4.8 Article

MnCo2S4-CoS1.097 Heterostructure Nanotubes as High Efficiency Cathode Catalysts for Stable and Long-Life Lithium-Oxygen Batteries Under High Current Conditions

Journal

ADVANCED SCIENCE
Volume 8, Issue 22, Pages -

Publisher

WILEY
DOI: 10.1002/advs.202103302

Keywords

cathode catalysts; electrocatalysis; heterostructure; Li-O-2 batteries; MnCo2S4-CoS1 097

Funding

  1. China Postdoctoral Science Foundation [2020M672054]
  2. Natural Science Foundation of Shandong Province [ZR2020QB122]
  3. Young Scholars Program of Shandong University [2019WLJH21]

Ask authors/readers for more resources

Constructing heterostructures is an effective method to improve the electrical conductivity and electrocatalytic properties of metal sulfide catalysts. In this study, MnCo2S4-CoS1.097 nanotubes were successfully prepared and demonstrated high specific capacities and good cycling stability under high current conditions. The superior electrochemical performance is attributed to fast ion and electron transmission, multiple active sites, and the nanotube architecture with large specific surface area.
Constructing the heterostructures is considered to be one of the most effective methods to improve the poor electrical conductivity and insufficient electrocatalytic properties of metal sulfide catalysts. In this work, MnCo2S4-CoS1.097 nanotubes are successfully prepared via a reflux- hydrothermal process. This novel cathode catalyst delivers high discharge/charge specific capacities of 21 765/21 746 mAh g(-1) at 200 mA g(-1) and good rate capability. In addition, a favorable cycling stability with a fixed specific capacity of 1000 mAh g(-1) at high current density of 1000 mA g(-1) (167 cycles) and 2000 mA g(-1) (57 cycles) are delivered. It is proposed that fast transmission of ions and electrons accelerated by the built-in electric field, multiple active sites from the heterostructure, and nanotube architecture with large specific surface area are responsible for the superior electrochemical performance. To some extent, the rational design of this heterostructured metal sulfide catalyst provides guidance for the development of the stable and efficient cathode catalysts for Li-O-2 batteries that can be employed under high current conditions.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.8
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available