High mass loading additive-free LiFePO4 cathodes with 500 mum thickness for high areal capacity Li-ion batteries Articles uri icon

publication date

  • May 2020

start page

  • 1

end page

  • 12

issue

  • (228033)

volume

  • 458

International Standard Serial Number (ISSN)

  • 0378-7753

Electronic International Standard Serial Number (EISSN)

  • 1873-2755

abstract

  • We report the preparation of thick ceramic electrodes of the olivine LiFePO4 (LFP) with high mass loading. These electrodes are preparated by means of Powder Extrusion Moulding (PEM), which is a technology easily scalable and cheap. These LFP cathodes are additive-free (neither binder nor extra carbon black) with ~0.5 mm thickness, allowing to develop very high areal capacity (13.7 mA h cm−2). By means of a strict control of sintering process, the carbon coating of the commercial LFP powder remains and the decomposition of the active material is prevented. The optimized self-supported LFP cathode presents good cyclability over 20 cycles at C/10 with no capacity loss. The good electrochemical performance of these novel LFP thick electrodes and their non-flammability make them interesting candidates for both mobile and stationary applications.

keywords

  • thick electrode; binder-free; solvent-free; areal capacity; high mass loading