Investigations on Ion Transport Behaviour in a Non-Lithium Chemical Based Solid Polymer Electrolyte (SPE): [PEO:ZnA]

Karan, Santanu; Sahu, Tripti Bala; Sahu, Manju; Agrawal, Ritesh

doi:10.1016/j.matpr.2016.01.034

Cited by 9 publications

(4 citation statements)

References 13 publications

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“…[ 182,183 ] Karan prepared (1‐ x ) PEO: x Zn (CH 3 COO) 2 SPEs with the conductivity of 1.22 × 10 −7 S cm −1 and the Zn ion migration number of 0.17 by hot press casting technique. [ 184 ] In the same situation, the conductivity of the SPEs obtained by replacing the zinc salt with Zn(OTf) 2 had increased by ten times (1.09 × 10 −6 S cm −1 ), indicating that the selection of the appropriate salts was also crucial to the electrochemical performance of the electrolytes. [ 185 ] However, the ionic conductivity of these PEO‐based SPEs still cannot meet the minimum requirements for the conductivity of solid electrolytes (>0.1 mS cm −1 ).…”

Section: Solid‐state Electrolytes For Zibsmentioning

confidence: 99%

Recent Advances in Electrolytes for “Beyond Aqueous” Zinc‐Ion Batteries

et al. 2021

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Designing high performance electrolyte is an efficient strategy to circumvent these problems. As one of the most important components, electrolytes provide the basic operating environment to guarantee the transmission of the Zn 2+ between the two electrodes during the charge-discharge processes, affect the Zn 2+ /Zn plating/ stripping on the anode and deciding the electrochemically stable potential windows. [12] Since the utilization of alkaline electrolytes in batteries in earlier studies, Zn|KOH|MnO 2 batteries became a hot topic. [13] However, the using of an alkaline electrolyte always leads to the growth of Zn dendrites and the corrosion of the anode, resulting in rapid capacity fading. [14][15][16] Until 1986, the replacement of corrosive alkaline electrolyte systems by neutral aqueous electrolytes greatly improved the performance and safety of ZIBs. [17] Although the aqueous electrolytes alleviated the corrosion of the Zn electrode in some extent, the problems related to the growth of dendrites and the dissolution of the cathode, especially the limited electrochemical stability window (≈1.23 V) still are the challenge in the application of ZIBs. [18][19][20] The aqueous electrolytes of ZIBs often suffer from the water splitting process, including hydrogen evolution reaction and oxygen evolution reaction. [21][22][23] Therefore, in order to overcome the problems mentioned above, "beyond aqueous" electrolytes for ZIBs have attracted extensive attention in recent years. [24][25][26] At present, the "beyond aqueous" electrolytes for ZIBs have been reported mainly include liquid organic electrolytes and solid electrolytes. Zn anode in the organic electrolytes have high thermodynamic stability, avoiding the appearance of passivation products inevitably generated in traditional aqueous solution, i.e., ZnO and Zn(OH) 4 −2. [27] Solid-state electrolytes have sufficient mechanical strength to inhibit the growth of dendrites. [28] Moreover, the "beyond aqueous" electrolytes without water fundamentally avoid the decomposition of water and the formation of side products related to water. Compared with aqueous electrolytes, the "beyond aqueous" electrolytes exhibit a wide electrochemical stability window (Figure 1) and excellent thermodynamic stability of Zn anode leading to Zn plating/ stripping high reversibility with higher Coulombic efficiencies (CEs). [29] Although significant advances have been made in improving the electrochemical performance of the "beyond aqueous" electrolytes for ZIBs, several severe issues still exist, which largely prevent the development of "beyond aqueous" ZIBs. [30][31][32][33][34][35] The main issues of "beyond aqueous" electrolytes With the growing demands for large-scale energy storage, Zn-ion batteries (ZIBs) with distinct advantages, including resource abundance, low-cost, high-safety, and acceptable energy density, are considered as potential substitutes for Li-ion batteries. Although numerous efforts are devoted to design and develop high performance cathodes and aqueous electrolyt...

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Section: Solid‐state Electrolytes For Zibsmentioning

confidence: 99%

Recent Advances in Electrolytes for “Beyond Aqueous” Zinc‐Ion Batteries

et al. 2021

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“…6, a Zn 2+ ion is located at the turn along a bending PEO chain coordinated with two [73][74][75][76] , playing a crucial role in defining the electrolyte performance, have been thoroughly investigated. Compared to the hot-press casting samples with Zn(CH 3 COO) 2 75 , the SPEs containing Zn(CF 3 SO 3 ) 2 76 prepared by a similar process exhibited a higher ion conductivity because of the weaker binding of CF 3 SO 3 − to Zn 2+ . However, the solution casting samples with Zn(CH 3 COO) 2 74 showed an exceptionally good ion conductivity, surpassing that of Zn (CF 3 SO 3 ) 2 -containing SPEs, possibly owing to the higher percentage of amorphous phase.…”

Section: Peo 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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“…The maximum ionic conductivity could be obtained when the zinc salt concentration was 5% (1.22 × 10 −7 S cm −1 ). 145 In a subsequent work, Karan et al added Zn(CF 3 SO 3 ) 2 salt to PEO electrolyte and studied the effect of salt concentration on the ionic conductivity. The results show that the PEO : Zn(CF 3 SO 3 ) 2 ratio is 9 : 1, and the conductivity of the electrolyte is 1.09 × 10 −6 S cm −1 .…”

Section: All-solid-state Electrolytesmentioning

confidence: 99%