The aqueous zinc-ion hybrid supercapacitor (ZIHC) has become an emerging energy storage device due to its safety and low cost. Herein, a new pizza-like heterostructure of Ti₃C₂T_x intercalated by N-doped-carbon-wrapped Bi₂S₃ is fabricated by in-situ growth. The specific capacitance of Ti₃C₂T_x/Bi₂S₃@N-C electrode is as high as 653 F g⁻¹ at 1 A g⁻¹, which is significantly higher than other binary composites or similar MXene-based materials in literature. The ZIHC are assembled with Ti₃C₂T_x/Bi₂S₃@N-C and Zn foil as electrodes, possessing high specific capacitance of 150.33 F g⁻¹ at 1 A g⁻¹, and a maximum energy density of 46.98 W h kg⁻¹ at a power density of 750 W kg⁻¹. The excellent performance of Ti₃C₂T_x/Bi₂S₃@N-C is mainly attributed to the synergistic effect of the three components: (a) highly conductive Ti₃C₂T_x as the substrate shortens the electron transport path; (b) the in-situ growth of Bi₂S₃ on Ti₃C₂T_x layers makes full use of Bi₂S₃ active sites; (c) the innovative introduction of dopamine can not only make Bi(NO)₃ evenly dispersed, but also form the “cross-bridge” N-C film, which further improves the binding between Ti₃C₂T_x substrate and Bi₂S₃ and reduces the internal resistance greatly. This study proposes a new in-situ growth strategy for a ternary heterostructure, which may offer a new avenue for the development of high-performance electrode materials.

水性锌离子混合超级电容器（ZIHC）由于其安全性和低成本已成为一种新兴的储能装置。在本文中，通过原位生长制备了一种新型的比萨饼状的 Ti ₃ C ₂ T _x插入了 N 掺杂碳包裹的 Bi ₂ S ₃异质结构。Ti ₃ C ₂ T _x /Bi ₂ S ₃ @NC 电极的比电容在 1 A g ^{-1 时}高达 653 F g ^-1，明显高于文献中的其他二元复合材料或类似的基于 MXene 的材料. ZIHC 由 Ti ₃ C ₂组装而成T _x /Bi ₂ S ₃ @NC 和 Zn 箔作为电极，在 1 A g ^{-1 时}具有 150.33 F g ^{-1 的}高比电容，在 750 的功率密度下具有 46.98 W h kg ^-1的最大能量密度W kg ^-1。Ti ₃ C ₂ T _x /Bi ₂ S ₃ @NC的优异性能主要归功于三组分的协同作用：(a) 高导电性的 Ti ₃ C ₂ T _x作为基材缩短了电子传输路径；(b) Bi ₂ S的原位生长₃在Ti ₃ C ₂ T _x层上充分利用Bi ₂ S ₃活性位点；(c) 多巴胺的创新引入不仅可以使Bi(NO) ₃均匀分散，还可以形成“跨桥”NC膜，进一步提高了Ti ₃ C ₂ T _x衬底与Bi ₂ S ₃之间的结合并大大降低内阻。该研究提出了一种新的三元异质结构原位生长策略，可能为高性能电极材料的开发提供新的途径。