Abstract
Organic redox compounds are promising candidates for lithium ion batteries owing to the elemental abundance and structural diversity. However, the low redox potential and chemical bond cleavage/recombination during lithiation/delithiation have significantly limited their practical application. We demonstrate here the manipulation of conjugation to stabilize N redox-active centers in a p-type, two-electron-transfer oligomer of N,N’-diphenyl-5,10-dihydrophenazine as a high-voltage organic battery cathode material, which exhibits high redox potentials of 4.1 and 3.3 V (vs. Li+/Li), good stability, and a galvanometric energy density of ca. 530 Wh kg–1. The redox active electron localized on the dihydrophenazine unit in this oligomer are believed to contribute to the good electrochemical performances.
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