检索结果-南通市图书馆

Research 2024年第2期2023卷 329-337页

作者： Lei Liu zhuzhu du Jiaqi Wang Hongfang du Sheng Wu Mengjun Li Yixuan Zhang Jinmeng Sun Zhipeng Sun Wei Ai Frontiers Science Center for Flexible Electronics(FSCFE)and Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University(NPU)127 West Youyi RoadXi'an 710072China Fujian Cross Strait Institute of Flexible Electronics(Future Technologies) Fujian Normal UniversityFuzhou 350117China School of Materials and Energy Guangdong University of TechnologyGuangzhou510006 GuangdongChina

Soft carbons have attracted extensive interests as competitive anodes for fast-charging sodium-ion batteries(SIBs);however,the high-rate performance is still restricted by their large ion migration barriers and sluggish reaction ***,we show a molecular design approach toward the fabrication of nitrogen and phosphorus codoped mesoporous soft carbon(NPSC).The key to this strategy lies in the chemical cross-linking reaction between polyphosphoric acid and p-phenylenediamine,associated with pyrolysis induced in-situ self-activation that creates mesoporous structures and rich heteroatoms within the carbon *** to the enlarged interlayer spacing,reduced ion diffusion length,and plentiful active sites,the obtained NPSC delivers a superb rate capacity of 215 mAh g-1 at 10 A g-1 and an ultralong cycle life of 4,700 cycles at 5 A g^(-1).Remarkably,the full cell shows 99%capacity retention during 100 continuous cycles,and maximum energy and power densities of 191 Wh kg^(-1)and 9.2 kW kg^(-1),*** believe that such a synthetic protocol could pave a novel venue to develop soft carbons with unique properties for advanced SIBs.

关键词： kinetics carbons linking

Synthesis and characterization of amphiphilic graphene

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2014年第2期57卷 244-248页

作者： du zhuzhu AI Wei ZHAO JianFeng XIE LingHai HUANG Wei Centre of Molecular System and Organic Devices (CMSOD) Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM) Nanjing University of Posts and Telecommunications Jiangsu-Singapore Joint Research Center for Organic/Bio- Electronics & Information Displays and Institute of Advanced Materials Nanjing University of Technology

A simple and effective method for the preparation of amphiphilic graphene(AG)is presented under an organic solvent-free synthetic *** synthetic route first involves a cyclization reaction between carboxylic groups on graphene oxide and the amino groups on 5,6-diaminopyrazine-2,3-dicarbonitrile,and subsequent reduction by *** of UV-vis spectroscopy,Fourier transformed infrared spectroscopy(FT-IR),X-ray photoelectron spectroscopy(XPS),thermogravimetric analysis(TGA)and Raman spectroscopy have confirmed that the covalent functionalization of graphene can be achieved through the formation of imidazo[4,5-b]pyrazine on the graphene *** a result,AG can be successfully dispersed in water and common organic *** work successfully provides a facile and efficient way to fabricate AG and may extend the potential applications of graphene-based materials in nanoelectronic devices,polymer fillers and biological field.

关键词： amphiphilic graphene 5,6-diaminopyrazine-2,3-dicarbonitrile cyclization reaction

Advances in the Emerging Gradient Designs of Li Metal Hosts

在线全文

学校读者我要写书评

暂无评论

Research 2022年第4期2022卷 741-756页

作者： Wanqing Guan Xiaoqi Hu Yuhang Liu Jinmeng Sun Chen He zhuzhu du Jingxuan Bi Ke Wang Wei Ai Frontiers Science Center for Flexible Electronics(FSCFE) Xi'an Institute of Flexible Electronics(IFE)and Xian Institute of Biomedical Materials Engineering(IBME)Northwestern Polytechnical University(NPU)127 West Youyi RoadXi'an710072China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingaporeSingapore 639798

Developing host has been recognized a potential countermeasure to circumvent the intrinsic drawbacks of Li metal anode(LMA),such as uncontrolled dendrite growth,unstable solid electrolyte interface,and infinite volume *** realize proper Li accommodation,particularly bottom-up deposition of Li metal,gradient designs of host materials including lithiophilicity and/or conductivity have attracted a great deal of attention in recent ***,a critical and specialized review on this quickly evolving topic is still *** this review,we attempt to comprehensively summarize and update the related advances in guiding Li nucleation and ***,the fundamentals regarding Li deposition are discussed,with particular attention to the gradient design principles of host ***,the progress of creating diferent gradients in terms of lithiophilicity,conductivity,and their hybrid is systematically ***,future challenges and perspective on the gradient design of advanced hosts towards practical LMAs are provided,which would provide a useful guidance for future studies.

