The GF, described as the ratio of relative change in electrical resistance FRC with strain , is shown in Figs 2e-g, while the SI file, section S3, contains graphs showing the FRC and tensile stress  functions  overlapping. All studied samples show an increase in resistance with elongation, yet the changes in resistance strongly depend on the conductive stripe thickness and, expectedly, are the highest for the narrowest conductive path 3DP_1 (1 mm). Here, alternative charge flow paths could not occur, as with wider samples, even leading to a lack of conductivity for one of the samples. For 3DP_3 and 3DP_5 electrodes with 3 and 5 mm wide stripes, the applied stresses did not result in the formation of breaks interrupting the electrical conductivity in the structure. This is essential information considering the design of the conductive connection in the electrochemical cell. Notably, the measurement itself may decrease the resistance value due to the temperature change under continuous current flow , where the samples with the smallest cross-sectional area were affected the most, where R decreased by 3% within 5 minutes. These results are summarised in the SI file, Fig. S6 .