Graphene oxide linked with N, N′-diamino-1,4,5,8-naphthalenetetracarboxylic bisimide as a stable cathode material for lithium-ion batteries
Ionics(2019)
摘要
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.
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关键词
Graphene oxide, Lithium-ion batteries, Cathode material, Diamino-naphthalenetetracarboxylic bisimide
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