Various Charge Storage mechanisms

There are several mechanisms that can be used for charge storage in electrical and electronic devices, including:  

1. Capacitive storage: Capacitive storage, also known as electrostatic storage, involves storing electrical charge on the surface of a conductor. This is achieved by placing two conductive plates separated by an insulating material (the dielectric) in close proximity to each other, forming a capacitor. The charge on the conductor is proportional to the potential difference (voltage) between the two plates, and can be stored and released by applying a voltage across the capacitor.  
2. Inductive storage: Inductive storage involves storing electrical energy in a magnetic field. This is achieved by placing a coil of wire in a magnetic field and passing an electrical current through the coil, creating a magnetic field around the coil. The energy stored in the magnetic field can be released by passing a current through the coil in the opposite direction.  
3. Electrochemical storage: Electrochemical storage involves storing electrical energy in the form of chemical energy in a device such as a battery. In a battery, electrical energy is stored in the form of chemical reactions that occur between the electrodes and the electrolyte. The chemical reactions can be reversed by applying a voltage across the electrodes, allowing the stored energy to be released.
4. Mechanical storage: Mechanical storage involves storing electrical energy in the form of kinetic or potential energy in a device such as a flywheel. The energy is stored by applying a torque to the device, causing it to rotate or move, and can be released by allowing the device to rotate or move in the opposite direction.  

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a) EDLC or electric double layer capacitance: physical adsorption of ions characterized by square shaped CV (I = C dV/dt i.e., current proportional to scan rate) Example: Carbon 
Its usually termed as non faradic

b) Pseudocapacitance: surface redox reactions fast enough to produce nearly square shaped CV (current I is proportional to (scan rate)^x where x is close ~1. No peaks or very small redox peaks in CV with small (or no) peak separation Example: MnO2

c) Faradaic (Battery-like) capacity: Sluggish redox reactions with current 'I' usually proportional to (scan rate)^0.5. Well separated redox peaks in CV Example: Ni (OH)2; Li4Ti5O12

Materials with first two charge storage mechanisms fall under one category and are known as capacitive materials whereas materials with third mechanism are know as Faradaic/Battery materials

If you combine two different materials with capacitive mechanisms (EDLC or pseudocapacitance) then configuration is called Asymmetric Supercapacitor.  Example: carbon/carbon (two different carbon); C/MnO2

Capacitive material | Battery-like material
If you combine two materials; one capacitive type and one Battery type then it is called Hybrid Supercapacitor. Example: C/Ni(OH)2; C|Li4Ti5O12

(Capacitive material | Capacitive material)
It is unfortunate that the terms ‘‘asymmetric’’ and ‘‘hybrid’’ have been used in such an ambiguous manner in the literature