wearable solid-state zab properties

wearable solid-state zab properties
since the sample fen₄-ti₃c₂sₓ exhibited high orr activity, the article further used the developed fen₄-ti₃c₂sₓ catalysts with alkali-resistant dual-network pana and cellulose hydrogel (pana-cellulose ) as stretchable solid electrolytes to jointly construct a stretchable and abrasion-resistant fibrous zab.fig. 4a illustrates that it can be stretched over 1000% strain without any fracture and visible cracks, with excellent tensile properties. the structure of the fibrous zab is shown in fig. 4 b. a hydrogel electrolyte was used to first wrap the zn spring electrode, then stretch it, and finally wrap the fen₄-ti₃c₂sₓ-loaded carbon paper as the air electrode. the charging and discharging curves and corresponding power densities of the fibrous zab in the initial and 800% stretched states are shown in fig. 4c, d. the maximum power density of the zab in the initial state is 133.6 mw-cm-², and that of the zab in the stretched state at 800 ℃ is 182.3 mw-cm-². indicating that the cell is stretchable and has good electrochemical performance in the stretched state. in addition, the cell exhibits excellent cycling stability with a stable cycling of 110 h at 2 ma cm-², as shown in fig. 4e. to demonstrate its wear resistance, two fiber-shaped zabs with a length of 10 cm and a diameter of 2 mm were woven into a wristband and attached to a glove as shown in fig. 4f and g. the wristband was made of a fiber-shaped zab with a diameter of 2 mm. this wristband can power a set of leds on the wearing gloves, demonstrating the feasibility of this highly efficient stretchable and wearable fiber-shaped zab based on the prepared fen₄-ti₃c₂sₓ catalyst.

tensile stress versus strain curves of the prepared pana-cellulose hydrogel, and the inset shows optical photographs of this hydrogel electrolyte in the initial and stretched states; (b) schematic diagram of the stretchable fibrous zab; (c) charge-discharge curves of the fibrous zab in the initial and 800% stretched states; (d) discharge and power density curves of the fibrous zab in the initial and 800% stretched states ; (e) cycling stability test of fiber-shaped zabs at 2 ma cm-²; (f) photographs of two fiber-shaped zabs (length: 10 cm, diameter: 2 mm) woven into a wristband; (g) photographs of this wristband attached to a glove; (h) photographs of this wristband attached to a glove to supply power to a set of leds

source of orr electrocatalytic activity

in the article, the energy band structures of fen₄-ti₃c₂ and fen₄-ti₃c₂sₓ samples were investigated using ups. as shown in fig. 5a, the cutoff energy of fen₄-ti₃c₂ is 17.1 and that of fen₄-ti₃c₂sₓ is 17.23. further estimation of the figure of merit function (φ) and valence band maxima (ev) reveals that, compared with fen₄- ti₃c₂ compared to fen₄-ti₃c₂sₓ the reduction of φ and ev shifts to lower energies, indicating that the addition of the s-terminal to the ti₃c₂ carrier results in the spatial stabilization of the electrons within the fen₄ part, and a change of the center of the 3d band of energy of fe(ii) . in addition, the corresponding effective magnetic moments (µ) shown in fig. 5c indicate that the µ effect for sample fen₄-ti₃c₂sₓ is larger than that for sample fen₄-ti₃c₂, and that the large µ effect suggests that the number of unpaired d electrons is greater for fe(ii) in the sample. in addition, dft calculations show that the introduction of the s-terminus can increase the in situ magnetic moment of the fe center and modulate the spin state of fe(ii) in the fen₄ fraction (the intermediate spin state is transformed into the high spin state), resulting in the fe 3d electron delocalization and upward shifting of the d-band centers thereby optimizing the orbital hybridization of fe 3d with the p orbitals of oxygen-containing moieties, which can enhance the molecular oxygen adsorption, indicating that the fen₄-ti₃c₂sₓ system has a good catalytic activity for orr, which is in good agreement with the experimental results.