Free, publicly-accessible full text available January 18, 2025
Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher.
Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?
Some links on this page may take you to non-federal websites. Their policies may differ from this site.
-
-
more » « less
Abstract This study presents a new material, “H
x CrS2” (denotes approximate composition) formed by proton‐exchange of NaCrS2which has a measured capacity of 728 mAh g−1with significant improvements to capacity retention, sustaining over 700 mAh g−1during cycling experiments. This is the highest reported capacity for a transition metal sulfide electrode and outperforms the most promising proposed sodium anodes to date. Hx CrS2exhibits a biphasic structure featuring alternating crystalline and amorphous lamella on the scale of a few nanometers. This unique structural motif enables reversible access to Cr redox in the material resulting in higher capacities than seen in the parent structure which features only S redox. Pretreatment by proton‐exchange offers a route to materials such as Hx CrS2which provide fast diffusion and high capacities for sodium‐ion batteries.
