Graphene oxide linked with N, N′-diamino-1,4,5,8-naphthalenetetracarboxylic bisimide as a stable cathode material for lithium-ion batteries

Organic carbonyl compounds are regarded as a promising cathode for green, flexible, and sustainable energy storage systems. Currently, developing an effective route for overcoming the dissolution problem of organic carbonyl compounds remains a challenge. Herein, DNTCB-functionalized graphene oxide (DNTCB-GO) nanosheets were prepared by using the covalent bonding between DNTCB and GO (DNTCB = N,N′-diamino-1,4,5,8-naphthalenetetracarboxylic bisimide, GO = grapheme oxide). Within a voltage window of 1.5–4.5 V, as-obtained DNTCB-GO displays excellent cyclic stability, better rate capability, and higher specific capacity as a cathode material of lithium-ion batteries, remaining a specific capacity of 132 mA h g−1 at 50 mA g−1 after 50 cycles. Our work shows that the covalent linking of polycarbonyl compound and GO is an effective method to obtain cathode materials of lithium-ion batteries with high-performance.