维普中文期刊产品整合服务
18篇 您的检索式:作者名="Dazhang"
    题名 作者 年代 出处 被引量
1Water-in-salt electrolyte ion-matched N/O codoped porous carbons for high-performance supercapacitors显示文摘Pore size and distribution in carbon-based materials are regarded to be a key factor to affect the electrochemical capacitive performances of the resultant electrodes.In this study,nitrogen and oxygen codoped porous carbons(NOPCs) are fabricated based on a simple Schiff-base reaction between m-phenylenediamine and terephthalaldehyde.The NOPCs have tunable morphologies,high surface areas,abundant heteroatom doping.More importantly,the carbons show a dominant micropores of 0.5-0.8 nm,comparable to the ionic sizes of LiTFSI(Li^+0.069 nm;TFSI-0.79 nm) water-in-salt electrolyte with a high potential window of 2.2 V.Consequently,the fabricated symmetric supercapacitor gives a high energy output of 30.5 Wh/kg at 1 kW/kg,and high stability after successive 10,000 cycles with ^96.8% retention.This study provides promising potential to develop high-energy supercapacitors.Jingjing Yan Dazhang Zhu Yaokang Lv Wei Xiong Mingxian Liu Lihua Gan 2020Chinese Chemical Letters2020,31,2:6
2Model for seawater fouling and effects of temperature,flow velocity and surface free energy on seawater fouling显示文摘A kinetic model was proposed to predict the seawater fouling process in the seawater heat exchangers.The new model adopted an expression combining depositional and removal behaviors for seawater fouling based on the Kern–Seaton model.The present model parameters include the integrated kinetic rate of deposition(k d)and the integrated kinetic rate of removal(k r),which have clear physical signi ficance.A seawater-fouling monitoring device was established to validate the model.The experimental data were well fitted to the model,and the parameters were obtained in different conditions.SEM and EDX analyses were performed after the experiments,and the results show that the main components of seawater fouling are magnesium hydroxide and aluminum hydroxide.The effects of surface temperature,flow velocity and surface free energy were assessed by the model and the experimental data.The results indicate that the seawater fouling becomes aggravated as the surface temperature increased in a certain range,and the seawater fouling resistance reduced as the flow velocity of seawater increased.Furthermore,the effect of the surface free energy of metals was analyzed,showing that the lower surface free energy mitigates the seawater fouling accumulation.Dazhang Yang Jianhua Liu Xiaoxue E Linlin Jiang 2016Chinese Journal of Chemical Engineering2016,24,5:3
3Durability evaluation of building sealants by accelerated weathering and thermal analysis显示文摘Ding Suhua Liu Dazhang 2006Construction and Building Materials2006,20,:1
4Monoclinic mesoporous BiVO 4 : Synthesis and visible-light-driven photocatalytic property显示文摘Mingming Yao Mingxian Liu Lihua Gan Fengqi Zhao Xuezhong Fan Dazhang Zhu Zijie Xu Zhixian Hao Longwu Chen 2013Colloids and Surfaces A: Physicochemical and Engineering Aspects2013,,:1
5Trapping precursor-level functionalities in hierarchically porous carbons prepared by a pre-stabilization route for superior supercapacitors显示文摘Versatile module design of precursor networks enables flexible functionalization of nano-carbon electrode materials to meet the adaptable energy-storage demand. Functionalized heterogeneous networks are more likely to decompose by swift temperature programming together with predesign module removal, so high functionality/network transfer from precursor to carbon is still a work in progress. A pre-stabilization route is proposed here to enhance the network strength at early pyrolysis and pin up precursor-level functionalities on the final carbon. Such strategy successfully fixes more electroactive N(4.28-8.86 wt%) into the resultant carbon microspheres compared with non-pretreated carbon(2.89wt%), as well as achieves broad ion-accessible platforms of 1575-2269 m^(2)/g with preset structural superiorities. As