It has demonstrated that the optimized PGCs electrode exhibits 310.7 F g−1 at the current density of 1.5 A g−1 and an excellent cycle stability with a capacitance retention of 99% after 15,000 cycles.
The resulting electrode membrane exhibited a specific capacitance as high as 484 F g-1 at a current density of 0.1 A g−1 with an excellent cycle life stability.
It was found that as supercapacitors' electrode materials, these nanoporous carbons exhibit a capacitance as high as 272 F g-1 at 0.1 A g−1, and an excellent cycle life (almost no attenuation after 10,000 cycles).
The optimized sample exhibited uniform sheet-like morphology with a thickness of ∼50 nm and a large surface area and pore volume, which achieves a high specific capacitance of 139.2 mAh g−1 at a current density of 1.0 A g−1, a good rate capability and an excellent cycle stability.
The synergistic effect of high porosity, heteroatomic doping and good dispersity of NG-HCP nanosheets make them suitable as excellent anode materials for Li-ion batteries (LIBs), leading to an extremely high reversible capacity of 1320 mAh g−1 (at 20 mA g−1), a good rate performance, and an excellent cycle life with an approximate 100% Coulombic efficiency for more than 600 cycles.
The W18O49 nanowires, assembled on carbon felt, exhibit a high capacity of 588.33 F/g at a current density of 1 A/g together with an excellent cycle performance, and a low internal resistance during the electrochemical tests.
proposed powerful designs in a lithium-oxygen battery that offers an excellent cycle life in air-like atmosphere, a step closer to true lithium-air batteries.
In particular, the disordered octahedral LNMO particles that are composed of mixed particle sizes ranging from of 1 to 5 μm show not only the best rate capability and specific discharge capacity but also an excellent cycle stability with a capacity retention of 89% (corresponding to specific discharge capacity of 105 mA h g−1) at a 10 C cycling rate, even after 1000 cycles.
This composite electrode exhibits superior electrochemical performances including a high reversible capacity of 654 mAh g−1 with well controlled electrode swelling of 62% at fully charged state, an excellent cycle stability with a capacity retention of 93.4% after 100th cycle at 50 mA g−1 for sodium ion batteries.
The Fe C electrodes showed good mechanical stability and an excellent cycle performance with an average stable capacity of 221 mand−1, and 85% capacity retention for up to 50 cycles.
