Development of sodium-ion batteries (SIBs) and hydrogen evolution reaction (HER) technologies to achieve electrochemical energy storage and conversion has attracted intensive interest. MoS₂ is bifunctionally active towards both SIBs and HER. However, poor electrical conductivity, limited active sites and sluggish ion diffusion kinetics generally give rise to rapid capacity fading, poor cycling stability, and low electrocatalytic activity when used as electrode materials. Herein we designed hierarchical MoS₂/m-C@a-C@Ti₃C₂ nanohybrids as electrode materials for SIBs and HER. The nanohybrids are fabricated by vertically anchoring the few-atomic-layered MoS₂ nanosheets, with alternated intercalation of carbon monolayers, on the both sides of carbon-stabilized Ti₃C₂ substrate. They afford 3D interconnected conductive networks, expanded interlayer distance and strong interfacial coupling, enabling fast charge transfer, abundant active sites, high structural stability and ion diffusion kinetics. Benefited from the synergistic effects, the nanohybrids exhibit ultra-long cycling life of 2000 cycles with high capacities and slow capacity loss per cycle at 2 and 5 A g⁻¹ for Na⁺ storage. They also present high HER activity in both alkaline and acidic solutions (overpotential: 110 and 93 mV (vs. RHE) at 10 mA cm⁻²). These superior properties demonstrate the great promise of this designed strategy for energy storage and conversion.

钠离子电池（SIBs）和析氢反应（HER）技术的发展以实现电化学能量的存储和转换引起了人们的浓厚兴趣。MoS ₂对SIB和HER具有双重功能。然而，当用作电极材料时，差的电导率，有限的活性位点和缓慢的离子扩散动力学通常导致快速的容量衰减，差的循环稳定性和低的电催化活性。在这里，我们设计了分级的MoS ₂ / mC @ aC @ Ti ₃ C ₂纳米杂化物作为SIB和HER的电极材料。通过垂直锚固几个原子层的MoS ₂制备纳米杂化物碳稳定的Ti ₃ C ₂衬底的两面都具有交替排列的碳单层的纳米片。它们提供3D互连的导电网络，扩展的层间距离和强大的界面耦合，可实现快速电荷转移，丰富的活性位点，高结构稳定性和离子扩散动力学。得益于协同作用，纳米杂化物表现出2000个循环的超长循环寿命，具有高容量，并且在Na ⁺储存2和5 A g ^-1时每个循环的容量损失缓慢。在碱性和酸性溶液中，它们在10 mA cm ^-2的碱性和酸性溶液中均表现出较高的HER活性（过电位：110和93 mV（相对于RHE）））。这些优越的性能证明了这种设计的能量存储和转换策略的巨大前景。