Three-Dimensional, Fibrous Lithium Iron Phosphate Structures Deposited by Magnetron Sputtering

被引：17

作者：

Buenting, Aiko ^{[1
]}

Uhlenbruck, Sven ^{[1
]}

Sebold, Doris ^{[1
]}

Buchkremer, H. P. ^{[1
]}

Vassen, R. ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Energy & Climate Res Mat Synth & Proc IEK 1, D-52425 Julich, Germany

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 40期

关键词：

3D microbattery; lithium iron phosphate; magnetron sputtering nanostructured electrodes; lithium-ion battery; fibrous structures; LIFEPO4; THIN-FILM; NANOSTRUCTURED CATHODE MATERIALS; GLANCING ANGLE DEPOSITION; PULSED-LASER DEPOSITION; ELECTROCHEMICAL PROPERTIES; ION; PERFORMANCE; GROWTH; SPECTROSCOPY; TEMPERATURE;

D O I：

10.1021/acsami.5b07090

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Crystalline, three-dimensional (3D) structured lithium iron phosphate (LiFePO4) thin films with additional carbon are fabricated by a radio frequency (RE) magnetron-sputtering process in a single step. The 3D structured thin films are obtained at deposition temperatures of 600 degrees C and deposition times longer than 60 min by using a conventional sputtering setup. In contrast to glancing angle deposition (GLAD) techniques, no tilting of the substrate is required. Thin films are characterized by X-ray diffraction (XRD), Raman spectrospcopy, scanning electron microscopy (SEM), cyclic voltammetry (CV), and galvanostatic charging and discharging. The structured LiFePO4 + C thin films consist of fibers that grow perpendicular to the substrate surface. The fibers have diameters up to 500 nm and crystallize in the desired olivine structure. The 3D structured thin films have superior electrochemical properties compared with dense two-dimensional (2D) LiFePO4 thin films and are, hence, very promising for application in 3D microbatteries.

引用

页码：22594 / 22600

页数：7

共 56 条

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