Non-flammable, dilute, and hydrous organic electrolytes for reversible Zn batteries

Ma, Guoqiang; Miao, Licheng; Yuan, Wentao; Qiu, Kaiyue; Liu, Mengyu; Nie, Xueyu; Dong, Yang; Zhang, Ning; Cheng, Peng

doi:10.1039/d2sc04143j

Cited by 60 publications

(28 citation statements)

References 51 publications

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“…The DOD of the batteries is also an important factor affecting the lifetime of the Zn anode . In previous reports, the DOD values of Zn anodes are mostly less than 10%. , The low DOD not only conceals the true loss of Zn anodes during cycling but also adversely affects an objective assessment of the battery system. To address these issues and evaluate the effect of the dynamic adaptive interphase, we assembled hybrid cells employing 10 μm thick Zn foil (∼5.85 mAh cm –2 ) and a high-loading LMO cathode (LMO loading ∼18 mg cm –2 ) with a DOD value of ∼45.5%.…”

Section: Resultsmentioning

confidence: 99%

Bifunctional Dynamic Adaptive Interphase Reconfiguration for Zinc Deposition Modulation and Side Reaction Suppression in Aqueous Zinc Ion Batteries

Wang

Zhou

et al. 2023

ACS Nano

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Dendrite growth and electrode/electrolyte interface side reactions in aqueous zinc-ion batteries (AZIBs) not only impair the battery lifetime but also pose serious safety concerns for the battery system, hindering its application in large-scale energy storage systems. Herein, by introducing positively charged chlorinated graphene quantum dot (Cl-GQD) additives into the electrolyte, a bifunctional dynamic adaptive interphase is proposed to achieve Zn deposition regulation and side reaction suppression in AZIBs. During the charging process, the positively charged Cl-GQDs are adsorbed onto the Zn surface, acting as an electrostatic shield layer that facilitates smooth Zn deposition. In addition, the relative hydrophobic properties of chlorinated groups also build a hydrophobic protective interface for the Zn anode, mitigating the corrosion of the Zn anode by water molecules. More importantly, the Cl-GQDs are not consumed throughout the cell operation and exhibit a dynamic reconfiguration behavior, which ensures the stability and sustainability of this dynamic adaptive interphase. Consequently, the cells mediated by the dynamic adaptive interphase enable dendrite-free Zn plating/stripping for more than 2000 h. Particularly, even at 45.5% depth of discharge, the modified Zn//LiMn 2 O 4 hybrid cells still retain 86% capacity retention after 100 cycles, confirming the feasibility of this simple approach for application with limited Zn sources.

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Section: Resultsmentioning

confidence: 99%

Bifunctional Dynamic Adaptive Interphase Reconfiguration for Zinc Deposition Modulation and Side Reaction Suppression in Aqueous Zinc Ion Batteries

Wang

Zhou

et al. 2023

ACS Nano

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“…In light of this, combining the merits of aqueous electrolytes and organic electrolytes, researchers have developed organic/aqueous hybrid electrolytes, where the organic solvents are regarded as cosolvents in aqueous electrolytes. Alcohols [27,[40][41][42][43][44][45] , ethers [25,69,120,121] , esters [50,31,[122][123][124] , sulfones [39,46] , nitriles [47][48][49] , and amides [125,126] are the currently known organic cosolvents. Abundant carboxyl groups in alcohols can be seen as H-bond acceptors; these carboxyl groups interact with water and break water H-bond networks, thereby reducing the activity of water.…”

Section: Solventmentioning

confidence: 99%

. Insights into the design of mildly acidic aqueous electrolytes for improved stability of Zn anode performance in zinc-ion batteries

2023

Energy Mater

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Mildly acidic aqueous zinc (Zn) batteries are promising for large-energy storage but suffer from the irreversibility of Zn metal anodes due to parasitic H 2 evolution, Zn corrosion, and dendrite growth. In recent years, increasing efforts have been devoted to overcoming these obstacles by regulating electrolyte structures. In this review, we investigate progress towards mildly acidic aqueous electrolytes for Zn batteries, with special emphasis on how the microstructures (in the bulk phase and on the surface of Zn anodes) affect the performance of Zn anodes. Moreover, effective computational simulations and characterization measurements for the structures of bulk electrolytes and Zn/electrolyte interfaces are discussed, along with perspectives for the direction of further investigations.

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“…[13][14][15] Meanwhile, excessive free H 2 O molecules could easily trigger corrosion, gas production or other side effects, hindering the practical application of Zn metal anode. [16][17][18] Many studies have proved the availability of Zn metal anode in H 2 O-poor environment. [19] In contrary, enough H 2 O molecules are urgently needed to support the activation of manganese-based materials and the MnO 2 /Mn 2+ deposition/dissolution process.…”

Section: Introductionmentioning

confidence: 99%

Quasi‐Decoupled Solid–Liquid Hybrid Electrolyte for Highly Reversible Interfacial Reaction in Aqueous Zinc–Manganese Battery

Pan

Liu

et al. 2023

Advanced Energy Materials

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Aqueous zinc–manganese batteries with low cost, reliable safety, and considerable energy density, show promise for grid‐scale storage. Their durable operation is highly dependent on the reversibility and stability of both electrode interfaces, which is limited by the different requirements of the interfaces of manganese‐based cathodes and zinc anodes. Here, a quasi‐decoupled solid–liquid hybrid electrolyte is proposed, which demonstrates good compatibility and high reversibility for both interfaces with different electrolyte environments, showing quasi‐decoupling characteristics. Such a hybrid electrolyte can endow the anode interface with abundant favorable nucleation sites for achieving uniform zinc platting/stripping, as well as limit the presence of free H2O molecules, to suppress side‐reactions. This electrolyte is also adapted to a reversible and stable MnO2/Mn2+ manganese deposition/dissolution reaction at the cathode interface by restricting OH−/H+ ion diffusion, preventing formation of irreversible electrochemically inert MnOOH. As a result, the quasi‐decoupled solid–liquid hybrid electrolyte enables Zn||Zn cycling for more than 500 h, and a specific capacity of a Zn||α‐MnO2 battery up to 348 mAh g−1 at 0.2 A g−1. It also allows 87% capacity retention after 500 cycles at 0.5 A g−1. This work provides a new insight into electrolyte design that focuses on the different requirements of differing electrode interfaces.

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Non-flammable, dilute, and hydrous organic electrolytes for reversible Zn batteries

Abstract: Rechargeable Zn batteries hold great practicability for cost-effective sustainable energy storage but suffer from irreversibility of Zn anode in aqueous electrolytes due to parasitic H2 evolution, corrosion, and dendrite growth....

Cited by 60 publications

References 51 publications

Bifunctional Dynamic Adaptive Interphase Reconfiguration for Zinc Deposition Modulation and Side Reaction Suppression in Aqueous Zinc Ion Batteries

Bifunctional Dynamic Adaptive Interphase Reconfiguration for Zinc Deposition Modulation and Side Reaction Suppression in Aqueous Zinc Ion Batteries

. Insights into the design of mildly acidic aqueous electrolytes for improved stability of Zn anode performance in zinc-ion batteries

Quasi‐Decoupled Solid–Liquid Hybrid Electrolyte for Highly Reversible Interfacial Reaction in Aqueous Zinc–Manganese Battery

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