Heterostructured NiS<sub>2</sub>/ZnIn<sub>2</sub>S<sub>4</sub> Realizing Toroid-like Li<sub>2</sub>O<sub>2</sub> Deposition in Lithium-Oxygen Batteries with Low-Donor-Number Solvents.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 32101395.
- Also identified by DOI 10.1021/acsnano.9b09646.
- 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
The aprotic lithium-oxygen (Li-O<sub>2</sub>) battery has triggered tremendous efforts for advanced energy storage due to the high energy density. However, realizing toroid-like Li<sub>2</sub>O<sub>2</sub> deposition in low-donor-number (DN) solvents is still the intractable obstruction. Herein, a heterostructured NiS<sub>2</sub>/ZnIn<sub>2</sub>S<sub>4</sub> is elaborately developed and investigated as a promising catalyst to regulate the Li<sub>2</sub>O<sub>2</sub> deposition in low-DN solvents. The as-developed NiS<sub>2</sub>/ZnIn<sub>2</sub>S<sub>4</sub> promotes interfacial electron transfer, regulates the adsorption energy of the reaction intermediates, and accelerates O-O bond cleavage, which are convincingly evidenced experimentally and theoretically. As a result, the toroid-like Li<sub>2</sub>O<sub>2</sub> product is achieved in a Li-O<sub>2</sub> battery with low-DN solvents <i>via</i> the solvation-mediated pathway, which demonstrates superb cyclability over 490 cycles and a high output capacity of 3682 mA h g<sup>-1</sup>. The interface engineering of heterostructure catalysts offers more possibilities for the realization of toroid-like Li<sub>2</sub>O<sub>2</sub> in low-DN solvents, holding great promise in achieving practical applications of Li-O<sub>2</sub> batteries as well as enlightening the material design in catalytic systems.