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Promoting ion adsorption and desolvation kinetics enables high capacity and rate capability of stibium anode for advanced alkaline battery

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Journal of Materials Science & Technology 2022年第36期131卷 60-67页

作者： Peng Zhang Jinhao Xie Fan Yang Xin Shi Yanxia Yu Xihong Lu College of Materials Science and Engineering Guangdong Provincial Engineering Technology Research Center of Key Material for High Performance Copper Clad LaminateDongguan Cleaner Production CenterDongguan University of TechnologyDongguan 523808China MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry The Key Lab of Low-carbon Chem and Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China School of Applied Physics and Materials Wuyi UniversityJiangmen 529020China

Stibium(Sb)metal with high theoretic capacity,suitable negative working window and inexpensive nature are promising anode material for advanced aqueous alkaline batteries(AABs).However,the further development of Sb anode is severely hindered by the low capacity and poor rate capability which is originated from deficient adsorption of[Sb(OH)_(4)]^(-)and its sluggish desolvation kinetics.Herein,a nitrogen doped carbon cages(NCCs)substrate is constructed as high capacity and rate capability anode by promoting the adsorption and following desolvation process of[Sb(OH)_(4)]^(-)via the enhanced attraction toward(OH)-in the solvated[Sb(OH)_(4)]^(-).Consequently,the designed Sb/NCCs anode delivers a high capacity of 627 m Ah g^(-1)with an average 95%Sb utilization,an outstanding coulombic efficiency(CE)of 95%and an impressive lifespan(>110 h).Meanwhile,the Ni_(3)Se_(2)//Sb/NCCs batteries show great capacity retention of 86.7%after 2000 cycles with an areal capacity of 0.52 m Ah cm^(-2).Implementation of the designed anode allows for the construction of Sb-based AABs with enhanced rate capability,energy density and cycling performance.

关键词： Aqueous alkaline batteries Stibium anode N-doped carbon ion adsorption Desolvation kinetics

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Comments on“ion adsorption components in liquid/solid systems”

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Journal of Environmental Sciences 2007年第6期19卷 768-768页

作者： LI Wei PAN Gang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Recently, Wu et al. （J Environ Sci 18（2006） 1167- 1175） published a paper entitled as above. In the paper, the authors proposed a plotting method for describing adsorption isotherms, where adsorption density （qe） was plotted against the ratio of equilibrium concentration/particle concentration （CdWo） rather than Ce as traditionally defined. The authors claimed that this plot can eliminate the ＂particle concentration effect＂（i.e., adsorption isotherms decline with increasing particle concentration）, which may otherwise be inevasihle with traditionally defined adsorption isotherms. We think that their conclusion is conceptually flawed and the plot may cause substantial inconstancy problems in practice.

关键词： ion adsorption

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A hexaazatriphenylene fused large discotic polycyclic aromatic hydrocarbon with selective and sensitive metal-ion sensing properties

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Chinese Chemical Letters 2021年第12期32卷 3837-3840页

作者： Wenxiu Qu Wei Yuan Mengwei Li Yulan Chen Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistryInstitute of Molecular PlusTianjin UniversityTianjin 300072China

A HAT based large PAH discotic molecule PN_(8)is developed. The enlarged chromophoric core and doping heteroatoms enable colorimetric and fluorometric sensing of Cu^(2+)and Zn^(2+)with highly appreciable optical changes, good selectivity and low detection limit. Moreover, PN_(8)was demonstrated as an excellent adsorbent to remove Cu^(2+)and Zn^(2+)from wastewater.

关键词： Hexaazatriphenylene ion adsorption ion sensing Polycyclic aromatic hydrocarbons Self-assembly

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Surface-adsorbed ions on TiO2 nanosheets for selective photocatalytic CO2 reduction

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Nano Research 2018年第6期11卷 3362-3370页

作者： Xiaogang Li Wentuan Bi Zhe Wang Wenguang Zhu Wangsheng Chu Changzheng Wu Yi Xie Hefei National Laboratory for Physical Sciences at the Microscale iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) and CAS Key Laboratory of Mechanical Behavior and Design of Materials University of Science and Technology of China Hefei 230026 China International Center for Quantum Design of Functional Materials (ICQD) Hefei National Laboratory for Physical Sciences at the Microscale (HFNL) Synergetic Innovation Center of Quantum Information and Quantum Physics Department of Physics and Key Laboratory of Strongly-Coupled Quantum Matter Physics Chinese Academy of Sciences School of Physical Sciences University of Science and Technology of China Hefei 230026 China National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei230026 China

A method based on the adsorption of ions on the surface of two-dimensional （2D） nanosheets has been developed for photocatalytic COz reduction. Isolated Bi ions, confined on the surface of TiO2 nanosheets using a simple ionic adsorption method facilitate the formation of a built-in electric field that effectively promotes charge carrier separation. This leads to an improved performance of the photocatalytic COa reduction process with the preferred conversion to CH4. The proposed surface ion-adsorption method is expected to provide an effective approach for the design of highly efficient photocatalytic systems. These findings could be very valuable in photocatalytic CO2 reduction applications.

