Low temperature hydrothermal synthesis of battery grade lithium iron phosphate
Open access
Date
2017-03Type
- Journal Article
Abstract
Lithium ion transport through the cathode material LiFePO4 (LFP) occurs predominately along one-dimensional channels in the [010] direction. This drives interest in hydrothermal syntheses, which enable control over particle size and aspect ratio. However, typical hydrothermal syntheses are performed at high pressures and are energy intensive compared to solid-state reactions, making them less practical for commercial use. Here, we show that the use of high precursor concentrations enables us to achieve highly crystalline material at record low-temperatures via a hydrothermal route. We produce LFP platelets with thin [010] dimensions and low antisite defect concentrations that exhibit specific discharge capacities of 150 mA h g−1, comparable to material produced with higher temperature syntheses. An energy consumption analysis indicates that the energy required for our synthesis is 30% less than for typical hydrothermal syntheses and is comparable to solid-state reactions used today, highlighting the potential for low temperature hydrothermal synthesis routes in commercial battery material production. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000239144Publication status
publishedExternal links
Journal / series
RSC AdvancesVolume
Pages / Article No.
Publisher
Royal Society of ChemistryOrganisational unit
03895 - Wood, Vanessa / Wood, Vanessa
More
Show all metadata