Photo-enhanced Zn–air batteries with simultaneous highly efficientin situH2O2generation for wastewater treatment

Wang, Kun; Mo, Zhuohua; Tang, Songtao; Li, Mingyang; Yang, Hao; Long, Bei; Wang, Yi; Song, Shuqin

doi:10.1039/c9ta04253a

Cited by 41 publications

(24 citation statements)

References 40 publications

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“…Inspired by this work, Tong's group also utilized pTTh/CP as the photocathode for primary Zn‐air battery, whose photo‐responsive mechanism was similar to H 2 ‐O 2 battery. The battery exhibited much higher P peak (253.5 μW cm −2 ) via absorbing solar energy, than the counterpart under dark condition (60.5 μW cm −2 ).…”

Section: Photo‐responsive Batteries With Dual‐solid Active Materialsmentioning

confidence: 99%

Integrated Photo‐Responsive Batteries for Solar Energy Harnessing: Recent Advances, Challenges, and Opportunities

Fang

2020

ChemPlusChem

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responsive batteries that enable the effective combination of solar harvesting and energy conversion/storage functionalities render a potential solution to achieve the large-scale utilization of unlimited and cost-effective solar energy and alleviate the limits of conventional energy storage devices. The internal integration of photo-responsive electrodes into rechargeable batteries with the simplest two-electrode configuration is regarded as a reliable and appealing strategy for highly-efficient and low-cost utilization of solar energy by simplifying the device architecture and improving the energy efficiency. This progress report provides a brief review on photo-responsive batteries with integrated two-electrode configuration that can achieve solar energy conversion/storage in one single device. The basic device architecture, operating principles and practical performance of various photo-responsive systems based on solar energy harvesting in various batteries including Li ion batteries, LiÀ S batteries, LiÀ I batteries, dual-liquid redox batteries, LiÀ O 2 batteries, non-Li anode-O 2 /air batteries are summarized and discussed. Finally, the future opportunities and challenges regarding the two-electrode photo-responsive batteries are proposed.[a] Dr.

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Section: Photo‐responsive Batteries With Dual‐solid Active Materialsmentioning

confidence: 99%

Integrated Photo‐Responsive Batteries for Solar Energy Harnessing: Recent Advances, Challenges, and Opportunities

Fang

2020

ChemPlusChem

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“…When dissimilar materials with different geometrical and energy band structure are contacted, interface region is demonstrated to exhibit fundamentally different physicochemical characteristics from that of its bulk counterparts. [ 33 ] This so‐called “interfacial effects” play a central role in improving the performance of OER, ORR, as well as the ZAB. In this section, we make classified discussion on these interfacial effects according to the different mechanisms.…”

Section: Effects For Interface Engineeringmentioning

confidence: 99%

“…The solar energy, an inexhaustible energy source that is widely used, has enabled a novel application in ZABs known as photoenhanced ZAB, which can be considered as the combining of photochemical and electrochemical ( Figure 3 a). [ 33,59 ] When the photoelectrode is irradiated by light, electrons are excited to a high energy state from valence band (VB) to conduction band (CB), generating electron–hole pairs. [ 60 ] Within ZAB, O 2 can be trapped by photoexcited electrons and be reduced to O 2− radicals, while OH – can be trapped by photoinduced holes, facilitating the formation of hydroxyl radical species (Figure 3c).…”

Section: Effects For Interface Engineeringmentioning

confidence: 99%

“…The mismatch in Fermi levels can lead to charge redistribution at the interface and the created built-in electric field is essential for charge separation. [24,33] As for the geometric structure, the dislocation of lattice constants can arouse compressive or tensile strain, which can shift the position of d-band center [34] and trigger the formation of defects. [35] Besides, the difference in electronic affinity can initiate the charge transfer through the interfacial chemical bonding.…”

Section: Interface Engineering Of Air Electrocatalystsmentioning

confidence: 99%

“…The solar energy, an inexhaustible energy source that is widely used, has enabled a novel application in ZABs known as photoenhanced ZAB, which can be considered as the combining of photochemical and electrochemical (Figure 3a). [33,59] When the photoelectrode is irradiated by light, electrons are excited to a high energy state from valence band (VB) to conduction Reproduced with permission. [24] Copyright 2018, American Chemical Society.…”

