MoSe2 Complex with N and B Dual-Doped 3D Carbon Nanofibers for Sodium Batteries

The sodium battery is one of the best energy storage technologies due to its abundant resource reserves and excellent energy storage ability. As a two-dimensional layered transition metal, molybdenum selenide (MoSe2) has large interlayer spacing and a high theoretical capacity (470 mAh∙g−1). Its structure is suitable for the negative electrode of sodium-ion batteries, with a large ionic radius and slow ion diffusion kinetics. However, it is difficult for the rate capability and cycling performance of MoSe2to meet practical needs due to a weak intrinsic electron transport ability and volume expansion during sodium absorption. The hydrothermal synthesis method was used to synthesize the MoSe2complex based on boron and nitrogen dual-doped 3D carbon fibers obtained from bacterial cellulose membranes (MoSe2/N&B-BCM) for sodium batteries. Additionally, electrochemical analysis and experimental characterization were performed. In summary, the experimental analysis shows that MoSe2/N&B-BCM has excellent conductivity, structural integrity, cyclability (328 mAh∙g−1after 100 cycles at a 0.5 c constant rate), and rate stability.