Scalable wet-slurry fabrication of sheet-type electrodes for sulfide all-solid-state batteries and performance enhancement via optimization of Ni-rich cathode coating layer

All-solid-state Li or Li-ion batteries (ASSLBs) have attracted much attention due to their potential high energy density, high safety, and low manufacturing costs compared to commercial liquid electrolyte Li-ion batteries. However, the rate capacity and cycling performance could not satisfy the practical application. Here, an island-like amorphous Li₂O–ZrO₂ (LZO) was coated on the surface of LiNi₀.₈₈Co₀.₁₀Al₀.₀₂ (NCA) via a sol-gel method and low-temperature sintering. The electrochemical performance and density functional theory calculation results demonstrate that the LZO coating layer significantly boosts Li-ions transfer. Targeting large-scale production, a sheet-type cathode was prepared by a wet-slurry process with PVDF-HFP as a binder, which exhibits an initial specific capacity of 181.91 mAh·g⁻¹ at 0.1C and 25 °C. Remarkably, the wet-slurry cathode with a high NCA loading of 20 mg cm⁻² delivers an initial areal capacity of 2.936 mAh·cm⁻² and capacity retention of 69.93% after 1000 cycles at a rate of 0.5C. By employing X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy, the authors reveal that the LZO coating layer and PVDF-HFP binder inhibited the decomposition of sulfide electrolyte and detrimental structure evolution of NCA active material. This work would guide designing high-performance ASSLBs for practical application and commercialization.

• Record URL:
  https://doi.org/10.1016/j.etran.2023.100252
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S2590116823000279
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/25901168
• Supplemental Notes:
  • © 2023 The Authors. Published by Elsevier B.V. Abstract reprinted with permission of Elsevier.
• Authors:
  • Gao, Jing
  • Hao, Jinghua
  • Gao, Yuan
  • Sun, Xiaolin
  • Zhang, Yuan
  • Song, Depeng
  • Zhao, Qing
  • Zhao, Fuhua
  • Si, Wenyan
  • Wang, Kun
  • Ohsaka, Takeo
  • Matsumoto, Futoshi
  • Wu, Jianfei
  • 0000-0002-1420-3947
  • Xie, Haijiao
• Publication Date: 2023-7

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: 100252
• Serial:
  • eTransportation
  • Volume: 17
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 2590-1168
  • Serial URL: https://www.sciencedirect.com/journal/etransportation

Subject/Index Terms

• TRT Terms: Battery electrodes; Cathodes; Lithium batteries; Nickel; Slurry; Solid state electronics
• Subject Areas: Energy; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01885276
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 20 2023 10:09AM