In:
Small, Wiley, Vol. 19, No. 14 ( 2023-04)
Abstract:
Herein, for the first time, a pre‐intercalated non‐metal ion (NH 4 + ) with rich oxygen vacancies stabilized tunnel WO 3 is proposed as a new intercalation anode to construct Zn‐metal‐free rocking‐chair ZIBs. With the ethylene glycol additive in the aqueous electrolyte, the Zn 2+ solvation structure can be regulated and the side reaction of hydrogen evolution can also be suppressed. Owing to the integrated synergetic modification, a high‐rate and ultra‐stable aqueous Zn‐(NH 4 ) x WO 3 battery can be constructed, which exhibits an improved specific capacity (153 mAh g −1 at 0.1 A g −1 ), excellent rate performance (when the current density increases to 3 A g −1 , the specific capacitance is still 86 mAh g −1 ), and a high cycle stability with 100% capacity retention after 2,200 cycles under 5 A g −1 . Ex situ X‐ray diffraction and XPS reveal the reversible insertion/extraction of Zn 2+ in (NH 4 ) x WO 3 . The assembled (NH 4 ) x WO 3 //MnO 2 rocking‐chair ZIBs delivers excellent capacity of 82 mAh g −1 at 0.1 A g −1 , impressive cyclic stability. Additionally, the flexible (NH 4 ) x WO 3 //MnO 2 ZIBs can power the electrochromic device‐based PANI/WO 3 with high color contrast and fast response time. This study provides new insight for developing high‐performance rechargeable aqueous ZIBs.
Type of Medium:
Online Resource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.202206701
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2168935-0
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