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TiO_(2)/Cu_(2)O heterostructure enabling selective and uniform lithium deposition towards stable lithium metal anodes

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Nano Research 2023年第4期16卷 4917-4925页

作者： Lingyan Ruan Xianying Qin Kui Lin Zijin Yang Qiuchan Cai Tong Li Fangting Wu Feiyu Kang Baohua Li Shenzhen Key Laboratory on Power Battery Safety Research and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Shenzhen Graphene Innovation Center Co.Ltd. Shenzhen 518107China

Lithium(Li)metal is the ultimate anode choice for next generation high energy density ***,the high nucleation energy barrier and nonuniform electric field distribution,as well as huge volume expansion,lead to the uncontrollable growth of Li dendrites and poor utilization of Li metal,which hinders its practical ***,titanium dioxide/cuprous oxide(TiO_(2)/Cu_(2)O)heterostructure is constructed on the rimous skeleton of Cu mesh,and the heterostructure decorated rimous Cu mesh(H-CM)can act as both current collector and host for dendrite-free Li metal *** TiO_(2)/Cu_(2)O heterostructure realizes selective Li nucleation by nano TiO_(2)and then induces fast and uniform Li conduction with the aid of heterostructure interface and nano Cu_(2)O contributing to dendrite-free Li *** the internal and external space of rimous skeletons in H-CM is used to accommodate the deposited Li and buffer its volume ***,the cycling reversibility of the derived Li metal anode in H-CM is improved to a high Coulombic efficiency of 98.8%for more than 350 cycles at a current density of 1 mA·cm−2,and 1,000 h(equals to 500 cycles)stable repeated Li plating/stripping can be operated in a symmetric ***,full cells with limited Li anode and high loading LiFePO4 cathode present excellent cycling and rate performances.

关键词： lithium metal anode titanium dioxide/cuprous oxide(TiO2/Cu2O)heterostructure Cu mesh selective deposition dendritefree

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A systematical study on the electrodeposition process of metallic lithium

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Journal of Energy Chemistry 2020年第10期29卷 59-70页

作者： Hailin Fan Chunhui Gao Huai Jiang Qingyuan Dong Bo Hong Yanqing Lai School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina

In this study,commercial copper(Cu)foil and Cu foam are used as the working electrodes to systematically investigate the electrochemical deposition and dissolution processes of metallic lithium(Li)on these electrodes;Li metal deposited on the Cu foil electrode is porous and *** surface solid electrolyte interface(SEI)film after dissolution from Li dendrites maintains a dendritic porous structure,resulting in a large volume effect of the electrode during the *** Cu foam electrode provides preferential nucleation and deposition sites near the side surface of the separator;the difference in Li affinity results in a heterogeneous deposition and dendrite growth of metallic Li.

关键词： deposition behavior deposition overpotential Dendrite growth selective deposition Interface impedance

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3D-metal-embroidered electrodes:dreaming for next generation flexible and personalizable energy storage devices

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Science Bulletin 2020年第11期65卷 917-925,M0004页

作者： Jian Gou Yuxiao Wang Hongzhang Zhang Yeqiang Tan Ying Yu Chao Qu Jingwang Yan Huamin Zhang Xianfeng Li Division of Energy Storage Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China State Key Laboratory of Bio-Fibers and Eco-Textiles Institute of Marine Biobased MaterialsSchool of Materials Science and EngineeringQingdao UniversityQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

Flexible and Personalizable battery is a promising candidate for energy storage, but suffers from the weldablity and large-scale producibility of the electrode. To address the issues, we design a nickel foam catalyzed electroless deposition (NFED) derived 3D-metal-pattern embroidered electrodes. This is the first attempt to utilize this type of electrode in battery field. It is found that the current collector can be embroidered on any selected areas of any complex-shape electrodes, with high controllability and economical feasibility. As a result, the electronic conductivity of the flexible electrodes can be improved by nearly one order of magnitude, which can be easily and firmly weldded to the metal tab using the industry generic ultrasonic heating process. The embroidered electrodes could substantially promote the electrochemical performance under bending deformation, with both Li-S and Li-Li FePO4batteries as the models. This innovation is also suitable to embroider all the VIII group elements on any electrodes with personalized shapes, which is widely attractive for the development of next generation flexible and personalizable energy storage devices.

