Effect of mixed cations in synergizing the performance characteristics of PVA-based polymer electrolytes for novel category Zn/AgO polymer batteries—a preliminary study

Vatsalarani, J.; Kalaiselvi, N.; Karthikeyan, R.

doi:10.1007/s11581-008-0244-x

Cited by 12 publications

(4 citation statements)

References 21 publications

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“…After 100 chargedischarge cycles, the Zn/Ni battery with this electrolyte exhibited 55% capacity retention. Zn(CH 3 COO) 2 and Zn (CF 3 SO 3 ) 2 were tested as a salt mixture in the PVA/KOH system and synergized the thermal stability and ion conductivity of the blended electrolyte 92 . For these two SPEs, that with Zn(CF 3 SO 3 ) 2 was found to improve the dimensional stability of PVA/KOH films more distinctly than that with Zn(CH 3 COO) 2 .…”

Section: Pva and Its Derivativesmentioning

confidence: 99%

Pursuit of reversible Zn electrochemistry: a time-honored challenge towards low-cost and green energy storage

et al. 2020

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The world's mounting demands for environmentally benign and efficient resource utilization have spurred investigations into intrinsically green and safe energy storage systems. As one of the most promising types of batteries, the Zn battery family, with a long research history in the human electrochemical power supply, has been revived and reevaluated in recent years. Although Zn anodes still lack mature and reliable solutions to support the satisfactory cyclability required for the current versatile applications, many new concepts with optimized Zn/Zn 2+ redox processes have inspired new hopes for rechargeable Zn batteries. In this review, we present a critical overview of the latest advances that could have a pivotal role in addressing the bottlenecks (e.g., nonuniform deposition, parasitic side reactions) encountered with Zn anodes, especially at the electrolyte-electrode interface. The focus is on research activities towards electrolyte modulation, artificial interphase engineering, and electrode structure design. Moreover, challenges and perspectives of rechargeable Zn batteries for further development in electrochemical energy storage applications are discussed. The reviewed surface/interface issues also provide lessons for the research of other multivalent battery chemistries with low-efficiency plating and stripping of the metal.

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Section: Pva and Its Derivativesmentioning

confidence: 99%

Pursuit of reversible Zn electrochemistry: a time-honored challenge towards low-cost and green energy storage

et al. 2020

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“…33 They reported that the crystalline peak intensity decreases in the XRD pattern of PVA indicate the increased amorphous nature with the addition of dopants. 34 Therefore, the diminished crystalline peak intensity at 2θ = 11.84°i n the XRD pattern of PVA/ZnAc SPEs for 20 wt% of ZnAc loading is attributed to the presence of amorphous rich phase. 35 Further, it is observed that the variation of crystallite size and crystallinity in PVA/ZnAc SPEs is in accordance with the free volumes of the system.…”

Section: Resultsmentioning

confidence: 96%

Free Volume Controlled Ionic Conductivity in Poly Vinyl Alcohol/Zinc Acetate Solid Polymer Electrolytes

Valsan

Adriani

Raghavendra

et al. 2020

J. Electrochem. Soc.

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Poly vinyl alcohol (PVA)/Zinc acetate (ZnAc) Solid Polymer Electrolytes (SPEs) of different ZnAc weight percentage (5%, 10%, 15%, 20%) were prepared. Positron Lifetime Spectroscopy (PLS) studies reveal the increased fractional free volume (Fv) from 1.93% to 2.16% for 20 wt% of ZnAc loading. The increased ionic conductivity of PVA/ZnAc SPEs for 20 wt% of ZnAc loading suggests the increased concentration of Zn2+ cations and acetate anions. The ionic conductivity of PVA/ZnAc SPEs increases at higher frequencies of the applied electric field due to the increased polarization of dipoles. The increased ionic conductivity of PVA/ZnAc SPEs with increased fractional free volume suggests that the mobility of Zn2+ and acetate ions is favored by the amorphous phase of the SPEs. The XRD results justify the increased amorphousness of PVA/ZnAc SPEs. FTIR studies confirm the formation of polymer salt complexes due to chemical bonding between C–H group of PVA and carbonyl group of (C=O) of ZnAc salt.

