High‐Performance Aqueous Na–Zn Hybrid Ion Battery Boosted by “Water‐In‐Gel” Electrolyte

Pan, Wending; Wang, Yifei; Zhao, Xiaolong; Zhao, Yan; Liu, Xinhua; Xuan, Jin; Wang, Huizhi; Leung, Dennis Y.C.

doi:10.1002/adfm.202008783

Cited by 63 publications

(64 citation statements)

References 59 publications

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“…Interestingly, the voltage window can be broadened to 2.1 V benefiting from the synergistic effect of hydrogel and the concentrated salts on suppressing free water activity. [37] The electrochemical reaction kinetic of flexible ZHSC displayed in Figure S13 (Supporting Information) also revealed the dominant position of the surface-driven capacitive process. The specific capacitance was 194.5 F g −1 at 0.5 A g −1 and the capacitance retained 75.4% at 5 A g −1 , indicating excellent rate performance as shown in Figure 6c.…”

Section: Resultsmentioning

confidence: 95%

Flexible Quasi‐Solid‐State High‐Performance Aqueous Zinc Ion Hybrid Supercapacitor with Water‐in‐Salt Hydrogel Electrolyte and N/P‐Dual Doped Graphene Hydrogel Electrodes

Deng

Wang

Zhang

et al. 2021

Advanced Sustainable Systems

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Carbon-based supercapacitors can be charged and discharged in seconds with a high power density (up to 10 kW kg −1 ) and long cycling life via fast ion adsorption and desorption in Helmholtz double layer at the interface between electrodes and electrolyte. [5] However, their energy density (5-10 Wh kg −1 ) was no better than LIBs. [6] Consequently, the hybrid supercapacitor was assembled by combining the battery-type anode and the capacitor-type cathode to achieve the trade-off between energy density and power density. [7] And more and more research focused on hybrid capacitors, including Li + , [8] Na + , [9] K + , [10] Zn 2+ , [7a] and Al 3+[11] based hybrid supercapacitors. Nevertheless, the use of organic electrolytes will lead to high safety risks and environmental pollution. [12] To explore more environmentally friendly electrolytes, the water-based electrolyte has been paid many efforts, [13] where zinc-ions hybrid supercapacitors (ZHSCs) were especially attractive owing to zinc high specific capacity (5855 mAh cm −3 or 823 mAh g −1 ), the low redox potential of −0.76 V (vs standard hydrogen electrode). [14] Meanwhile, considering the high reactivation of metallic lithium, potassium, and sodium in the atmosphere and aqueous electrolyte, metallic Zn was more suitable for use as electrodes directly in a water-based system. [15] Besides, the construction of water-based devices can avoid high fabrication costs arose from the strict anhydrous and oxygen-free environment for organic electrolytes. Also, Zn and its compounds are abundant and inexpensive in nature. [16] For example, Dong et al. reported the aqueous ZHSC using ZnSO 4 as electrolyte and Zn foil as anode achieved an energy density of 84 Wh kg −1 with a power output of 14.9 kW kg −1 , which was superior to the power density of batteries and the energy density of supercapacitors. [7a] The aqueous ZHSCs inevitably suffer the decomposition of water when a wider voltage window was required ascribed to the competitive hydrogen evolution (<0.2 V vs Zn 2+ /Zn) and oxygen evolution (>1.8 V vs Zn 2+ /Zn) of water molecules. [2d] A wider voltage window can be beneficial to increasing the energy density according to the formula: E = 1/2 CV 2 (1). Fortunately, emerging "water-in-salt" electrolyte can effectively broaden the Aqueous zinc ion hybrid supercapacitors (ZHSCs) have attracted considerable attention owing to the bivalent nature, high abundance, and stability in the water-based system of zinc. High energy density and superb power output can be achieved simultaneously by integrating a battery-type electrode and a capacitive-type electrode. However, there are still many issues that remain, including but not only hydrogen evolution reaction, dendrite growth, and dramatic capacity loss at low temperatures. Herein, a new type of hybrid "water-in-salt" hydrogel electrolyte based on 1 m Zn(CH 3 COO) 2 and 20 m CH 3 COOK to expand the voltage window of ZHSCs to 0-2.1 V by suppressing the decomposition of water molecules is developed. The aqueous ZHSC deliver...

