High-Performance Bipolar Small-Molecule Organic Cathode for Wide-Temperature-Range Aqueous Zinc-Ion Batteries
Anhui University · University of Wollongong · +1 more institution
Abstract
Organic small-molecules with redox activity are promising cathode candidates for aqueous zinc-ion batteries (AZIBs) due to their low cost, high safety and high theoretical capacity. However, their severe dissolution leads to unsatisfactory electrochemical performance. Here, a dihydro-octaaza-pentacene (DOP) compound is synthesized as a cathode for AZIBs by extending its N heterocyclic molecular structure. The extended N heterocyclic structure provides dual active sites of n-type (C═N) and p-type (−NH−) redox reactions while reducing dissolution through enhanced π-conjugation. Hence, the Zn//DOP battery demonstrates improved performance, e.g., an enhanced capacity of 360 mAh g–1 at 0.05 A g–1. Even under…
Citation impact
- FWCI
- 28.47
- Percentile
- 100%
- References
- 59
Authors
9Topics & keywords
- Materials science
- Aqueous solution
- Cathode
- Atmospheric temperature range
- Organic molecules
- Zinc
- Small molecule
- Ion