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Microporous carbon nanofibers prepared by combining electrospinning and phase separation methods for supercapacitor

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Journal of Energy Chemistry 2016年第4期25卷 587-593页

作者： Chang Liu Yongtao Tan Ying Liu kuiwen shen Bowu Peng Xiaoqin Niu Fen Ran School of Material Science and Engineering Lanzhou University of Technology State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology

Microporous carbon nanofibers (MCNFs) derived from polyacrylonitrile nanofibers were fabricated via electrospinning technology and phase separation in the presence of polyvinylpyrrolidone (PVP). PVP together with a mixed solvent of N, N-Dimethylformamide and dimethyl sulfoxide was used as pore forming agent. The influences of PVP content in casting solution on the structure and electrochemical performance of the MCNFs were also investigated. The highest capacitance of 200 F/g was obtained on a three-electrode system at a scan rate of 0.5 A/g. The good performance was owing to the high specific surface area and the large amount of micro-pores, which enhanced the absorption and the transportation efficiency of electrolyte ion during charge/discharge process. This research indicated that the combination of electrospinning and phase separation technology could be used to fabricate microporous carbon nanofibers as electrode materials for supercapacitors with high specific surface area and outstanding electrochemical performance. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.

关键词： Supercapacitor Electrospinning Nanofiber Phase separation

A hierarchical porous carbon membrane from polyacrylonitrile/polyvinylpyrrolidone blending membranes: Preparation,characterization and electrochemical capacitive performance

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Journal of Energy Chemistry 2014年第6期23卷 684-693页

作者： Huili Fan Fen Ran Xuanxuan Zhang Haiming Song Wenxia Jing kuiwen shen Lingbin Kong Long Kang School of Materials Science and Engineering Lanzhou University of Technology State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology

Novel hierarchical porous carbon membranes were fabricated through a simple carbonization procedure of well-defined blending polymer membrane precursors containing the source of carbon polyacrylonitrile （PAN） and an additive of polyvinylpyrrolidone （PVP）, which was prepared using phase inversion method. The as-fabricated materials were further used as the active electrode materials for supercapacitors. The effects of PVP concentration in the casting solution on structure feature and electrochemical capacitive performance of the as-prepared carbon membranes were also studied in detail. As the electrode material for supercapacitor, a high specific capacitance of 278.0 F/g could be attained at a current of 5 mA/cm2 and about 92.90% capacity retention could be maintained after 2000 charge/discharge cycles in 2 mol/L KOH solution with a PVP concentration of 0.3 wt% in the casting solution. The facile hierarchical pore structure preparation method and the good electrochemical capacitive performance make the prepared carbon membrane particularly promising for use in supercapacitor.

关键词： porous carbon supercapacitors phase separation electrode materials additive

锂离子电池废弃正极浆料回收废水处理工程实例

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水处理技术 2023年第11期49卷 147-149,156页

作者：徐治伟申魁文马腾越丁前福杨云广李长东屏南时代新材料技术有限公司福建宁德352300 广东邦普循环科技有限公司广东佛山528100

锂离子电池废弃正极浆料回收过程中不可避免的会产生含NMP废水。由于NMP和水任意比例互溶,且具有高氨氮、高COD、挥发性低和极性高等特点,采用常规处理方法处理含NMP废水,不仅成本高,且处理后的废水氨氮、COD指标无法达到排放标准。因此... 详细信息

锂离子电池废弃正极浆料回收过程中不可避免的会产生含NMP废水。由于NMP和水任意比例互溶,且具有高氨氮、高COD、挥发性低和极性高等特点,采用常规处理方法处理含NMP废水,不仅成本高,且处理后的废水氨氮、COD指标无法达到排放标准。因此,采用常规的废水处理工艺很难使最终排放的废水符合排放标准。本文对锂离子电池废弃正极浆料回收过程中产生的废水进行研究,采用絮凝、压滤对废水进行初步处理,实现固液分离,采用高温催化分离和电氧化法去除废水中的大部分NMP后,再依次经絮凝沉淀、生化处理及多级过滤,使最终出水COD<50 mg/L,氨氮<10 mg/L,出水指标达到《污水综合排放标准》(GB 8978-1996)一级标准。

关键词：锂离子电池正极废弃浆料废水 N-甲基吡咯烷酮

荧光定量PCR法检测肉制品中小肠结肠炎耶尔森菌

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食品安全导刊 2024年第35期 79-82页

作者：于明明孙广雷汪忆梦姜丽丹沈万恒潍坊市疾病预防控制中心山东潍坊261061 潍坊市奎文区疾病预防控制中心山东潍坊261041 潍坊市益都中心医院山东潍坊262500

目的:进一步提高肉制品中小肠结肠炎耶尔森菌的检出效率。方法:按照《食品安全国家标准食品微生物学检验小肠结肠炎耶尔森氏菌检验》(GB 4789.8—2016)进行样品处理、增菌,采用荧光定量聚合酶链式反应(Polymerase Chain Reaction,PCR)... 详细信息

目的:进一步提高肉制品中小肠结肠炎耶尔森菌的检出效率。方法:按照《食品安全国家标准食品微生物学检验小肠结肠炎耶尔森氏菌检验》(GB 4789.8—2016)进行样品处理、增菌,采用荧光定量聚合酶链式反应(Polymerase Chain Reaction,PCR)方法对增菌液进行初筛,初筛阳性的样本进行菌株分离,挑取选择性平板上典型菌落进行PCR鉴定及生化验证。结果:荧光定量PCR方法能够检出肉制品中低污染水平(1~10 CFU·mL^(-1))的小肠结肠炎耶尔森菌;352份肉制品中共检出小肠结肠炎耶尔森菌阳性样本34份,总检出率为9.66%,其中禽肉检出率为8.94%(27/302),猪肉检出率为14.0%(7/50)。结论:肉制品中小肠结肠炎耶尔森菌污染率较高,采用荧光定量PCR结合传统生化分离法能提高肉制品中小肠结肠炎耶尔森菌检测效率,减少漏检。

关键词：小肠结肠炎耶尔森菌肉制品实时荧光聚合酶链式反应

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