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| Preparation of Boron and Nitrogen Co-doped Cellulose-based Carbon Dots and Their Improvement of Electrochemical Properties of Copper Sulfides |
| Received:September 25, 2024 |
| DOI：10.11980/j.issn.0254-508X.2025.02.019 |
| Key Words:cellulose carbon dots copper sulfides supercapacitors |
| Fund Project:国家自然科学基金项目（22478048）；辽宁省教育厅基本科学研究项目（JYTZD2023025）；大连市杰出青年科技人才项目（2023RJ002）；广西清洁化制浆造纸与污染控制重点实验室基金项目（2023GXZZKF09）。 |
| Author Name | Affiliation | Postcode | | DAI Yunchuan | College of Light Industry and Chemical Engineering, Liaoning Province Key Lab of Paper and Pulp Engineering, Key Lab of High Value Utilization of Botanical Resources of China Light Industry, Dalian Key Lab of High Value Application and Development of Botanical Resources, Dalian Polytechnic University, Dalian, Liaoning Province, 116034 | 116034 | | WANG Xiaodong | College of Light Industry and Chemical Engineering, Liaoning Province Key Lab of Paper and Pulp Engineering, Key Lab of High Value Utilization of Botanical Resources of China Light Industry, Dalian Key Lab of High Value Application and Development of Botanical Resources, Dalian Polytechnic University, Dalian, Liaoning Province, 116034 | 116034 | | WANG Zhiwei* | School of Light Industry and Food Engineering, Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control, Guangxi University, Nanning, Guangxi Zhuang Autonomous Region, 530004 | 530004 | | GUO Yanzhu* | College of Light Industry and Chemical Engineering, Liaoning Province Key Lab of Paper and Pulp Engineering, Key Lab of High Value Utilization of Botanical Resources of China Light Industry, Dalian Key Lab of High Value Application and Development of Botanical Resources, Dalian Polytechnic University, Dalian, Liaoning Province, 116034
School of Light Industry and Food Engineering, Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control, Guangxi University, Nanning, Guangxi Zhuang Autonomous Region, 530004 | 530004 |
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| Abstract:The boron and nitrogen co-doped cellulose-based carbon dots （B-N-CDs） were prepared by a one-step hydrothermal method using oxidized cellulose （OC） as the carbon source， boric acid and ammonia as the dopants， and then composite materials CuS/B-N-CDs were constructed by the method of low-temperature impregnation. The optical properties of the B-N-CDs and the electrochemical properties of the composite materials were systematically characterized. The results showed that the optimal excitation and emission wavelengths of B-N-CDs were 337 and 420 nm， respectively， and the average particle size was 1.79 nm. The specific capacitance of composite materials CuS/B-N-CDs at 1 A/g current density was 896.0 F/g. The asymmetric supercapacitor CuS/B-N-CDs//AC ASC assembled therefrom achieved an energy density of 60.7 Wh/kg at power density of 806.5 W/kg and it had good multiplicative performance （coulomb efficiency of 93.9%） in the current density range of 1~10 A/g. In addition， the capacitance retention rate of supercapacitor was 96.2% after 10 000 times of charging and discharging， with good cycling performance. |
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