Lithium Insertion/Deinsertion Characteristics of Nanostructured Amorphous Tantalum Oxide Thin Films

被引：29

作者：

Dang, Hoang X. ^{[2
]}

Lin, Yong-Mao ^{[2
]}

Klavetter, Kyle C. ^{[2
]}

Cell, Trevor H. ^{[2
]}

Heller, Adam ^{[1
]}

Mullins, C. Buddie ^{[1
]}

机构：

[1] Univ Texas Austin, McKetta Dept Chem Engn, Dept Chem, Austin, TX 78712 USA

[2] Univ Texas Austin, McKetta Dept Chem Engn, Austin, TX 78712 USA

来源：

CHEMELECTROCHEM | 2014年 / 1卷 / 01期

基金：

美国国家科学基金会;

关键词：

lithium batteries; nanoporous structures; reactive ballistic deposition; tantalum oxide; thin films; REACTIVE BALLISTIC DEPOSITION; FLUOROETHYLENE CARBONATE; ENERGY-CONVERSION; TA2O5; FILM; SURFACE; ELECTROLYTE; PERFORMANCE; INTERCALATION; NANOMATERIALS; PHOTOANODES;

D O I：

10.1002/celc.201300139

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Lithium uptake and release by pure, morphology-controlled Ta2O5 films is studied. Porous nanocolumnar films, reactively e-beam deposited at 70 degrees versus normal, are rapidly lithiated and delithiated, withstanding volume-change-associated stresses. Their reversible gravimetric Coulombic capacities at 1 C, 2 C, 5 C, and 10 C rates are, respectively, 252, 225, 192, 168 mAhg(-1). After 100 cycles at 1 C rate the films retain 96% of their Coulombic capacity and 99% of their Coulombic efficiency. The rapid lithiation/delithiation is attributed to formation of amorphous, Li+ permeable, nanoporous LiTaO3.

引用

页码：158 / 164

页数：7

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