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An Ultra-microporous Carbon Material Boosting Integrated Capacitance for Cellulose-Based Supercapacitors

Nano-Micro Letters 2020年第5期12卷 78-94页

作者： Chenfeng Ding Tianyi Liu Xiaodong Yan Lingbo Huang Seungkon Ryu Jinle Lan Yunhua Yu Wei?Hong Zhong Xiaoping Yang State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122JiangsuPeople’s Republic of China Institute of Carbon Tech. Jeonju UniversityJeonju 55069South Korea School of Mechanical and Material Engineering Washington State UniversityPullman 99163USA

A breakthrough in advancing power density and stability of carbon-based supercapacitors is trapped by inefficient pore structures of electrode ***,an ultramicroporous carbon with ultrahigh integrated capacitance fabricated via one-step carbonization/activation of dense bacterial cellulose(BC)precursor followed by nitrogen/sulfur dual doping is *** microporous carbon possesses highly concentrated micropores(~2 nm)and a considerable amount of sub-micropores(<1 nm).The unique porous structure provides high specific surface area(1554 m^2 g^-1)and packing density(1.18 g cm^-3).The synergistic effects from the particular porous structure and optimal doping effectively enhance ion storage and ion/electron *** a result,the remarkable specific capacitances,including ultrahigh gravimetric and volumetric capacitances(430 F g^-1 and 507 F cm^-3 at 0.5 A g^-1),and excellent cycling and rate stability even at a high current density of 10 A g^-1(327 F g^-1 and 385 F cm^-3)are *** compositing the porous carbon and BC skeleton,a robust all-solid-state cellulose-based supercapacitor presents super high areal energy density(~0.77 mWh cm^-2),volumetric energy density(~17.8 W L^-1),and excellent cyclic stability.

关键词： Integrated capacitance Bacterial cellulose microporous carbon Heteroatom doping Supercapacitors

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Utilization of cationic microporous metal-organic framework for efficient Xe/Kr separation

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Nano Research 2022年第8期15卷 7559-7564页

作者： Lingshan Gong Ying Liu Junyu Ren Abdullah MAl-Enizi Ayman Nafady Yingxiang Ye Zongbi Bao Shengqian Ma Department of Chemistry University of North TexasDentonTexas 76201USA Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia

The separation of xenon/krypton(Xe/Kr)mixtures plays a vital role in the industrial process of manufacturing high-purity *** with energy-intensive cryogenic distillation,porous materials based on physical adsorption are very promising in the low-cost and energy-saving separation ***,we show that a cationic metal-organic framework(named as FJU-55)exhibits highly efficient Xe/Kr separation performance,which can be attributable to its uniform three-dimensional(3D)interconnection channels and the electro-positive features as the host ***,FJU-55 demonstrates good Xe adsorption capacity of 1.41 mmol/g and excellent Xe/Kr selectivity of 10(298 K and 100 kPa),together with a high Qst value of 39.4 kJ/mol at low coverage *** superior Xe/Kr separation performance of FJU-55 was further confirmed by the dynamic breakthrough *** obtained via molecular modeling studies have revealed that the suitable pore size and abundant accessible aromatic ligands in FJU-55 could offer strong multiple C–H∙∙∙Xe interactions,which play a collaborative role in this challenging gas separation task.

关键词： gas separation cationic metal-organic framework microporous xenon capture krypton

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Preparation and Characterization of microporous Nano-Tungsten Trioxide and Its Photocatalytic Activity after Doping Rare Earth

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Journal of Rare Earths 2006年第1期24卷 60-66页

作者：邹丽霞钟秦刘庆成 Department of Applied Chemistry East China Technology Institute Fuzhou 344000 China College of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 China College of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 China Department of Applied Chemistry East China Technology Institute Fuzhou 344000 China

Aqueous sols and gels of tungstic acid were prepared from Na2WO4 with protonated cation-exchange resin. Nano-tungsten oxide of a microporous lamella was synthesized by means of washing of WO3· 2H2O with distilled water under ultrasonic wave agitation and centrifuging repeatedly, and the specific surface area tended to increase gradually with washing and centrifuging. The sample of centrifuged 7 h has more than 2 times highs specific surface area and more high photocatalytic activity . The mechanisms are also discussed.

