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Enhanced Capacitive desalination performance of Porous Carbon Spheres@MnO2 Composite

Chinese Journal of Chemistry 2017年第1期35卷 55-60页

作者： Bingwei Chen Yanfang Wang Feng Yu Yusong Zhu Lixin Zhang Yuping Wu New Energy and Material Laboratory (NEML) Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and lnnovative Material Fudan University Shanghai 200433 China College of Energy and Institute for Electrochemical Energy Storage Nanjing Tech University Nanjing Jiangsu 211816 China

A porous carbon spheres@MnO2 composite is prepared and used as the electrosorption electrode. The MnO2 nanoparticles are evenly distributed on the porous carbon spheres. The as-prepared composite possesses high specific surface area of 258.6 m2·g -1. Its electrochemical evaluations confirm that the composite has high specific capacitance of 175 Fog-1 at a current density of 1 A·g -1 in 0.5 mol·L-1 NaC1 aqueous solution, and shows good conductivity and excellent cycling performance. Electrosorption capacity for the porous carbon spheres@MnO2 composite is 6.28 mg·g-1. Moreover, the composite electrode exhibits excellent recyclability with an efficient regeneration process.

关键词： carbon nanostructure composite electrochemical properties desalination performance

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A novel flow electrode capacitive deionization device with spindle-shaped desalting chamber

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Frontiers of Environmental Science & Engineering 2024年第4期18卷 1-4页

作者： Yunke Li Junjun Ma Chenxu Yang Jianrui Niu Yonghuan Bian Ruicheng Chen Puming Zhang Jing Zhang Chun Liu College of Environmental Science and Engineering Hebei University of Science and TechnologyShijiazhuang 050018China Pollution Prevention Biotechnology Laboratory of Hebei Province Shijiazhuang 050018China

Flow-electrode capacitive deionization(FCDI)is an innovative technology in which an intermediate chamber plays an important role in the desalination ***,relatively few studies have been conducted on the structures of these intermediate *** this study,we propose a novel flow-electrode capacitive deionization device with a spindle-shaped inlet chamber(S-FCDI).The desalination rate of the S-FCDI under optimal operating conditions was 36%higher than that of the FCDI device with a conventional rectangular chamber(R-FCDI).The spindle-shaped chamber transferred 1.2μmol more ions than the rectangular chamber,based on energy per ***,we performed a detailed analysis of different inlet chamber shapes using computational fluid dynamics *** concluded that S-FCDI has a relatively low flow resistance and almost no stagnation *** provides unique insights into the development of intermediate *** study may contribute to the improvement of the desalination performance in industrial applications of FCDI.

关键词： Spindle-shaped chamber desalination performance Flow electrode capacitive deionization

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Integration of pore structure modulation and B,N co-doping for enhanced capacitance deionization of biomass-derived carbon

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Green Energy & Environment 2023年第5期8卷 1488-1500页

作者： Yao Qiu Chunjie Zhang Rui Zhang Zhiyuan Liu Huazeng Yang Shuai Qi Yongzhao Hou Guangwu Wen Jilei Liu Dong Wang School of Materials Science and Engineering Shandong University of Technology266 Xincun West RoadZibo255000China School of Materials Science and Engineering Harbin Institute of Technology92 Xidazhi StreetHarbin150001China College of Chemistry and Environmental Engineering Shenzhen University1066 Xueyuan AveShenzhen518060China College of Materials Science and Engineering Hunan University2 South Lushan RoadChangsha410082China

Biomass-derived carbon has demonstrated great potentials as advanced electrode for capacitive deionization(CDI),owing to good electroconductivity,easy availability,intrinsic pores/***,conventional simple pyrolysis of biomass always generates inadequate porosity with limited surface ***,biomass-derived carbon also suffers from poor wettability and single physical adsorption of ions,resulting in limited desalination ***,pore structure optimization and element co-doping are integrated on banana peels(BP)-derived carbon to construct hierarchically porous and B,N co-doped carbon with large ions-accessible surface area.A unique expansionactivation(EA)strategy is proposed to modulate the porosity and specific surface area of ***,B,N co-doping could increase the ions-accessible sites with improved hydrophilicity,and promote ions *** from the synergistic effect of hierarchical porosity and B,N co-doping,the resultant electrode manifest enhanced CDI performance for NaCl with large desalination capacity(29.5 mg g^(-1)),high salt adsorption rate(6.2 mg g^(-1)min^(-1)),and versatile adsorption ability for other *** functional theory reveals the enhanced deionization mechanism by pore and B,N *** work proposes a facile EA strategy for pore structure modulation of biomass-derived carbon,and demonstrates great potentials of integrating pore and heteroatoms-doping on constructing high-performance CDI electrode.

关键词： Capacitive deionization Biomass-derived carbon Pore structure B,N co-doping desalination performance

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