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Characterization of LiCoO2 nanopowders produced by sol-gel processing

Asgari, S ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1155/2010/104012
  3. Publisher: 2010
  4. Abstract:
  5. LiCoO2 nanopowders, one of the most important cathode materials for lithium-ion batteries, were synthesized via a modified sol-gel process assisted with triethanolamine (TEA) as a complexing agent. The influence of three different chelating agents including acrylic acid, citric acid, and oxalic acid on the size and morphology of particles was investigated. Structure and morphology of the synthesized powders were characterized by thermogravimetric/ differential thermal analyses (TG/DTA), X-ray diffraction (XRD), and transmission electron microscopy (TEM). Results indicate that the powder processed with TEA and calcinated at 800 °C had an excellent hexagonal ordering of α-NaFeO2 -type (space group R 3 m). Also, the other three complexing agents had a decisive influence on the particle size, shape, morphology, and degree of agglomeration of the resulting oxides. Based on the data presented in this work, it is proposed that the optimized size and distribution of LiCoO2 powders may be achieved through sol-gel processing using TEA as a chelating agent
  6. Keywords:
  7. Acrylic acids ; Cathode materials ; Chelating agent ; Complexing agents ; Degree of agglomeration ; Hexagonal ordering ; Lithium-ion battery ; Modified sol-gel process ; Nano powders ; Oxalic Acid ; Sol-Gel processing ; Space Groups ; Structure and morphology ; Synthesized powder ; TEM ; Triethanolamines ; Agglomeration ; Carboxylic acids ; Cathodes ; Chelation ; Citric acid ; Differential thermal analysis ; Gels ; Lithium ; Lithium alloys ; Lithium compounds ; Morphology ; Nanostructured materials ; Organic acids ; Powders ; Sol-gels ; Sols ; Transmission electron microscopy ; X ray diffraction ; X ray powder diffraction ; Sol-gel process
  8. Source: Journal of Nanomaterials ; Volume 2010 , 2010 ; 16874110 (ISSN)
  9. URL: https://www.hindawi.com/journals/jnm/2010/104012