Biopolymer phytagel-derived porous nanocarbon as efficient electrode material for high-performance symmetric solid-state supercapacitors

Abstract

General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

Ionic Liquid-Based Electrolytes for Energy Storage Devices: A Brief Review on Their Limits and Applications

“…Pandey et al [5] synthesized GPEs using the hydrophobic IL of (1-ethyl-3-methylimidazolium tris(pentafluoroethyl) trifluorophosphate) (Im13FAP) incorporated in PVdF-co-HFP, and they showed the broad electrochemical window of 4.4 V using MWCNT electrodes with the 2×10 −3 S cm −1 electronic conductivity at 298 K, 76 F g −1 specific capacitance at 1.0 mA cm −2 , 17.2 W h kg −1 energy Figure 9. CV curves of pure EMImTFSI (a,b) and EMImTFSI/acrylonitrile (AN) (c,d) using sawdust carbon symmetrical electrodes at room temperature; CV curves (e) different potential window and (f) different scan rate 10-500 mV s −1 , (g) capacitance variations with potential window, (h) Arrhenius plot of specific capacitance (Inset: temperature dependent CV curve) for f -graphene in BMImBF 4 electrolyte and gel electrolytes [198,234].…”

“…Pandey et al [5] synthesized GPEs using the hydrophobic IL of (1-ethyl-3-methylimidazolium tris(pentafluoroethyl) trifluorophosphate) (Im 13 FAP) incorporated in PVdF-co-HFP, and they showed the broad electrochemical window of 4.4 V using MWCNT electrodes with the 2 × 10 −3 S cm −1 electronic conductivity at 298 K, 76 F g −1 specific capacitance at 1.0 mA cm −2 , 17.2 W h kg −1 energy density, and 18.9 kW kg −1 power density. The highest ionic conductivity of 7.31 mS cm −1 was attained at 393 K by Liew et al [237] due to incorporation of 50 wt% of PVA/CH 3 COONH 4 /Im 14 Cl-based polymer electrolytes with considerable SC parameters (specific capacitance-31.28 F g −1 ; energy density-2.39 Wh kg −1 ; power density-19.79 W kg −1 ).…”

“…Recently, flexible SCs were constructed using CNTs and IL-based GPEs, and their capacitance value was 135 F g −1 at 2 A g −1 [204]. Pandey et al [5] studied IL Im 13 FAP-incorporated GPEs and MWCNT electrodes for SC applications.…”

“…In the recent times, most of the transportable smart devices and some of the hybrid electric vehicles, which are marketed to present day customers, are equipped with the light weight electrochemical energy storage (EES) devices, include lithium-ion batteries [1][2][3][4] (LIBs) and supercapacitors [5][6][7][8] (SCs), which is the backbone of commercially available portable electronic devices [9,10]. However, to date, uses of LIBs and SCs as a power sources for large scale applications, including electric vehicles, are a distant reality.…”

Recent Advances in Nanostructured Transition Metal Carbide- and Nitride-Based Cathode Electrocatalysts for Li–O2 Batteries (LOBs): A Brief Review

“…The environmental pollution and climate change caused by the use of fossil fuels have been major causes of concern worldwide. To restrict the consumption of fossil fuels, alternative renewable energy storage devices with an enhanced energy density and power densities, including lithium-ion batteries (LIBs) [1][2][3][4], lithium-air (Li-O 2 ) batteries (LOBs) [5,6], and supercapacitors (SCs) [2,7,8], have been developed for use in applications such as hybrid electric vehicles, off-grid electricity, and miniaturized electronic devices. LIBs and LOBs are also widely employed in high-energy devices due to their longer self-discharging time and excellent specific capacity.…”