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Structural, microstructural and electrochemical studies of TiO2-Ag double layer coated NCM cathode for lithium-ion batteries

Sharifi Rad, A ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1088/2053-1591/ab28e0
  3. Publisher: Institute of Physics Publishing , 2019
  4. Abstract:
  5. Lithium ion batteries as one of the most important energy storage equipments, have several challenges including capacity drop as number of cycles increases. Cathode particle coating is an effective approach in improvement of electrochemical performance of the batteries. In this study, TiO2-Ag coating was used to improve NCM cathode performance. The microstructure and crystal structure properties of coated NCMs were evaluated by the FE-SEM and XRD. Electrochemical behavior of the batteries was investigated by cycling performance analysis and EIS. TiO2 coating was deposited as a uniform layer and Ag coating was precipitated as dispersed nanoparticles. The results shows that using of TiO2-Ag coating can improve retention up to 75.9%. The FE-SEM and XRD studies of coated and uncoated NCMs after 100 cycles shows a higher crystalline and microstructural stability for coated NCMs. The TiO2 coated sample shows less increase in charge transfer resistance (62.4 %) than uncoated sample (232.9 %). The charge transfer resistance for TiO2-Ag coated sample decreased significantly. © 2019 IOP Publishing Ltd
  6. Keywords:
  7. Cathode ; Coating ; Lithium-ion battery ; TiO2 ; Cathodes ; Charge transfer ; Coatings ; Crystal structure ; Ions ; Silver ; TiO2 nanoparticles ; Titanium dioxide ; X ray diffraction ; Charge transfer resistance ; Dispersed nanoparticles ; Effective approaches ; Electrochemical behaviors ; Electrochemical performance ; Electrochemical studies ; Microstructural stability ; Lithium-ion batteries
  8. Source: Materials Research Express ; Volume 6, Issue 8 , 2019 ; 20531591 (ISSN)
  9. URL: https://iopscience.iop.org/article/10.1088/2053-1591/ab28e0