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Seminar: Fast Charge Transfer via Dielectric Interface in Rechargeable Batteries

Associate Professor at the Tokyo Institute of Technology, Okayama University, Japan, Takashi Teranishi will give a seminar entitled "Fast Charge Transfer via Dielectric Interface in Rechargeable Batteries" on October 25, 2022 at 10:30 a.m. Professor Teranishi is the guest of the INRS professor My Ali El Khakani.

October 25, 2022

From 02:00 pm to 03:00 pm

Énergie Matériaux Télécommunications Research Centre

1650 Lionel-Boulet Blvd.

Varennes, Quebec  J3X 1P7

In attendance: Tudor-Johnston Conference Room (#2422)

Open to the academic and scientific community

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Lithium ion batteries (LIBs) with drastically enhanced power densities enable excellent acceleration and better fuel saving in cars of the automotive industry. Those batteries are thus promising candidates to power next-generation vehicles, contributing a future sustainable society. A breakthrough involving dielectric polarization to assist ultrahigh rate capability of the LIBs is newly proposed. It is related with the use in the batteries of dielectric nanoparticles having moderate dielectric constant as an artificial solid electrolyte interfaces, SEIs1-6). Experimental and computational results proved that, when the permittivity of the dielectric layers and solvent are similar, solvated Li are preferentially involved in the adsorption and desolvation process on the dielectric surface, followed by Li intercalation near the dielectrics-active materials-electrolyte triple phase interface (TPI)5). High rate capabilities of LIBs are efficiently further strengthened with increasing TPI density for nano-cube (NC) BaTiO3 modified cathodes6). The dielectric NCs displayed high dispersibility in nonpolar solvents, which is attributed to a surface steric-hindrance effect originating from the bulky oleic acid molecules adsorbed on the NC surfaces. High dispersibility of the NCs improved the TPI density, which provided more electron exchange sites and resulted in faster Liion intercalation and deintercalation. Physical nanodecoration of BaTiO3 onto active materials via the pulsed laser deposition (PLD) also drastically improved the high rate capability owing to large TPI density.7) Mentioned dielectric SEI architecture will is currently utilized for all-solid state lithium ion batteries as well.

1) JP patent: P2016-149270A
2) Appl. Phys. Lett., 105, 143904 (2014).
3) Adv. Electron. Mater. 4, 1700413 (2018).
4) Nano Lett., 19, 1688 (2019).
5) J. Power Sources 494, 229710 (2021).
6) Adv. Mater. Interfaces 9, 2101682 (2022).
7) J. Appl. Phys. 131, 124105 (2022).