Through uncomplicated carbonation process, a carbon-embedded CoNiSe₂/C nanosphere was synthesized from Ni-Co-MOF (metal-organic framework) precursor whose controllable structure and synergistic effect of bimetallic Ni/Co brought CoNiSe₂/C anodes with high specific surface area (172.79 m²/g) and outstanding electrochemical performance. CoNiSe₂/C anodes obtained reversible discharge capacities of 850.9 mAh/g at 0.1 A/g after cycling for 100 cycles. In addition, CoNiSe₂/C exhibits excellent cycle stability and reversibility in the rate test at a current density of 0.1–2.0 A/g. When the current density returns to 0.5 A/g for 150 cycles, its discharge ratio the capacity is 330.8 mAh/g. Electrochemical impedance spectroscopy (EIS) tests suggested that CoNiSe₂/C anodes had a lower charge transfer impedance of 130.02 Ω after 30 cycles. In-situ X-ray diffraction (XRD) tests confirmed the alloying mechanism of CoNiSe₂/C which realized higher lithium storage capacity. This work affords substantial evidence for the extension of bimetallic selenides in secondary batteries, promoting the development of bimetallic selenides in anode materials for LIBs.

通过简单的碳化过程，以 Ni-Co-MOF（金属有机骨架）前驱体合成了碳包埋的 CoNiSe ₂ /C 纳米球，其可控结构和双金属 Ni/Co 的协同效应使 CoNiSe ₂ /C 负极具有高比表面积面积（172.79 m ² /g）和出色的电化学性能。CoNiSe ₂ /C 负极在循环 100 次后在 0.1 A/g 下获得了 850.9 mAh/g 的可逆放电容量。此外，CoNiSe ₂/C在0.1-2.0 A/g电流密度下的倍率测试中表现出优异的循环稳定性和可逆性。当电流密度回到0.5A/g循环150次时，其放电比容量为330.8mAh/g。电化学阻抗谱 (EIS) 测试表明，CoNiSe ₂ /C 阳极在 30 次循环后具有较低的电荷转移阻抗，为 130.02 Ω。原位X射线衍射（XRD）测试证实了CoNiSe ₂ /C的合金化机制，实现了更高的锂存储容量。该工作为二次电池中双金属硒化物的扩展提供了实质性证据，促进了双金属硒化物在锂离子电池负极材料中的发展。