA

[6] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA

[7] Univ Colorado, Dept Chem & Biol Engn, Boulder, CO 80309 USA

来源：

ADVANCED ENERGY MATERIALS | 2013年 / 3卷 / 02期

关键词：

batteries; electrodes; surface modification; thin films; functional coatings; ATOMIC LAYER DEPOSITION; CAPACITY LOSSES; LITHIUM; ELECTRODES; CATHODE; ANODE; INTERPHASE; STABILITY; LICOO2;

D O I：

10.1002/aenm.201200370

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：

The performance of Al2O3 atomic layer deposition (ALD) coatings for LiCoO2/natural graphite (LCO/NG) batteries is investigated, where various permutations of the electrodes are coated in a full battery. Coating both electrodes with approximate to 1 nm of alumina as well as coating only the LCO (positive electrode) enables improved performance when cycling at high voltage, where the LCO is known to degrade. However, we found that coating only the NG (negative electrode) also improves the performance of the whole battery when cycling at high voltage. Under these conditions, the uncoated LCO (positive electrode) should degrade quickly, and the NG should be unaffected. A variety of characterization techniques show the surface reactions that occur on the negative electrode and positive electrode are related, resulting in the enhanced performance of the uncoated LCO.

引用

页码：213 / 219

页数：7

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