Low‐Resistive LiCoO2/Li1.3Al0.3Ti2(PO4)3 Interface Formation by Low‐Temperature Annealing Using Aerosol Deposition. Issue 5 (16th March 2021)

• Record Type: Journal Article
• Authors: Sakakura, Miyuki; Suzuki, Yasuhiro; Yamamoto, Takayuki; Yamamoto, Yuta; Motoyama, Munekazu; Iriyama, Yasutoshi
• Is Part Of: Energy technology. Volume 9:Issue 5(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-03-16
• Subjects: aerosol deposition -- all-solid-state batteries -- interfaces -- non-negative matrix factorization spectra analysis -- TEM–EELS; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.202001059
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract : Interfacial resistance at electrode‐high Li + conductive solid electrolytes must be reduced well to develop high‐power all‐solid‐state batteries using oxide‐based solid electrolytes (Ox‐SSBs). Herein, crystalline electrode films of LiCoO2 (LCO) are formed on a high Li + conductive crystalline‐glass solid electrolyte sheet, Li1.3 Al0.3 Ti2 (PO4 )3 (LATP) ( σ 25 °C = 1 × 10 −4 S cm −1 ), at room temperature by aerosol deposition (AD), and the effects of the annealing temperature on the interfacial resistivities ( R int ) at the LCO/LATP are investigated. The R int visibly increases by annealing over 500 °C with the growth of Co3 O4 as a reactant. In contrast, R int is reduced to ≈100 Ω cm 2 by low‐temperature annealing at 250–350 °C due to superior contact through the structural rearrangement of an artificial metastable interface formed by the AD. These results are applied to bulk‐type Ox‐SSB, Li/Li7 La3 Zr2 O12 (LLZ)/LCO–LATP, and our best Ox‐SSB delivers a discharge capacity of 100 mA cm −2 at 100 °C. Abstract : Low‐resistive LiCoO2 –Li1.3 Al0.3 Ti2 (PO4 )3 (LATP) interface is realized by low‐temperature annealing (250–350 °C) via structural rearrangement of an artificial metastable interface by aerosol deposition. This low‐temperature annealing is applied to develop a bulk‐type oxide‐based solid‐state‐battery delivering discharge capacity at 100 mA cm −2 at 100 °C.