Molecular Engineering Enables Hydrogel Electrolyte with Ionic Hopping Migration and Self‐Healability toward Dendrite‐Free Zinc‐Metal Anodes

Zhu, Kaiping; Luo, Jie; Zhang, Dehe; Wang, Nanyang; Pan, Shibo; Zhou, Shujin; Zhang, Zhenjie; Guo, Gengde; Yang, Peng; Fan, Yuan; Hou, Shisheng; Shao, Zhipeng; Liu, Shizhuo; Lin, Lin; Xue, Pan; Hong, Guo; Yang, Yurong; Yao, Yagang

doi:10.1002/adma.202311082

Cited by 21 publications

(1 citation statement)

References 52 publications

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“…Meanwhile, Wu et al [49] proposed a way to fabricate a hydrogel sensor suitable for dual sensing of temperature and strain using a salt-permeable strategy, and the sensor exhibited improved mechanical stability, frost resistance, and a wide operating range. Although their approaches improve the performance metrics of hydrogel sensors in different ways, none of them have been able to address the fundamental destabilizing effect on the detection results due to the fact that the polar migration of ions [50][51][52] occurs continuously within the hydrogel and results in resistance drift during monitoring in a conductive working circuit. Thus, this thesis proposes a self-calibration compensation mechanism that provides an idea for the improvement of hydrogel sensor stability and reliability.…”

Section: Introductionmentioning

confidence: 99%

Amphibious Multifunctional Hydrogel Flexible Haptic Sensor with Self-Compensation Mechanism

Sun,

Yin,

Liu

et al. 2024

Sensors

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In recent years, hydrogel-based wearable flexible electronic devices have attracted much attention. However, hydrogel-based sensors are affected by structural fatigue, material aging, and water absorption and swelling, making stability and accuracy a major challenge. In this study, we present a DN-SPEZ dual-network hydrogel prepared using polyvinyl alcohol (PVA), sodium alginate (SA), ethylene glycol (EG), and ZnSO4 and propose a self-calibration compensation strategy. The strategy utilizes a metal salt solution to adjust the carrier concentration of the hydrogel to mitigate the resistance drift phenomenon to improve the stability and accuracy of hydrogel sensors in amphibious scenarios, such as land and water. The ExpGrow model was used to characterize the trend of the ∆R/R0 dynamic response curves of the hydrogels in the stress tests, and the average deviation of the fitted curves ϵ¯ was calculated to quantify the stability differences of different groups. The results showed that the stability of the uncompensated group was much lower than that of the compensated group utilizing LiCl, NaCl, KCl, MgCl2, and AlCl3 solutions (ϵ¯ in the uncompensated group in air was 276.158, 1.888, 2.971, 30.586, and 13.561 times higher than that of the compensated group in LiCl, NaCl, KCl, MgCl2, and AlCl3, respectively; ϵ¯ in the uncompensated group in seawater was 10.287 times, 1.008 times, 1.161 times, 4.986 times, 1.281 times, respectively, higher than that of the compensated group in LiCl, NaCl, KCl, MgCl2 and AlCl3). In addition, for the ranking of the compensation effect of different compensation solutions, the concentration of the compensation solution and the ionic radius and charge of the cation were found to be important factors in determining the compensation effect. Detection of events in amphibious environments such as swallowing, robotic arm grasping, Morse code, and finger–wrist bending was also performed in this study. This work provides a viable method for stability and accuracy enhancement of dual-network hydrogel sensors with strain and pressure sensing capabilities and offers solutions for sensor applications in both airborne and underwater amphibious environments.

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Section: Introductionmentioning

confidence: 99%

Amphibious Multifunctional Hydrogel Flexible Haptic Sensor with Self-Compensation Mechanism

Sun,

Yin,

Liu

et al. 2024

Sensors

View full text Add to dashboard Cite

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Biopolymer‐Based Gel Electrolytes for Advanced Zinc Ion Batteries: Progress and Perspectives

Jia,

Wei,

et al. 2024

Adv Funct Materials

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In recent years, aqueous zinc ion batteries (ZIBs) with ultra‐high safety and environmental friendliness have emerged as a promising candidates for energy storage and energy conversion devices. However, the severe side reactions and dendrites issues discourage the practical application of ZIBs. Recently, biopolymer‐based gel electrolytes have disclosed large potential in tackling these challenges of ZIBs, with numerous advancements reported. Their advantages lie in suppressing side reactions including hydrogen evolution and Zn metal anode corrosion, as well as inhibiting the growth of Zn dendrites. This review comprehensively examines the classification, structures and properties of biopolymer‐based gel electrolytes, with a focus on hydrogel electrolytes derived from various natural macromolecular biopolymers, along with a brief discussion on non‐hydrogel electrolytes using ionic liquids or organic solutions as solvents. Subsequently, the preparation of biopolymer‐based gel electrolytes with physical and chemical methods are summarized. Furthermore, the practical applications of biopolymer‐based gel electrolytes in ZIBs with diverse cathodes materials are introduced. Finally, it highlights the environmental benefits and excellent electrochemical performance of biopolymer‐based gel electrolytes, outlining their prospects for the next generation of ZIBs and proposing future perspectives.

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Molecular Crowding Agent Modified Polyanionic Gel Electrolyte for Zinc Ion Batteries Operating at 100 °C

Huang,

He,

Huang

et al. 2024

Adv Funct Materials

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Aqueous zinc‐ion batteries (AZIBs) attract attention due to their safety and high specific capacity. However, their practical applications are constrained by Zn anode corrosion, dendritic growth, and poor high‐temperature adaptability induced by a strong hydrogen‐bond network in aqueous electrolytes. In this work, a dual network polyanionic gel electrolyte (denoted as PAM‐PAMPS‐10PD) is developed capable of withstanding high temperatures (100 °C) by in situ polymerization. The abundant anionic groups in the gel electrolyte greatly improve Zn2+ transport and inducing uniform deposition of Zn2+. Then the addition of the high‐boiling molecular crowding agent 1,5‐pentanediol (PD) can inhibit the water activity by enhancing hydrogen bonding with H2O and changing the solvation structure of Zn2+ to inhibit Zn anode corrosion. As a result, the symmetric battery using the PAM‐PAMPS‐10PD gel electrolyte can be stably cycled for at least 500 h at 100 °C and 0.5 mA cm−2/0.5 mAh cm−2, realizing dendrite‐free zinc anodes at high temperatures. Moreover, the Zn–AC full battery has a capacity retention of 47.8% after 3000 cycles at 100 °C and 4 mA cm−2. This study provides a beneficial reference for the design of high‐performance high‐temperature gel electrolytes and establishes a solid foundation for the practical application of AZIBs.

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Molecular Engineering Enables Hydrogel Electrolyte with Ionic Hopping Migration and Self‐Healability toward Dendrite‐Free Zinc‐Metal Anodes

Cited by 21 publications

References 52 publications

Amphibious Multifunctional Hydrogel Flexible Haptic Sensor with Self-Compensation Mechanism

Amphibious Multifunctional Hydrogel Flexible Haptic Sensor with Self-Compensation Mechanism

Biopolymer‐Based Gel Electrolytes for Advanced Zinc Ion Batteries: Progress and Perspectives

Molecular Crowding Agent Modified Polyanionic Gel Electrolyte for Zinc Ion Batteries Operating at 100 °C

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