Dataset Supporting Mechanistically Resolved Thermal–Surfactant Delamination of Spent LiFePO₄ and LiCoO₂ Cathodes for Low-Aluminum Powder Recovery and Regeneration

Peel files provide time, displacement and force data for pristine electrodes and specimens treated at 200, 240, 280, 320 and 350 °C. Optical files cover pristine, 240 °C and 280 °C specimens from 0 to 90 min. Maximum delamination was 98.11% for LFP and 96.19% for LCO at 300 °C, 3.0% (v/v) and 90 min. At 280 °C, normalized peel strength fell from 270 to 49 N m−1 for LFP and from 295 to 65 N m−1 for LCO, demonstrating weakening before washing.

The 280 °C specimen reached approximately 95% detached area within 28 min. The coupon data may be used for factorial modelling; peel traces for force-displacement analysis; and masks for detached-area kinetics. There is also electrochemical impedance spectroscopy (EIS) data used to compare electrodes prepared from fresh, integrated mechanical–chemical method (IMCM)-recovered, and relithiated lithium cobalt oxide (LCO) and lithium iron phosphate (LFP) powders.

Measurements were collected at open-circuit potential using a 10 mV RMS perturbation from 100 kHz to 0.1 Hz, with 10 points per decade. The Excel workbook provides Nyquist coordinates (Z′ and −Z″) and derived Bode quantities (|Z|, phase, and −phase). The LFP sheets include replicate measurements and mean ± standard deviation values; the LCO sheets contain the available traces for each condition.

A separate worksheet provides guidance for reproducing the plots in OriginPro. FILE DESCRIPTION EIS Data.xlsx — Six-sheet workbook containing a dataset overview, LCO and LFP Nyquist data, LCO and LFP Bode data, and an OriginPro plotting guide.