Tuning the electrochemical performances of anthraquinone organic cathode materials for Li-ion batteries through the sulfonic sodium functional group

The effects on electrochemical performance of C14H8O2 organic cathode materials with and without SO3Na- functional groups for lithium ion batteries were investigated. The Na2C14H6O8S2 with two SO3Na- shows the best cycle performance and highest lithium storage voltage, while an outstanding rate performance is also achieved after combination with graphene paper.