Symmetric supercapacitor devices based on pristine g-C3N4 mesoporous nanosheets with exceptional stability and wide operating voltage window

Negative electrodes for supercapacitors with good performance using conductive bismuth-catecholate metal–organic frameworks

“…In addition, the location of the redox peaks shows a minor change due to the rise in the internal diffusion resistance of the active materials. 38 According to Dunn's theory, 50 the diffusion-controlled process and surface-controlled process of charge storage are predicted by the following relationship between the peak current ( i , a ) and the sweep rate ( ν , mV s −1 ), i = aν b where i and ν are the peak current and the sweep rate, respectively. In general, a b -value of 0.5 indicates that charge storage is a semi-infinite diffusion process, while a b -value of 1.0 means a capacitive process for charge storage.…”

“…In addition, the specific capacitances of Bi(HHTP) 12 h and other electrodes are shown in Table 1. [38][39][40][41][42][43][44][45][46][47] Compared with the specific capacitance of the usual Bi-based electrode materials, the value of 234 F g −1 for Bi(HHTP) is not competitive. However, Bi(HHTP), as a newly emerging type of conductive MOF-based negative electrode material, does exhibit better electrochemical properties than other materials.…”

“…In addition, the location of the redox peaks shows a minor change due to the rise in the internal diffusion resistance of the active materials. 38 According to Dunn's theory, 50 the diffusion-controlled process and surface-controlled process of charge storage are predicted by the following relationship between the peak current (i, a) and the sweep rate (ν, mV s −1 ),…”

Binder-free Mn–V–Sn oxyhydroxide decorated with metallic Sn as an earth-abundant supercapattery electrode for intensified energy storage

“…As a result, developing supercapacitors with high energy density while maintaining their power density and cycling stability has become a critical challenge. [15][16][17] Transition metals are potential low-cost and environmentally friendly materials for energy storage and conversion technologies, due to their higher cycle stability compared to conductive polymers (CPs), which suffer from polymeric chain swelling and shrinking. [18][19][20] Additionally, transition metals are known for their higher specic capacitance compared to carbon-based materials.…”

Capacitive Behavior of Aqueous Electrical Double Layer Based on Dipole Dimer Water Model

“…Although aqueous electrolytes have disadvantages such as narrow electrochemical windows of 1.23 V due to the hydrogen/oxygen evolution reactions, they have benefits of high ionic conductivity, non-flammability, and low manufacture costs in comparison with their organic counterparts. In fact, the limitation of the narrow electrochemical window can be overcome in highly concentrated aqueous electrolytes, also known as water-in-salt (WiS) electrolytes [ 8 , 9 , 10 , 11 , 12 , 13 ], which have been shown to significantly widen the electrochemical stability window to over 3.0 V, via interface modification [ 14 , 15 ], or the development of chemically stable, high surface area carbon structures [ 16 , 17 , 18 ]. As a result, aqueous electrolytes are still popular in the study of EDLCs [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ].…”