Toward Flexible Zinc-Ion Hybrid Capacitors with Superhigh Energy Density and Ultralong Cycling Life: The Pivotal Role of ZnCl₂ Salt-Based Electrolytes

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dc.contributor.authorWang, C.
dc.contributor.authorPei, Z.
dc.contributor.authorMeng, Q.
dc.contributor.authorZhang, C.
dc.contributor.authorSui, X.
dc.contributor.authorYuan, Z.
dc.contributor.authorWang, S.
dc.contributor.authorChen, Y.
dc.date.issued2021
dc.description.abstractZinc ion hybrid capacitors (ZIHCs) are promising energy storage devices for emerging flexible electronics, but they still suffer from trade-off in energy density and cycling life. Herein, we show that such a dilemma can be well-addressed by deploying ZnCl2 based electrolytes. Combining experimental studies and density functional theory (DFT) calculations, for the first time, we demonstrate an intriguing chloride ion (Cl@ ) facilitated desolvation mechanism in hydrated [ZnCl]+ - (H2O)n@1 (with n = 1–6) clusters. Based on this mechanism, a water-in-salt type hydrogel electrolyte filled with ZnCl2 was developed to concurrently improve the energy storage capacity of porous carbon materials and the reversibility of Zn metal electrode. The resulting ZIHCs deliver a battery-level energy density up to 217 Whkg@1 at a power density of 450 W kg @1 , an unprecedented cycling life of 100000 cycles, together with excellent low-temperature adaptability and mechanical flexibility.
dc.description.statementofresponsibilityCheng Wang, Zengxia Pei, Qiangqiang Meng, Chunmei Zhang, Xiao Sui, Ziwen Yuan, Sijie Wang, and Yuan Chen
dc.identifier.citationAngewandte Chemie International Edition, 2021; 60(2):990-997
dc.identifier.doi10.1002/anie.202012030
dc.identifier.issn1433-7851
dc.identifier.issn1521-3773
dc.identifier.orcidWang, C. [0000-0003-2837-877X]
dc.identifier.urihttps://hdl.handle.net/2440/136433
dc.language.isoen
dc.publisherWiley
dc.relation.granthttp://purl.org/au-research/grants/arc/FT160100107
dc.relation.granthttp://purl.org/au-research/grants/arc/DP180102210
dc.relation.granthttp://purl.org/au-research/grants/arc/DE200101669
dc.rights© 2020 Wiley-VCH GmbH
dc.source.urihttps://doi.org/10.1002/anie.202012030
dc.subjectzinc ion hybrid capacitor
dc.subjectdesolvation
dc.subjecthydrogel electrolyte
dc.subjectenergy density
dc.subjectflexible energy storage
dc.titleToward Flexible Zinc-Ion Hybrid Capacitors with Superhigh Energy Density and Ultralong Cycling Life: The Pivotal Role of ZnCl₂ Salt-Based Electrolytes
dc.title.alternativeToward Flexible Zinc-Ion Hybrid Capacitors with Superhigh Energy Density and Ultralong Cycling Life: The Pivotal Role of ZnCl2 Salt-Based Electrolytes
dc.typeJournal article
pubs.publication-statusPublished

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