A coacervate-based mixed-conducting binder for high-power, high-energy batteries

This data set accompanies the article "A Coacervate-Based
Mixed-Conducting Binder for High-Power, High-Energy Batteries"
published in ACS Energy Letters in 2023
(https://doi.org/10.1021/acsenergylett.3c00829). The article demonstrates
a strategy for imparting electronic and ionic conductivity to battery
binders, while also maintain facile processing capability. 
Polymer binders add crucial structural integrity to lithium ion battery
composite cathodes, but industry standard binders, such as polyvinylidene
fluoride (PVDF), are insulating to ions and electrons, detrimentally
adding resistance to the overall system. In this work, we use
electrostatics to stabilize a blend of a charged conjugated polymer with
an oppositely charged polyelectrolyte, providing a processable, stable
binder with high ionic and electronic conduction. Using LiFePO4 cathodes
as a model system, we show significant improvement in rate capability and
stability, with the conducting binder enabling a 39% utilization at 6C
compared to 1.6% when PVDF is the binder. Additionally, the conducting
binder affords a 63% capacity retention over 400 C/2 cycles, compared to
only a 6% retention over 400 cycles when PVDF is the binder. These results
show that electrostatically stabilized complexation is a promising
strategy to integrate both electronic and ionic conductivity into a
binder, while simultaneously maintaining stability and processability.
This data set contains the comprehensive electrochemical characterization
information- including cyclic voltammetry, galvanostatic intermittent
titration technique, variable rate cycling, cycle stability, and
ionic/electronic conductivity measurements. Data is presented in
non-proprietary txt and csv formats. Technique and sample identification
is contained in the file titles, which correspond to figure numbers. Every
column in each data file contains a header indicating the data that was
recorded and the unit in which it was recorded.