Elucidating Consequences of Selenium Crystallinity on Its Electrochemical Reduction in Aluminum-Selenium Batteries.

ABSTRACT: Selenium (Se) is an attractive positive electrode material for rechargeable aluminum (Al) batteries due to its high theoretical capacity of 2037 mA h g^-1 and its higher electronic conductivity compared to sulfur. Selenium can undergo a series of electrochemical reactions between Se(-II) and Se(IV), resulting in a six-electron capacity per Se atom. However, existing Al-Se battery literature is inconsistent regarding the different electrochemical reactions possible, while the conditions enabling the electrochemical reduction of Se to Al₂Se₃ are not well understood. Here, we demonstrate that this electrochemical reduction is achievable using amorphous selenium but is suppressed for crystalline selenium. We further show that the electrochemical oxidation of Se

SUBMITTER: Gordon LW 

PROVIDER: S-EPMC11220787 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature