All‐Solid‐State, Foldable, and Rechargeable Zn‐Air Batteries Based on Manganese Oxide Grown on Graphene‐Coated Carbon Cloth Air Cathode

Sumboja, Afriyanti; Lübke, Mechthild; Wang, Yong; An, Tao; Zong, Yun; Liu, Zhaolin

doi:10.1002/aenm.201700927

Cited by 152 publications

(109 citation statements)

References 49 publications

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“…This will be in contrast to those processes completed at high hydrothermal temperatures [28,29,31,32] or chemical vapor deposition (CVD; they are usually higher than 600 °C), [33,34] which are tedious and time consuming. [29,[35][36][37] Herein, we describe a scalable fabrication process purposely developed for CuCo 2 S 4 nanosheets@nitrogen-doped carbon nanofibers (CuCo 2 S 4 NSs@N-CNFs) film with outstanding bifunctional electrocatalytic activity (E j = 10 (OER) -E 1/2 (ORR) = 0.751 V) and excellent mechanical flexibility, by effectively combining electrospinning with an in situ anion-exchange process at room temperature. Indeed, developing a low-temperature processing strategy would be a quantum step forward for realizing a high surface area, large population of active sites, and retaining of the mechanical flexibility.…”

Section: Introductionmentioning

confidence: 99%

CuCo₂S₄ Nanosheets@N‐Doped Carbon Nanofibers by Sulfurization at Room Temperature as Bifunctional Electrocatalysts in Flexible Quasi‐Solid‐State Zn–Air Batteries

et al. 2019

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The performance of quasi‐solid‐state flexible zinc–air batteries (ZABs) is critically dependent on the advancement of air electrodes with outstanding bifunctional electrocatalysis for both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), together with the desired mechanical flexibility and robustness. The currently available synthesis processes for high‐efficiency bifunctional bimetallic sulfide electrodes typically require high‐temperature hydrothermal or chemical vapor deposition, which is undesirable in terms of the complexity in experimental procedure and the damage of flexibility in the resultant electrode. Herein, a scalable fabrication process is reported by combining electrospinning with in situ sulfurization at room temperature to successfully obtain CuCo 2 S 4 nanosheets@N‐doped carbon nanofiber (CuCo 2 S 4 NSs@N‐CNFs) films, which show remarkable bifunctional catalytic performance ( E j = 10 (OER) – E 1/2 (ORR) = 0.751 V) with excellent mechanical flexibility. Furthermore, the CuCo 2 S 4 NSs@N‐CNFs cathode delivers a high open‐circuit potential of 1.46 V, an outstanding specific capacity of 896 mA h g −1 , when assembled into a quasi‐solid‐state flexible ZAB together with Zn NSs@carbon nanotubes (CNTs) film (electrodeposited Zn nanosheets on CNTs film) as the anode. The ZAB also shows a good flexibility and capacity stability with 93.62% capacity retention (bending 1000 cycles from 0° to 180°), making it an excellent power source for portable and wearable electronic devices.

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Section: Introductionmentioning

confidence: 99%

CuCo₂S₄ Nanosheets@N‐Doped Carbon Nanofibers by Sulfurization at Room Temperature as Bifunctional Electrocatalysts in Flexible Quasi‐Solid‐State Zn–Air Batteries

et al. 2019

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“…Besides, the AEZAB also shows dominant performance advantages over the most predominant ZABs reported previ-ously, [16,32,[56][57][58][59][60][61][62] further verifying a suitable asymmetric electrolyte in ZAB can bring forth remarkable improvement in performance of the ZAB. It should be pointed out that the electrolyte in both chamber did show remarkable impaction on the battery performance.…”

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confidence: 98%

An Asymmetric‐Electrolyte Zn−Air Battery with Ultrahigh Power Density and Energy Density

et al. 2017

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ZnÀair batteries have attracted enormous research interest, driven by the promise for vehicle propulsion owing to their advantages of high-level safety, low cost, and high specific energy density. Here, we report an asymmetric-electrolyte ZnÀair battery with acid catholyte and alkaline anolyte separated by a bipolar membrane. We demonstrate that the asdesigned ZnÀair battery, thanks to the as-formed concentration cell, can deliver a maximum power density of 380 mW cm À2 and a specific energy density of 1522 Wh kg À1 with an open-circuit voltage of 2.25 V. The as-proposed ZnÀair battery performance is superior to the conventional ZnÀair battery in terms of these pivotal performance parameters.Energy crisis and environmental pollutions caused by the consumption of fossil fuels have stimulated great interests in developing renewable energy sources. Accordingly, a series of energy storage and conversion systems, such as rechargeable batteries, [1][2][3][4][5] fuel cells, [6][7][8][9] and capacitors, [10][11][12][13][14] have been developed successfully to fulfill application demands in diverse fields. Among them, Zn-air batteries powered by oxidizing zinc with oxygen have received intensive attentions due to their advantages of high theoretic energy density and specific capacity, low cost, and high efficiency. [15][16][17] In addition, the current yearly global zinc production is sufficient to produce enough Zn-air batteries, [18][19][20] which holds overwhelming advantages over the current limited production of lithium that is necessary source for the current dominant lithium ion batteries (LIBs). [21][22][23] Zn-air batteries are thus regarded as promising energy sources for the next generation electric vehicle battery and as a utility-scale energy storage system. [17,[24][25][26] However, the cell voltage for Zn-air batteries is theoretically capable 1.65 V and almost all practical devices are optimized for less than 1.4 or 1.3 V, less than half of that in LIBs. Moreover, the outputting energy density in the Zn-air batteries reported so far was less than theoretical estimates. For example, the peak power density and energy density are always behind 200 mW cm À2 and 1000 Wh kg À1 , respectively. In these regards, it is highly desirable to make further improvements in output voltage and energy density of Zn-air batteries. [17,[27][28][29] We here report a newly asymmetric-electrolyte Zn-air battery (AEZAB) with H 2 SO 4 as catholyte and NaOH as anolyte that are separated by a bipolar membrane (BPM), in which the commercial Pt/C is applied as the cathode catalyst to demonstrate such proof-of-concept. We demonstrate the as-designed Zn-air battery is capable of releasing an open circuit voltage of 2.25 V with a power density of 380 mW cm À2 , 1.90 times higher than that of the conventional ZAB and even beat that of the best ZAB ever reported. Moreover, the energy density of the AEZAB is as high as 1522 Wh kg À1 , 1.51 times higher than that of conventional ZAB, even far surpassing the theoretic energy density of ZAB. F...

