Data for: Selective CO₂-to-Electricity Conversion via Chemisorption-Coupled Ion Transport in Janus Chitosan-PEI Cryogel

This dataset contains the raw and processed experimental data supporting the manuscript "Selective CO₂-to-Electricity Conversion via Chemisorption-Coupled Ion Transport in a Janus Chitosan-PEI Cryogel." The data were collected from a Janus chitosan-polyethylenimine-sodium tripolyphosphate cryogel synthesized via a freeze-thaw process and tested for selective open-circuit voltage generation under CO₂, nitrogen, and ambient air exposure. Contents include: Open-circuit voltage (OCV) time-series measurements for four cryogel volumes (10, 12.5, 15, and 17.5 mL) and a PEI-free control, each under CO₂, N₂, and ambient air (n = 5 replicate trials per condition) Short-circuit current (Isc) time-series measurements Current-voltage (I–V) sweep data ATR-FTIR spectral data (transmittance vs. wavenumber) Nitrogen adsorption-desorption (BET/DFT) analysis report All electrical measurements were recorded using a Keithley 2400 source meter. Material characterization was performed by ATR-FTIR (Bruker Alpha II) and nitrogen adsorption analysis (Quantachrome NOVA).