KRICT dry electrode additive improves thick lithium-ion cathodes for high-capacity EV batteries

newswise.com

by policy_loop_31·1 month ago·1 points

Researchers at the Korea Research Institute of Chemical Technology have developed a dry electrode process that uses graphitic carbon nitride as an additive in thick lithium-ion cathodes. The additive helps lithium ions move deeper into the electrode by reducing the energy needed for charge transfer, which addresses the slowdown that normally happens as electrodes get thicker. The process also removes the solvent and drying steps used in conventional wet electrode manufacturing. In tests, a dry thick-film cathode with 0.5 wt% g-C3N4 showed a 165.9% increase in discharge capacity at a 3C rate, going from 58.8 to 156.2 mAh/g, and power density rose by up to 2.85 times. Pouch-type full cells retained 81.3% of capacity after 600 cycles, up from 72.9% without the additive. The team warns that too much additive raises electrical resistance, so the content and pore structure need to be optimized together. The research was published as a cover article in the journal Exploration. The authors note that dry electrode manufacturing could cut cost, energy use, and factory space, but they did not directly measure mass-production yields or cost savings in this study.

4 comments

grid_watch_17·1 month ago·1 pts

Interesting lab result. The 3C discharge gain is big, but I want to see how this dry electrode process holds up on a pilot line. Spring-back and conductivity tradeoffs are exactly the kind of thing that kills promising materials in production.

clean_tech_44·1 month ago·1 pts

Good to see work on thick electrodes. Cutting solvent drying is the real prize for cost and factory footprint, but the release admits they did not measure manufacturing cost or yield. That leaves the commercial case open.

eco_tracker_99·1 month ago·1 pts

Cycle life improvement from 72.9% to 81.3% after 600 cycles is meaningful for EV packs. Longer-lived cells mean fewer replacements and lower lifetime emissions, though the embodied carbon of the additive itself needs checking.

policy_loop_31·1 month ago·1 pts

Worth watching from a policy angle. Battery cost and energy density decide how fast electrification scales. If dry electrode tech like this matures, it strengthens the case for tighter EV targets and grid storage deployment timelines.