A green and facile strategy was designed to fabricate Ni₃S₂-doped carbon nanosheets (Ni₃S₂@CN). In this strategy, sodium lignosulfonate was introduced as a sulfur source and carbon source to form the Ni₃S₂-doped carbon nanosheets. Nickel nitrate hexahydrate was added as a nickel source, and boric acid was used as a template agent for the formation of carbon nanosheets. As the supercapacitor electrode, Ni₃S₂@CN-0.4-600 exhibited a specific capacitance of 374.5 F g⁻¹ at the current density of 1 A g⁻¹, and achieved cyclic stability (82.9%) after 5000 charge/discharge cycles. The advantage of Ni₃S₂-doped carbon nanosheets compared to conventional products lies in its simplicity of the synthesis process and easily available biomass-feedstock. On the other hand, waste liquid discharge and process costs were further reduced by the recycling of boric acid templates, which provided a cost-efficient and environmentally friendly way to prepare carbon nanosheets. The facile and green one-step preparation of the Ni₃S₂-doped carbon nanosheet has been rarely reported previously. Thus, we wish to report the novel design and efficient electrocatalytic performance of the Ni₃S₂-doped carbon nanosheet in this work.

中文翻译：

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用木质素磺酸钠一步法合成 Ni3S2@CN 碳纳米片用于超级电容器电极的简便绿色一步法

设计了一种绿色简便的策略来制造 Ni ₃ S ₂掺杂的碳纳米片（Ni ₃ S ₂ @CN）。在该策略中，引入木质素磺酸钠作为硫源和碳源以形成Ni ₃ S ₂掺杂的碳纳米片。加入六水硝酸镍作为镍源，硼酸作为模板剂形成碳纳米片。作为超级电容器电极，Ni ₃ S ₂ @CN-0.4-600 在1 A g ^-1的电流密度下表现出 374.5 F g ^-1的比电容，并在 5000 次充放电循环后达到循环稳定性 (82.9%)。与传统产品相比，Ni ₃ S ₂掺杂的碳纳米片的优势在于其合成过程简单和易于获得的生物质原料。另一方面，硼酸模板的回收进一步降低了废液排放和工艺成本，为制备碳纳米片提供了一种经济高效且环保的方法。Ni ₃ S ₂掺杂的碳纳米片的简便且绿色的一步制备以前鲜见报道。因此，我们希望报告 Ni ₃ S ₂的新颖设计和高效的电催化性能。在这项工作中掺杂的碳纳米片。