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Section: Resultsmentioning

confidence: 95%

Flexible Quasi‐Solid‐State High‐Performance Aqueous Zinc Ion Hybrid Supercapacitor with Water‐in‐Salt Hydrogel Electrolyte and N/P‐Dual Doped Graphene Hydrogel Electrodes

Deng

Wang

Zhang

et al. 2021

Advanced Sustainable Systems

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“…In view of this, it has been proposed to use the polar groups of sodium alginate hydrogels (water‐in‐gel) to capture water molecules and restrict their movement by hydrogen bonding (ESPW >2.7 V, Figure 6 b). [49] Also the carboxylate groups in the gel can provide special channels for ion transport to ensure sufficiently high ionic conductivity. Furthermore, ion‐exchange membrane engineering (decoupled electrolyte, ESPW >3.0 V) can decouple the cathodic and anodic electrolyte to inhibit OER and HER by high concentrations of H + and OH − , respectively (Figure 6 b).…”

Section: Design Strategies For High‐voltage Aqueous Zinc Batteriesmentioning

confidence: 99%

Design Strategies for High‐Energy‐Density Aqueous Zinc Batteries

et al. 2022

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In recent years, the increasing demand for high‐capacity and safe energy storage has focused attention on zinc batteries featuring high voltage, high capacity, or both. Despite extensive research progress, achieving high‐energy‐density zinc batteries remains challenging and requires the synergistic regulation of multiple factors including reaction mechanisms, electrodes, and electrolytes. In this Review, we comprehensively summarize the rational design strategies of high‐energy‐density zinc batteries and critically analyze the positive effects and potential issues of these strategies in optimizing the electrochemistry, cathode materials, electrolytes, and device architecture. Finally, the challenges and perspectives for the further development of high‐energy‐density zinc batteries are outlined to guide research towards new‐generation batteries for household appliances, low‐speed electric vehicles, and large‐scale energy storage systems.

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“…113 To avoid the aforementioned problems caused by Zn 2+ insertion/extraction, aqueous Zn hybrid batteries (AZHBs) have been developed using commercial cathode materials for traditional alkali metal ion batteries (LIBs, SIBs, PIBs). 132,133,186 During charge and discharge processes, alkali metal ions (Li + , Na + , K + , Al 3+ , and Mg 2+ ) in the electrolyte participate in the insertion/extraction process in the cathode materials rather than the Zn 2+ . Compared with the traditional aqueous alkali metal ion batteries, AZHBs feature a simplified rechargeable battery configuration, increased operating voltage, extended cycling life, and enhanced energy and power density.…”

Section: Alkali Metal Ions Involved Insertion/ Extractionmentioning

confidence: 99%

“…Importantly, recent progress has demonstrated that cathode materials in Zn‐based batteries exhibited quite different electrochemical behaviors in different electrolytes 113 . To avoid the aforementioned problems caused by Zn 2+ insertion/extraction, aqueous Zn hybrid batteries (AZHBs) have been developed using commercial cathode materials for traditional alkali metal ion batteries (LIBs, SIBs, PIBs) 132,133,186 . During charge and discharge processes, alkali metal ions (Li + , Na + , K + , Al 3+ , and Mg 2+ ) in the electrolyte participate in the insertion/extraction process in the cathode materials rather than the Zn 2+ .…”

Section: Different Reaction Mechanisms Based On the Cathodesmentioning

confidence: 99%

Aqueous Zn‐based rechargeable batteries: Recent progress and future perspectives

Gaixia

Yang

et al. 2021

InfoMat

108

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Benefiting from the advantageous features of high safety, abundant reserves, low cost, and high energy density, aqueous Zn‐based rechargeable batteries (AZBs) have received extensive attention as promising candidates for energy storage. To achieve high‐performance AZBs with high reversibility and energy density, great efforts have been devoted to overcoming their drawbacks by focusing on the modification of electrode materials and electrolytes. Based on different cathode materials and aqueous electrolytes, the development of aqueous AZBs with different redox mechanisms are discussed in this review, including insertion/extraction chemistries (e.g., Zn2+, alkali metal ion, H+, NH4+, and so forth) dissolution/deposition reactions (e.g., MnO2/Mn2+), redox couples in flow batteries (e.g., I3−/3I−, Br2/Br−, and so forth), oxygen electrochemistry (e.g., O2/OH−, O2/O22−), and carbon dioxide electrochemistry (e.g., CO2/CO, CO2/HCOOH). In particular, the basic reaction mechanisms, issues with the Zn electrode, aqueous electrolytes, and cathode materials as well as their design strategies are systematically reviewed. Finally, the remaining challenges faced by AZBs are summarized, and perspectives for further investigations are proposed.

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High‐Performance Aqueous Na–Zn Hybrid Ion Battery Boosted by “Water‐In‐Gel” Electrolyte

Cited by 63 publications

References 59 publications

Flexible Quasi‐Solid‐State High‐Performance Aqueous Zinc Ion Hybrid Supercapacitor with Water‐in‐Salt Hydrogel Electrolyte and N/P‐Dual Doped Graphene Hydrogel Electrodes

Flexible Quasi‐Solid‐State High‐Performance Aqueous Zinc Ion Hybrid Supercapacitor with Water‐in‐Salt Hydrogel Electrolyte and N/P‐Dual Doped Graphene Hydrogel Electrodes

Design Strategies for High‐Energy‐Density Aqueous Zinc Batteries

Aqueous Zn‐based rechargeable batteries: Recent progress and future perspectives

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