The RZABs assembled by FeNi@NHCFs as integrated air cathodes exhibit outstanding battery performance with high open-circuit voltage, large discharge specific capacity and power density, durable cyclic stability …
Although some FeNi alloys were removed by acid washing, the OER performance of the FeNi/HNC maintains very well. This new material affords a current density of 10 mA cm −2 at 1.48 V with an exceptional overpotential ( η10) of 250 mV.
Using this new catalyst as an air electrode, the as-prepared rechargeable Zn–air battery shows a high current density of 215 mA cm −2 at a voltage of 1.0 V, large peak power density (310 mW cm −2 ), high potential efficiency (64.7% at 10 mA cm −2) and prolonged operation durability.
Plainly, the voltage gap of the FeNi@NCSs based battery is about 1.01 V at 50 mA cm −2, which is far below as compared to that of Pt/C + RuO 2 (1.23 V at 50 mA cm −2 ).
This result was further confirmed by the HR-TEM measurements. As shown in Fig. 1d, an obvious lattice fringe with a d -spacing of 2.06 Å, consistent with the (111) plane of the FeNi alloy, was observed. Energy dispersive X-ray spectroscopy (EDS) confirms the presence of Fe, Ni, C and N within the material ( FeNi/GS ).
FeNi/HNC was then studied as the air cathode material to evaluate the battery performance (Fig. S12, † detailed information can be found in the ESI † ). 6 M KOH solution was employed as the electrolyte, and an open circuit voltage of ca. 1.43 V ( Fig. 4a) was obtained for the home-made zinc–air battery.
The ECSA is therefore calculated to be 71.1 m 2 g −1, when a specific capacitance value Cs = 0.060 mF cm −2 is adopted. 44 The high ECSA value of FeNi/HNC further confirms its favorable reaction kinetics since previous studies have demonstrated that large ECSAs could facilitate the transport of the electrolyte into catalytically active surfaces. 45
The RZABs assembled by FeNi@NHCFs as integrated air cathodes exhibit outstanding battery performance with high open-circuit voltage, large discharge specific capacity and power density, durable cyclic stability …
You can use Peukert''s law to determine the discharge rate of a battery. Peukert''s Law is (t=Hbigg(frac{C}{IH}bigg)^k) in which H is the rated discharge time in hours, C is the rated capacity of the discharge rate in amp …
In this work, we studied the FeNi-LDH intercalation for suppressing the self-discharge of the VB 2 –air battery. We adopt the vertical FeNi-LDH arrays to modify VB 2 particles. Hydroxyl ions participating in the discharge reaction are …
(a) Schematic diagram of zinc-air battery. (b) OCP plot of FeNi@NC and Pt/C-RuO 2. (c) Charge and discharge polarization (V-j) curves. (d) The corresponding power density curves. (e) Specific capacities plots at 10 mA cm −2. (f) Discharge curves at various discharge current densities of FeNi@NC and Pt/C-RuO 2.
When the discharge current density is 2, 5, 10 and 20 mA/cm 2, the discharge voltages of FePc@NiFe-WNC based battery are 1.32, 1.30, 1.27 and 1.24 V, respectively, which are …
Request PDF | FeNi-LDH Intercalation for Suppressing the Self-Discharge of VB2-Air Battery | The VB2-air battery is currently known for the highest theoretical specific capacity, up to 4060 mAh g-1.
This is known as the "hour" rate, for example 100Ahrs at 10 hours. If not specified, manufacturers commonly rate batteries at the 20-hour discharge rate or 0.05C. 0.05C is the so-called C-rate, used to measure charge and discharge current. A discharge of 1C draws a current equal to the rated capacity. For example, a battery rated at 1000mAh ...
A solid-state Al-air battery based on the FeNi-NP/NC demonstrates an ultra-long discharge time and a high specific capacity. This design opens a promising path for the efficient and stable Al-air battery.
When the discharge current density is 2, 5, 10 and 20 mA/cm 2, the discharge voltages of FePc@NiFe-WNC based battery are 1.32, 1.30, 1.27 and 1.24 V, respectively, which are significantly higher than those of Pt/C + RuO 2 based battery. It reflects the better discharge rate performance and good high current performance of FePc@NiFe-WNC based ...
A zinc–air battery using FeNi@NHCS as the air electrode achieves an open-circuit voltage of 1.432 V and a maximum power density of 181.8 mW cm −2. After 300 h of …
Fe7Ni3 nanospheres exhibited relatively high catalytic activities in the electrochemical tests. They delivered a reversible capacity of more than 7000 mAh/gKB and gave a discharge-charge voltage...
