Thin nanostructured LiMn2O4 films by flame spray deposition and in situ annealing method

JOURNAL OF POWER SOURCES

卷:189

Article; Proceedings Paper

Chew, S. Y.^1,2,3  Patey, T. J.¹  Waser, O.⁴  Ng, S. H.¹  Buechel, R.⁴  Tricoli, A.⁴  Krumeich, F.⁵  Wang, J.^2,3  Liu, H. K.^2,3  Pratsinis, S. E.⁴  Novak, P.¹ 

[1] Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland

[2] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

[3] Univ Wollongong, ARC Ctr Excellence Electromat Sci, Wollongong, NSW 2522, Australia

[4] ETH, Dept Mech & Proc Engn, Particle Technol Lab, CH-8092 Zurich, Switzerland

[5] ETH, Inorgan Chem Lab, CH-8093 Zurich, Switzerland

关键词: LiMn2O4;    Cathode;    Thin film;    Flame spray deposition;    Lithium-ion battery;   

DOI  :  10.1016/j.jpowsour.2008.12.085

来源: Elsevier

【 摘 要 】

A new approach has been developed to rapidly synthesize nanostructured LiMn2O4 thin films by flame spray deposition (FSD) and in situ annealing. A precursor solution of lithium acetylacetonate and manganese acetylacetonate in an organic solution was supplied through a flame spray pyrolysis (FSP) reactor. The liquid solution spray was ignited and stabilized by a premixed methane/oxygen flame ring surrounding the FSP nozzle. Thus, LiMn2O4 nanoparticles were formed by combustion and deposited onto a current collector followed by in situ annealing. Two different types of current collectors, i.e. stainless steel and aluminum coated with carbon-based primer were tested. The prepared thin films were characterized by X-ray diffraction and field-emission scanning electron microscopy. The electrochemical properties of the thin films were evaluated by cyclic voltammetry and galvanostatic cycling. The LiMn2O4 films exhibited good cyclability. Films that underwent sintering and crystal growth during in situ annealing developed more robust film structures on the current collector surface and exhibited better electrochemical performance than poorly adhered films. (C) 2008 Elsevier B.V. All rights reserved.

【 授权许可】

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