科研之友
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摘要
Porous graphene nanosheets (PGNs) containing onion-like nano-holes were simply prepared using copper nitrite as template and phenolic resin as carbon source by graphitization at 2800 degrees C. Based on the investigations of morphology and structure, PGNs were used as anode materials for lithium-ion batteries, and it was found that this PGN electrode exhibits a stable voltage plateau, endurable Li-storage capability and outstanding rate performance of 258 mA h g(-1) at 1 A g(-1) and 105 mA h g(-1) at 10 A g(-1) after 700 cycles, superior to those of other carbon anodes with a low voltage plateau. The reasons are discussed and explained in detail.