关键词： tungstic acid gels washing and centrifuging microporous specific surface area photocatalytic rare earth oxides

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High-performance Li-ion capacitor based on black-TiO2-x/graphene aerogel anode and biomass-derived microporous carbon cathode

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Nano Research 2019年第7期12卷 1713-1719页

作者： Guoyin Zhu Lianbo Ma Huinan Lin Peiyang Zhao Lei Wang Yi Hu Renpeng Chen Tao Chen Yanrong Wang Zuoxiu Tie Zhong Jin Key Laboratory of Mesoscopic Chemistry of MOE Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210023China Shenzhen Research Institute of Nanjing University Shenzhen 518063China

Lithium-ion capacitor (LIC) has been regarded as a promising energy storage system with high powder density and high energy ***,the kinetic mismatch between the anode and the cathode is a major issue to be *** we report a high-performance asymmetric LIC based on oxygen-deficient black-TiO2-x/graphene (B-TiO2-x/G) aerogel anode and biomass derived microporous carbon *** a facile one-pot hydrothermal process,graphene nanosheets and oxygen-vacancy-rich porous B-TiO2-x/G nanosheets were self-assembled into three-dimensional (3D) interconnected B-TiO2-x/G *** to the rich active sites,high conductivity and fast kinetics,the B-TiO2-x/G aerogel exhibits remarkable reversible capacity,high rate capability and long cycle life when used as anode material for lithium ion ***,density functional theory (DFT) calculation reveals that the incorporation of graphene nanosheets can reduce the energy barrier of Li^+ diffusion in *** asymmetric LIC based on B-TiO2-x/G aerogel anode and naturally-abundant pine-needles derived microporous carbon (MPC) cathode work well within a large voltage window (1.0-4.0 V),and can deliver high energy density (166.4 Wh·kg^-1 at 200 mA·g^-1),and high power density (7.9 kW·kg^-1 at 17.1 Wh·kg^-1).Moreover,the LIC shows a high capacitance retention of 87% after 3,000cycles at 2,000 mA·g^-*** outstanding electrochemical performances indicate that the rationally-designed LICs have promising prospect to serve as advanced fast-charging energy storage devices.

关键词： lithium-ion capacitors oxygen-deficient B-TiO2-x/graphene aerogel anode biomass-derived microporous carbon high energy density

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Large-scale carambola-like V_(2)O_(5) nanoflowers arrays on microporous reed carbon as improved electrochemical performances lithium-ion batteries cathode

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Journal of Energy Chemistry 2020年第12期29卷 388-395页

作者： Hua Tan Xin Zhi Yu Kai Huang Jianxin Zhong Bingan Lu School of Physics and Optoelectronics Hunan Institute of Advanced Sensing and Information TechnologyXiangtan UniversityXiangtan 41U05HunanChina School of Physics and Electronics State Key Laboratory of Advanced Design and Manufacturing for Vehicle BodyHunan Provincial Key Laboratory of Multi-electron based Energy Storage DevicesHunan UniversityChangsha 410083HunanChina

To search for new cathode materials with high energy density of Lithium-ion batteries(LIBs) is one of the most challenging issues. Vanadium pentoxide(V2 O5) with high theoretical specific capacity is believed to be a promising candidate for the next generation cathode materials, yet still suffers from low lithium ion diffusion coefficient and poor electronic conductivity resulting in low cycling life and poor rate performances. Here, we report new large-scale carambola-like V2 O5 nanoflowers arrays anchored on microporous reed carbon as high performances LIBs cathode. Each individual pore space of the microporous reed carbon is like a hexagonal cylinder, and the area of each carbon wall is more than103 um2, which is favorable for the growth of V2 O5 nanostructure arrays. After hydrothermal, the largescale carambola-like V2 O5 nanoflowers arrays can directly grow on the surface of microporous *** to the novel composite structures, the V2 O5 nanoflowers arrays@microporous carbon stabilizes at273 mA h g^(-1) after 100 cycles at 0.2 C. When cycling at 1.0 C over 500 cycles, the capacity still maintains at 180 mAh g^(-1). The demonstrated approach in this work paves the way for the development of high rate capability and excellent cycling stability V2 O5-based cathode materials.

