Tulip-like MoS2 with a single sheet tapered structure anchored on N-doped graphene substrates via C–O–Mo bonds for superior sodium storage. Issue 47 (20th November 2018) - Wang, Tian
Abstract : Tulip-like MoS2 with a single sheet tapered structure anchored on N-doped graphene substrates via C–O–Mo bonds shows excellent capacity retention for sodium storage. Abstract : Tulip-like MoS2 with a tapered structure was assembled using a single-sheet anchored on N-doped graphene substrates (tulip-MoS2 /NG) through an in situ technique with N -methyl-2-pyrrolidinone (NMP) as the "sacrificial agent" to promote C–O–Mo bond formation. As an anode for the Na + battery, tulip-MoS2 /NG electrodes exhibited excellent capacity retention (above 99% after 100 cycles at 0.1 A g −1 ) and long cycling stability (179 mA h g −1 at 1 A g −1 and 151 mA h g −1 at 5 A g −1 after 1000 cycles with a degradation below 110 μAh g −1 cycle −1 ). The excellent electrochemical performance could be attributed to the single-sheet tapered structure that functions as a self-support and promotes the stability of the tulip-MoS2 /NG architecture. Moreover, the C–O–Mo bonds derived from the NMP molecular bridge fixed tulip-like MoS2 on the NG.