Section: Charge Separationmentioning

confidence: 99%

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Interface Engineering of Air Electrocatalysts for Rechargeable Zinc–Air Batteries

Luo

Sun

et al. 2020

Advanced Energy Materials

175

124

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In the face of high costs and the insufficient energy density of current lithiumion batteries, aqueous rechargeable zinc (Zn)-air batteries with the advantages of low cost, environmental benignity, safety, and high energy density have been growing in importance in recent years. The practical application of Zn-air batteries, however, is severely restricted by the high overpotential, which is associated with the inherent sluggish kinetics of the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR) of air electrocatalysts. Recently, engineering heterostructured/hybrid electrocatalysts with modulated interface chemistry have been demonstrated as an effective strategy to improve the catalytic performance. Significant electronic effects, geometric effects, coordination effects, synergistic effects, and confinement effects occur at the heterostructure interface, which intensely affect electrocatalysts' performance in terms of intrinsic activity, active site density, and durability. In this review, the recent progress in the development of heterostructured air electrocatalysts by interface engineering is summarized. Particularly, the potential relationship between interface chemistry and oxygen electrocatalysis kinetics is bridged and outlined. This review provides a comprehensive and in-depth outline of the crucial role of the well-defined interfaces towards fast oxygen electrocatalysis, and offers a solid scientific basis for the rational design of efficient heterostructured air electrocatalysts and beyond.

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On‐Site Production of Dilute H₂O₂ with Zinc–Air Battery

Huang

et al. 2021

Adv Materials Technologies

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Hydrogen peroxide (H2O2) is extensively applied in environmental remediation, disinfection, bleaching, and so on. Two‐electron oxygen reduction reaction for synthesizing H2O2 is the most promising alternative to the traditional energy‐intensive anthraquinone process. Existing strategies for electrocatalytic synthesis of H2O2 generally proceed well in alkaline electrolytes. But environmental application demands the reaction to take place in a broad pH range, especially in acidic medium. Here a zinc‐air battery technology is developed for on‐site production of H2O2 in alkaline, neutral, and acidic conditions. A key component of the battery is the tubular cathode fabricated by partially oxidized carbon nanotubes self‐assembled on the substrate of nickel foam. The battery exhibits an unusual 2e− discharge property and achieves an appreciable H2O2 accumulation (215.1 µmol, 497 ppm, 162.5 mg L−1 h−1) in acidic solution within 3 h, which is among the highest value ever been reported through electrosynthesis. Excitingly, the battery coupled with UV light demonstrates a promising application in water purification, which enables rapid degradation of model pollutants and actual pollutants ranging from municipal sewage to dye and pesticide wastewaters. Furthermore, this water treatment technology can be self‐powered, as the battery in the system generates the power that is available to drive UV lights.

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Photo-enhanced Zn–air batteries with simultaneous highly efficientin situH₂O₂generation for wastewater treatment

Abstract: A photo-enhanced Zn–air battery with simultaneous highly efficient in situ H2O2 generation for wastewater treatment was constructed.

Cited by 41 publications

References 40 publications

Integrated Photo‐Responsive Batteries for Solar Energy Harnessing: Recent Advances, Challenges, and Opportunities

Integrated Photo‐Responsive Batteries for Solar Energy Harnessing: Recent Advances, Challenges, and Opportunities

Interface Engineering of Air Electrocatalysts for Rechargeable Zinc–Air Batteries

On‐Site Production of Dilute H₂O₂ with Zinc–Air Battery

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Photo-enhanced Zn–air batteries with simultaneous highly efficientin situH2O2generation for wastewater treatment

Abstract: A photo-enhanced Zn–air battery with simultaneous highly efficient in situ H2O2 generation for wastewater treatment was constructed.

Cited by 41 publications

References 40 publications

Integrated Photo‐Responsive Batteries for Solar Energy Harnessing: Recent Advances, Challenges, and Opportunities

Integrated Photo‐Responsive Batteries for Solar Energy Harnessing: Recent Advances, Challenges, and Opportunities

Interface Engineering of Air Electrocatalysts for Rechargeable Zinc–Air Batteries

On‐Site Production of Dilute H2O2 with Zinc–Air Battery

Contact Info

Product

Resources

About

Photo-enhanced Zn–air batteries with simultaneous highly efficientin situH₂O₂generation for wastewater treatment

On‐Site Production of Dilute H₂O₂ with Zinc–Air Battery