Enhanced Copolymer Gel Modified by Dual Surfactants for Flexible Zinc–Air Batteries

Zhang, Pengfei; Wang, Keliang; Zuo, Yayu; Wei, Manhui; Wang, Hengwei; Chen, Zhuo; Shang, Nuo; Pei, Pucheng

doi:10.1021/acsami.2c13625

Cited by 24 publications

(12 citation statements)

References 52 publications

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“…The modified gel has stronger water retention, and the assembled FZABs show an ultra-long cycle life of 160 h at a current density of 2 mA cm −2 . Zhang et al [11] introduced Pluronic F127 and layered graphene oxide into polyacrylamide (PAM) to make a doubly modified enhanced gel polymer (PAM-F/G) with an ionic conductivity of 276 mS cm −1 . The flexible Zn-air battery assembled from the PAM-F/G electrolyte outputted a high power density of ≈155 mW cm −2 and could operate reliably at −20 °C for over 40 h. However, flexible Zn-air batteries still face the problems of low power and relatively short lifetime.…”

Section: Introductionmentioning

confidence: 99%

Quasi‐Liquid Gel Electrolyte for Enhanced Flexible Zn–Air Batteries

Shang

Wang

Wei

et al. 2023

Adv Funct Materials

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Flexible Zn–air batteries (FZABs) have attracted more attention due to their high specific energy, excellent stability, and unique rechargeability. However, these batteries are limited by the low conductivity of the gel electrolytes used. Here a quasi‐liquid gel with ionic conductivity comparable to liquid electrolytes is presented. The gel pore structure is guided and modified in situ with large‐size silica to achieve clear and unbroken pores. The reduced skeleton structure leads to a significant increase in ionic conductivity to 562.6 mS cm−1, enabling a peak power density of 154 mW cm−2 and a cycle life of over 40 h with a low charge–discharge gap. The FZABs also exhibit a high lifetime and potential advantages in 10 mA cm−2 charge/discharge testing, and demonstrate excellent performance in practical applications. This study offers new possibilities for developing high‐performance quasi‐liquid gels and innovative concepts for FZABs.

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Section: Introductionmentioning

confidence: 99%

Quasi‐Liquid Gel Electrolyte for Enhanced Flexible Zn–Air Batteries

Shang

Wang

Wei

et al. 2023

Adv Funct Materials

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“…The increased absorption rate and weight can be ascribed to the superhydrophilicity of PANa polymer chains and HAcc@HPPAN-COONa, the interconnected porous network, as well as the hollow nanofibers, which collectively favor the compatibility between HAcc@HPPAN-COONa/PANa with the electrolyte. The electrolyte and water retention ability were also tested, considering that outstanding electrolyte retention helps maintain high OH – conductivity over time and improve the cycling stability of FZABs. ,− As shown in Figures g, S6b, the PVA exhibits fast electrolyte and water loss (47.47 and 52.63%) in exposed air (temperature of 25 °C and humidity of 30%). However, the electrolyte and water desorption of HAcc@HPPAN-COONa/PANa and HPPAN-COONa/PANa show lower values of 11.51%/15.37% and 12.35%/17.57%, respectively, after 12 h.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Semi-interpenetrating Network Quasi-solid Electrolytes Modified by Hollow Porous Nanofibers for Flexible Zinc–Air Batteries

Chen

Jin

Yang

et al. 2023

ACS Sustainable Chem. Eng.

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The low ionic conductivity and poor mechanical property of quasi-solid electrolytes (QSEs) have hindered the practical implementation of flexible zinc−air batteries (FZABs) with a higher energy density and a longer working time. Herein, inspired by the robust natural extracellular matrix and good waterretention vacuoles of plant cells, semi-interpenetrating networkstructured QSEs composed of rigid quaternary ammonium salt of chitosan-decorated hollow porous polyacrylonitrile-based nanofibers and a soft hydrophilic sodium acrylate (PANa) polymer are fabricated. The cross-linked semi-interpenetrating network structure endows the QSEs with enhanced electrolyte absorption/ retention capacity, increased ionic conductivity, and improved mechanical strength. Moreover, the introduction of interconnected hollow porous nanofibers offers favorable water reservoirs and ion-conduction channels to further regulate the OH − flux. As a result, the FZABs assembled with the bioinspired QSEs exhibit a high power density (126 mW cm −2 ), a long lifespan (100 h), as well as good flexibility. The demonstrated bionic and in situ crosslinking strategies provide enlightening pathways for the design of advanced QSEs for high-performance flexible energy conversion and storage systems.

