Two-dimensional niobium carbide (Nb₂C), a member of the emerging MXene family, has recently garnered attention in various fields, including materials science, physics, chemistry, and nanotechnology. In this review, we highlight the material properties, synthesis strategies, and applications of Nb₂C in energy storage devices, catalysis, and photovoltaic devices. We first introduce the synthesis methods, structural characteristics, and notable chemical and physical properties. Then, we discuss the influence of morphology, functional groups, and electrolytes on electrochemical energy storage devices, and present and compare advancements of various Nb₂C-based batteries and supercapacitors. Next, we summarize the current progress of Nb₂C MXene in electrocatalytic and photocatalytic hydrogen evolution reactions. Finally, we present the implementation of Nb₂C MXene as a charge transport layer in organic and perovskite solar cells. These examples encompass diverse architectures, interface configurations, and functionalization approaches, showing a promising future for Nb₂C as a rising energy material. They also inspire researchers to come up with innovative material designs to improve device performance and extend possible applications of Nb₂C MXene.

二维碳化铌 (Nb ₂ C) 是新兴的 MXene 家族的一员，最近引起了材料科学、物理、化学和纳米技术等各个领域的关注。_{在这篇综述中，我们重点介绍了 Nb 2} C的材料特性、合成策略以及在储能器件、催化和光伏器件中的应用。我们首先介绍合成方法、结构特征和显着的化学和物理性质。然后，我们讨论了形貌、官能团和电解质对电化学储能设备的影响，并介绍和比较了各种基于Nb _{2 C 的电池和超级电容器的进展。接下来，我们总结一下目前Nb 2}的进展C MXene 在电催化和光催化析氢反应中的作用。_{最后，我们介绍了 Nb 2} C MXene 在有机和钙钛矿太阳能电池中作为电荷传输层的实现。_{这些示例包含不同的架构、界面配置和功能化方法，展示了 Nb 2} C 作为新兴能源材料的广阔前景。它们还激发研究人员提出创新材料设计，以提高设备性能并扩展 Nb ₂ C MXene 的可能应用。