Metal–organic frameworks and their derivatives for metal-ion (Li, Na, K and Zn) hybrid capacitors

Abstract

Metal-ion hybrid capacitors (MIHCs) hold particular promise for next-generation energy storage technologies, which bridge the gap between high energy density of conventional batteries and high power density and long lifespan...

Iron-selenide-based titanium dioxide nanocomposites as a novel electrode material for asymmetric supercapacitors operating at 2.3 V

“…[3][4][5][6][7][8][9] The truncated energy density (∼20 Wh kg −1 ) of SCs severely obstructs its vast applications compared with that of Li-ion batteries (∼300 Wh kg −1 ). [10][11][12] Based on the following equation for calculating the energy density for SCs, E = 0.5C × V 2 , two factors need to be addressed to enhance the energy density; either the capacitance (C) or the working voltage (V). More specically, the working voltage is a procient way to boost the energy density further, as the voltage is proportional to the square of the energy density.…”

Exchanging Anion in CuCo─Carbonate Double Hydroxide for Faradaic Supercapacitors: A Case Study

“…The design and fabrication of electrode materials with superior redox properties and conducting nature can improvise the efficacy of SCs, over traditional physical adsorption–desorption-based carbonaceous electrode materials used in conventional electric double-layer capacitors (EDLCs) . In recent years, there have been numerous reports on the utilization of transition-metal derivatives as electrode materials in SCs with improved energy density, major functions depend on their redox nature and electron/ion transport capability, categorized as Faradaic capacitors (FCs) or pseudocapacitors (PCs). − In this case to tune the electrochemical and conductance characteristics, feasible electronic structures with impeccable morphological features and elemental compositions of electrode materials need to be optimized. − …”

Two birds with one stone: cobalt/silicon species encapsulated in MOF-derived nitrogen-doped carbon as an integrated electrode for next-generation symmetric pseudocapacitors with energy density over 100 W h kg−1

“…Supercapacitors (SCs) have emerged as viable candidates, owing to their remarkable cycling stability and outstanding power density for superior energy storage technologies. 1,2 Nevertheless, because of the SCs' poor energy density, their practical application has been challenging for a long time. Using the vast potential window as a foundation, an asymmetric design was developed to increase energy density.…”