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“…Assembling with Zn and MnO 2 electrodes on a polymer host poly(3,4‐ethylene dioxythiophene) (PEDOT) as shown in Figure a, the fabricated Zn/MnO 2 @PEDOT flexible battery presents a high capacity of 282.4 mAh g −1 , 77.7% of its initial capacity and nearly 100% Coulombic efficiency after 300 cycles (Figure 8b). Mohamad et al [ 92 ] and Vatsalarani et al [ 93 ] have also developed PVA‐based SPEs for alkaline ZIBs, which exhibited a high ionic conductivity of 8.7 × 10 −3 S cm −1 , where KOH and Zn(CH 3 COO) 2 are dissolved into the complex. Assembling within a Zn/AgO battery configuration, a minimum specific capacity loss of ≈3% has been observed over 20 cycles.…”

Section: Hydrogel Polymer Electrolytementioning

confidence: 99%

Insights on Flexible Zinc‐Ion Batteries from Lab Research to Commercialization

et al. 2021

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fields such as healthcare, automotive, and aviation. Among them, flexible and wearable electronics exhibit a growing interest such as implantable medical devices, [1] wearable health monitoring systems, [1,2] flexible displays, [3] and smart clothes. [4] Conventional devices utilizing rigid and relatively unsafe lithium-ion batteries (LIBs) as the power supply cannot satisfy the future requirements of biocompatible and flexible features. Moreover, the bottleneck of flexible LIBs, such as the high cost, safety issues and intricate manufacturing requirements restrict the commercialization of flexible LIBs. As promising alternatives, aqueous zinc-ion batteries (AZIBs) have attracted a significant attention. They are regarded as competitive candidates for flexible devices owing to the high volumetric capacity (5855 mAh cm −3 ) of the zinc metal and its facile fabrication process. Meanwhile, the superior cost advantage, $25/kWh [5] for AZIBs comparing to $135/kWh [6,7] for LIBs, is beneficial to applying AZIBs in different scales of devices.Aqueous zinc ion batteries (AZIBs) currently suffer from unfavorable water-induced side reactions that result in zinc dendrite formation, dissolution of cathode materials and the formation of byproducts on cathodes, thus causing a fast capacity fade. Owing to the water electrolysis (stable Owing to the development of aqueous rechargeable zinc-ion batteries (ZIBs), flexible ZIBs are deemed as potential candidates to power wearable electronics. ZIBs with solid-state polymer electrolytes can not only maintain additional load-bearing properties, but exhibit enhanced electrochemical properties by preventing dendrite formation and inhibiting cathode dissolution. Substantial efforts have been applied to polymer electrolytes by developing solid polymer electrolytes, hydrogel polymer electrolytes, and hybrid polymer electrolytes; however, the research of polymer electrolytes for ZIBs is still immature. Herein, the recent progress in polymer electrolytes is summarized by category for flexible ZIBs, especially hydrogel electrolytes, including their synthesis and characterization. Aiming to provide an insight from lab research to commercialization, the relevant challenges, device configurations, and life cycle analysis are consolidated. As flexible batteries, the majority of polymer electrolytes exploited so far only emphasizes the electrochemical performance but the mechanical behavior and interactions with the electrode materials have hardly been considered. Hence, strategies of combining softness and strength and the integration with electrodes are discussed for flexible ZIBs. A ranking index, combining both electrochemical and mechanical properties, is introduced. Future research directions are also covered to guide research toward the commercialization of flexible ZIBs.

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Effect of mixed cations in synergizing the performance characteristics of PVA-based polymer electrolytes for novel category Zn/AgO polymer batteries—a preliminary study

Cited by 12 publications

References 21 publications

Pursuit of reversible Zn electrochemistry: a time-honored challenge towards low-cost and green energy storage

Pursuit of reversible Zn electrochemistry: a time-honored challenge towards low-cost and green energy storage

Free Volume Controlled Ionic Conductivity in Poly Vinyl Alcohol/Zinc Acetate Solid Polymer Electrolytes

Insights on Flexible Zinc‐Ion Batteries from Lab Research to Commercialization

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