a result, a typical acidic device reveals an outstanding specific capacitance of 383 F/g at 10 mV/s. Taking advantage of a novel LiNO_(3)-PAM polymer electrolyte, the upgraded symmetric device displays the maximum specific capacitance of 229 F/g, along with a boosted energy density of 41.1 Wh/kg at 643.4 W/kg. This work opens up a feasible insight into realizing highly efficient precursor/electrode design toward superior system with outstanding energy/power feature and temperature applicability.Mulati Mansuer Ling Miao Yang Qin Ziyang Song Dazhang Zhu Hui Duan Yaokang Lv Liangchun Li Mingxian Liu Lihua Gan 2023Chinese Chemical Letters2023,34,3:1
6Design and simulation of a type of four degrees of freedom parallel robot 显示文摘Xu Zhenda You Dazhang 2012Applied Mechanics and Mate- rials2012,,:1
7Highly active N,O-doped hierarchical porous carbons for high-energy supercapacitors显示文摘Highly active N,O-doped hierarchical porous carbons(NOCs)are fabricated through the in-situ polymerization and pyrolysis of o-tolidine and p-benzoquinone.As-prepared NOCs have a variety of faradaic-active species(N-6,N-5 and O-I),high ion-accessible platform(1799 m^2/g)and hierarchically micro-meso-macro porous architecture.Consequently,the resultant NOC electrode delivers an advantageous specific capacitance(311 F/g),with a pseudocapacitive contribution of 37%in a threeelectrode configuration,and an enhanced energy output of 18.0 Wh/kg@350 W/kg owing to the enlarged faradaic effect in an aqueous redox-active cell.Besides,a competitive energy density(74.9 Wh/kg)and high-potential durability(87.8%)are achieved in an ionic liquid(EMIMB F4)-assembled device.This study sheds light on a straightforward avenue to optimize the faradaic activity and nanoarchitecture for advanced supercapacitors.Ziyang Zhou Hui Duan Zhiwei Wang Yaokang Lv Wei Xiong Dazhang Zhu Liangchun Li Mingxian Liu Lihua Gan 2020Chinese Chemical Letters2020,31,5:1
8From interpenetrating polymer networks to hierarchical porous carbons for advanced supercapacitor electrodes显示文摘Hierarchical porous carbons (HPCs) are obtained via in-situ activation of interpenetrating polymer networks (IPNs) obtained from simultaneous polymerization of resorcinol/formaldehyde (R/F) and polyacrylamide (PAM). The hierarchically micro-, meso-and macroporous structure of as-prepared HPCs is attributed to the synergistic pore-forming effect of PAM and KOH, including PAM decomposition, KOH chemical activation, and a foaming process of potassium polyacrylate formed by partial hydrolysis of PAM in KOH aqueous solution. The typical HPC electrode with the highest surface area (2544 m2/g) shows a high specific capacitance of 261 F/g at 1.0 A/g and a superior rate capability of 216 F/g at 20 A/g in alkaline electrolyte. Moreover, the electrode maintains the capacitance retention of 90.8% after 10000 chargingdischarging cycles at 1.0 A/g, exhibiting long cycling life. This study highlights a new avenue towards IPNs-derived carbons with unique pore structure for promising electrochemical applications.Ling Miao Xiaoyu Qian Dazhang Zhu Ting Chen Guchuan Ping Yaokang Lv Wei Xiong Yafei Liu Lihua Gan Mingxian Liu 2019Chinese Chemical Letters2019,30,7:1
9Design and Simulation of a Type of Four Degrees of Freedom Parallel Robot 显示文摘XU Zhenda YOU Dazhang 2012Ap-plied Mechanics and Materials2012,,:1
10Low Complexity method for signal subspace fitting 显示文摘HUANG Lei WU Shunjun FENG Dazhang 2004IEE Electronics Letters2004,40,14:1
11Biosynthesis of glycyrrhetic acid 3-O-mono-β-D-glucuronide catalyzed by β-D-glucuronidase with enhanced bond selectivity in ionic liquid/buffer biphasic system 显示文摘He Dongmei Kaleem Imdad Dai Dazhang Li Chun 2010Process Biochemistry2010,45,12:1
