Ultrathin Coatings on Nano-LiCoO2 for Li-Ion Vehicular Applications

被引：347

作者：

Scott, Isaac D. ^{[1
]}

Jung, Yoon Seok ^{[2
]}

Cavanagh, Andrew S. ^{[4
]}

An, Yanfa ^{[2
]}

Dillon, Anne C. ^{[2
]}

George, Steven M. ^{[3
]}

Lee, Se-Hee ^{[1
]}

机构：

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

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

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

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

来源：

NANO LETTERS | 2011年 / 11卷 / 02期

关键词：

Atomic layer deposition; LiCoO2; rate performance; Li-ion battery; capacity fade; nanotechnology; ATOMIC LAYER DEPOSITION; ELECTROCHEMICAL PERFORMANCE; SURFACE MODIFICATION; NATURAL GRAPHITE; CATHODE MATERIAL; BATTERIES; INSERTION;

D O I：

10.1021/nl1030198

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To deploy Li-ion batteries in next-generation vehicles, it is essential to develop electrodes with durability, high energy density, and high power. Here we report a breakthrough in controlled full-electrode nanoscale coatings that enables nanosized materials to cycle with durable high energy and remarkable rate performance. The nanoparticle electrodes are coated with Al2O3 using atomic layer deposition (ALD). The coated nano-LiCoO2 electrodes with 2 ALD cycles deliver a discharge capacity of 133 mAh/g with currents of 1400 mA/g (7.8C), corresponding to a 250% improvement in reversible capacity compared to bare nanoparticles (br-nLCO), when cycled at this high rate. The simple ALD process is broadly applicable and provides new opportunities for the battery industry to design highly durable even while cycling at high rate.

引用

页码：414 / 418

页数：5

共 29 条

[1] Nanostructured materials for advanced energy conversion and storage devices [J].

Aricò, AS ;

Bruce, P ;

Scrosati, B ;

Tarascon, JM ;

Van Schalkwijk, W .

NATURE MATERIALS, 2005, 4 (05) :366-377

[2] Fast, completely reversible Li insertion in vanadium pentoxide nanoribbons [J].

Chan, Candace K. ;

Peng, Hailin ;

Twesten, Ray D. ;

Jarausch, Konrad ;

Zhang, Xiao Feng ;

Cui, Yi .

NANO LETTERS, 2007, 7 (02) :490-495

[3] Effect of a ZrO2 coating on the structure and electrochemistry of LixCoO2 when cycled to 4.5 V [J].

Chen, ZH ;

Dahn, JR .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2002, 5 (10) :A213-A216

[4] Role of surface coating on cathode materials for lithium-ion batteries [J].

Chen, Zonghai ;

Qin, Yan ;

Amine, Khalil ;

Sun, Y. -K .

JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (36) :7606-7612

[5] A breakthrough in the safety of lithium secondary batteries by coating the cathode material with AIPO4 nanoparticles [J].

Cho, J ;

Kim, YW ;

Kim, B ;

Lee, JG ;

Park, B .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (14) :1618-1621

[6]

Cho J, 2001, ANGEW CHEM INT EDIT, V40, P3367, DOI 10.1002/1521-3773(20010917)40:18<3367::AID-ANIE3367>3.0.CO

[7]

2-A

[8] Nanoparticulate coatings for enhanced cyclability of LiCoO2 cathodes [J].

Fey, GTK ;

Lu, CZ ;

Huang, JD ;

Kumar, TP ;

Chang, YC .

JOURNAL OF POWER SOURCES, 2005, 146 (1-2) :65-70

[9] Surface chemistry for atomic layer growth [J].

George, SM ;

Ott, AW ;

Klaus, JW .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (31) :13121-13131

[10] Atomic Layer Deposition: An Overview [J].

George, Steven M. .

CHEMICAL REVIEWS, 2010, 110 (01) :111-131

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