Exploring Metastable Phases During Lithiation of Organic Battery Electrode Materials
Artikel i vetenskaplig tidskrift, 2022

In this work, the Li-ion insertion mechanism in organic electrode materials is investigated through the lens of atomic-scale models based on first-principles theory. Starting with a structural analysis, the interplay of density functional theory with evolutionary and potential-mapping algorithms is used to resolve the crystal structure of the different (de)lithiated phases. These methods elucidate different lithiation reaction pathways and help to explore the formation of metastable phases and predict one- or multi-electron reactions, which are still poorly understood for organic intercalation electrodes. The cathode material dilithium 2,5-oxyterephthalate (operating at 2.6 V vs. Li/Li+) is investigated in depth as a case study, owing to its rich redox chemistry. When compared with recent experimental results, it is demonstrated that metastable phases with peculiar ring-ring molecular interactions are more likely to be controlling the redox reactions thermodynamics and consequently the battery voltage.

evolutionary algorithms

electrode materials

density functional calculations

lithium

organic batteries

Författare

Rodrigo P. Carvalho

Uppsala universitet

Mirna Alhanash

Chalmers, Fysik, Materialfysik

Uppsala universitet

Cleber F.N. Marchiori

Karlstads universitet

D. Brandell

Uppsala universitet

C. Moyses Araujo

Karlstads universitet

Uppsala universitet

ChemSusChem

1864-5631 (ISSN) 1864-564X (eISSN)

Vol. In Press

Ämneskategorier

Oorganisk kemi

Materialkemi

Teoretisk kemi

DOI

10.1002/cssc.202200354

Mer information

Senast uppdaterat

2022-05-09