I came across this study today about 3D printable batteries. Part of the abstract reads:
Tuning...properties of SCE paste and electrode slurry toward thixotropic fluid characteristics, along with well-tailored core elements including UV-cured triacrylate polymer and high boiling point electrolyte, is a key-enabling technology for the realization of PRISS batteries.
Translation, they produce a solid-state composite electrolyte (SCE) mixture of a UV-curable acrylate-based polymer and a lithium-based electrolyte, with or without the addition of electrode active material powders, to produce the anode and cathode components.
More detailed info on the actual chemical composition of the SCE and electrode materials found here:
The SCE matrix precursor, which was composed of UV-curable ethoxylated trimethylolpropane triacrylate (ETPTA) monomer 20,35 (incorporating 1.0 wt % 2-hydroxy-2-methyl-1-phenyl-1-propanone (HMPP) as a photoinitiator) and high boiling point electrolyte (1/1 v/v of 1 M LiPF6 in ethylene carbonate (EC, bp = 261 °C)/propylene carbonate (PC, bp = 242 °C)) wherein the composition ratio of ETPTA/high boiling point electrolyte = 15/85 (w/w) was mixed with electrode active materials (here, LiFePO4 (LFP, cathode) and Li4Ti5O12 (LTO, anode) powders were chosen as model electrode active materials to explore the proof of concept for PRISS cells) and carbon black conductive additives.
Here's the paper in full. Pretty cool technology though -- to wear our electronics!
PRISS-3D print batteries.pdf (659.8 KB)