Biological templates have unique structures, which are promising as a carbon source for electrode materials in energy storage devices. Yeast, a type of single-celled fungus widely available in nature possesses a unique elliptical structure and could be an ideal candidate for excellent performance supercapacitor electrode materials. In this work, we used a self-template technique to synthesize hollow carbon spheres using yeast cells as the carbon source (YC). NiCo₂S₄ nanosheets were further grown on the YC surface by hydrothermal synthesis. The functional groups on the YC facilitate the adsorption of the metal ions, which enables strong anchoring of the NiCo₂S₄ nanosheets. The YC/NiCo₂S₄ composite exhibits great electrochemical performance, showing a specific capacitance of 747 F g^-1 at 1 A g^-1. Furthermore, a device composed of an YC/NiCo₂S₄ positive electrode and an activated carbon negative electrode shows a maximum energy density of 43.7 Wh kg^-1 at 400 W kg^-1. Considering the low environmental impact of preparing the yeast-derived material and the outstanding performance of YC/NiCo₂S₄, the composite is a promising candidate for use in energy storage devices.

生物模板具有独特的结构，有望成为能量存储设备中电极材料的碳源。酵母是一种在自然界中广泛使用的单细胞真菌，具有独特的椭圆结构，可以成为性能卓越的超级电容器电极材料的理想选择。在这项工作中，我们使用自我模板技术以酵母细胞为碳源（YC）来合成空心碳球。通过水热合成将NiCo ₂ S ₄纳米片进一步在YC表面上生长。YC上的官能团有助于金属离子的吸附，从而可以牢固地固定NiCo ₂ S ₄纳米片。YC / NiCo ₂ S ₄复合物表现出很大的电化学性能，表现出的747 F G的特定电容^-1 1 A G ^-1。此外，一个YC /镍钴组成的装置₂小号₄正极和活性炭负极节目43.7瓦公斤的最大能量密度^-1在400W千克^-1。考虑到制备酵母衍生材料对环境的影响小以及YC / NiCo ₂ S ₄的出色性能，该复合材料是用于储能装置的有前途的候选材料。