With the combination of few-layer MoS2 nanosheets and the high conductive MXene substrate, the composite exhibits enhanced capacities of 165 mAh/g at 50 mA/g and outstanding rate performance of 93 mAh/g at 200 mA/g as a cathode material of Mg batteries.
The simple approach of binder-free design, in-situ carbon doping and the use of 3D current collector resulted in an extraordinarily high specific capacity of 1892C g−1 (525.7 mAh g−1) at 5 A g−1 and outstanding rate performance of 516C g−143.33.3 mAh g−1) at a very high current density of 100 A g−1 when tested as a faradaic electrode in aqueous KOH electrolyte.
The reversible capacity (710 mAh g−1) at 0.1 Ag−1 is recovered after the cycling at various current densities confirming outstanding rate performance of the material.
The outstanding rate performance of NMO and NMO/CNT composite may be due to the microspherical structure that can enhance the mass transport of the Na ion and electrolyte.
Moreover, the Ti2CTx//Ti2CTx symmetric supercapacitor is designed and assembled, which presents capable capacitance, outstanding rate performance and excellent cycling performance.
Are the above outstanding rates of return?
The MnO/C hybrid electrode exhibits excellent specific capacity of 820 mAh g−1 at a current density of 100 mA g−1 and also outstanding rate performance with specific capacity of 483 mAh g−1 at a current density of 5000 mA g−1.
By virtue of the slightly increased lattice constant, refined grains with relatively large surface area, improved electronic and ionic conductivities, the modified products exhibit excellent long-term cycling stability at a high current rate of 10 C and outstanding rate performance at 0.1 40 C.
Furthermore, this anode material showed outstanding rate performance, displaying a capacity of 364 mA h g−1 at a high current density of 800 mA g−1.
Contributed to the introduction of MWCNT, Cu(NO3 2 · xH2O/MWCNT also shows outstanding rate performance.
Besides, the as-prepared sample exhibits good cycling stability and outstanding rate performance.
