Mechanical alloying synthesis of Ni 3 S 2 nanoparticles as electrode material for pseudocapacitor with excellent performances

Facile synthesis of CoNi 2 S 4 /Co 9 S 8 composites as advanced electrode materials for supercapacitors

“…According to intrinsic energy storage mechanism, supercapacitors can be divided into electric double layer capacitors (EDLCs) and pseudocapacitors [8][9]. The capacitance of EDLCs relies on the physical absorption/desorption of electrostatic charges from the surface of active materials, but pseudocapacitors can exhibit much higher specific capacitance through reversible Faradic reaction between electrode materials and electrolytes [8,[10][11][12][13].…”

Facile Synthesis of Ag‐Decorated Ni3S2 Nanosheets with 3D Bush Structure Grown on rGO and Its Application as Positive Electrode Material in Asymmetric Supercapacitor

“…Encouragingly, the NF@rGO/Ag/Ni 3 S 2 //N‐G ASC delivers a high energy density of 28.7 W h kg −1 at a power density of 425 W kg −1 with the voltage window of 1.7 V, and still maintains at 20.2 W h kg −1 at a power density of 6799.3 W kg −1 . This impressive results are much higher than those of similar SCs reported recently, such as Ni 3 S 2 //pen ink (8.2 W h kg −1 at 214.6 W kg −1 ), ppy@Ni 3 S 2 //AC (17.5 W h kg −1 at 179.3 W kg −1 and 8.7 W h kg −1 at 3587.4 W kg −1 ), Ni 3 S 2 @CoS//AC (23.7 W h kg −1 at 268.9 W kg −1 ), Ni 3 S 2 /MWCNT‐NC//AC (19.8 W h kg −1 at 798 W kg −1 ), Ni 3 S 2 //AC (36 W h kg −1 at 400 W kg −1 and 20.6 W h kg −1 at 2390 W kg −1 ) …”

Three dimensional Ni3S2 nanorod arrays as multifunctional electrodes for electrochemical energy storage and conversion applications

“…[42][43][44] Li et al synthesized Ni 3 S 2 nanoparticles by simple mechanical alloying as the electrode for a supercapacitor. 45 The supercapacitor demonstrated a specic capacitance of 911 F g À1 at 0.5 A g À1 . However, there is signicant gap between its actual and theoretical capacitance.…”