关键词： conductivity unstable electrolyte

dual confinement of polysulfides in boron-doped porous carbon sphere/graphene hybrid for advanced Li-S batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2018年第9期11卷 4562-4573页

作者： Wei Ai Jiewei Li zhuzhu du Chenji Zou Hongfang du Xin Xu Yu Chen Hongbo Zhang Jianfeng Zhao Changming Li Wei Huang Ting Yu Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University (NanjingTech) 30 South Puzhu Road Nanjing 211816 China Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 50 Nanyang Avenue Singapore 637371 Singapore Shaanxi Institute of Flexible Electronics (SIFE) Northwestern Polytechnical University (NPU) 127 West Youyi Road Xran 710072 China Institute for Clean Energy & Advanced Materials Southwest University Chongqing 400715 China

A hybrid structure consisting of boron-doped porous carbon spheres and graphene （BPCS-G） has been designed and synthesized toward solving the polysulfide- shuttle problem, which is the most critical issue of current Li-S batteries. The proposed hybrid structure showing high surface area （870 m^2.g^-1） and high B-dopant content （6.51 wt.%） simultaneously offers both physical confinement and chemical absorption of polysulfides. On one hand, the abundant-pore structure ensures high sulfur loading, facilitates fast charge transfer, and restrains polysulfide migration during cycling. On the other hand, our density functional theory calculations demonstrate that the B dopant is capable of chemically binding polysulfides. As a consequence of such dual polysulfide confinement, the BPCS-G/S cathode prepared with 70 wt.% sulfur loading presents a high reversible capacity of 1,174 mAh.g^-1 at 0.02 C, a high rate capacity of 396 mAh·g^-1 at 5 G and good cyclability over 500 cycles with only 0.05% capacity decay per cycle. The present work provides an efficient and cost-effective platform for the scalable synthesis of high-performance carbon-based materials for advanced Li-S batteries.

关键词： potato starch carbon spheres graphene boron doping Li-S batteries

Interface engineering of tungsten carbide/phosphide heterostructures anchored on N,P-codoped carbon for high-efficiency hydrogen evolution reaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Materials 2022年第4期65卷 967-973页

作者： Hongfang du zhuzhu du Tingfeng Wang Song He Kai Yang Ke Wang Linghai Xie Wei Ai Wei Huang Ningbo Institute of Northwestern Polytechnical University(NPU) Frontiers Science Center for Flexible Electronics(FSCFE)Xi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&Engineering(IBME)NPUXi’an710072China Key Laboratory of Organic Electronics and Information Displays(KLOFE)&Institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing210023China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University(NanjingTech)Nanjing211816China

The development of inexpensive and efficient Pt-free electrocatalysts for the hydrogen evolution reaction(HER)is greatly crucial for water *** carbide(WC)exhibiting a Pt-like electronic structure represents an attractive alternative,although its overall performance is limited by the strong W-H bond that impedes hydrogen ***,we employed an in-situ interface engineering strategy to construct high-performance and cost effective electrocatalysts comprising WC/tungsten phosphide(WP)heterostructures that were anchored on N,P-codoped carbon(WC/WP@NPC)via a one-step pyrolysis of a melamine polyphosphate/WO_(3) hybrid in an inert *** to the crystal structure compatibility and electron-rich property of WP,it optimizes the electronic structure and hydrogen adsorption configuration of WC,thus significantly weakening the W-H bond with a thermoneutral Gibbs free energy of hydrogen adsorption(ΔG_(H^(*)))of−0.05 ***,NPC ensures fast electron transport and structural stability of the WC/WP@NPC ternary *** synergistically lead to outstanding HER performances of the catalyst in acidic and alkaline *** finding offers a new strategy for designing Pt-alternative electrocatalysts with outstanding electrochemical performances for high-efficiency water splitting and other applications.