关键词： two-dimensional nanomaterials surface modification ion adsorption photocatalysis TiO2 nanosheets

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Partially stabilized tetragonal ZrO_(2) whiskers with preferred [001] direction derived from CaF_(2)

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Journal of Materiomics 2021年第4期7卷 879-885页

作者： Xuefeng Liu Quan Zhang Jianmin Liu Tao Wang Yanqiao Xu Jian Liang Feng Jiang Guo Feng Weihui Jiang School of Materials Science and Engineering Jingdezhen Ceramic InstituteJingdezhen333403China National Engineering Research Center for Domestic&Building Ceramics Jingdezhen333001China

The simultaneous control of crystal phase stability and one-dimensional growth has always been the major challenge for the preparation of tetragonal zirconia whiskers.In this study,we report a facile molten salt processing that utilizes CaF_(2) as a stabilizer and adsorbent to meet the phase and morphology requirements.The processes of stabilization,phase transition,ion adsorption and formation of special morphology involved in zirconia growth were investigated by XRD,IR,SEM,DTA-TG and TEM.By controlling the amount of CaF_(2)(15 wt%)added in the reaction precursor,tetragonal zirconia whiskers with a desired aspect ratio(>16)can be synthesized,which show single crystalline nature and[001]preferred direction.Ca ions doped at low temperature inhibit the occurrence of phase transition,which allows the tetragonal structure to be retained to room temperature.The inducement and pattern of whisker growth are supposed to be F-adsorption and screw dislocation elongation,respectively.The specific selectivity of surface adsorbed ions to certain zirconia crystal planes reduces or even inhibits the epitaxial growth rate in this direction,offering a viable avenue for the morphology modulation of inorganic nanomaterials.

关键词： Tetragonal zirconia whisker Molten salt processing CaF_(2) Phase stability ion adsorption

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在石墨烯上拖动离子液滴发电的机理

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Science China Materials 2021年第9期64卷 2242-2250页

作者：张宏波张助华郭万林 State Key Laboratory of Mechanics and Control of Mechanical Structures Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Educationand Institute of NanoscienceNanjing University of Aeronautics and AstronauticsNanjing 210016China

最近的实验表明,在聚合物支撑的石墨烯上移动水滴可以在石墨烯中产生电压.为了揭示基底、石墨烯和离子水在发电中的作用,我们对水/石墨烯/基底界面进行了多尺度的分析和模拟,发现被基底上表面偶极吸引到石墨烯表面的离子会驱动石墨烯中... 详细信息

最近的实验表明,在聚合物支撑的石墨烯上移动水滴可以在石墨烯中产生电压.为了揭示基底、石墨烯和离子水在发电中的作用,我们对水/石墨烯/基底界面进行了多尺度的分析和模拟,发现被基底上表面偶极吸引到石墨烯表面的离子会驱动石墨烯中的电荷重新分布,从而在水/石墨烯/基底界面处形成由石墨烯中的镜像电荷、吸附在石墨烯表面的离子以及溶液中的反离子组成的三电层结构.当水滴在石墨烯表面移动时,动态形成的三电层前端动边界驱动着石墨烯中的电荷形成电流.采用Langmuir吸附理论,结合第一性原理计算,确定了三电层中的离子浓度,并且估计了每个被吸附的离子可在石墨烯中拖动的电荷量.由此,得到了产生的电流与离子浓度、水滴移动速率、石墨烯厚度和基底上的偶极密度、偶极矩之间的关系式,且与实验测量结果吻合.该研究结果表明,控制基底上的表面偶极(密度和大小)可优化水伏发电器件的性能并促进其实际应用.

关键词： ion adsorption drawing potential atomistic calculation graphene

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Research on Electric Mesh Grid for Seawater Desalination Based on Capacitive deionization

Research on Electric Mesh Grid for Seawater Desalination Bas...

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11th International Conference on Electrical Machines and Systems

作者： CHENG Shukang GONG Hailong GUO Bin ZHANG Peng Harbin Institute of Technology,Harbin 150080,China Harbin Institute of Technology Harbin 150080 China

ISBN: (纸本)9787506292214

＜正＞To study seawater desalination method which has low energy consumption and environmental friendly effect,the concept of electric mesh grid for seawater desalination based on capacitive deionization is proposed.The electric mesh grid adopts mesh structure and realizes the desalination function by the electric field which is produced by network of high-density with the charge of the contrary sign.The process principle of electric mesh grid is introduced in this paper.The gain condition of the surface area of electric mesh grid is discussed, the field distribution in electric mesh grid is calculated by FEA and the ion adsorption with different mesh structure is researched.The analysis results show that the electric mesh grid of same-mesh with contrary-sign has a significant advantage for increasing ion adsorption.

关键词： seawater desalination electric mesh grid electric field intensity ion adsorption

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