检索结果-南通市图书馆

Redox-active conjugated microporous polymers as electron-accepting organic pseudocapacitor electrode materials for flexible energy storage

引用

Science China Chemistry 2022年第9期65卷 1767-1774页

作者： Xu Liu Gengzhi Sun Yujiao Gong Cheng-Fang Liu Shi Wang Shihao Xu Xuanli Yang Lei Yang Wen-Yong Lai State Key Laboratory of Organic Electronics and Information Displays Institute of Advanced MaterialsNanjing University of Posts&TelecommunicationsNanjing 210023China Key Laboratory of Flexible Electronics&Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing 211816China Frontiers Science Center for Flexible Electronics Key Laboratory of Flexible Electronics of Ministry of Industry and Information TechnologyNorthwestern Polytechnical UniversityXi’an 710072China

Efficient energy storage devices,i.***.pseudocapacitors,are being intensively pursued to address the environmental and energy crises.Most high-performance pseudocapacitors are based on inorganic materials,while organic materials with broader synthetic tunability have attracted increasing interest.Despite recent progress,electron-deficient(n-type)organic pseudocapacitive materials for flexible energy storage are highly demanded yet remain largely unexplored.Here a novel set of n-type perylene diimide(PDI)based conjugated microporous polymers(CMPs),namely,CMP-1,CMP-2 and CMP-3,have been created to integrate excellent desirable characteristics as organic pseudocapacitor electrode materials for flexible energy storage.In light of electron-accepting redox-active sites,hierarchically porous structures,as well as amide-linked networks,the PDI-CMPs electrodes displayed n-type pseudocapacitive behaviors with high capacity(139-205 F g^(-1)at 0.5 A g^(-1)),wide and negative biases(-1.0 to 0 V vs.Ag/AgCl),and long cycling stability.CMP-3 consisting of tetraphenylmethane three-dimensional(3D)building block and PDI units demonstrates not only higher capacitance but also better performance stability because of the higher specific surface area and faster diffusion kinetics as compared to its counterpart CMP-1.Asymmetric supercapacitors(SCs)based on CMP-3 and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT/PSS)exhibited wider potential window(1.8 V)and higher capacitance(17.4 m F cm^(-2))compared with symmetric SCs based on PEDOT/PSS electrodes.Notably,CMP-3 also demonstrates attractive potentials as the anode for rechargeable Li-ion batteries.The study sheds light on the fundamental understanding of the key structural parameters that determine their electrochemical and transport properties,thus opening a new door for the rational design of efficient and stable n-type organic electrode materials for flexible energy storage applications.

关键词： flexible energy storage organic pseudocapacitors conjugated microporous polymers n-type electrode materials supercapacitors

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Incorporation of carbazole and boron-containing dye into conjugated microporous polymers with significant aerobic oxidative photocatalysis

Green Synthesis and Catalysis

引用

Green Synthesis and Catalysis 2022年第4期3卷 349-356页

作者： Lu Liu Kaixun Dong Mehdi Hassan Weitao Gong Jingnan Cui Guiling Ning State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China Engineering Laboratory of Boric and Magnesic Functional Material Preparative and Applied Technology Dalian 116024China Department of Chemistry University of BaltistanSkardu 16100Pakistan

Carbazole-based conjugated microporous polymers(CMPs)as a new type of advanced porous material have created tremendous research curiosities in the area of photocatalysis.Besides,introducing boron-containing dyes into the CMPs framework was rare but will be rather promising due to their unique properties,including strong electron-accepting capability,efficient catalytic behaviour,significant absorption coefficient and high quantum.Herein,we rationally designed and prepared two new CMPs,i.e.Cz-BF_(2)-CMP and Cz-BPh2-CMP with the combination of carbazole and boron-containing dye as electron donor and acceptor motifs,respectively.Due to the efficient D-A effect between carbazole and boron-dye which not only accelerated the interfacial charge transfer efficiency but also improved the separation capability of photogenerated electron-hole pairs,both CMPs exhibited excellent photocatalytic performances in organic transformations such as green synthesis of benzimidazole in aqueous solution and aerobic oxidation of thioether in EtOH.

