(530e) Identifying Layered Double Hydroxides for Electrochemical Anion Intercalation

Identifying Layered Double Hydroxides for
Electrochemical Anion Intercalation

Matthias J. Young, Nicholas M. Bedford, Tatyana Kiryutina, Taylor J. Woehl

Applied Chemicals and Materials Division, Materials Measurement
Laboratory, National Institute of Standards and Technology, Boulder, CO

Electrochemical anion intercalation is a
developing field which promises to enable rapid electrochemical desalination
and open a new frontier for anion-based battery technology. Layered double
hydroxides (LDHs) are common anion exchange materials with atomic structures
similar to naturally-occuring clays, and have
garnered recent interest in the electrochemical community due to their
catalytic and corrosion-resistant properties. In this work, we examine whether
the interlayer anions in LDHs are capable of reversibly incorporating under
applied electrical bias. We have employed atomistic materials simulations to
model the electrochemical properties of LDH structures with multivalent metal
centers. From this modeling we identified candidate compositions of the LDHs to
be experimentally evaluated for anion intercalation. LDH nanoplates
were synthesized using coprecipitation and evaluated
as electrode materials for anion intercalation using in situ
electrochemical quartz crystal microbalance and in situ synchrotron
characterization techniques.