12Optical control of transverse motion of ionization injected electrons in a laser plasma accelerator显示文摘We demonstrate an all-optical method for controlling the transverse motion of an ionization injected electron beam in a laser plasma accelerator by using the transversely asymmetrical plasma wakefield. The laser focus shape can control the distribution of a transversal wakefield. When the laser focus shape is changed from circular to slanted elliptical in the experiment, the electron beam profiles change from an ellipse to three typical shapes. The three-dimensional particlein-cell simulation result agrees well with the experiment, and it shows that the trajectories of these accelerated electrons change from undulating to helical. Such an all-optical method could be useful for convenient control of the transverse motion of an electron beam, which results in synchrotron radiation from orbit angular momentum.Jie Feng Yifei Li Jinguang Wang Dazhang Li Changqing Zhu Junhao Tan Xiaotao Geng Feng Liu Liming Chen 2021High Power Laser Science and Engineering2021,9,1:0
13Porous carbon globules with moss-like surfaces from semi-biomass interpenetrating polymer network for efficient charge storage显示文摘The bio-nanotechnological fabrication of high-surface-area carbons has attracted widespread interest in supercapacitor applications by using readily-available natural products as raw materials or bio-templates,and is expected to refine on pore accessibility for compact energy storage. Here, a renovated design strategy of semi-biomass interpenetrating polymer network(IPN) derived carbon is demonstrated through physically knitting the biomacromolecule(sodium alginate, SA) polymeric chains into the highly crosslinked resorcinol-formaldehyde(RF) network and subsequent thermochemical conversion. Moleculelevel interlacing forces in such IPN efficiently relieve the RF skeleton shrinkage when producing carbon,while the other SA network addresses the macrophase separation issue to sacrifice as an in-knitted porogen and a morphology-directing agent. As a result, porous carbon globules are equipped with moss-like surfaces and interconnected pore architecture for high accessible electrode surface(1013 m^(2)/g), and efficient electrochemical responses are reached with the specific capacitance of 312 F/g at 1 A/g. Taking the advantage of 9 mol/kg NaClO_(4) complex-solvent electrolyte, the voltage window is extended to 2.4 V,endowing the two-electrode device with the high energy delivery of 32.3 Wh/kg at 240 W/kg.Guchuan Ping Ling Miao Abuduheiremu Awati Xiaoyu Qian Ting Shi Yaokang Lv Yafei Liu Lihua Gan Mingxian Liu Dazhang Zhu 2021Chinese Chemical Letters2021,32,12:0
14Collimated gamma rays from laser wakefield accelerated electrons显示文摘Betatron radiation from laser wakefield accelerated electrons and X-rays scattered off a counter-propagating relativistic electron bunch arecollimated and hold the potential to extend the energy range to hard X-ray or gamma ray band. The peak brightness of these incoherent radiations could reach the level of the brightest synchrotron light sources in the world due to their femtosecond pulse duration and source sizedown to a few micrometers. In this article, the principle and properties of these radiation sources are briefly reviewed and compared. Then wepresent our recent progress in betatron radiation enhancement in the perspective of both photon energy and photon number. The enhancement istriggered by using a clustering gas target, arousing a second injection of a fiercely oscillating electron bunch with large charge or stimulating aresonantly enhanced oscillation of the ionization injected electrons. By adopting these methods, bright photon source with energy over 100 keVis generated which would greatly impact applications such as nuclear physics, diagnostic radiology, laboratory astrophysics and high-energydensity science.Minghua Li Liming Chen Dazhang Li Kai Huang Yifei Li Yong Ma Wenchao Yan Mengze Tao Junhao Tan Zhengming Sheng Jie Zhang 2018Matter and Radiation at Extremes2018,3,4:0