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“…Accordingly, gel electrolyte that is consisted of polymer gelata and corresponding aqueous electrolyte, has been explored and been widely employed in flexible Zn-based batteries, [46] thanks to their relatively good mechanical property originated from the frame and functional groups provided by polymer gelata. Therefore, conventional aqueous electrolyte could not meet the requirements of flexible Znbased batteries as its intrinsic character of good fluidity, which could not maintain a steady form and effectively segregate the electrodes to prevent short circuit.…”

Section: Flexible Electrolytementioning

confidence: 99%

Recent Advances in Flexible Zinc‐Based Rechargeable Batteries

Zhong

et al. 2018

Advanced Energy Materials

329

236

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date, there have been commercial efforts to manufacture lithium thin film batteries (<1 mm in thickness) being flexible and suitable for use in card-type and wearable devices. [3] However, these thin and flexible lithium-ion batteries have typically exhibited far less volumetric energy densities (<200 Wh L −1 ) than those of conventional lithium-ion batteries (<650 Wh L −1 ). [4] This performance roll-off is largely due to the fact that high barrier encapsulation of air and moisture sensitive lithium battery materials can severely impact the effective volumetric efficiency as the batteries are miniaturized. Therefore, high volumetric energy density lithium batteries with thickness <1 mm will be critical to enabling flexible electronics. [5] To this end, notable advancements have been made in the design of flexible lithium-sulfur and lithium-air batteries-those cathode chemistries enable high theoretical energy densities of 2800 and 6940 Wh L −1 , respectively-yet there remains substantial room for improvement. [6][7][8] The potential to yield high volumetric capacities by using less environmentally sensitive materials in the batteries sees zinc as an attractive anode alternative to lithium. In addition to the stability, zinc is likely to experience less cost pressure on raw material availability compared to lithium. In all cases, zinc secondary batteries represent a highly promising area of technology for Flexible Zn-based batteries are regarded as promising alternatives to flexible lithium-ion batteries for wearable electronics owing to the natural advantages of zinc, such as environmental friendliness and low cost. In the past few years, flexible Zn-based batteries have been studied intensively and exciting achievements have been obtained in this field. However, the development of flexible Zn-based batteries is still at an early stage. The challenges of developing flexible lithium-ion batteries are presented here. Then, a brief overview of recent progress in flexible zinc secondary batteries from the perspective of advanced materials and some issues that remain to be addressed are discussed.

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All‐Solid‐State, Foldable, and Rechargeable Zn‐Air Batteries Based on Manganese Oxide Grown on Graphene‐Coated Carbon Cloth Air Cathode

Cited by 152 publications

References 49 publications

CuCo₂S₄ Nanosheets@N‐Doped Carbon Nanofibers by Sulfurization at Room Temperature as Bifunctional Electrocatalysts in Flexible Quasi‐Solid‐State Zn–Air Batteries

CuCo₂S₄ Nanosheets@N‐Doped Carbon Nanofibers by Sulfurization at Room Temperature as Bifunctional Electrocatalysts in Flexible Quasi‐Solid‐State Zn–Air Batteries

An Asymmetric‐Electrolyte Zn−Air Battery with Ultrahigh Power Density and Energy Density

Recent Advances in Flexible Zinc‐Based Rechargeable Batteries

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All‐Solid‐State, Foldable, and Rechargeable Zn‐Air Batteries Based on Manganese Oxide Grown on Graphene‐Coated Carbon Cloth Air Cathode

Cited by 152 publications

References 49 publications

CuCo2S4 Nanosheets@N‐Doped Carbon Nanofibers by Sulfurization at Room Temperature as Bifunctional Electrocatalysts in Flexible Quasi‐Solid‐State Zn–Air Batteries

CuCo2S4 Nanosheets@N‐Doped Carbon Nanofibers by Sulfurization at Room Temperature as Bifunctional Electrocatalysts in Flexible Quasi‐Solid‐State Zn–Air Batteries

An Asymmetric‐Electrolyte Zn−Air Battery with Ultrahigh Power Density and Energy Density

Recent Advances in Flexible Zinc‐Based Rechargeable Batteries

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Product

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CuCo₂S₄ Nanosheets@N‐Doped Carbon Nanofibers by Sulfurization at Room Temperature as Bifunctional Electrocatalysts in Flexible Quasi‐Solid‐State Zn–Air Batteries

CuCo₂S₄ Nanosheets@N‐Doped Carbon Nanofibers by Sulfurization at Room Temperature as Bifunctional Electrocatalysts in Flexible Quasi‐Solid‐State Zn–Air Batteries