关键词： Carbazole Boron-containing dye conjugated microporous polymers Aerobic oxidative photocatalysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tetra-armed conjugated microporous polymers for gas adsorption and photocatalytic hydrogen evolution

引用

Science China Chemistry 2017年第8期60卷 1075-1083页

作者： Yunfeng Xu Chong Zhang Pan Mu Na Mao Xue Wang Qian He Feng Wang Jia-Xing Jiang Shaanxi Normal Univ Sch Mat Sci&EngnKey Lab Macromol Sci Shaanxi ProvShaanxi Key Lab Adv Energy DevicesXian 710062ShaanxiPeoples R China Wuhan Inst Technol Minist EducKey Lab Green Chem ProcWuhan 430073HubeiPeoples R China

Two novel tetra-armed conjugated microporous polymers with different geometries have been designed and synthesized via Suzuki-Miyaura cross coupling polycondensation. Both polymers are stable in various organic solvents tested and are thermally stable. The pyrene-containing polymer of PrPy with the rigid pyrene unit shows a higher Brunauer-Emmet-Teller specific surface area of 1219 m^2 g^(-1) than the tetraphenylethylene-containing polymer of PrTPE(770 m^2 g^(-1)), which leads to a high CO_2 uptake ability of 3.89 mmol g^(-1) at 1.13 bar/273 K and a H_2 uptake ability of 1.69 wt% at 1.13 bar/77 K. The photocatalytic hydrogen production experiments revealed that PrPy also shows a better photocatalytic performance than PrTPE due to the higher conjugation degree and planar structure, the broader UV-visible(UV-Vis) absorption, the lower photoluminescence lifetime, and the higher specific surface area.

关键词： perylene conjugated microporous polymers gas adsorption hydrogen evolution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Truxene-based conjugated microporous polymers via Different Synthetic Methods

引用

Chinese Journal of Polymer Science 2020年第2期38卷 151-157,I0006页

作者： Meng-Yang Wang Qiu-Jing Zhang Qiao-Qiao Shen Qing-Yin Li Shi-Jie Ren College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University

Four truxene-based conjugated microporous polymers(Tr-CMPs)were prepared via different synthetic methods and their structure-property relationships were studied.The polymer networks have high Brunauer-Emmett-Teller(BET)specific surface areas ranging from 554 m^2·g^–1to 1024 m^2·g^–1.Pore sizes of the CMPs with different linkers are mainly located between 0.60 and 1.96 nm.Among all the Tr-CMPs,TrCMP4 has the highest BET surface area of 1024 m^2·g^–1and exhibits the highest H2 uptake of 0.88 wt%.Tr-CMP2 prepared by Suzuki-Miyaura coupling reaction has the highest photoluminescence quantum yields(PLQYs)of 13.06% and CO2 uptake of 6.25 wt%.

关键词： conjugated microporous polymers Truxene Photophysical properties Gas sorption

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

De novo synthesis of bifunctional conjugated microporous polymers for synergistic coordination mediated uranium entrapment

引用

Nano Research 2021年第3期14卷 788-796页

作者： Boxuan Yu Lei Zhang Gang Ye Qingzhi Liu Jiongli Li Xudong Wang Jing Chen Shengming Xu Shengqian Ma Collaborative Innovation Center of Advanced Nuclear Energy Technology Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing100084China Beijing Institute of Graphene Technology Beijing100094China Beijing Institute of Aeronautical Materials Beijing100085China Department of Chemistry University of South Florida4202 E.Fowler AvenueTampaFL33620USA Beijing Key Lab of Radioactive Waste Treatment Tsinghua UniversityBeijing100084China College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural UniversityQingdao266109China

This work reports a de novo synthesis of novel bifunctional conjugated microporous polymers(CMPs)exhibiting a synergistic-effect involved coordination behavior to uranium.It is highlighted that the synthetic strategy enables the engineering of the coordination environment within amidoxime functionalized CMP frameworks by specifically introducing ortho-substituted amino functionalities,enhancing the affinity to uranyl ions via forming synergistic complexes.The CMPs exhibit high Brunauer-Emmett-Teller(BET)surface area,well-developed three-dimensional(3D)networks with hierarchical porosity,and favorable chemical and thermal stability because of the covalently cross-linked structure.Compared with the amino-free counterparts,the adsorption capacity of bifunctional CMPs was increased by almost 70%,from 105 to 174 mg/g,indicating evidently enhanced binding ability to uranium.Moreover,new insights into coordination mechanism were obtained by in-depth X-ray photoelectron spectroscopy(XPS)analysis and density functional theory(DFT)calculation,suggesting a dominant role of the oxime ligands forming a 1:1 metal ions/ligands(M/L)coordination model with uranyl ions while demonstrating the synergistic engagement of the amino functionalities via direct binding to uranium center and hydrogen-bonding involved secondary-sphere interaction.This work sheds light on the underlying principles of ortho-substituted functionalities directed synergistic effect to promote the coordination of amidoxime with uranyl ions.And the synthetic strategy established here would enable the task-specific development of more novel CMP-based functional materials for broadened applications.

