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Figure 7 Schematic representations of single electrode system (a) capacitor (b) battery and (c) an symmetric capacitor system with an aqueous electrolyte according to the charge-potential profile

Figure 7 Schematic representations of single electrode system (a) capacitor (b) battery and (c) an symmetric capacitor system with an aqueous electrolyte according to the charge-potential profile

Related Figures (11)

Figure 1 Ragone plot with Specific Energy and Power for different energy storage devices. Data from just complementary of typical batteries (Figure 1). to high currents and high specific power but to poor specific energy, a performance
Figure 1 Ragone plot with Specific Energy and Power for different energy storage devices. Data from just complementary of typical batteries (Figure 1). to high currents and high specific power but to poor specific energy, a performance
and to increase energy densities of conventional supercapacitors. Figure 2 Schematic diagram of three types of components used in the design of hybrid materials for
and to increase energy densities of conventional supercapacitors. Figure 2 Schematic diagram of three types of components used in the design of hybrid materials for
Figure 3 Black background outlines and ideal geometry with fractal granularity (see text). Inset shows Scanning Electron Micrographs of fractal granularity in LiFePO, materials (O. Ayyad, P. Gomez- Romero, unpublished results). should provide a combination of high energy and power for a given active materia
Figure 3 Black background outlines and ideal geometry with fractal granularity (see text). Inset shows Scanning Electron Micrographs of fractal granularity in LiFePO, materials (O. Ayyad, P. Gomez- Romero, unpublished results). should provide a combination of high energy and power for a given active materia
Figure 4 Cyclic voltammograms (top) and charge-discharge cycles (bottom) for different types of electrode materials: (a, b), Carbon-based double-layer supercapacitors. (c, d) Co304 pseudocapacitor. (e, f) LiFePO, battery electrode (vs. Li). The series shows the transition from a typical capacitive behavior (EDLC) (a, b) to a typical (two phase) battery electrode (c, d) with a pseudocapacitive oxide electrode as an intermediate case (e, f). It should be noted that even for the same Co30, material different degrees of capacitive and faradaic components can be appreciated depending on the specific microstructure of the active phase.”°
Figure 4 Cyclic voltammograms (top) and charge-discharge cycles (bottom) for different types of electrode materials: (a, b), Carbon-based double-layer supercapacitors. (c, d) Co304 pseudocapacitor. (e, f) LiFePO, battery electrode (vs. Li). The series shows the transition from a typical capacitive behavior (EDLC) (a, b) to a typical (two phase) battery electrode (c, d) with a pseudocapacitive oxide electrode as an intermediate case (e, f). It should be noted that even for the same Co30, material different degrees of capacitive and faradaic components can be appreciated depending on the specific microstructure of the active phase.”°
Hybrid material: battery-type and capacitor type materials combined in a hybrid electrode Figure 5 Schematic representations of different possible hybridization approaches between
Hybrid material: battery-type and capacitor type materials combined in a hybrid electrode Figure 5 Schematic representations of different possible hybridization approaches between
Figure 6 TEM image of the nanocomposite electrode formed by Li,gTis0,2 nanoparticles and CNF and (center).7° specific capacity of the electrode vs. Li anode showing excellent high-rate performance (Data from ref they were, in turn, applying the double hybridization approach shown in Figure 5
Figure 6 TEM image of the nanocomposite electrode formed by Li,gTis0,2 nanoparticles and CNF and (center).7° specific capacity of the electrode vs. Li anode showing excellent high-rate performance (Data from ref they were, in turn, applying the double hybridization approach shown in Figure 5
Figure 8 Cyclic voltammetry curves of aqueous asymmetric capacitors based on different metal oxides/hydroxides as positive electrode and reduced graphene oxide as negative electrode.
Figure 8 Cyclic voltammetry curves of aqueous asymmetric capacitors based on different metal oxides/hydroxides as positive electrode and reduced graphene oxide as negative electrode.
Figure 9 Schematic representation of various chemical synthetic routes used for the synthesis of
Figure 9 Schematic representation of various chemical synthetic routes used for the synthesis of
well capacitor component (q,=q1+q2)). Figure 10 Schematic representations of hybrid combination of hybrid electrode (hybridized battery and capacitor components) and capacitor electrode according to the charge-potential profile w total charge stored in the hybrid electrode is due to both components (battery (Q,) as
well capacitor component (q,=q1+q2)). Figure 10 Schematic representations of hybrid combination of hybrid electrode (hybridized battery and capacitor components) and capacitor electrode according to the charge-potential profile w total charge stored in the hybrid electrode is due to both components (battery (Q,) as
Figure 11 Ragone plot sketching the recent status of supercapacitors, asymmetric supercapacitors with aqueous and organic electrolytes as well as hybrid electrodes with hybrid devices.*° Also 3D network structure is beneficial to enhance the electron transport while
Figure 11 Ragone plot sketching the recent status of supercapacitors, asymmetric supercapacitors with aqueous and organic electrolytes as well as hybrid electrodes with hybrid devices.*° Also 3D network structure is beneficial to enhance the electron transport while
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Materials ScienceChemistryEnergy storage materialsElectrochemical Energy Storage DeviceSupercapacitors (Chemistry)Medicine
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