Electron-deficient anthraquinone derivatives as cathodic material for lithium ion batteries

• Published in: Journal of power sources Vol. 328; pp. 228 - 234
• Main Authors: Takeda, Takashi, Taniki, Ryosuke, Masuda, Asuna, Honma, Itaru, Akutagawa, Tomoyuki
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2016
• Subjects: Anthraquinone; Electron acceptor; Lithium coordination; Lithium-ion batteries; Structure-properties relationship; Lithium-ion batteries; Structure-properties relationship; Lithium coordination; Anthraquinone; Electron acceptor
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2016.08.022

We studied the electronic and structural properties of electron-deficient anthraquinone (AQ) derivatives, Me4N4AQ and TCNAQ, and investigated their charge-discharge properties in lithium ion batteries along with those of AQ. Cyclic voltammogram, X-ray structure analysis and theoretical calculations revealed that these three acceptors have different features, such as different electron-accepting properties with different reduction processes and lithium coordination abilities, and different packing arrangements with different intermolecular interactions. These differences greatly affect the charge-discharge properties of lithium ion batteries that use these compounds as cathode materials. Among these compounds, Me4N4AQ showed a high charge/discharge voltage (2.9–2.5 V) with high cyclability (>65% of the theoretical capacity after 30 cycles; no decrease after 15 cycles). These results provide insight into more in-depth design principles for lithium ion batteries using AQ derivatives as cathodic materials. [Display omitted] •We studied the electronic/structural properties of electron-deficient AQ derivatives.•Design principles for Li-ion batteries using AQ derivatives as cathode were obtained.•Differences of Li coordination and structure of AQ greatly affect battery properties.•Me4N4AQ showed a high charge/discharge voltage with high cyclability.