关键词： conjugated microporous polymers uranium adsorption synergistic coordination density functional theory

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Gas‐phase fluorination of conjugated microporous polymer microspheres for effective interfacial stabilization in lithium metal anodes

引用

Carbon Energy 2023年第10期5卷 77-90页

作者： Zihao Li Lingchen Kong Cong Peng Wei Feng School of Material Science and Engineering Tianjin UniversityTianjinChina Tianjin Key Laboratory of Composite and Functional Materials TianjinChina

Lithium(Li)metal anodes have attracted extensive attention due to their ultrahigh theoretical capacity and low potential.However,the uneven deposition of Li near the unstable electrode/electrolyte interfaces leads to the growth of Li dendrites and the degradation of active electrodes.Herein,we directly fluorinate alkyne-containing conjugated microporous polymers(ACMPs)microspheres with fluorine gas(F_(2))to introduce a novel fluorinated interlayer as an interfacial stabilizer in lithium metal batteries.Using density functional theory methods,it is found that as-prepared fluorinated ACMP(FACMP)has abundant partially ionic C–F bonds.The C–F bonds with electrochemical lability yield remarkable lithiophilicity during cycling.The in situ reactions between the active C–F bonds and Li ions enable transfer of lithium fluoride microcrystals to the solid electrolyte interphase(SEI)layers,guaranteeing effective ionic distribution and smooth Li deposition.Consequently,Li metal electrodes with the fluorinated interlayers demonstrate excellent cycling performances in both half-batteries and full cells with a lithium bis(trifluoromethanesulfonyl)imide electrolyte as well as a nonfluorinated lithium bis(oxalate)borate electrolyte system.This strategy is highly significant in customizable SEI layers to stabilize electrode interfaces and ensure high utilization of Li metal anodes,especially in a nonfluorinated electrolyte.

关键词： conjugated microporous polymers fluorinated solid electrolyte interphase gas‐phase fluorination lithium metal anodes nonfluorinated electrolyte

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Boosting Hydrogen Evolution and Oxygen Reduction Performances of Pd/C upon Surface Phosphorization

引用

Journal of Harbin Institute of Technology(New Series) 2022年第6期29卷 74-88页

作者： Tongtong Zhu Haige Wang Xiaopeng Li Yaozu Liao Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Simultaneous heterostructure and composition engineering is an effective route to construct electrocatalyst of high performance. conjugated microporous polymer(CMP) is a new emerging platform material with designable porosity and functionality. Here, a facile CMP-guest chemistry method was presented to prepare PdP2@Pd/C heterostructure with bifunctional electrocatalytic activity. The formation of heterostructure relies on a CMP precursor consisting of nitrogen groups that allow binding Pd species and introducing phosphorus inclusion. The Pd-bound CMP precursor formed in-situ could be directly converted into nitrogen-and phosphide-doped porous carbon(NPC) during pyrolysis, while P diffused to the Pd/C interface results in shallow phosphorization. The as-prepared NPC consisting of PdP2@Pd/C(Pd content 4 wt%) heterostructure demonstrated significantly enhanced electrocatalytic performances including a promising HER activity(58mV @ 10 mA/cm2), and an ORR activity approaching commercial 20 wt% Pd/C together with excellent long-term stability. Our work illustrates the intriguing power of CMP-guest potential in heterostructure engineering.

关键词： conjugated microporous polymers Palladium phosphide heterostructures Bifunctional electrocatalysts Hydrogen evolution reaction Oxygen reduction reaction Document Code

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

无催化剂硝基偶联合成偶氮基共轭微孔聚合物及其水系储能研究

引用

Science China Materials 2022年第4期65卷 958-966页

作者：房佃磊王鑫磊张士杰盛玲艳唐键周杰唐卫华 School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing210094China

发展可构建材料结构的方法对于共轭微孔聚合物(CMP)具有重要意义.目前,以偶氮键桥联氮杂并苯共轭微孔聚合物的合成仍具有极大的挑战.在此,我们以硝基化二喹喔啉并[2,3-a:2′,3′-c]吩嗪为单体,在N,N-二甲基甲酰胺与水混合溶剂中(1:3,v/v... 详细信息

