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- Title
H<sub>2</sub>O Activity Adjustment by Hydrogen Bonding Enables High‐Performance Zn‐Organic Battery.
- Authors
Zhou, Kang; Wang, Nan; Qiu, Xuan; Xie, Haijiao; Wei, Peng; Dong, Xiaoli; Wang, Yonggang
- Abstract
The advantages of low cost and high safety of zinc (Zn) metal have attracted much attention on its application in batteries, but H2O‐induced issues of hydrogen evolution reaction (HER), Zn corrosion, and Zn dendrites formation limit the application. Here, a strategy of adjusting H2O activity was provided by adding glycerol (GL) and acetonitrile (AN) into aqueous electrolyte to form hydrogen bonds between organic solvents and H2O, which alleviated the Zn corrosion. Furthermore, molecular dynamics (MD) simulation indicated that GL could exclude H2O from the Zn2+ solvation shell, thus preventing undesired HER and Zn dendrites formation. Therefore, the corresponding Zn//Zn symmetrical cell showed a ultralong lifespan (1300 h). Then, a Zn‐organic battery with 3,7‐dimorpholino‐phenothiazin‐5‐ium iodide (FD28) cathode was fabricated by using such electrolyte. Interestingly, the reduced H2O activity also ensured the stable operation of organic cathode, and thus the full cell showed superior cycle stability for over 9000 cycles (≈1100 h), which is superior to previous reports. Moreover, such electrolyte owns novel properties of nonflammability, great weatherability, and low freezing point, thus boosting the practicality of the battery.
- Subjects
HYDROGEN bonding; AQUEOUS electrolytes; HYDROGEN evolution reactions; FREEZING points; LITHIUM cells; ELECTRIC batteries; MOLECULAR dynamics
- Publication
ChemSusChem, 2022, Vol 15, Issue 24, p1
- ISSN
1864-5631
- Publication type
Article
- DOI
10.1002/cssc.202201739