This novel zinc–air battery is capable of delivering a peak power density of 102 mW cm −2, surpassing state-of-the-art paper-based power sources. The superior power density originates from the boosted electrochemically active surface area of the cathode, which enhances the oxygen reduction reaction kinetics.
... The power densities of batteries with zinc foil and zinc gel electrodes range from 10 to 180 mW cm −2 and 10 to 100 mW cm −2 , respectively. The power densities of batteries using different types of zinc pellets differ considerably from each other resulting largely from differences in collector design .
A zinc–air battery is a metal–air electrochemical cell powered by the oxidation of zinc with oxygen from the air. During discharge, a mass of zinc particles forms a porous anode, which is saturated with an electrolyte. Oxygen from the air reacts at the cathode and forms hydroxyl ions which migrate into the zinc paste and form zincate (Zn (OH)2−
As a result, the hybrid battery showed an energy density of 963 Wh kg −1 and good durability with an energy efficiency of ≈73% of 230 cycles at 5 mA cm −2. a) Schematic illustrations of Zn-Ni/air hybrid battery, b) CV curves, and c) GCD curves of hybrid battery based on Ni 3 S 2 @SNCNT working in the air-exposure conditions.
Here, we propose Zn–air batteries with a high potential (∼2.25 V) and high power density (∼318 mW/cm2) by using the newly designed iron azaphthalocyanine unimolecular layer (AZUL) electrocatalyst and a tandem Zn–air battery cell.
Zn-air batteries have attracted considerable attention from researchers owing to their high theoretical energy density and the abundance of zinc on Earth. The modification of battery component materials represent a common approach to improve battery performance. The effects of cell design on cell performance are seldom investigated.
Zinc–air battery
The foam has a surface area of ~1,663 m 2 /gr. Primary batteries demonstrated an open-circuit potential of 1.48 V, a specific capacity of 735 mAh/gr (Zn) (energy density of 835 Wh/kg (Zn)), a peak power density of 55 mW/cm 3 and stable operation for 240 h after mechanical recharging.
Learn More
Achieving High Energy Efficiency: Recent Advances in …
By optimizing the active material loading and surface hydrophobicity, a Zn-Co/air hybrid battery achieved an energy density of 936 Wh kg −1 (Figure 5m) and maintained the voltages in the range of 0.94–2.01 V for …
Learn More
A Rechargeable Zn–Air Battery with High Energy Efficiency …
1 Introduction. The rechargeable zinc–air battery (ZAB) has attracted significant interest as a lightweight, benign, safe, cheap aqueous battery, with a high theoretical energy density (1086 Wh kg Zn −1), four times higher than current lithium-ion batteries. [1-4]A major limitation of ZABs is their high charging overvoltage (that leads to charging potential > 2 V), …
Learn More
A high power flexible Zn-air battery via concurrent PAA …
This advancement improved the air electrode structure, facilitating better mass and charge transfer, and resulted in a peak power density of 389.1 mW cm −2. This study provides …
Learn More
High energy density picoliter-scale zinc-air microbatteries for
Using dissolved oxygen, picoliter Zn-air batteries working in a neutral aqueous solution provided an energy density of more than 760 Wh liter −1 (2.75 μJ pl-1) and an areal power density of 0.15 mW cm −2, with an open circuit voltage of 1.16 V. This represents the highest energy density for energy storage devices below 1 μl in volume. We ...
Learn More
Achieving High Energy Efficiency: Recent Advances in Zn‐Air…
By optimizing the active material loading and surface hydrophobicity, a Zn-Co/air hybrid battery achieved an energy density of 936 Wh kg −1 (Figure 5m) and maintained the voltages in the range of 0.94–2.01 V for 400 cycles.
Learn More
High-Power-Density and High-Energy-Efficiency Zinc-Air Flow Battery …
A novel zinc-air flow battery is first designed for long-duration energy storage. A max power density of 178 mW cm −2 is achieved by decoupling the electrolyte. Fast charging is realized by introducing KI in the electrolyte as a reaction modifier.
Learn More
Robust and flexible 3D integrated FeNi@NHCFs air electrode
Rechargeable zinc-air battery (RZAB) ... evidencing fast kinetics for ORR and OER on the FeNi@NHCFs integrated air cathode. The peak power density of RZAB driven by FeNi@NHCFs integrated air cathode is up to 150.1 mW·cm −2, significantly higher than Pt/C + Ru/C reference RZAB of 107.4 mW·cm −2 (Fig. 5b). The galvanostatic discharge curves (Fig. …
Learn More
A high power density paper-based zinc–air battery with a …
This novel zinc–air battery is capable of delivering a peak power density of 102 mW cm −2, surpassing state-of-the-art paper-based power sources. The superior power density originates from the boosted electrochemically active surface area of the cathode, which enhances the oxygen reduction reaction kinetics.
Learn More
Elucidating the mechanism of discharge performance improvement in zinc ...
Bockelmann et al. reported zinc-air flow batteries with a silver-containing electrode and a nickel foam for the ORR and OER, respectively [21], and a peak power density of 270 mW cm −2 and more than 600 cycles were achieved.
