Perylenetetracarboxylic Diimide as Diffusion-Less Electrode Material for High-Rate Organic Na-Ion Batteries.

ABSTRACT: In this work 3,4,9,10-perylenetetracarboxylic diimide (PTCDI) is investigated as electrode material for organic Na-ion batteries. Since PTCDI is a widely used industrial pigment, it may turn out to be a cost-effective, abundant, and environmentally benign cathode material for secondary Na-ion batteries. Among other carbonyl pigments, PTCDI is especially interesting due to its high Na-storage capacity in combination with remarkable high rate capabilities. The detailed analysis of cyclic voltammetry measurements reveals a diffusion-less mechanism, suggesting that Na-ion storage in the PTCDI film allows for exceptionally fast charging/discharging rates. This finding is further corroborated by galvanostatic sodiation measurements at high rates of 17?C (2.3?A?g^-1 ), showing that 57?% of the theoretically possible capacity of PTCDI, or 78?mAh?g^-1 , are attained in only 3.5?min charging time.

SUBMITTER: Liebl S 

PROVIDER: S-EPMC7839514 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature