A safe and robust dual-network hydrogel electrolyte coupled with multi-heteroatom doped carbon nanosheets for flexible quasi-solid-state zinc ion hybrid supercapacitors

Wu, De Pei; Ji, Chenchen; Mi, Hongyu; Guo, Fengjiao; Cui, Haonan; Qiu, Pengtao; Yang, Nianjun

doi:10.1039/d1nr02826j

Cited by 35 publications

(13 citation statements)

References 89 publications

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“…It is worth mentioning that the DOD value (80.9%) of the Zn anode in PASHE is higher than that of recent reports with various strategies (Table S1, Supporting Information). The cumulative capacity of the Zn|PASHE|Zn cell at 20 mA cm −2 and 1 mAh cm −2 is superior to reported symmetrical cells with hydrogel electrolyte engineering (Figure 4i) [17,20,24,[53][54][55][56][57][58][59][60][61][62][63] and other strategies (Table S2, Supporting Information), respectively.…”

Section: Resultsmentioning

confidence: 79%

Kinetics‐Boosted Effect Enabled by Zwitterionic Hydrogel Electrolyte for Highly Reversible Zinc Anode in Zinc‐Ion Hybrid Micro‐Supercapacitors

Zhang

Guo

et al. 2022

Advanced Energy Materials

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Despite impressive merits of complementary charge‐storage mechanisms for aqueous Zn‐ion hybrid micro‐supercapacitors (ZHMSCs), it remains a challenge to solve dendrite and parasitic reactions issues of Zn anodes. Herein, a kinetics‐boosted strategy of Zn2+ transport and desolvation of hydrated Zn2+ is proposed by engineering zwitterionic P(AM‐co‐SBMA) hydrogel electrolyte (PASHE) for highly reversible Zn plating/stripping. Mechanically robust and chemically anchored PASHE features zwitterionic groups for constructing ion migration channels and immobilizing water molecules, which accelerates Zn2+ migration for an ultrahigh transfer number (0.84) and alleviates water‐related parasitic reactions. Theoretical calculations combined with experimental results reveal that sulfobetaine sulfonate anions endow PASHE with improved desolvation kinetics and the ability to coordinate Zn2+ flux and electric field distributions at the electrolyte–electrode interface. Thus, Zn anodes exhibit excellent electrochemical performance involving high average coulombic efficiency of 99.4% in Zn|PASHE|Cu cell as well as high cumulative capacity of 2000 mAh cm−2 (20 mA cm−2, 1 mAh cm−2) and depth of discharge of 80.9% (20 mA cm−2, 10 mAh cm−2) in Zn|PASHE|Zn cells. Furthermore, ZHMSCs based on PASHE deliver excellent flexibility and cyclability for energy‐storage applications. This work provides useful insights on hydrogel electrolyte engineering for developing high‐performance Zn anodes and derived energy‐storage devices.

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Section: Resultsmentioning

confidence: 79%

Kinetics‐Boosted Effect Enabled by Zwitterionic Hydrogel Electrolyte for Highly Reversible Zinc Anode in Zinc‐Ion Hybrid Micro‐Supercapacitors

Zhang

Guo

et al. 2022

Advanced Energy Materials

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“…6c reveals that the CV plots possess a non-ideal rectangular shape, which corresponds well to the asymmetrical energy-storage mechanisms of the cathode and anode, in agreement with other representative carbon-based ZHSC devices. 62,63 These results demonstrate that the use of the SPS–Zn hydrogel electrolyte does not affect the charge storage mechanism of the carbon cathode and Zn anode. Fig.…”