Learn More
Chemistry in rechargeable zinc-air battery: A mechanistic overview
The power density of the zinc–air battery can be graphically represented as a function of current density by multiplying the discharge voltage by the applied current density, thereby allowing the identification of the peak power density. 1.2.2. Galvanostatic cycling. Electrochemical long-term durability tests for rechargeable zinc air batteries are performed using galvanostatic charge ...
Learn More
A high power density paper-based zinc–air battery with …
This novel zinc–air battery is capable of delivering a peak power density of 102 mW cm −2, surpassing state-of-the-art paper-based power sources. The superior power density originates from the boosted …
Learn More
Modulated FeWO4 electronic structure via P doping on ...
For application in zinc–air batteries, the zinc–air batteries based on P–FeWO 4 /PNC demonstrated a specific capacity of 810.1 mAh·g –1, a high peak power density of 172.2 mW·cm –2, and an extended charge–discharge cycle stability lasting for 240 h.
Learn More
Yttrium Oxide Nanoclusters Boosted Fe-N
By comparing the peak power density from our FeY-NC based Zn-air battery with other recently reported catalysts in Figure 5g [62-72], it is found that a peak power density of 233 mW cm −2 from FeY-NC is the unprecedent value that have never been reached. The electrocatalytic performance of materials are evaluated in acidic state.
Learn More
Decoupled Cathode with Light Assistance for Rechargeable Zinc …
3 · Another crucial element affecting the overall energy density of zinc-air batteries is the slow kinetics observed at the cathode [21]. ... (XPS) further analyzed the chemical composition …
Learn More
Decoupled Cathode with Light Assistance for Rechargeable Zinc-Air ...
3 · Another crucial element affecting the overall energy density of zinc-air batteries is the slow kinetics observed at the cathode [21]. ... (XPS) further analyzed the chemical composition and valence states of pTTh, with the peak at 285.00 eV attributed to C=C in C 1s (Fig. S3a) [29]. S 2p shows two peaks at 165.00 and 163.70 eV, corresponding to S 2p 1/2 and S 2p 3/2, …
Learn More
Advanced zinc-air batteries based on high-performance hybrid ...
The resulting primary Zn-air battery showed high discharge peak power density ~265 mW cm −2, current density ~200 mA cm −2 at 1 V and energy density >700 Wh kg −1.
Learn More
Polarization and power density curves of the Zn–air …
With low zincate ions crossover and a peak power density of 66 mW cm−2, the prepared membrane is a suitable candidate for rechargeable Zn slurry–air flow batteries.
Learn More
Rechargeable zinc-air batteries
Use of the nanocomposite catalyst in the zinc-air battery leads to a small voltage gap of 0.77 V at 5 milliamperes per square centimeter, a high peak power density of 22 milliwatts per cubic centimeter and stability for over 950 hours. Azhar says, "The results from our work show that the Co-N-C and LDH catalysts work synergistically in catalyzing the oxygen-reduction and …
Learn More
Rare-metal-free Zn–air batteries with ultrahigh voltage and high power …
Here, we propose Zn–air batteries with a high potential (∼2.25 V) and high power density (∼318 mW/cm2) by using the newly designed iron azaphthalocyanine unimolecular layer (AZUL) electrocatalyst and a tandem Zn–air battery cell. The AZUL electrocatalyst in this new type of cell had a high electrochemical stability and high ...
Learn More
High energy density picoliter-scale zinc-air …
Using dissolved oxygen, picoliter Zn-air batteries working in a neutral aqueous solution provided an energy density of more than 760 Wh liter −1 (2.75 μJ pl-1) and an areal power density of 0.15 mW cm −2, with an open …
Learn More
A high power flexible Zn-air battery via concurrent PAA …
This advancement improved the air electrode structure, facilitating better mass and charge transfer, and resulted in a peak power density of 389.1 mW cm −2. This study provides valuable insights into the development of flexible zinc-air batteries, particularly for wearable electronic devices, and contributes to resolving key limitations in ...
Learn More
Polarization and power density curves of the Zn–air battery
With low zincate ions crossover and a peak power density of 66 mW cm−2, the prepared membrane is a suitable candidate for rechargeable Zn slurry–air flow batteries.
Learn More
Rare-metal-free Zn–air batteries with ultrahigh voltage …
Here, we propose Zn–air batteries with a high potential (∼2.25 V) and high power density (∼318 mW/cm2) by using the newly designed iron azaphthalocyanine unimolecular layer (AZUL) electrocatalyst and a tandem …
Learn More
MOF-mediated synthesis of novel PtFeCoNiMn high-entropy nano …
The assembled quasi-solid-state zinc-air battery using PtFeCoNiMn/NC as air electrode shows a high peak power density of 192.16 mW·cm−2, low charge–discharge voltage gap, and excellent durability over 500 cycles at 5 mA·cm−2. This work demonstrates an effective route for rational design of bifunctional nanostructured HEA ...
Learn More
High-Power-Density and High-Energy-Efficiency Zinc-Air Flow …
A novel zinc-air flow battery is first designed for long-duration energy storage. A max power density of 178 mW cm −2 is achieved by decoupling the electrolyte. Fast charging …
Learn More