A zinc–air battery using FeNi@NHCS as the air electrode achieves an open-circuit voltage of 1.432 V and a maximum power density of 181.8 mW cm −2. After 300 h of galvanostatic charge–discharge cycles, the charge–discharge voltage gap (Δ U) of the battery had only decayed by 2.7%, demonstrating superior cycling stability.
The maximum discharge current for a Lithium Iron Phosphate (LiFePO4) battery typically ranges from 1C to 3C, depending on the specific design and manufacturer specifications.This means that a 100Ah battery can safely deliver between 100A to 300A of current without damage, making it suitable for high-drain applications.
A zinc–air battery using FeNi@NHCS as the air electrode achieves an open-circuit voltage ... The recurrent galvanostatic pulse method was employed to obtain the Galvanostatic charge–discharge curves of the battery, …
After 300 h of galvanostatic charge–discharge cycles, the charge–discharge voltage gap (Δ U) of the battery had only decayed by 2.7%, demonstrating superior cycling …
A solid-state Al-air battery based on the FeNi-NP/NC demonstrates an ultra-long discharge time and a high specific capacity. This design opens a promising path for the efficient and stable Al-air battery.
This fascinating phenomenon reveals the excellent rate capability of the FeNi@NCSs based Zn–air battery. As presented in Fig. 6 E, the FeNi@NCSs based battery …
The discharge current remains relatively stable during this period. 2. Voltage Sag Effect. As the battery continues to discharge, a phenomenon known as voltage sag may occur. Voltage sag refers to a temporary drop in the battery''s voltage under high current demands. This effect is caused by the internal resistance of the battery and can ...
In this work, we studied the FeNi-LDH intercalation for suppressing the self-discharge of the VB 2 –air battery. We adopt the vertical FeNi-LDH arrays to modify VB 2 particles. Hydroxyl ions participating in the discharge reaction are transported along adsorbed water molecules and hydroxide host layers through a rapid hydrogen bond formation ...
The RZABs assembled by FeNi@NHCFs as integrated air cathodes exhibit outstanding battery performance with high open-circuit voltage, large discharge specific capacity and power density, durable cyclic stability and great flexibility. Thus, this work brings a useful strategy to fabricate the integrated electrodes without using any ...
As depicted in Fig. 5 a, the battery employing P-FeNi/NC-900 exhibits a higher open-circuit voltage of 1.45 V compared to Pt/C + RuO 2 ... The rate performance of the ZABs assembled with P-FeNi/NC-900 and Pt/C + RuO 2 was evaluated with discharge current densities ranging from 2, 4, 6, 8 to 10 mA cm −2 (Fig. 5 d). In comparison to the Pt/C + RuO 2-based …
Using this new catalyst as an air electrode, the as-prepared rechargeable Zn–air battery shows a high current density of 215 mA cm −2 at a voltage of 1.0 V, large peak power density (310 mW cm −2), high potential efficiency (64.7% at 10 …
By means of Zn mass loss during constant current discharge curves, the specific capacities and energy densities are demonstrated. Compared to Pt/C + Ir/C (specific capacity: 706.9 mAh g ‒1, energy density: 830.6 mWh g ‒1) and rGO-FePc||FeNi (specific capacity: 710.8 mAh g ‒1, energy density: 845.8 mWh g ‒1), NF@GF/rGO-FePc||FeNi has larger specific …
This fascinating phenomenon reveals the excellent rate capability of the FeNi@NCSs based Zn–air battery. As presented in Fig. 6 E, the FeNi@NCSs based battery performs more ideal charging-discharging polarization curves than …
Fe7Ni3 nanospheres exhibited relatively high catalytic activities in the electrochemical tests. They delivered a reversible capacity of more than 7000 mAh/gKB and gave a discharge-charge voltage...
To examine the stability of the assembled rechargeable battery, it was cycled at a current density of 2.0 mA/cm 2 with each cycle lasting 20 minutes. As shown in Figure 6D, the initial discharge-charge voltage gap is …
After 300 h of galvanostatic charge–discharge cycles, the charge–discharge voltage gap (Δ U) of the battery had only decayed by 2.7%, demonstrating superior cycling stability. The Zn–air battery assembled by the bifunctional FeNi@HMCS electrocatalyst displayed a maximum power density of 181.8 mW cm −2 and superior stability for over 300 hours.
Using this new catalyst as an air electrode, the as-prepared rechargeable Zn–air battery shows a high current density of 215 mA cm −2 at a voltage of 1.0 V, large peak power density (310 mW cm −2), high potential efficiency (64.7% at 10 mA cm −2) and prolonged operation durability.
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