Salt-concentrated acetate electrolytes for a high voltage aqueous Zn/MnO2 battery

Chen, Shigang; Lan, Rong; Humphreys, John; Tao, Shanwen

doi:10.1016/j.ensm.2020.03.011

Cited by 149 publications

(125 citation statements)

References 73 publications

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“…Hence, using acetate electrolyte is beneficial to enrich the surface properties of MnO 2 cathode, and also to stabilize the Zn anode simultaneously. Tao and co‐workers demonstrated the dissolution of zinc acetate concurrently with exceptionally high salt concentrated potassium acetate aqueous solution [1 m Zn(CH 3 COO) 2 +31 m KCH 3 COO] to form “water in bisalt” electrolyte [119] . “Water in salt” electrolyte is also an important type of electrolyte in other devices [120] .…”

Section: Electrolyte Selectionmentioning

confidence: 99%

Recent Development of Mn‐based Oxides as Zinc‐Ion Battery Cathode

2021

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Manganese‐based oxide is arguably one of the most well‐studied cathode materials for zinc‐ion battery (ZIB) due to its wide oxidation states, cost‐effectiveness, and matured synthesis process. As a result, there are numerous reports that show significant strides in the progress of Mn‐based oxides as ZIB cathode. However, ironically, due to the sheer number of Mn‐based oxides that have been published in recent years, there remain certain contemplations with regards to the electrochemical performance of each type of Mn‐based oxides and their performance comparison among various Mn polymorphs and oxidation states. Thus, to provide a clearer indication of the development of Mn‐based oxides, the recent progress in Mn‐based oxides as ZIB cathode was summarized systematically in this Review. More specifically, (1) the classification of Mn‐based oxides based on the oxidation states (i. e., MnO2, Mn3O4, Mn2O3, and MnO), (2) their respective polymorphs (i. e., α‐MnO2 and δ‐MnO2) as ZIB cathode, (3) the modification strategies commonly employed to enhance the performance, and (4) the effects of these modification strategies on the performance enhancement were reviewed. Lastly, perspectives and outlook of Mn‐based oxides as ZIB cathode were discussed at the end of this Review.

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Section: Electrolyte Selectionmentioning

confidence: 99%

Recent Development of Mn‐based Oxides as Zinc‐Ion Battery Cathode

2021

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“…Therefore, proper electrolyte formulation is very important for the construction of high‐voltage hybrid AZBs by this strategy. Recently, highly concentrated dual‐ion electrolytes (HCE) and “water‐in‐salt” electrolytes [ 19,69,70 ] have been demonstrated to be capable of expanding the working potential of redox electrodes. For instance, Zhi and co‐workers designed an aqueous HCE for the assembly of a high‐voltage zinc hybrid battery consisiting of a Zn anode and an LVPF cathode, as shown in Figure a.…”

Section: Toward High‐voltage Azbs: Strategies and Advancementsmentioning

confidence: 99%

High‐Voltage Rechargeable Aqueous Zinc‐Based Batteries: Latest Progress and Future Perspectives

Xie

Zhang

et al. 2021

Small Science

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Rechargeable aqueous zinc‐based batteries (AZBs) have been recently considered as desirable energy storage devices for renewable energy storage because of their high theoretical capacity, low cost, and high safety. Despite the inspiring achievements in this field, the energy density of AZBs is still far below expectation, which directly hinders their practical application as next‐generation secondary cells. To address this issue, previously, reseach efforts have been mainly dedicated to the improvement of capacity by designing different kinds of high‐capacity electrode candidates, especially the cathode materials. In recent years, elevation of the output voltage for energy density improvement has gained more and more attention. The main limitation of the relatively low output voltage of AZBs lies in the narrow electrochemically stable window of aqueous electrolytes, which results in limited choice of cathode materials with high potential. Herein, by summarizing recently reported work in this field, the strategies applied to high‐voltage AZB construction are classified into two categories, from the aspects of electrode and battery structure. Classic examples of each category are discussed in detail, and their respective advantages/defects are compared and commented on. Finally, further challenges are elaborated to provide more insights into this area.

