FeCo2O4@FeCo2S4 core-shell nanospheres intercalating into Ti3C2Tx for high-performance all-solid-state supercapacitors

Remarkable Conductivity Design of FeCo2S4/MXene 2D Membrane Electrodes for Advanced Pseudocapacitance Characteristic Behavior

“…The near-vertical Warburg (W) curves declared that electrolyte ions were more accessible to the FeCo 2 S 4 /MXene surface. The oriented FeCo 2 S 4 could act as a “spacer” to effectively inhibit the restacking of the MXene sheets, resulting in larger SSAs to facilitate the diffusion of electrolyte ions …”

“…The oriented FeCo 2 S 4 could act as a "spacer" to effectively inhibit the restacking of the MXene sheets, resulting in larger SSAs to facilitate the diffusion of electrolyte ions. 22 The cyclic stability test results of FeCo 2 S 4 /MXene composites and FeCo 2 S 4 are shown in Figure 12. The capacitance retention of FeCo 2 S 4 /MXene composites still remained 90.5% after 10,000 cycles at 5 A g −1 , which was superior than that of FeCo 2 S 4 (88.1%).…”

“…20 Recently, FeCo 2 S 4 has been identified as a superior pseudocapacitive material to NiCo 2 O 4 due to the higher electrochemical activity of Fe 2+ in redox reactions. 21,22 Since the development of FeCo 2 S 4 -based electrodes is uncommonly documented, the search for FeCo 2 S 4 electrodes with unique structures and impressive capacitive properties is becoming more critical. However, FeCo 2 S 4 is confronted with inferior electrical conductivity.…”

“…So, it has great potential for building high-performance SC electrode materials . Recently, FeCo 2 S 4 has been identified as a superior pseudocapacitive material to NiCo 2 O 4 due to the higher electrochemical activity of Fe 2+ in redox reactions. , Since the development of FeCo 2 S 4 -based electrodes is uncommonly documented, the search for FeCo 2 S 4 electrodes with unique structures and impressive capacitive properties is becoming more critical. However, FeCo 2 S 4 is confronted with inferior electrical conductivity. , In view of this, the integration of FeCo 2 S 4 with highly conductive substances offers a viable solution to overcome its inherent limitations, thereby enhancing its conductivity to a considerable extent. − …”