High dielectric barium titanate porous scaffold for efficient Li metal cycling in anode-free cells

Chao Wang, Ming Liu, Michel Thijs, Frans G.B. Ooms, Swapna Ganapathy, Marnix Wagemaker*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Downloads (Pure)

Abstract

Li metal batteries are being intensively investigated as a means to achieve higher energy density when compared with standard Li-ion batteries. However, the formation of dendritic and mossy Li metal microstructures at the negative electrode during stripping/plating cycles causes electrolyte decomposition and the formation of electronically disconnected Li metal particles. Here we investigate the use of a Cu current collector coated with a high dielectric BaTiO3 porous scaffold to suppress the electrical field gradients that cause morphological inhomogeneities during Li metal stripping/plating. Applying operando solid-state nuclear magnetic resonance measurements, we demonstrate that the high dielectric BaTiO3 porous scaffold promotes dense Li deposition, improves the average plating/stripping efficiency and extends the cycling life of the cell compared to both bare Cu and to a low dielectric scaffold material (i.e., Al2O3). We report electrochemical tests in full anode-free coin cells using a LiNi0.8Co0.1Mn0.1O2-based positive electrode and a LiPF6-based electrolyte to demonstrate the cycling efficiency of the BaTiO3-coated Cu electrode.

Original languageEnglish
Article number6536
Number of pages11
JournalNature Communications
Volume12
Issue number1
DOIs
Publication statusPublished - 2021

Fingerprint

Dive into the research topics of 'High dielectric barium titanate porous scaffold for efficient Li metal cycling in anode-free cells'. Together they form a unique fingerprint.

Cite this