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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.
103 views reported since publication in 2023.