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Perchlorate based “Oversaturated Gel Electrolyte” for an aqueous rechargeable hybrid Zn–Li battery
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Chen, Shigang, Lan, Rong, Humphreys, John and Tao, Shanwen (2020) Perchlorate based “Oversaturated Gel Electrolyte” for an aqueous rechargeable hybrid Zn–Li battery. ACS Applied Energy Materials, 3 (3). pp. 2526-2536. doi:10.1021/acsaem.9b02249 ISSN 2574-0962.
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Official URL: http://dx.doi.org/10.1021/acsaem.9b02249
Abstract
In this work, for the first time, an “oversaturated gel electrolyte” (OSGE) with extended electrochemical windows for use as electrolytes in aqueous batteries was investigated. The stability window of the 10 m LiClO4–PVA OSGE is 3.3 V when saturated at 95 °C, which is 0.6 V wider than the 2.7 V for the 6 m (saturated at room temperature) LiClO4–PVA electrolyte. The ionic conductivity of 10 m LiClO4–PVA OSGE is 1.32 × 10–2 S·cm–1 at room temperature. Zn(ClO4)2 is further added to LiClO4–PVA OSGE to introduce Zn2+ ion conduction, which is optimized to 1 m Zn(ClO4)2 + 10 m LiClO4–PVA and applied as the electrolyte in aqueous rechargeable Zn–Li hybrid batteries. The conductivity of Zn2+ ions is estimated as 5.31 × 10–3 S·cm–1 in the 1 m Zn(ClO4)2 + 10 m LiClO4–PVA OSGE, which is high enough for this OSGE to be used as an electrolyte for batteries using Zn2+ ions as the charge carriers. The quasi-solid-state hybrid battery reaches a voltage of 2 V and delivers its highest discharge capacity and energy density as 116.6 mAh·g–1 and 183.3 Wh·kg–1 (calculated on the 5.6 mg active mass of LiMn2O4), respectively, at first cycle, becoming 93.5 mAh·g–1 and 138.0 Wh·kg–1 after 300 cycles with nearly 100% Coulombic efficiency for the first 30 cycles before then becoming about 99% Coulombic efficiency in the following cycles. OSGE is a useful strategy to develop aqueous electrolytes with wide electrochemical stability windows that can bed used for electrochemical devices.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QD Chemistry | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
Library of Congress Subject Headings (LCSH): | Electrolytes -- Conductivity, Lithium ion batteries, Storage batteries, Lithium cells, Zinc ion batteries | ||||||||
Journal or Publication Title: | ACS Applied Energy Materials | ||||||||
Publisher: | American Chemical Society | ||||||||
ISSN: | 2574-0962 | ||||||||
Official Date: | 23 February 2020 | ||||||||
Dates: |
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Volume: | 3 | ||||||||
Number: | 3 | ||||||||
Page Range: | pp. 2526-2536 | ||||||||
DOI: | 10.1021/acsaem.9b02249 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Reuse Statement (publisher, data, author rights): | “This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Energy Materials copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html].” | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Copyright Holders: | © 2020 American Chemical Society | ||||||||
Date of first compliant deposit: | 19 March 2020 | ||||||||
Date of first compliant Open Access: | 21 February 2021 | ||||||||
RIOXX Funder/Project Grant: |
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