关键词： WC WP heterostructure interface engineering hydrogen evolution reaction

A facile grinding approach to embed red phosphorus in N,P-codoped hierarchical porous carbon for superior lithium storage

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2020年第1期63卷 55-61页

作者： zhuzhu du Wei Ai Chenyang Yu Yujiao Gong Ruyi Chen Gengzhi Sun Wei Huang Key Laboratory of Flexible Electronics&Institute of Advanced Materials Nanjing Tech UniversityNanjing 211816China Institute of Flexible Electronics Northwestern Polytechnical UniversityXi’an 710072China Key Laboratory for Organic Electronics&Information Displays Institute of Advanced MaterialsNanjing University of Posts&TelecommunicationsNanjing 210023China

Despite red phosphorous(P)-based anodes hold great promise for advanced lithium-ion batteries due to their high theoretical capacity, their practical application is hindered by poor electronic conductivity and drastic volume changes during charge-discharge processes. In order to tackle these issues, herein, a facile grinding method was developed to embed sub-micro-and nano-sized red P particles in N,P-codoped hierarchical porous carbon(NPHPC). Such a unique structure enables P@NPHPC long-cyclic stability(1120 mAh g^-1 after 100 cycles at 100 mA g^-1) and superior rate performance(248 mA h g^-1 at 6400 mA g^-1). It is believed that our method holds great potential in scalable synthesis of P@carbon composites for future practical applications.

关键词： red P hierarchical porous carbon grinding composites lithium-ion batteries

Present and future of functionalized Cu current collectors for stabilizing lithium metal anodes

在线全文

学校读者我要写书评

暂无评论

Nano Research Energy 2023年第1期2卷 106-139页

作者： Yuhang Liu Yifan Li Jinmeng Sun zhuzhu du Xiaoqi Hu Jingxuan Bi Chuntai Liu Wei Ai Qingyu Yan Frontiers Science Center for Flexible Electronics(FSCFE)&Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University(NPU)127 West Youyi RoadXi'an 710072China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore639798 Singapore Institute of Materials Research and Engineering A*STAR138634 Singapore Key Laboratory of Materials Processing and Mold Ministry of Education Zhengzhou UniversityZhengzhou 450002China

Li metal has been recognized as the most promising anode materials for next-generation high-energy-density batteries,however,the inherent issues of dendrite growth and huge volume fluctuations upon Li plating/stripping normally result in fast capacity fading and safety *** Cu current collectors have so far exhibited significant regulatory effects on stabilizing Li metal anodes(LMAs),and hold a great practical potential owing to their easy fabrication,low-cost and good compatibility with the existing battery *** this review,a comprehensive overview of Cu-based current collectors,including planar modified Cu foil,3D architectured Cu foil and nanostructured 3D Cu substrates,for Li metal batteries is ***,the design principles and strategies of functionalized Cu current collectors associated with their functionalities in optimizing Li plating/stripping behaviors are ***,the critical issues where there is incomplete understanding and the future research directions of Cu current collectors in practical LMAs are also *** review may shed light on the critical understanding of current collector engineering for high-energy-density Li metal batteries.

关键词： Cu current collectors functionalization Li metal batteries lithiophilic modification Li plating/stripping

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

磺酸基修饰石墨烯复合材料的储钠性能研究

材料工程 2022年第4期50卷 36-43页

作者：吴乾鑫刘磊孙晋蒙李一帆刘宇航杜洪方艾伟杜祝祝王科西北工业大学宁波研究院浙江宁波315048 西北工业大学柔性电子前沿科学中心西安710072 西北工业大学陕西柔性电子研究院&陕西生物医学材料与工程研究院西安710072

对石墨烯进行功能化处理,可得到具有合适层间距和较高离子扩散速率的理想石墨烯基电极材料,其作为钠离子电池负极材料有着重要的应用潜力。通过在石墨烯结构中进行原位插层反应,成功制备出聚对苯乙烯磺酸钠(PSS)插层的石墨烯复合材料(PS... 详细信息