发展可构建材料结构的方法对于共轭微孔聚合物(CMP)具有重要意义.目前,以偶氮键桥联氮杂并苯共轭微孔聚合物的合成仍具有极大的挑战.在此,我们以硝基化二喹喔啉并[2,3-a:2′,3′-c]吩嗪为单体,在N,N-二甲基甲酰胺与水混合溶剂中(1:3,v/v)一步水热还原合成偶氮基共价有机框架(孔径为~1.6 nm).通过原位一步还原氧化石墨烯(rGO)进行插层与自组装,获得的3Qn-CMP/rGO复合材料中CMP微球(粒径0.5-1.5µm)锚定于rGO纳米片层上(~3层).该多孔复合物具有偶氮和亚胺双重氧化还原位点及高电荷传导能力.3Qn-CMP和3Qn-CMP/rGO均在酸性水系电解质中表现出优异的电荷储存能力,倍率性(1-50 A g^(−1))和长期循环稳定性.在1 A g^(−1)的电流密度下,它们分别实现615.4和847.8 F g^(−1)的比电容,在50 A g^(−1)下充放电50,000次后的保留率高达99.1%.据我们所知,该比容量和循环稳定性优于文献中多数有机分子或CMP复合材料.该工作提供了多重结构偶氮共轭多孔聚合物材料及复合物的普适性合成策略,有望应用于电化学储能和催化等领域.

关键词： conjugated microporous polymers nitro-coupling azo hydrothermal reaction energy storage

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A redox-active conjugated microporous polymer cathode for highperformance lithium/potassium-organic batteries

引用

Science China Chemistry 2021年第1期64卷 72-81页

作者： Lian-Wei Luo Chong Zhang Peixun Xiong Yongbo Zhao Wenyan Ma Yu Chen Jing Hui Zeng Yunhua Xu Jia-Xing Jiang Key Laboratory for Macromolecular Science of Shaanxi Province Shaanxi Engineering Laboratory for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710062China Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin Key Laboratory of Composite and Functional MaterialsSchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China

Organic redox-active materials have emerged as a class of electrode materials for rechargeable batteries due to their high redox activity,low cost,structure diversity and flexibility.However,the high solubility of organic small molecules in organic electrolytes commonly leads to the fast capacity decay with cycling.Herein,we report a redox-active conjugated microporous polymer of poly(pyrene-co-anthraquinone)(Py Aq)cathode material consisting of pyrene and anthraquinone units.Benefiting from the highly cross-linked polymer structure with insoluble nature in organic electrolytes,the high surface area and the plentiful redox-active carbonyl groups,the Py Aq cathode demonstrates outstanding electrochemical performances for both lithium-ion batteries(LIBs)and potassium-ion batteries(KIBs).Specifically,the Py Aq cathode for LIBs delivers a high reversible capacity of 169 m Ah g^-1 at the current density of 20 m A g^-1,a high rate capability(142 m Ah g^-1 at 1000 m A g^-1)and an excellent cycling stability for 4000 cycles.Additionally,the Py Aq cathode for KIBs also exhibits a high reversible capacity of143 m Ah g^-1 with a long cycling life over 800 cycles.The excellent electrochemical performance demonstrates that the newly developed Py Aq could be an attractive cathode material for the advanced energy storage technologies.

关键词： conjugated microporous polymers anthraquinone organic cathode material lithium-ion battery potassium-ion battery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

In Situ Growth of Flexible Polyphenylene-conjugated microporous Polymer Films for Fluorescence Detection of the Total Quantity of Developing Agents and Their Oxidation Products

引用

Journal of Analysis and Testing 2017年第1期1卷 40-46页

作者： Langjun Zhou Yi Peng Yuling Hu Gongke Li School of Chemistry Sun Yat-sen UniversityGuangzhou 510275China

conjugated microporous polymers(CMPs)are a kind of porous skeleton polymers,which are characterized by extended conjugated skeletons,large specific surface area and structure stability.In this work,a facile and versatile method was developed to fabricate flexible conjugated microporous polymer films for fast detecting the total quantity of developing agents and their oxidation products.conjugated microporous polymer films were synthesized through in situ one-step approach by Suzuki coupling reaction.With such merits such as intense luminescence,easy synthesis and disposability,the polymer films were employed to detect developers based on fluorescence quenching in the printing wastewater.A linear response to p-benzoquinone,oxidation product of developers,was obtained in the range of 0.05-0.5 lmolL-1,with a detection limit of 0.015 lmolL-1.The strategy for in situ growth of flexible polyphenylene-conjugated microporous polymer(PP-CMP)films seems to be a very portable and general method for meeting different analytic purposes.

关键词： conjugated microporous polymers Films Fluorescence detection Developing agents

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：