Flower‐like nitrogen‐Co‐doped MoS₂@rgo composites with excellent stability for supercapacitors

Min Li (1) , Ahmed Addad (2) , Yuan Zhang (3) , Alexandre Barras (1, 4) , Pascal Roussel (5) , Mohammed Amin , Sabine Szunerits (1, 4) , Rabah Boukherroub (1, 4)

1 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
2 UMET - Unité Matériaux et Transformations - UMR 8207
3 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
4 NBI - IEMN - NanoBioInterfaces - IEMN
5 UCCS - Unité de Catalyse et Chimie du Solide - UMR 8181

Nitrogen-co-doped MoS₂@rGO composites (named hereafter N-MoS₂@N-RGO) are prepared by the hydrothermal method using dicyandiamide or hydrazine monohydrate as the nitrogen source. N-MoS₂@rGO is obtained by the hydrothermal reaction of thioacetamide, ammonium molybdate and GO precursors in the presence of dicyandiamide, while N-MoS2@N-RGO is synthesized using the same precursors in the presence of hydrazine monohydrate as the nitrogen source. On the one hand, N-MoS2@RGO displays excellent performance and good capacitance value of 335 F/g acquired at 0.5A/g and improved stability (∼94% of the original capacitance is preserved after 5000 cycles). On the other hand, compared with N-MoS2@RGO, N-MoS₂@N-RGO possesses a slightly higher capacitance of 340 F/g recorded at 0.5A/g and better cycling stability (∼98% of its original value after 5000 cycles). Taken together, the results of this investigation clearly indicate that the fabricated composites have application prospect in energy storage devices.

Domaines: Sciences de l'ingénieur [physics]

Min Li, Ahmed Addad, Yuan Zhang, Alexandre Barras, Pascal Roussel, et al.. Flower‐like nitrogen‐Co‐doped MoS₂@rgo composites with excellent stability for supercapacitors. ChemElectroChem, 2021, 8 (15), pp.2903-2911. ⟨10.1002/celc.202100401⟩. ⟨hal-03361238⟩