English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A high energy efficiency, low charging voltage cathode is of great significance for the development of non-aqueous lithium-oxygen batteries. Non-stoichiometric manganese dioxide (MnO 2-x ) and chromium trioxide (Cr 2 O 3 ) are known to have good catalytic activities for the discharging and charging processes, respectively. In this work, we prepared a cathode based on Cr 2 O 3  decorated MnO 2-x  nanosheets via a simple anodic electrodeposition-electrostatic adsorption-calcination process. This combined fabrication process allowed the simultaneous introduction of abundant oxygen vacancies and trivalent manganese into the MnO 2-x  nanosheets, with a uniform load of a small amount of Cr 2 O 3  on the surface of the MnO 2-x  nanosheets. Therefore, the Cr 2 O 3 /MnO 2-x  electrode exhibited a high catalytic effect for both discharging and charging, while providing high energy efficiency and low charge voltage. Experimental results show that the as-prepared Cr 2 O 3 /MnO 2-x  cathode could provide a specific capacity of 6,779 mA·h·g −1  with a terminal charge voltage of 3.84 V, and energy efficiency of 78%, at a current density of 200 mA·g −1 . The Cr 2 O 3 /MnO 2-x  electrode also showed good rate capability and cycle stability. All the results suggest that the as-prepared Cr 2 O 3 /MnO 2-x  nanosheet electrode has great prospects in non-aqueous lithium-oxygen batteries.

A Novel Cr2O3/MnO2-x Electrode for Lithium-Oxygen Batteries with Low Charge Voltage and High Energy Efficiency