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Article: High-Rate and Long-Cycle Stability with a Dendrite-Free Zinc Anode in an Aqueous Zn-Ion Battery Using Concentrated Electrolytes

TitleHigh-Rate and Long-Cycle Stability with a Dendrite-Free Zinc Anode in an Aqueous Zn-Ion Battery Using Concentrated Electrolytes
Authors
Keywordsaqueous electrolyte
copper foil
dendrite
reversibility
stability
zinc ion battery
Issue Date2020
Citation
ACS Applied Energy Materials, 2020, v. 3, n. 5, p. 4499-4508 How to Cite?
AbstractRecently, metallic zinc (Zn) is becoming a promising ideal anode material for rechargeable aqueous batteries by providing high theoretical capacity (820 mA h/g) with divalent reaction, environmental friendliness, earthy abundance, low cost, low toxicity, higher water compatibility, and low electrochemical potential (-0.762 V vs SHE). However, intensive growth of zinc dendrites while plating/stripping lowers its coulombic efficiency and shortens the cycle life of the rechargeable devices. Here, we report a concentrated aqueous electrolyte (4.2 M ZnSO4 + 0.1 M MnSO4) with improved cycling stability of zinc metal anode achieving an average coulombic efficiency (ACE) ∼99.21% cycling for more than 1000 h at 0.2 mA/cm2 current density using a Zn||Cu cell. However, a frequently used diluted electrolyte (2 M ZnSO4 + 0.1 M MnSO4) only produces ACE ≈ 97.54% with a relatively short life cycle. The developed concentrated electrolyte with strongly aggregated ion pairs shows the synergetic effects of the enhanced solvation/desolvation process, electrostatic shielding, and Le Chatelier's principle. Consequently, the additives simultaneously suppress Zn dendrites and dissolution of Mn2+ ions from the MnO2 cathode. A highly stable and reversible Zn||MnO2 cell retaining about 88.37% retention capacity was obtained after cycling for more than 1200 cycles at 938 mA/g current density.
Persistent Identifierhttp://hdl.handle.net/10722/334669
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorOlbasa, Bizualem Wakuma-
dc.contributor.authorFenta, Fekadu Wubatu-
dc.contributor.authorChiu, Shuo Feng-
dc.contributor.authorTsai, Meng Che-
dc.contributor.authorHuang, Chen Jui-
dc.contributor.authorJote, Bikila Alemu-
dc.contributor.authorBeyene, Tamene Tadesse-
dc.contributor.authorLiao, Yen Fa-
dc.contributor.authorWang, Chia Hsin-
dc.contributor.authorSu, Wei Nien-
dc.contributor.authorDai, Hongjie-
dc.contributor.authorHwang, Bing Joe-
dc.date.accessioned2023-10-20T06:49:47Z-
dc.date.available2023-10-20T06:49:47Z-
dc.date.issued2020-
dc.identifier.citationACS Applied Energy Materials, 2020, v. 3, n. 5, p. 4499-4508-
dc.identifier.urihttp://hdl.handle.net/10722/334669-
dc.description.abstractRecently, metallic zinc (Zn) is becoming a promising ideal anode material for rechargeable aqueous batteries by providing high theoretical capacity (820 mA h/g) with divalent reaction, environmental friendliness, earthy abundance, low cost, low toxicity, higher water compatibility, and low electrochemical potential (-0.762 V vs SHE). However, intensive growth of zinc dendrites while plating/stripping lowers its coulombic efficiency and shortens the cycle life of the rechargeable devices. Here, we report a concentrated aqueous electrolyte (4.2 M ZnSO4 + 0.1 M MnSO4) with improved cycling stability of zinc metal anode achieving an average coulombic efficiency (ACE) ∼99.21% cycling for more than 1000 h at 0.2 mA/cm2 current density using a Zn||Cu cell. However, a frequently used diluted electrolyte (2 M ZnSO4 + 0.1 M MnSO4) only produces ACE ≈ 97.54% with a relatively short life cycle. The developed concentrated electrolyte with strongly aggregated ion pairs shows the synergetic effects of the enhanced solvation/desolvation process, electrostatic shielding, and Le Chatelier's principle. Consequently, the additives simultaneously suppress Zn dendrites and dissolution of Mn2+ ions from the MnO2 cathode. A highly stable and reversible Zn||MnO2 cell retaining about 88.37% retention capacity was obtained after cycling for more than 1200 cycles at 938 mA/g current density.-
dc.languageeng-
dc.relation.ispartofACS Applied Energy Materials-
dc.subjectaqueous electrolyte-
dc.subjectcopper foil-
dc.subjectdendrite-
dc.subjectreversibility-
dc.subjectstability-
dc.subjectzinc ion battery-
dc.titleHigh-Rate and Long-Cycle Stability with a Dendrite-Free Zinc Anode in an Aqueous Zn-Ion Battery Using Concentrated Electrolytes-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acsaem.0c00183-
dc.identifier.scopuseid_2-s2.0-85087592564-
dc.identifier.volume3-
dc.identifier.issue5-
dc.identifier.spage4499-
dc.identifier.epage4508-
dc.identifier.eissn2574-0962-
dc.identifier.isiWOS:000537656400051-

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