Abstract
Aqueous zinc-sulfur (Zn-S) batteries are regarded as excellent candidates for energy storage applications due to their low cost, non-toxicity, and high theoretical energy density. However, the low utilization of the traditional thick foil-type Zn anode would severely restrict the overall energy density of Zn-S batteries. Herein, a mechanically and chemically stable powder-Zn/indium (pZn/In) anode with finite Zn loading was designed and constructed for enhancing the cycle stability of aqueous Zn-S batteries. Notably, the bifunctional In protective layer can inhibit the corrosion rate of highly active pZn and homogenize the Zn2+ flux during Zn plating/stripping. As a result, the obtained pZn/In anode exhibits a greatly improved cyclability of over 285 h even under a much harsh test condition (10 mA cm−2, 2.5 mA h cm−2, Zn utilization rate: ∼38.5%). Furthermore, when assembled with an S-based cathode at a negative/positive (N/P) capacity ratio ∼2, the full cell delivers a high initial specific capacity of ∼803 mA h g−1 and operates stably for over 300 cycles at 2C with a low capacity fading rate of ∼0.17% per cycle.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2436-2444 |
| Number of pages | 9 |
| Journal | Materials Horizons |
| Volume | 10 |
| Issue number | 7 |
| DOIs | |
| State | Published - Mar 27 2023 |
| Externally published | Yes |
ASJC Scopus subject areas
- Mechanics of Materials
- Process Chemistry and Technology
- General Materials Science
- Electrical and Electronic Engineering