15Injection induced by coaxial laser interference in laser wakefield accelerators显示文摘We propose a new injection scheme that can generate electron beams with simultaneously a few permille energy spread, submillimeter milliradian emittance, and more than a 100 pC charge in laser wakefield accelerators. In this scheme, a relatively loosely focused laser pulse drivesthe plasma wakefield, and a tightly focused laser pulse with similar intensity triggers an interference ring pattern that creates onion-like multisheaths in the plasma wakefield. Owing to the change in wavefront curvature after the focal position of the tightly focused laser, the innermostsheath of the wakefield expands, which slows down the effective phase velocity of the wakefield and triggers injection of plasma electrons.Both quasicylindrical and fully three-dimensional particle-in-cell simulations confirm the generation of beams with the above mentionedproperties.Jia Wang Ming Zeng Dazhang Li Xiaoning Wang Wei Lu Jie Gao 2022Matter and Radiation at Extremes2022,7,5:0
16High-energy aqueous supercapacitors enabled by N/O codoped carbon nanosheets and“water-in-salt”electrolyte显示文摘A facile fabrication strategy is reported to obtain N/O codoped porous carbon nanosheets for pur-pose of ameliorating the charge transfer and accumulation in the concentrated LiTFSI(lithium bis(trifluoromethane sulfonyl)imide)electrolyte.By tunning the feed ratio of comonomers,the porous nanosheet structure is endowed with a significant ion-adsorption surface area(1630 m^(2)/g)and intercon-nected hierarchical porosity;meanwhile,high-level N/O dopants(N:3.58 at%,O:12.91 at%)increase the effective contact area for electrolyte ions,and further facilitate rapid ion/electron transfer.Benefiting from the advantageous features,carbon nanosheets electrode reveal an enhanced specific capacitance(375 F/g)in three-electrode configuration and the H_(2)SO_(4)-based device yields a high gravimetric energy density of 11.4 Wh/kg.Particularly,the ion-diffusion highways in porous carbon nanosheets contribute to the 2.25 V LiTFSI-based symmetric device with a high energy delivery up to 33.1 Wh/kg.This work offers an in-spiring strategy for facile fabrication of carbon nanosheets,and demonstrates their promising application in“water-in-salt”electrolyte-based supercapacitor systems.Jingjing Yan Ling Miao Hui Duan Dazhang Zhu Yaokang Lv Liangchun Li Lihua Gan Mingxian Liu 2022Chinese Chemical Letters2022,33,5:0
17在为狭窄带宽的软 X 光检查产生的 SXFEL 的单个阶段 EEHG显示文摘使回响能的泛音产生(EEHG ) 计划为高效地在起始的种子激光的很高的泛音产生强烈协调放射保持有希望的前景。在这份报纸,我们学习与单个阶段 EEHG 安装操作上海 X 光检查免费电子的激光测试设备的可行性。与存在数字代码的联合,就各种各样的三维的效果而言的 start-to-end 模拟被执行了显示出 EEHG FEL 的可能的表演。模拟结果证明阶段 EEHG 能高产生的一个单身者从紫外种子激光直接与狭窄的带宽驱动软 X 光检查放射脉搏。在放射激光的泛音的帮助下技术或升级的线性加速器,我们也显示出与单个阶段 EEHG 在水窗户中产生协调软 X 光检查放射的可能性。Chao Feng Dazhang Huang Haixiao Deng Jianhui Chen Dao Xiang Bo Liu DongWang Zhentang Zhao 2016Science Bulletin2016,61,15:0
18Recent advances in zinc-ion hybrid energy storage: Coloring high-power capacitors with battery-level energy显示文摘Zinc-ion hybrid capacitors(ZICs) are considered as newly-emerging and competitive candidates for energy storage devices due to the integration of characteristic capacitor-level power and complementary battery-level energy. The practical application of rising ZICs still faces the specific capacity and dynamics mismatch between the two electrodes with different energy storage mechanisms, which cannot meet the ever-growing indicator demand for portable electronic displays and public traffic facilities. Focusing on these unresolved issues, this mini-review presents recent advances in ZICs referring to the hybrid energy storage mechanism, design strategies of both capacitor-type and battery-type electrode materials, and electrolyte research toward advanced performances(e.g., high operational potential, wide adaptive temperature). Finally, current challenges and future outlook have been proposed to guide further exploration of next-generation ZICs with a combination of high-power delivery, high-energy output and high-quality service durability.Ling Miao Yaokang Lv Dazhang Zhu Liangchun Li Lihua Gan Mingxian Liu 2023Chinese Chemical Letters2023,34,7:0
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费