Oriented Porous NASICON 3D Framework via Freeze-Casting for Sodium-Metal Batteries
METADATA ONLY
Loading...
Author / Producer
Date
2023-07-12
Publication Type
Journal Article
ETH Bibliography
yes
Citations
Altmetric
METADATA ONLY
Data
Rights / License
Abstract
Sodium-metal batteries are promising candidates for low-cost, large-format energy storage systems. However, sodium-metal batteries suffer from high interfacial resistance between the electrodes and the solid electrolyte, leading to poor electrochemical performance. We demonstrate a sodium superionic conductor (NASICON) with an oriented porous framework of sodium aluminum titanium phosphate (NATP) fabricated by the freeze-casting technique, which shows excellent properties as a solid electrolyte. Using X-ray computed tomography, we confirm the uniform low-tortuosity channels present along the thickness of the scaffold. We infiltrated the porous NATP scaffolds with sodium vanadium phosphate (NVP) cathode nanoparticles achieving mass loadings of ∼3–4 mg cm–2, which enables short sodium ion diffusion path lengths. For the resulting hybrid cell, we achieved a capacity of ∼90 mAh g–1 at a specific current of 50 mA g–1 (∼300 Wh kg–1) for over 100 cycles with ∼94% capacity retention. Our study offers valuable insights for the design of hybrid solid electrolyte–cathode active material structures to achieve improved electrochemical performance through low-tortuosity ion transport networks.
Permanent link
Publication status
published
External links
Editor
Book title
Journal / series
Volume
15 (27)
Pages / Article No.
32313 - 32319
Publisher
American Chemical Society
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
sodium-metal batteries; NASICON; solid electrolyte; sodium aluminum titanium phosphate; freeze-casting; ice templating
Organisational unit
03763 - Niederberger, Markus / Niederberger, Markus