Exact(49)
Serving as the supercapacitor electrodes, the resulting NiO@C@Cu2O NAs hybrid electrodes exhibited excellent performance, e.g. high specific capacitances of 2.18 F cm−2, and a superior long-cycle lifetime and high cycling stability (91.5% after 10,000 cycles).
MoNx/TiN NTA exhibited the capacitance retention ratio of 93.8% at 3.0 mA cm−2 after 1000 cycles, presenting high cycling stability.
Fast switching times and high cycling stability, up to 20000 cycles, are recorded.
The fabric electrode exhibits a discharge capacity of 51.7 mAh g−1 with high cycling stability (negligible decay after 100 cycles).
The VN/CNPs prepared at mass ratio of [V2O5]/[C3H6N6] of 1 10 had a slightly better electrochemical performances than that of the others, including the specific capacitance of 255.0 F g−1 at 1 A g−1, the wide potential window range of −1.15 to 0 V, and a relatively high cycling stability of 66%% after 1000 cycles.
Besides, the assembled asymmetric supercapacitors of CoSx/C hybrids//PCNFs show high energy density (15.0 W h kg−1 at power density of 413 kW kg−1) and high cycling stability (over 80% after 2000 cycles).
Similar(11)
The as-prepared composites showed desirable electrochemical characteristics, including high specific capacitances, low resistances, and high cycling stabilities.
Compared with pure LVP, LVP/G nanocomposites exhibited better electrochemical performance (118.4 mAhg−1 at 1C, and 112.1 mAhg−1 at 2C after 100 cycles) and higher cycling stability (97% capacity retention after 100 cycles at 1C, and 89.5% after 500 cycles at 20C) as cathode materials for Li ion batteries.
In summary, compared to Na3V2(PO4)3 microparticle [16], this Na3V2(PO4)3/C nanocomposite demonstrated comparable discharge capacity during the first cycle in aqueous SIBs but much higher cycling stability in subsequent cycling.
The graphene sheets not only increase the conductivity of Si material, but also function as a flexible scaffold for strains/stresses release and volume expansion during charge/discharge cycling process, resulting in much higher cycling stability (1500 mAh g1 after 100 cycles at a current density of 100 mA g1 with Coulombic efficiency >99%) compared to the native Si nanoparticles.
The α-Fe2O3@MnO2 core-shell heterostructures, especially the FM10020 containing 60.1 wt% of MnO2, exhibit a larger specific capacitance of 289.9 F g−1 at 1.0 A g−1, a better rate capability of 40.8% at 5.0 A g−1 and a higher cycling stability of 85.3% after 1200 cycles than the pure MnO2, highlighting the advantages of such unique configuration accompanied by the synergistic effect.
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