A Binary Hydrate‐Melt Electrolyte with Acetate‐Oriented Cross‐Linking Solvation Shells for Stable Zinc Anodes

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(18)

Published: March 15, 2022

Aqueous zinc-ion batteries (ZIBs) with low cost and high safety are promising energy-storage devices. However, ZIBs metal Zn anodes usually suffer from coulombic efficiency poor cycling performance due to the occurrence of side reactions on anodes. Here, a binary hydrate-melt ZnCl2 /Zn(OAc)2 electrolyte is designed suppress hydrogen evolution reaction by-product formation by adjusting Zn2+ solvation structure. In structure electrolyte, carboxylate group in OAc- will coordinate , which weaken interaction between H2 O molecules achieve higher ionization energy molecules. Simultaneously, these groups can serve as H-bond acceptors construct H-bonds their neighboring structures, forming cross-linking network. Such network further suppresses water activity electrolyte. As result, such an effectively restricted thus 99.59% even after cycling. To illustrate feasibility aqueous ZIBs, Zn||p-chloranil cells assembled based The resultant exhibit enhanced compared cases conventional ZnSO4

Language: Английский

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Proton‐Reservoir Hydrogel Electrolyte for Long‐Term Cycling Zn/PANI Batteries in Wide Temperature Range

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(1)

Published: Nov. 8, 2022

Advanced aqueous batteries are promising for next generation flexible devices owing to the high safety, yet still requiring better cycling stability and capacities in wide temperature range. Herein, a polymeric acid hydrogel electrolyte (PAGE) with 3 M Zn(ClO4 )2 was fabricated performance Zn/polyaniline (PANI) batteries. With PAGE, even at -35 °C Zn/Zn symmetrical battery can keep stable more than 1 500 h under 2 mA cm-2 , Zn/PANI provide ultra-high specific capacity of 79.6 mAh g-1 70 000 cycles 15 A . This be mainly ascribed -SO3- H+ function group PAGE. It generate constant protons guide (002) plane formation accelerate PANI redox reaction kinetics, increase capacity, suppress side dendrites. proton-supplying strategy by may further propel development

Language: Английский

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Unraveling the deposition/dissolution chemistry of MnO₂ for high-energy aqueous batteries

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(3), P. 1016 - 1023

Published: Jan. 1, 2023

An electrochemical quartz crystal microbalance (EQCM) was used to in situ reveal the deposition/dissolution chemistry of MnO 2 aqueous electrolytes, which proceeds by a pH-dependent Mn( iii ) (MnOOH and/or Mn 3+ )-mediated path.

Language: Английский

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Boosting Cathode Activity and Anode Stability of Zn‐S Batteries in Aqueous Media Through Cosolvent‐Catalyst Synergy

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(42)

Published: Sept. 3, 2022

Aqueous Zn-S battery with high energy density represents a promising large-scale storage technology, but its application is severely hindered by the poor reversibility of both S cathode and Zn anode. Herein, we develop "cocktail optimized" electrolyte containing tetraglyme (G4) water as co-solvents I2 additive. The G4-I2 synergy could activate efficient polar I3- /I- catalyst couple shield from water, thus facilitating conversion kinetics suppressing interfacial side reactions. Simultaneously, it stabilize anode forming an organic-inorganic interphase upon cycling. With boosted electrodes reversibility, cell delivers capacity 775 mAh g-1 at 2 A , retains over 70 % after 600 cycles 4 . advances can also be readily generalized to other ethers/water hybrid electrolytes, showing universality design strategy.

Language: Английский

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Proton‐Assisted Aqueous Manganese‐Ion Battery Chemistry

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(17)

Published: Feb. 22, 2022

Aqueous manganese-ion batteries (MIBs) are promising energy storage systems because of the distinctive merits Mn metal, in terms high abundance, low cost, nontoxicity, theoretical capacity and redox potential. Conventional MIBs based on Mn2+ ion mechanism, whereas cathode materials is generally limited due to charge density large solvated ionic radius ions aqueous electrolytes. Herein, proton intercalation chemistry introduced MIBs, which layered Al0.1 V2 O5 ⋅1.5 H2 O (AlVO) exhibits a consequent H+ intercalation/extraction process. Such an mechanism contributes enhanced electrochemical performance, including capacity, fast reaction kinetics stable cycling behavior. Benefiting from this chemistry, Mn||AlVO cells could deliver specific power simultaneously. This work provides route for design high-performance MIBs.

