Evaluation of aluminium doped lanthanum ferrite based electrodes for supercapacitor design

Enhancing Li-ion capacity and rate capability in cation-defective vanadium ferrite aerogels via aluminum substitution

“…10 To our knowledge, the effects of Al-substitution on the Li-insertion properties of ferrite spinels have yet to be explored, although Al-substituted lanthanum and copper-cobalt ferrites demonstrate increased specic capacitance in aqueous electrochemical capacitors. 15,16 In this report, we show that vanadium ferrite (VFe 2 Ox) aerogels synthesized by an epoxide-driven sol-gel method readily undergo Al-substitution with a targeted 10% exchange of Al for V. This simple synthetic variation yields aerogels (designated 10Al-VFe 2 Ox) that exhibit $40% higher specic surface area (aer thermal treatment at 300 C), but otherwise similar structural characteristics to unsubstituted VFe 2 Ox aerogels. Aluminium compositional substitution into VFe 2 Ox further enhances specic capacity (by >30%) and high-rate performance for nonaqueous Li-ion storage when these materials are incorporated in powder-composite electrodes and electrochemically evaluated in two-terminal Li half-cells.…”

Mesoporous ZnMoS4 as a supercapacitor electrode material with battery-like behavior

“…Such behavior indicates that the as-synthesized ZMS has an effective storage capacity with excellent rate capability. 28 In order to calculate the coulombic efficiency (Z%) of the charging/discharging process for ZMS, eqn (3) was applied using the charging and discharging times obtained from GCD measurements as follows: 24,29 Z%…”

Ternary mixed nickel cobalt iron oxide nanorods as a high-performance asymmetric supercapacitor electrode

“…57 EIS offers information about electrode internal resistant and electrode-electrolyte charge transfer resistance. 58 EIS spectra of NiCoFeO 4 nanorods is shown in Figure 4.a. Figure 4.a shows a depressed high-frequency semicircle and a low-frequency inclined straight line.…”