关键词： selective deposition Multi-dimensional deposition Weldability High conductivity Flexible batteries

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Atomic level deposition to extend Moore’s law and beyond

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International Journal of Extreme Manufacturing 2020年第2期2卷 29-52页

作者： Rong Chen Yi-Cheng Li Jia-Ming Cai Kun Cao Han-Bo-Ram Lee State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and Technology1037 Luoyu RoadWuhanHubeiPeople’s Republic of China Department of Materials Science and Engineering Incheon National UniversityIncheon 22012Republic of Korea

In the past decades,Moore’s law drives the semiconductor industry to continuously shrink the critical size of transistors down to 7 *** transistors further downscaling to smaller sizes,the law reaches its limitation,and the increase of transistors density on the chip *** to now,extreme ultraviolet lithography has been used in some key steps,and it is facing alignment precision and high costs for high-volume ***,the introduction of new materials and 3D complex structures brings serious challenges for top-down ***,bottom-up schemes are believed to be necessary methods combined with the top-down *** this article,atomic level deposition methods are reviewed and categorized to extend Moore’s law and ***,the deposition brings lateral angstrom resolution to the vertical direction as well as top-down etching,such as double patterning,transfer of nanowires,deposition of nanotubes,and so ***,various template-assisted selective deposition methods including dielectric templates,inhibitors and correction steps have been utilized for the alignment of 3D complex *** resolution can be achieved by inherently selective deposition,and the underlying selective mechanism is ***,the requirements for higher precision and efficiency manufacturing are also discussed,including the equipment,integration processes,scale-up issues,*** article reviews low dimensional manufacturing and integration of 3D complex structures for the extension of Moore’s law in semiconductor fields,and emerging fields including but not limited to energy,catalysis,sensor and biomedicals.

关键词： Moore’s law atomic level deposition high resolution selective deposition alignment

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Enhanced Photoelectronic Properties by CdS Nanoparticles selectively Deposited on {101} Facets of Single Crystal TiO2 Nanosheet Array Films

Enhanced Photoelectronic Properties by CdS Nanoparticles Sel...

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安徽省第四届（2016年）“卓凌杯”真空科技青年创新大赛暨学术研讨会

作者： Lei Yang Miao Zhang Jianguo Lv Gang He Zhaoqi Sun School of Physics & Material Science Anhui University Army officer academy School of Electronic & Information Engineering Hefei Normal University

Single crystal TiO nanosheet array films with dominant {001} Facets were synthesized on FTO by a hydrothermal method. A simple strategy for the selective deposition of Cd S nanoparticles on the low energy {101} facets by controlling F content on the surface of Ti O2 nanosheets is developed. For CdS/TiO, under light irradiation, the photo-generated electrons flow from {001} to {101} facets,meanwhile, the photo-generated electrons transfer from Cd S nanoparticles to the TiO nanosheets. The deposition of Cd S nanoparticles on the {101} facets will shorten the path-ways that electron must travel. Herein, the synergistic effect of selective deposition of Cd S nanoparticles on the {101} facets of Ti O2 nanosheets combined with the different band edge positions of {001} and {101} facets, which would facilitate the spatial separation of electrons and holes on different facets, leading to enhanced photoelectronic performance.

关键词： TiO2 nanosheet array {101} facets selective deposition CdS nanoparticles Photoelectronic property

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The Pattern Growth of Carbon Nanotubes by Self-assembled Monolayers Techniques

The Pattern Growth of Carbon Nanotubes by Self-assembled Mon...

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海峡两岸第二届工程材料研讨会

作者： KUO Chengtzu KUO Deshan CHEN Polin(Department of Materials Science and Engineering Chiao Tung University,Hisnchu ,Taiwan,China)

The well controllable selective growth of carbon nanotubes (CNTs)on the desired area is an important issue for their future applications. In this study, a novel method for selective growth of CNTs was proposed by using the technology of self-assembly monolayers (SAMs) and the Fe-assisted CNTs growth. The Si wafers with the a : Si/SiN layer patterns were first prepared by low pressure chemical vapor deposition (LPCVD)and lithography techniques to act as the substrates for selective deposition of SAMs. The selectivity of SAMs from APTMS solution (N-(2-aminoethyl)-3-aminopropyltrimethoxsilane) is based on its greater reactivity of head group on a-Si than SiN films. The areas of pattern with SAMs will first chelate the Fe ions by their diamine-terminated group. The Fe ions were then consolidated to become Fe-hydroxides in sodium boron hydride solution to form the Fe-hydroxides pattern. Finally, the Fe-hydroxides pattern was pretreated in H plasma to become a well-distributed Fe nano-particles on the surface, and followed by CNTs deposition using Fe as catalyst in a microwave plasma-chemical vapor deposition (MP-CVD) system to become the CNTs pattern. The products in each processing step, including microstructures and lattice images of CNTs, were characterized by contact angle measurements, scanning electron microscopy (SEM), XPS, Auger spectroscopy, transmission electron microscopy (TEM) and high resolution TEM (HRTEM) deposition. The results show that the main process parameters include the surface activation process and its atmosphere, consolidation time and temperature, H plasma pretreatment. The function of each processing step will be discussed.

关键词： carbon nanotubes self-assembled monolayers(SAMs) selective deposition chemical vapor deposition

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