Section: Resultsmentioning

confidence: 82%

Construction of zwitterionic osmolyte-based hydrogel electrolytes towards stable zinc anode for durable aqueous zinc ion storage and integrated electronics

et al. 2022

J. Mater. Chem. A

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“…A peak at 1321 cm –1 related to C–H bending is also observed. , The above characteristic bonds of pure agar and PAAm can be detected in the spectrum of PAAm/agar with a small change in frequencies, confirming that the agar was successfully introduced into the PAAm skeleton . Furthermore, the typical feature peaks at 1253, 1033, and 770 cm –1 of the PAAm/agar/Zn(CF 3 SO 3 ) 2 hydrogel electrolyte can be observed, which belong to the symmetric CF 3 stretching vibration, the symmetric SO 3 stretching vibration, and symmetric CF 3 deformation mode of CF 3 SO 3 – species, respectively. − The obtained results further confirm the existence of Zn(CF 3 SO 3 ) 2 salt in the hydrogel electrolyte. Figure c shows that the freeze-dried PAAm/agar/Zn(CF 3 SO 3 ) 2 hybrid hydrogel electrolyte possesses an interconnected wrinkled morphology with massive homogeneously scattered pores within the matrix.…”

Section: Resultsmentioning

confidence: 66%

Natural Polysaccharide Strengthened Hydrogel Electrolyte and Biopolymer Derived Carbon for Durable Aqueous Zinc Ion Storage

Liu

et al. 2022

ACS Appl. Mater. Interfaces

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Aqueous zinc-ion hybrid supercapacitors (ZHSCs) represent one of the current research subjects because of their flame retardancy, ease of manufacturing, and exceptional roundtrip efficiency. With the evolution into real useful energy storage cells, the bottleneck factors of the corrosion and dendrite growth problems must be properly resolved for largely boosting their cycling life and energy efficiency. Herein, a natural polysaccharide strengthened hydrogel electrolyte (denoted as PAAm/agar/Zn(CF3SO3)2) was engineered by designing an asymmetric dual network of covalently cross-linked polyacrylamide (denoted as PAAm) and physically cross-linked loose polysaccharide (e.g., agar) followed by intense uptake of Zn(CF3SO3)2 aqueous electrolyte. In this polymeric matrix, the PAAm chains are responsible for constructing the soft domains to immobilize the water molecules, and the agar component boosts the mechanical performance (by using its inherent reversible sacrificial bonds) and favors the electrolyte ion transport. Due to these reasons, the as-designed hydrogel electrolyte effectively inhibits the zinc dendrite growth, realizes the uniform Zn deposition, and affords a satisfactory ionic conductivity of 1.55 S m–1, excellent tensile strength (78.9 kPa at 507.7% stretchable), and high compression strength (118.0 kPa at 60.0% strain). Additionally, a biopolymer-derived N-doped carbon microsphere cathode material with a highly interconnected porous carbonaceous network (denoted as NC) was also synthesized, which delivers a high capacity of 92.8 mAh g–1, along with superb rate capability and long duration cycling lifespan (95.4% retention for 10000 cycles) in the aqueous Zn//NC ZHSC. More notably, with integrated merits of the PAAm/agar/Zn(CF3SO3)2 hydrogel electrolyte and NC, the as-built quasi-solid-state ZHSC achieves a high specific capacity of 73.4 mAh g–1 and superior energy density of 61.3 Wh kg–1 together with excellent cycling stability for 10000 cycles. This work demonstrated favorable practicability in the structural design of the hydrogel electrolytes and electrode materials for advanced ZHSC applications.

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A safe and robust dual-network hydrogel electrolyte coupled with multi-heteroatom doped carbon nanosheets for flexible quasi-solid-state zinc ion hybrid supercapacitors

Abstract: Aqueous zinc ion hybrid supercapacitors (ZHSCs) are receiving increasing research interests because of their superiority in safety, economy, and high water compatibility. However, the corrosion problems coupled with the dendrite...

Cited by 35 publications

References 89 publications

Kinetics‐Boosted Effect Enabled by Zwitterionic Hydrogel Electrolyte for Highly Reversible Zinc Anode in Zinc‐Ion Hybrid Micro‐Supercapacitors

Kinetics‐Boosted Effect Enabled by Zwitterionic Hydrogel Electrolyte for Highly Reversible Zinc Anode in Zinc‐Ion Hybrid Micro‐Supercapacitors

Construction of zwitterionic osmolyte-based hydrogel electrolytes towards stable zinc anode for durable aqueous zinc ion storage and integrated electronics

Natural Polysaccharide Strengthened Hydrogel Electrolyte and Biopolymer Derived Carbon for Durable Aqueous Zinc Ion Storage

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