关键词： V_(2)O_(5) Cathode Reed carbon microporous Lithium-ion batteries

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High-Performance Na-Ion Storage of S-Doped Porous Carbon Derived from Conjugated microporous Polymers

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Nano-Micro Letters 2019年第4期11卷 84-96页

作者： Yuquan Li Bin Ni Xiaodan Li Xianghui Wang Dafeng Zhang Qingfei Zhao Jinliang Li Ting Lu Wenjie Mai Likun Pan Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal University3663 N.Zhongshan Rd.Shanghai 200062People’s Republic of China Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632GuangdongPeople’s Republic of China School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000ShandongPeople’s Republic of China Department of Chemical Engineering School of Environmental and Chemical EngineeringShanghai University99 Shangda RoadShanghai 200444People’s Republic of China Testing and Analysis Centre College of Chemistry and Materials ScienceShanghai Normal University100 Guilin RoadShanghai 200234People’s Republic of China

Na-ion batteries(NIBs)have attracted considerable attention in recent years owing to the high abundance and low cost of *** is well known that S doping can improve the electrochemical performance of carbon materials for ***,the current methods for S doping in carbons normally involve toxic precursors or rigorous *** this work,we report a creative and facile strategy for preparing S-doped porous carbons(SCs)via the pyrolysis of conjugated microporous polymers(CMPs).Briefly,thiophene-based CMPs served as the precursors and doping sources *** direct carbonization of CMPs produced S-doped carbon materials with highly porous *** used as an anode for NIBs,the SCs exhibited a high reversible capacity of 440 mAh g?1 at 50 mA g?1 after 100 cycles,superior rate capability,and excellent cycling stability(297 mAh g?1 after 1000 cycles at 500 mA g?1),outperforming most S-doped carbon materials reported thus *** excellent performance of the SCs is attributed to the expanded lattice distance after S ***,we employed ex situ X-ray photoelectron spectroscopy to investigate the electrochemical reaction mechanism of the SCs during sodiation-desodiation,which can highlight the role of doped S for Na-ion storage.

关键词： Conjugated microporous polymer S-doped porous carbons Na-ion batteries Reaction mechanism

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Synthesis and Crystal Structure of μ_(1,1,3) Formic Bridging 3D microporous Ni(II) Complex

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Chinese Journal of Structural Chemistry 2008年第6期27卷 738-742页

作者：董文林焦敏黄柏树刘兆清 Department of Chemistry Guangzhou University

A μ1,1,3 formic bridging Ni^2＋ complex [Ni3（HCOO）6·H2O]]n 1 has been synthesized under hydrothermal conditions. The single-crystal X-ray diffraction analysis shows that 1 exhibits a 3D open microporous tube formed by covalent and coordination bonds. Complex 1 crystallizes in the monoclinic system, space group P21/c with a = 11.1487（13）, b = 9.7763（11）, c =17.9685（17）A,β= 126.948（6）°, C6H6Ni3O13, Mr = 462.02, V = 1565.2（3）A^3 Z = 4, De= 1.961 g/cm^3,μ = 3.630 mm^-1, F（000） = 917.7, Rint = 0.0234, the final R = 0.0234 and wR = 0.0734 for 3469 observed reflections （I〉2σ（I））.

