Core-sheath 3D printing of highly conductive and MoS2-loaded electrode with pseudocapacitive behavior

Surface‐Adaptive Capillarity Enabling Densified 3D Printing for Ultra‐High Areal and Volumetric Energy Density Supercapacitors

“…For symmetrical EDLC device performance, this translates to impressive areal and volumetric energy densities of 1.12/ 7.01 mWh cm À 2 and 1.24/7.79 mWh cm À 3 at 2 mA cm À 2 in aqueous/organic electrolyte, respectively. Notably, the best values for areal and volumetric energy densities realized in the organic solvent are significantly higher than all the Angewandte Chemie reported 3D printed supercapacitors, including EDLC [17,19,51,52,58] and pseudocapacitive [4,18,23,24,53,54] ones, and even rival thick aerogel supercapacitors [57,59] (Figure 5f). The specific data are listed in Table S2.…”

Surface‐Adaptive Capillarity Enabling Densified 3D Printing for Ultra‐High Areal and Volumetric Energy Density Supercapacitors

“…For symmetrical EDLC device performance, this translates to impressive areal and volumetric energy densities of 1.12/ 7.01 mWh cm À 2 and 1.24/7.79 mWh cm À 3 at 2 mA cm À 2 in aqueous/organic electrolyte, respectively. Notably, the best values for areal and volumetric energy densities realized in the organic solvent are significantly higher than all the Angewandte Chemie Forschungsartikel reported 3D printed supercapacitors, including EDLC [17,19,51,52,58] and pseudocapacitive [4,18,23,24,53,54] ones, and even rival thick aerogel supercapacitors [57,59] (Figure 5f). The specific data are listed in Table S2.…”

“…Besides, different from other puffy 3D electrodes, the packing density of the densified 3D printed electrode also stands up to an impressive level of 322.2 mg cm À 3 , which is 5-20 times higher than traditional 3D printed electrodes. [17,19,24,[51][52][53][54] Notably, the printed electrodes at such high loading and packing densities (hundreds of mg cm À 2 and mg cm À 3 ) deliver almost constant gravimetric and volumetric specific capacitances at a fixed current density (e.g., 113.2 F g À 1 and 36.4 F cm À 3 for the 16-layer electrode at the current density of 2 mA cm À 2 ) (Figure 4b), indicating an efficient utilization of the active materials. Both the lineally increased discharge time and integral area of cyclic voltammetry (CV) curves against printed layer numbers confirm the above conclusion (Figure S5).…”

“…As manifested in Figure 5c and d, the assembled device demonstrates an excellent rate performance (71.2 %, 2-100 mA cm À 2 ) and cycle stability (90.3 %, 100 mV s À 1 for 10 000 cycles). When compared with the high energy density systems in literature [4,17,19,23,24,[51][52][53][54]57] as represented in the radar plot (Figure 5e) and Table S2, the densified 3DPNG device delivers an overwhelming superiority in terms of loading density, packing density, areal capacitance, volumetric capacitance, and cycle stability, especially considering an ultrahigh loading density of up to � 290 mg cm À 2 . On the other hand, organic electrolyte with higher operating voltage can obtain higher energy density based on E = 1/2 C V 2 (where C is the capacitance and V is the operating voltage) than the aqueous electrolyte.…”

Electroassisted Core-Spun Triboelectric Nanogenerator Fabrics for IntelliSense and Artificial Intelligence Perception

“…19,20 In SF-FS systems, the structural fibers are usually composed of polymers while the functional sheaths are inorganic nanomaterials. 6,15,21,22 In comparison, the sheath in a SHF-FC is polymer based and the inner core is composed of functional components. 19,23−29 Nevertheless, both systems are only sensitive to quasi-static forces, such as stretching, bending, and twisting.…”