Identification of self-discharge mechanisms of ionic liquid electrolyte based supercapacitor under high-temperature operation

A Highly Efficient Graphene Gold Based Green Supercapacitor Coin Cell Device for Energy Storage

“…During the first few minutes the predominant model is the divided potential driving (DPD) as shown in red in the graph. The rapid decrease in voltage is due to the interaction of the electrolyte ions with the front layers of the electrode material that induces a high energy loss (Zhang et al, 2011b;Chen et al, 2014;Haque et al, 2021). After the first 10 min the predominant model is the single potential driving (SPD) which is shown in green which is the common one to describe the self-discharge in supercapacitors.…”

Fabrication of High‐performance Supercapacitors Using Hierarchical MnO2 Nanostructures on a Frosted Glass Surface

“…For the ohmic leakage, the voltage ( V ) decays exponentially with time, however, the plot of ln( V ) versus time does not follow a straight line (see Figure S7a, Supporting Information), thus the ohmic leakage contribution can be neglected in the present device. The contribution due to diffusion varies with the square root of time and activation, CR‐controlled mechanism varies with the logarithm of time, [ 52–54 ] and the presence of these mechanisms in our device can be verified by the nearly linear variations shown in Figure S7b,c, Supporting Information. Accordingly, the relation between voltage and time can be expressed as where V(t) is the open‐circuit voltage at time t , and A , P , and Q are the quantities occurring due to the various Faradaic processes, and B is the diffusion parameter.…”

Toward a New Generation of Fire‐Safe Energy Storage Devices: Recent Progress on Fire‐Retardant Materials and Strategies for Energy Storage Devices

“…Some of the ILs that have been employed in energy storage devices include: 1-ethyl-3-methylimidaz olium bis[(trifluoromethyl)sulfonyl] imide, [84] N-methyl, propyl pyrrolidinium bis(fluorosulfonyl) imide, [85] 1-butyl-3-methylimidazolium o,o-bis(2-ethylhexyl) dithiophosphate (BMIm-DDTP), [86] 1-ethyl-3-methylimidazolium bis(trifluoromethanesulphonyl)imide, [87] and 1-Ethyl-3-methylimidazolium acetate. [88] While ILs hold great promise in future energy storage devices, the current application in energy devices such as battery electrolytes is usually hindered by their high viscosity, resulting in poor ion transport and low ionic conductivity. Besides, another limiting factor of ILs is their relatively high cost compared with traditional electrolytes.…”