In situ growth of core-shell structure of tremella fuciformis shaped SnS@Sulfur doped carbon composite as anode materials for high performance lithium-ion batteries

Three-Dimensional Graphene-Wrapped CoSe2 Nanowires for High-Performance Asymmetric Supercapacitors

“…Furthermore, this observation was substantiated by the symmetrical GCD plots illustrated in Figure c. However, beyond this voltage range, the electrolyte would undergo an oxygen evolution reaction, resulting in a considerable increase in current density. , Therefore, it is preferable to limit the voltage window to 0–1.5 V. As the scan rate increased, the CV curves within the 0–1.5 V range exhibited battery-like pseudocapacitive behavior (Figure d). , The charge and discharge states of the ASC were evaluated using the GCD curve in Figure e, demonstrating high symmetry and coulombic efficiency even as the current density increased from 1 to 10 A g –1 . Based on the GCD curves at different current densities, the corresponding capacitance values were further calculated at 32.1, 30.3, 28.5, and 27 F g –1 for 1, 2, 5, and 10 A g –1 , respectively, as shown in Figure f.…”

“…However, beyond this voltage range, the electrolyte would undergo an oxygen evolution reaction, resulting in a considerable increase in current density. 44,63 Therefore, it is preferable to limit the voltage window to 0−1.5 V. As the scan rate increased, the CV curves within the 0−1.5 V range exhibited battery-like pseudocapacitive behavior (Figure 6d). 46,64 The charge and discharge states of the ASC were evaluated using the GCD curve in Figure 6e, demonstrating high symmetry and coulombic efficiency even as the current density increased from 1 to 10 A g −1 .…”

SnOxS2−x/GNS nanocomposites for reversible and high-capacity lithium-ion batteries

“…32 Because of the full reversibility of its Li + storage reactions, the initial coulombic efficiency of the SnOS/GNS composite can reach 73%, which is one of the highest records in the tin-based anode materials, as we know. 4,8,10,18,35,37–43 The second discharge and charge cycles almost maintain the reversible capacity of 1238 mA h g −1 (discharge) and 1168 mA h g −1 (discharge), and there is only a small loss of capacity (about 140 mA h g −1 ) in its first 20 cycles. The overlapped discharge–charge curves of the 20 th and 40 th cycles indicate its good cycling stability with a reversible capacity of ∼1070 mA h g −1 .…”

“…GNS composites can strongly improve the capacity, rate, and stability of active materials. Up to now, several tin oxides (sulfides)/GNS composites 13–18 have been obtained, but these composites also could not enable reaction (1) to be reversible and limit their reversible capacities and initial efficiency. In this paper, SnO x S 2− x /GNS nanocomposites are synthesized through an ultrasonic method, and the reversible Li + storage process is realized.…”

Microcubes of ZnSe–SnSe2 Encapsulated within Graphene for High-Performance Asymmetric Supercapacitors

“…However, it was observed that when the voltage exceeds this range, oxygen evolution reaction occurs in the electrolyte, leading to a significant increase in current density. 51 Therefore, it is best to limit the voltage to a maximum of 1.5 V. Figure 6e shows the tested CV curves of the device at different scan rates within the voltage range of 0−1.5 V. It is worth noting that the CV characteristics at various scan rates within the 0−1.5 V range also show no significant changes, indicating that the device exhibits excellent reversibility and good rate performance. Figure 6f depicts the GCD curves of the device at different current densities, showing a high specific capacity of 80.3 F g −1 at a current density of 1 A g −1 .…”