Graphene oxide linked with N, N′-diamino-1,4,5,8-naphthalenetetracarboxylic bisimide as a stable cathode material for lithium-ion batteries
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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.
KeywordsGraphene oxide Lithium-ion batteries Cathode material Diamino-naphthalenetetracarboxylic bisimide
We thank the financial support from the National Natural Science Foundation of China (No. 20971060), the Natural Science Research Key Project of Jiangsu Colleges and Universities (No. 16KJA430005), Jiangsu Province Key Laboratory of Fine Petrochemical Engineering and the Natural Science Foundation of State Key Laboratory of Coordination Chemistry.
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