对石墨烯进行功能化处理,可得到具有合适层间距和较高离子扩散速率的理想石墨烯基电极材料,其作为钠离子电池负极材料有着重要的应用潜力。通过在石墨烯结构中进行原位插层反应,成功制备出聚对苯乙烯磺酸钠(PSS)插层的石墨烯复合材料(PSS-rGO)。这种插层结构是基于石墨烯的π电子可以与PSS结构中的π电子相互作用,使得石墨烯层间距增大并抑制其堆积。同时,PSS中的磺酸钠基团可有效提高钠离子扩散速率,增强电极对钠离子的吸附能力,从而提升钠离子电池的循环性能。利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)、拉曼光谱仪(Raman)、X射线光电子能谱仪(XPS)、电化学工作站和多通道电池综合测试仪对样品进行测试分析。结果表明,PSS-rGO电极在5 A·g^(-1)的电流密度下循环6000圈后容量可保持在256 mAh·g^(-1),单圈衰减率为0.003%,表现出优异的循环性能。本研究为开发高比容、快速储钠以及长寿命的钠离子电池负极材料提供了可行思路。

关键词：钠离子电池负极材料石墨烯磺酸钠基团原位插层

维普期刊数据库博看期刊

TMSCF3的全利用——酰胺脱氧三氟甲基化/硅基化反应

在线全文

学校读者我要写书评

暂无评论

有机化学 2024年第8期44卷 2603-2604页

作者：张珠珠储玲玲东华大学化学与化工学院先进低维材料研究中心

有机氟化合物和有机硅化合物在医药、农药、高性能材料等领域发挥着重要作用,其精准合成一直是合成化学领域的热点与难点课题之一.TMSCF3作为一种向有机分子中引入CF3基团的经典试剂[1],在有机氟化学领域得到了广泛应用[2].在少数情况下...

有机氟化合物和有机硅化合物在医药、农药、高性能材料等领域发挥着重要作用,其精准合成一直是合成化学领域的热点与难点课题之一.TMSCF3作为一种向有机分子中引入CF3基团的经典试剂[1],在有机氟化学领域得到了广泛应用[2].在少数情况下,该试剂也可作为硅基化试剂[3],向有机分子中引入TMS基团,或者在引入三氟甲基的同时,以形成氧硅键的方式将TMS保留在产物中.总体上来说,TMS在大部分情况下被浪费,导致该试剂的原子经济性较差.鉴于TMS和CF3基团的合成重要性,若能将TMSCF3发展为双功能化试剂[4],同时将TMS和CF3引入到同一分子中,不仅能够提高该试剂的原子经济性,避免废物生成,还可以构建新颖的分子结构,因此具有重要的合成意义.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

数字化转型能否改善企业漂绿行为

金融与经济 2024年第4期 39-50,65页

作者：李素梅田祝祝天津财经大学绿色经济与社会发展研究院天津财经大学图书馆天津财经大学金融学院

从数字赋能视角出发,分析数字化转型改善企业漂绿行为的影响效应及作用机理,并利用2010—2022年A股上市公司为研究样本,对数字化转型的作用效果进行检验。研究发现,数字化转型能显著改善企业漂绿行为,且这一结论在经过一系列内生性和稳... 详细信息

从数字赋能视角出发,分析数字化转型改善企业漂绿行为的影响效应及作用机理,并利用2010—2022年A股上市公司为研究样本,对数字化转型的作用效果进行检验。研究发现,数字化转型能显著改善企业漂绿行为,且这一结论在经过一系列内生性和稳健性检验后依然成立。机制分析表明,数字化转型通过降低信息不对称、提高内部控制质量、缓解融资约束、驱动绿色转型路径改善企业漂绿行为。异质性分析表明,相较于非国有企业和非重污染行业,数字化转型对企业漂绿行为的改善作用在国有企业和重污染行业中更明显。

关键词：企业漂绿数字化转型信息不对称内部控制质量融资约束绿色转型