关键词： formic bridge Ni(Ⅱ) complex microporous

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Solvothermal Synthesis and Crystal Structure of a Zn(Ⅱ) microporous Metal-organic Framework

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Chinese Journal of Structural Chemistry 2012年第11期31卷 1676-1680页

作者：李东平李静李旭陈萍华焦晓燕李永绣 Department of Chemistry Nanchang University Department of Biology and Chemistry College of Science and Technology Nanchang University

A novel three-dimensional Zn（II） coordination polymer, Zn3（C2H2N3）4（SiF6）, has been synthesized under solvothermal conditions using 1H-1,2,4-triazole-3-carboxylic acid and zinc fluoride as the starting materials. The complex has been characterized by elemental analysis, IR, TG analysis and single-crystal X-ray diffraction analysis. The complex crystallizes in the tetragonal 14/mmm space group with a = 11.592（0）, c = 7.526（1） A~, V= 1011.3（2）A3, Z = 2, M,. = 610.46, D, = 2.005 g/cm3 and F（000） = 596. The final R = 0.0312 and wR = 0.067 for 319 observed reflections with 1 〉 20（/）. In the title complex, the Zn centers are interconnected by μ3-bridging triazole ligands to form a microporous three-dimensional metal-organic framework.

关键词： solvothermal synthesis Zn(II) microporous metal-organic framework

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Hydrothermal Synthesis and Crystal Structure of a microporous Gallophosphate with 12-Membered Ring Channels:Ga_9(PO_4)_(12)(H_3TREN)(H_2TREN)_3·xH_2O

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Chemical Research in Chinese Universities 2004年第1期20卷 24-28页

作者： CHENXiao-bo LIYi LIGuang-hua DAIZhi-min FUWen-sheng SHIZhan ZHANGDong XUYao-hua FENGShou-hua StateKeyLaboratoryofInorganicSynthesisandPreparativeChemistry CollegeofChemistryJilinUniversityChangchun130023P.R.China

An open-framework gallophosphate, Ga_9(PO_4)_ 12[(H_3TREN)(H_2TREN)_3]·xH_2O was hydrothermally synthesized at 453 K with tris(2-aminoethyl) amine(TREN) as the organic template and characterized by single-crystal X-ray diffraction. Ga_9(PO_4)_ 12[(H_3TREN)(H_2TREN)_3]·xH_2O crystallized in a cubic space group I43m, with a=1.68552(3) nm and Z=2. The structure contains 12-membered ring channels and supercages of 1.434 nm in diameter, and is an analogue of Al_9(PO_4)_ 12(C_ 24H_ 91N_ 16)·17H_2O. Template-TREN in the supercage was different from triethylenetetraamine(TETA) used in the initial reaction mixture due to the construction transformation. The TETAs transformed into the TRENs due to the low interaction energy between the template and framework. We verified it via energy calculation and liquid state NMR.

关键词： microporous Gallophosphate Hydrothermal Energy calculation

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Manufacturing microporous Foam Zinc Materials with High Porosity By Electrodeposition

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Journal of Wuhan University of Technology(Materials Science) 2011年第5期26卷 843-846页

作者：田庆华 School of Metallurgical Science & Engineering Central South University Postdoctoral Ambulatory Station of Metallurgical Engineering Central South University

In order to get foam zinc materials of porous metal electrode,a novel method for preparing foam zinc was proposed,in which the polyurethane foam with diameter of 0.3 mm as substrate was processed by degreasing,roughening,activating,electroless plating and *** main factors affecting the process,such as ZnSO4 content,temperature,pH value,current density,and electrodes distance,were investigated *** optimal process conditions are 250 g/L ZnSO4,20 g/L Al2（SO4）3,40 g/L KAl（SO4）2,30 g/L Na2SO4,pH=3.5,4.0 cm of electrodes distance and 0.04 A/cm2 current density at 30 ℃.The result shows that adding ultrasonic on the process can elevate the deepening plating ability and current *** zinc material with a high porosity of 92.2% and a three-dimensional network structure can be fabricated by electrodeposition.

关键词： electrodeposition foam zinc microporous high porosity

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