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“…Consequently, the voltage of this MnO 2 //Zn battery with "water-in-bisalt" electrolyte could be further extended to 2.0 V and presented a capacity of 304.6 mAh g −1 . [72] Then, the application of bi-cation electrolytes to improve the operating potential of ZIBs has also been developed. Li et al demonstrated a ZIB with a broader voltage window employing bi-cation (1 m Al(CF 3 SO 3 ) 3 /1 m Zn(CF 3 SO 3 ) 2 ) as the electrolyte and α-MnO 2 as the cathode, achieving a discharge voltage of 1.7 V, ≈0.3 V higher than the value of the mono-cation electrolyte reported earlier.…”

Section: (17 Of 30)mentioning

confidence: 99%

“…Consequently, the voltage of this MnO 2 //Zn battery with “water‐in‐bisalt” electrolyte could be further extended to 2.0 V and presented a capacity of 304.6 mAh g −1 . [ 72 ]…”

Section: Cathode Materialsmentioning

confidence: 99%

High‐Voltage Zinc‐Ion Batteries: Design Strategies and Challenges

Yan

Ang

Yang

et al. 2021

Adv Funct Materials

144

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(1 of 30)additionally, it leads to reliable and manageable energy delivery. [2] Lithium-ion batteries (LIBs) have been the first choice for EES owing to their remarkable energy density, excellent cycle life, and small volume compared to other rechargeable batteries since they were successfully sold by SONY in 1991. [3] Nevertheless, their widespread applications have been limited due to sterile Li resources, high cost, toxic electrolytes, safety problems, and other disadvantages. [4] To date, environmentally friendly aqueous batteries using multi-valent charge carriers, such as Zn 2+ , Mg 2+ , and Al 3+ , have attracted attention because multiple electrons are involved in the redox reactions during intercalation, as well as higher capacity and energy density can be achieved. However, only a few cathode materials are available for Mg 2+ diffusion, and the passivation of Mg anode greatly restricts the further transport of Mg 2+ ions. Al battery anode also forms a protective oxide (Al 2 O 3 ) film in the aqueous electrolyte, which affects the battery performance. Hence, Mg and Al batteries are under investigation and are still a long way from practical application and commercialization. [5] ZIBs have attracted interest in grid-scale energy storage compared to other energy storage technologies owing to the following advantages: 1) ZIBs can be easily manufactured in an open-air environment, so the total cost of manufacturing ZIBs is much lower than other batteries (Li + /Na + /K + -ion) which require an inert environment for production. [6] 2) The price of Zn (0.5−1.5 $/lb) is much lower than that of Li (8−11 $/lb), and the reserves of Zn (79 ppm) are approximately four times than those of Li (17ppm). [7] 3) Zn as an anode exhibits a high theoretical volumetric (5855 mAh cm −3 ) and gravimetric capacity (820 mAh g −1 ), low electrochemical potential of −0.762 V versus the standard hydrogen electrode (SHE), and two-electron transfer during redox reaction, contributing to a high-energy density. [8] 4) ZIBs are highly safe, not only because Zn anode is non-toxic and stable in the general environment, but also because a majority of ZIBs electrolytes used are aqueous with higher ionic conductivity (10 −1 −6 S cm −1 ) than flammable and toxic organic solvents (10 −3 −10 −2 S cm −1 ). [9] Furthermore, the normal Zn salts (ZnSO 4

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Salt-concentrated acetate electrolytes for a high voltage aqueous Zn/MnO2 battery

Abstract: Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.

Cited by 149 publications

References 73 publications

Recent Development of Mn‐based Oxides as Zinc‐Ion Battery Cathode

Recent Development of Mn‐based Oxides as Zinc‐Ion Battery Cathode

High‐Voltage Rechargeable Aqueous Zinc‐Based Batteries: Latest Progress and Future Perspectives

High‐Voltage Zinc‐Ion Batteries: Design Strategies and Challenges

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