Sacrificial Catalyst of Carbothermal-Shock-Synthesized 1T-MoS<sub>2</sub> Layers for Ultralong-Lifespan Seawater Battery.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 36574277.
- Also identified by DOI 10.1021/acs.nanolett.2c04698.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
A Pt-nanoparticle-decorated 1T-MoS<sub>2</sub> layer is designed as a sacrificial electrocatalyst by carbothermal shock (CTS) treatment to improve the energy efficiency and lifespan of seawater batteries. The phase transition of MoS<sub>2</sub> crystals from 2H to metallic 1T─induced by the simple but potent CTS treatment─improves the oxygen-reduction-reaction (ORR) activity in seawater catholyte. In particular, the MoS<sub>2</sub>-based sacrificial catalyst effectively decreases the overpotential during charging via edge oxidation of MoS<sub>2</sub>, enhancing the cycling stability of the seawater battery. Furthermore, Pt nanoparticles are deposited onto CTS-MoS<sub>2</sub> via an additional CTS treatment. The resulting specimen exhibits a significantly low charge/discharge potential gap of Δ0.39 V, high power density of 6.56 mW cm<sup>-2</sup>, and remarkable cycling stability up to ∼200 cycles (∼800 h). Thus, the novel strategy reported herein for the preparation of Pt-decorated 1T-MoS<sub>2</sub> by CTS treatment could facilitate the development of efficient bifunctional electrocatalysts for fabricating seawater batteries with long service life.