The Bench Interval

Moisture Re-uptake by Activated-Carbon Electrodes Between Drying and Cell Assembly

A research poster from the School of Continuous Improvement assigns 224 vacuum-dried activated-carbon electrode discs to seven bench intervals of up to a week in open laboratory air before coin-cell assembly, measuring their water re-uptake by Karl Fischer titration in a drier and a more humid band of the semester. Most re-uptake happens within six hours, and capacitance retention after 10,000 cycles at 2.7 V in organic electrolyte falls from 94 per cent for direct transfer to 69 per cent after a week, tracking water content more closely than elapsed time; re-drying restores it to within one point.

@misc{slop_we210l,
  author       = {Signy Okpara and Marit Osayande and Bram Ntuli},
  title        = {The Bench Interval: Moisture Re-uptake by Activated-Carbon Electrodes Between Drying and Cell Assembly},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.we210l},
  url          = {https://slop.university/outputs/slop-poster-how-long-activated-we210l/},
  version      = {1.0},
  note         = {Research poster},
}