A single-ion transport interfacial layer for solid-state lithium batteries

Chesta, C and Kalleshappa, B and Austeria P, M and Sampath, S (2024) A single-ion transport interfacial layer for solid-state lithium batteries. In: Electrochimica Acta, 507 .

	PDF Ele_Act_Vol_507_2024.pdf - Published Version Restricted to Registered users only Download (4MB) | Request a copy
	Microsoft Word Ele_Act_Vol_507_Sup_2024.docx - Published Supplemental Material Restricted to Registered users only Download (3MB) | Request a copy

Abstract

All-solid-state batteries possess several advantages including high safety, flexibility to use high-capacity metal anodes and are projected to be the next generation energy storage devices. Garnet-type cubic Li7La3Zr2O12 (LLZO) solid electrolyte is of particular interest due to its high ionic conductivity under ambient conditions and compatibility with Li metal. However, large electrode/electrolyte interfacial resistance constraints their development. Herein, the use of a highly lithium ion conducting dilithium phthalocyanine (Li2Pc) in ionic liquid as an interlayer is proposed to effectively suppress the high impedance at the interface thus improving the electrode-electrolyte contact. Fast Li+ mobility and high dielectric constant of dilithium phthalocyanine enhance the kinetics of Li+ transport across the interface. A significant reduction in overpotential and very stable stripping/plating cycling are observed in lithium symmetric cells upon introducing Li2Pc interlayer as compared to the use of bare tantalum doped lithium lanthanum zirconium oxide (LLZTO) electrolyte. Cells comprising interlayer-modified Li|LLZTO|LiFePO4 show high capacity with excellent cycling and rate capability. The performance of full cells using lithiated graphite and lithium titanate anodes has also been evaluated. This study presents a promising application of garnet electrolytes towards the advancement of solid-state lithium batteries. © 2024 Elsevier Ltd

Item Type:	Journal Article
Publication:	Electrochimica Acta
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the publishers.
Keywords:	Lanthanum oxides; Lithium batteries; Lithium compounds; Solid electrolytes; Tantalum oxides; Zirconium compounds, All-solid-state battery; Dilithium phthalocyanine; High capacity; High-capacity; Interfacial modification; Interlayer; Li +; LLZTO; Single ion; Solid-state lithium batteries, Solid-State Batteries
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	30 Oct 2024 05:21
Last Modified:	30 Oct 2024 05:21
URI:	http://eprints.iisc.ac.in/id/eprint/86584

Actions (login required)

View Item