Tape casting manufacturing of thick Li4Ti5O12 ceramic electrodes with high areal capacity for lithium-ion batteries Articles uri icon

publication date

  • January 2021

start page

  • 1025

end page

  • 1032

issue

  • 1

volume

  • 41

International Standard Serial Number (ISSN)

  • 0955-2219

Electronic International Standard Serial Number (EISSN)

  • 1873-619X

abstract

  • In this work we report the preparation of additive-free ceramic Li4Ti5O12(LTO) electrodes with high thickness(∼250μm) by the conventional tape casting method followed by binder removal and sintering. By optimizingthe sintering process, high porosity (25–35 %), needed for a good electrolyte wetting, was achieved. In addition,the use of an Ar/H2reducing atmosphere during the thermal treatments increases the required electronicconductivity of the sintered electrode due to the combination of a carbon coating coming from incomplete binderdecomposition and the partially reduction of Ti4+. Due to the absence of binders, thefinal electrode has almost100 wt. % active material, leading to very high volumetric (250 mA h cm−3) and areal (6−8mA h cm-2) ca-pacities. This process paves the way for large-scale production of thick electrodes with applications in all-solid-state batteries (ASSBs), leading to more safety lithium-ion batteries (LIBs).

keywords

  • all-solid-state batteries; binder-free; high areal capacity; tape casting; thick electrode