Atomic layer deposition of amorphous TiO2 on graphene as an anode for Li-ion batteries

被引：80

作者：

Ban, Chunmei ^{[1
]}

Xie, Ming ^{[2
,3
]}

Sun, Xiang ^{[4
]}

Travis, Jonathan J. ^{[2
,3
]}

Wang, Gongkai ^{[4
]}

Sun, Hongtao ^{[4
]}

Dillon, Anne C. ^{[1
]}

Lian, Jie ^{[4
]}

George, Steven M. ^{[2
,3
]}

机构：

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

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

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

[4] Rensselaer Polytech Inst, Dept Mech Aerosp & Nucl Engn, Troy, NY 12180 USA

来源：

NANOTECHNOLOGY | 2013年 / 24卷 / 42期

基金：

美国国家科学基金会;

关键词：

BINARY REACTION SEQUENCE; HIGH AREAL CAPACITY; LITHIUM-STORAGE; ANATASE TIO2; PHOTOCATALYTIC ACTIVITY; CARBON NANOTUBES; THIN-FILMS; OXIDE; GRAPHITE; NANOPARTICLES;

D O I：

10.1088/0957-4484/24/42/424002

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Atomic layer deposition (ALD) was used to deposit TiO2 anode material on high surface area graphene (reduced graphene oxide) sheets for Li-ion batteries. An Al2O3 ALD ultrathin layer was used as an adhesion layer for conformal deposition of the TiO2 ALD films at 120 degrees C onto the conducting graphene sheets. The TiO2 ALD films on the Al2O3 ALD adhesion layer were nearly amorphous and conformal to the graphene sheets. These nanoscale TiO2 coatings minimized the effect of the low diffusion coefficient of lithium ions in bulk TiO2. The TiO2 ALD films exhibited stable capacities of similar to 120 mAh g(-1) and similar to 100 mAh g(-1) at high cycling rates of 1 A g(-1) and 2 A g(-1), respectively. The TiO2 ALD films also displayed excellent cycling stability with similar to 95% of the initial capacity remaining after 500 cycles. These results illustrate that ALD can provide a useful method to deposit electrode materials on high surface area substrates for Li-ion batteries.

引用

页数：6