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Improving dehydrogenation properties of Mg/Nb composite films via tuning Nb distributions

Rare Metals 2017年第7期36卷 574-580页

作者： Wen-Cheng Huang Jun Yuan Jin-Guo Zhang Jiang-Wen Liu Hui Wang Liu-Zhang Ouyang Mei-Qin Zeng Min Zhu Key Laboratory of Advanced Energy Storage Materials of Guangdong Province School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

t To investigate the effect of Nb on the dehydro- genation properties of Mg-Nb composite films, Mg/Nb eight- layer film and Mg- 10 at% Nb alloy film with the similar Mg- to-Nb atomic ratio were prepared by magnetron sputtering. Results show that both Mg/Nb eight-layer film and Mg- 10 at% Nb alloy film exhibit excellent de/hydrogenation properties. Mg- 10 at% Nb alloy film starts to release hydrogen at 108 ℃, and its desorption peak temperature is lower to 146 ℃, which is much better than that of pure MgH2 under the same condi- tion. Scanning electron microscopy （SEM） results demon- strate that the dispersive Nb nanoparticles in Mg/Nb eight- layer film may serve as nucleation sites for Mg ←→ MgH2 reactions, which can provide channels for H diffusion. For Mg- 10 at% Nb alloy film, the uniform distributions of Nb can accelerate the hydrogen diffusion and effectively improve the dehydrogenation kinetics for MgH2. This study provides an enlightening way for designing and preparing Mg-based composite films with excellent dehydrogenation properties.

关键词： Hydrogen storage Mg-Nb Sputtering thinfilm Kinetics

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Activating AIN thin film by introducing Co nanoparticles as a new anode material for thin-film lithium batteries

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Rare Metals 2018年第8期37卷 625-632页

作者： Zhong Yan Xiao-Ye Niu Xiao-Qin Du Qin-Chao Wang Xiao-Jing Wu Yong-Ning Zhou Department of Materials Science National Microanalysis CenterFudan University

A1N/Co nanocomposite thin films were fabricated by pulsed laser deposition and investigated as new anode materials for lithium-ion batteries for the first time. The combination of electrochemically inactive A1N and Co in nanometer scale boosted the electrochemical performance of the thin films surprisingly. A high reversible capacity of 555 mAh.g^-1 after 100 discharge-charge cycles at a current density of 500 mA.g^-1 is obtained for the A1N/Co nanocomposite thin films, and 372 mAh.g^-1 can be retained at a high rate up to 16C, exhibiting promising cycle stability and rate capability. The electrochemical reaction mechanism study reveals that Co nanoparticles could not only provide high electronic conductivity for the thin films, which facilitate the thorough decomposition of A1N in the initial discharge process, but also react with Li3N to form a new species CozN during charge process, thus ensuring large capacity and high reversibility of A1N/Co nanocomposite thin films in sub- sequent cycles. This study provides a new perspective to design advanced electrode materials for lithium-ion batteries.

关键词： Lithium-ion battery Anode material thinfilm Aluminum nitride Pulsed laser deposition

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维普期刊数据库

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Three-dimensionally porous polystyrene films fabricated via an ultrasound assisted template method

Three-dimensionally porous polystyrene films fabricated via ...

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2014中国功能材料科技与产业高层论坛

作者： Jinchao Zhang Guangfen Li Mengmeng Xue Hong-Zhang Geng State Key Laboratory of Hollow Fiber Membrane Materials and Processes（Tianjin Polytechnic University） School of Materials Science and EngineeringTianjin Polytechnic University

Here a novel technique was employed to fabricated three-dimensionally porous polystyrene（PS）films via ultrasound assisted template *** contrast to spin-coated thin film,different morphologies appeared on the films prepared by casting PS/toluene solution on glass *** varying either systematic parameters or intrinsic parameters,surface structures changed from two-dimension flat pores to threedimension sponge *** influences of ultrasonic intensity,frequency,irradiation time,film thickness and toluene content in water bath on surface morphologies were extensively *** electron microscopy and white-light confocal microscopy showed that PS casted films with thickness of 200μm have a higher porosity and lower surface roughness within micrometer *** contact angle measurement indicated slight changes of surface hydrophilicity with toluene content in water *** toluene content favored multilayer formation of PS film and led to monodisperse pore distribution analyzed by ImageJ.

关键词： Polystyrene ultrasonic technique thinfilm pore

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印刷电子应用越来越广

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印刷杂志 2016年第6期 14-17页

作者：吕理哲庚新(上海)计算机科技有限公司

最早的印刷电子开始于应用喷墨印刷技术,将导电材料打印在承印物上面,形成电路或天线。经过十多年的演进,现在的印刷电子已发展出更先进的印刷方法,应用更为广泛,甚至利用喷墨技术在打印过程中直接形成电子电路、传感器,形成系统和设备... 详细信息

最早的印刷电子开始于应用喷墨印刷技术,将导电材料打印在承印物上面,形成电路或天线。经过十多年的演进,现在的印刷电子已发展出更先进的印刷方法,应用更为广泛,甚至利用喷墨技术在打印过程中直接形成电子电路、传感器,形成系统和设备。印刷电子牵涉到材料、电子和喷墨技术,可以实现超低单价成本,还可以大量制造。

关键词：功能印刷 thinfilm 当纳利正美标签

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