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“…[ 64 ] To improve the reversibility for the anode materials and water retention rate for the electrolyte itself, polymer gel materials have been introduced in alkaline gel hybrid electrolytes, which also gives rise to quasi‐solid‐state and flexible Zn–air batteries with improved cycle stability. [ 59a,65 ] Typically, polyvinyl alcohol (PVA) is used in the organic‐based electrolyte in the Zn–air battery; [ 66 ] and then, polyacrylic acid [ 67 ] (PAA), polyacrylamide [ 68 ] (PAM), and sodium polyacrylate [ 59a ] (PANa) are investigated in field of water‐retention capability, as well. A kind of alkali hydrogel electrolyte composed of cellulose cross‐linked PANa hydrogel and MBAA anchor was synthesized and studied.…”

Section: Strategies On Improving Electrochemical Performance For the ...mentioning

confidence: 99%

Post Nitrogen Electrocatalysis Era From Li–N₂Batteries to Zn–N₂Batteries

Meng

Xiong

et al. 2023

Advanced Energy Materials

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ability to deliver high energy density with good environmental friendliness, which are considered as the promising devices for energy storage and conversion in the sustainable human society. [1] Considering the abundance of nitrogen resource in the air, scientists began to shift their research perspective from O 2 or CO 2 to N 2 . With the first presentation of the concept for the Li-N 2 battery in 2017, [2] a new device combining energy conversion and N 2 fixation starts to come into sight. Inspired by this new model, from organic Na/Al-N 2 batteries [3] to aqueous Al/Zn-N 2 batteries, [4] other types of metal-N 2 batteries began to be reported as illustrated in Figure 1. For realizing electrochemical NH 3 production, the reaction path is nitrogen reduction reaction (NRR) during the discharge process for both organic and aqueous metal-N 2 batteries. Based on diverse reaction mechanism under aqueous and organic solution, the subsequent reaction in the charge process for two types of metal-N 2 batteries is different, that is, the nitrogen extraction reaction (NER) for the organic ones and oxygen evolution reaction (OER) for the aqueous ones. Overall, the developments of aqueous metal-N 2 batteries are mainly inspired by the organic metal-N 2 batteries and lag behind their development. Up to now, only part of the reported metal-N 2 batteries shows good electrochemical reversibility, [5] while some are electrochemical irreversible primary batteries that can only be discharged. [6] Unlike organic metal-N 2 batteries, for all the reversible/irreversible aqueous metal-N 2 batteries, NH 3 would be generated during the discharging process. In the meantime, these reversible aqueous metal-N 2 batteries can still be recharged even after the NH 3 releasing. [7] NH 3 plays an important role in maintaining the survival of human beings and the sustainable development for the social economy. First, NH 3 is an important chemical raw material for the production of agricultural nitrogen fertilizer, as well as a key energy storage intermediate and carbon-free energy carrier for the production of fuels, dyes, and other industries articles. [8] Moreover, NH 3 is considered as an excellent hydrogen energy carrier because of its high hydrogen content without carbon element and easy liquefaction for storing and transporting. [9] However, the industrial NH 3 synthesis is still carried out via the Haber-Bosch process developed 100 years ago based on the reaction of N 2 +3H 2 →NH 3 , which proceeds under high working pressure of 20 MPa and heat temperature of 673 K, resulting in Metal-N 2 batteries attract considerable research attention due to the dualfunctional characteristics applied in energy storage and conversion, as well as electrochemical artificial NH 3 yield. Nonetheless, it has been found that not all kinds of metal-N 2 batteries are suitable for combining the above two applications. Herein, recent advances in metal-N 2 batteries are summarized. First, the electrochemical reaction mechanisms for all types of metal-N 2 batteries,...

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Enhanced Copolymer Gel Modified by Dual Surfactants for Flexible Zinc–Air Batteries

Cited by 24 publications

References 52 publications

Quasi‐Liquid Gel Electrolyte for Enhanced Flexible Zn–Air Batteries

Quasi‐Liquid Gel Electrolyte for Enhanced Flexible Zn–Air Batteries

Enhanced Semi-interpenetrating Network Quasi-solid Electrolytes Modified by Hollow Porous Nanofibers for Flexible Zinc–Air Batteries

Post Nitrogen Electrocatalysis Era From Li–N₂Batteries to Zn–N₂Batteries

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Enhanced Copolymer Gel Modified by Dual Surfactants for Flexible Zinc–Air Batteries

Cited by 24 publications

References 52 publications

Quasi‐Liquid Gel Electrolyte for Enhanced Flexible Zn–Air Batteries

Quasi‐Liquid Gel Electrolyte for Enhanced Flexible Zn–Air Batteries

Enhanced Semi-interpenetrating Network Quasi-solid Electrolytes Modified by Hollow Porous Nanofibers for Flexible Zinc–Air Batteries

Post Nitrogen Electrocatalysis Era From Li–N2Batteries to Zn–N2Batteries

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Post Nitrogen Electrocatalysis Era From Li–N₂Batteries to Zn–N₂Batteries