Language: Английский

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MnAl Layered Double Hydroxides: A Robust Host for Aqueous Ammonium‐Ion Storage with Stable Plateau and High Capacity

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 13(5)

Published: Dec. 2, 2022

Abstract Rechargeable aqueous batteries based on ammonium‐ions shows great potential in low‐cost energy storage systems owing to their prominent superior characteristics, including ultrafast kinetics, long‐term lifespan, and environmental friendliness. Nevertheless, development is severely challenged by the fact that as‐reported cathode materials generally fail satisfy requirements high capacity stable working voltage simultaneously. Herein, first NH 4 + behavior a MnAl layered double hydroxide (LDH) series reported. Intriguingly, at 0.2 V observed optimized Mn 3 Al 1 ‐LDH sample with discharge of 183.7 mAh g −1 0.1 A . When assembling rocking‐chair battery using 3,4,9,10‐perylenetetracarboxylic diimide anode, full delivers density 45.8 Wh kg , surpassing most its recently reported counterparts. rapid amorphization conversion LDH during charge process revealed, which should be beneficial isotropic transport accompanied highly reversible building/breaking hydrogen bonds. The results realize novel inorganic material performance for ammonium‐ion batteries, facilitate ion provides new insight into electrode design batteries.

Language: Английский

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High-Energy Sn–Ni and Sn–Air Aqueous Batteries via Stannite-Ion Electrochemistry

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(19), P. 10880 - 10889

Published: May 2, 2023

Tin is promising for aqueous batteries (ABs) due to its multiple electrons' reactions, high corrosion resistance, large hydrogen overpotential, and excellent environmental compatibility. However, restricted the thermodynamic barrier poor electrochemical kinetics, efficient alkaline Sn plating/stripping at facile conditions has not yet been realized. Here, first time, we demonstrate a highly reversible stannite-ion electrochemistry construct novel paradigm of high-energy Sn-based ABs. Combined spectroscopic characterization, evaluation, theoretical computation reveal merits with low reaction energy feasible H2O participation in Sn-ion reduction as well kinetic fastened surface charge transfer SnO22- diffusion. The resultant anode delivers potential -1.07 V vs Hg/HgO, specific capacity 450 mA h g-1, Coulombic efficiency near 100%, superb rate capability 45.5 A cycling durability without dendrite dead Sn. As proof concept, developed new ABs, including 1.45 Sn-Ni 314 W kg-1 (58 kW over 15,000 cycles) 1.0 Sn-air 420 (lifespan 1900 h), on basis masses from cathode active materials. findings prove feasibility metal anode, suite ABs may be immediate benefit toward safe, reliable, affordable storage.

Language: Английский

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Towards More Sustainable Aqueous Zinc‐Ion Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(22)

Published: March 25, 2024

Abstract Aqueous zinc‐ion batteries (AZIBs) are considered as the promising candidates for large‐scale energy storage because of their high safety, low cost and environmental benignity. The applications AZIBs will inevitably result in a large amount spent AZIBs, which not only induce waste resources, but also pose risks. Therefore, sustainable have to be minimize risk pollution maximize utilization compounds. Herein, this minireview focuses on sustainability from material design recycling techniques. structure degradation mechanism discussed guide materials. Subsequently, component materials is further analysed pre‐evaluate behaviors mentor selection more materials, including active cathodes, Zn anodes, aqueous electrolytes, respectively. According features corresponding green economic approaches proposed realize anodes These advanced technologies endow with efficiency closed‐loop control, ensuring that devices. This review offer insight into potential future directions AZIBs.

Language: Английский

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Synergetic impact of oxygen and vanadium defects endows NH4V4O10 cathode with superior performances for aqueous zinc-ion battery

Energy storage materials, Journal Year: 2023, Volume and Issue: 65, P. 103108 - 103108

Published: Dec. 11, 2023

Language: Английский

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Aqueous all-manganese batteries

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(11), P. 5284 - 5293

Published: Jan. 1, 2023

A SeO 2 -additive electrolyte is developed to achieve a proof-of-concept aqueous all-manganese battery, which shows MnO /Mn 2+ reactions at the cathode and Mn/Mn chemistries anode with theoretical potential of 2.42 V.

Language: Английский

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