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Reconstruction of Solid Electrolyte Interphase with SrI2Reactivates Dead Li for Durable Anode-Free Li-Metal Batteries

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Angewandte Chemie 2023年第23期135卷

作者： Dr. Liwei Dong Dr. Shijie Zhong Dr. Botao Yuan Dr. Yaqiang Li Dr. Jipeng Liu Dr. Yuanpeng Ji Dr. Dongjiang Chen Dr. Yuanpeng Liu Prof. Chunhui Yang Prof. Jiecai Han Prof. Weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150080 China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150080 China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150080 China Contribution: Conceptualization (lead) Data curation (lead) Writing - original draft (lead) Contribution: Conceptualization (equal) Data curation (equal) Contribution: Data curation (equal) Investigation (equal) Contribution: Data curation (supporting) Writing - original draft (supporting) Contribution: Conceptualization (supporting) Data curation (supporting) Chongqing Research Institute Harbin Institute of Technology Chongqing 401151 China Contribution: Investigation (supporting) Writing - review & editing (supporting) Contribution: Data curation (supporting) Investigation (supporting) Contribution: Project administration (supporting) Resources (supporting) Contribution: Conceptualization (supporting) Project administration (supporting) Resources (supporting) School of Mechanical Engineering Chengdu University Chengdu 610106 China Contribution: Conceptualization (equal) Project administration (equal) Writing - original draft (equal)

Without excess Li, anode-free Li-metal batteries (AFLMBs) have been proposed as the most likely solution to realizing highly-safe and cost-effective Li-metal batteries. Nevertheless, short cyclic life puzzles conventional AFLMBs due to anodic dead Li accumulation with a local current concentration induced by irreversible electrolyte depletion, insufficient active Li reservoir and slow Li + transfer at the solid electrolyte interphase (SEI). Herein, SrI 2 is introduced into carbon paper (CP) current collector to effectively suppress dead Li through synergistic mechanisms including reversible I − /I 3 − redox reaction to reactivate dead Li, dielectric SEI surface with SrF 2 and LiF to prevent electrolyte decomposition and highly ionic conductive (3.488 mS cm −1 ) inner layer of SEI with abundant LiI to enable efficient Li + transfer inside. With the SrI 2 -modified current collector, the NCM532/CP cell delivers unprecedented cyclic performances with a capacity of 129.2 mAh g −1 after 200 cycles.

关键词： Anode-Free Li-Metal Batteries Current Collector Dead Li SrF2 SrI2

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Author Correction: Lead halide perovskite vortex microlasers

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Nature communications 2021年第1期12卷 2565页

作者： Wenzhao Sun Yilin Liu Geyang Qu Yubin Fan Wei Dai Yuhan Wang Qinghai Song Jiecai Han Shumin Xiao State Key Laboratory on Tunable laser Technology Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Shenzhen Graduate School Harbin Institute of Technology 518055 Shenzhen PR China. Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan 030006 Shanxi PR China. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology 150080 Harbin PR China. State Key Laboratory on Tunable laser Technology Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Shenzhen Graduate School Harbin Institute of Technology 518055 Shenzhen PR China. shumin.xiao@***. Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan 030006 Shanxi PR China. shumin.xiao@***. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology 150080 Harbin PR China. shumin.xiao@***.

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Shape-memory polymer nanocomposites with a 3D conductive network for bidirectional actuation 21

Shape-memory polymer nanocomposites with a 3D conductive net...

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21st International Conference on Composite Materials, ICCM 2017

作者： Zhao, Xu Peng, Qingyu He, Xiaodong Li, Yibin Science and Technology on Advanced Composites in Special Environment Laboratory Harbin China

Electrical stimulation has many advantages than thermal methods for shape-memory polymers (SMPs);the bulk polymers is essential for developing high performance electroactive systems and creating an efficient conductive path1-3 . Here, we show that a three-dimensional (3D) porous carbon nanotube sponge can serve as a built-in integral conductive network to provide internal, homogeneous, in situ Joule heating for shape-memory polymers, thus significantly improving the mechanical and thermal behavior of SMPs. As a result, the 3D nanocomposites show a fast response and produce large exerting forces during shape recovery. We further studied the construction of a double-layer composite structure for bidirectional actuation, in which the shape change is dominated by the temperature-dependent exerting force from the top and bottom layer. Our large stroke shape-memory nanocomposites have promising applications in many areas including artificial muscles and bionic robots4-5. © 2017 International Committee on Composite Materials. All rights reserved.

关键词： Bidirectional actuation Nanocomposites Shape-memory

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swTVM: Towards Optimized Tensor Code Generation for Deep Learning on Sunway Many-Core Processor

arXiv

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arXiv 2019年

作者： Li, Mingzhen Liu, Changxi Liao, Jianjin Zheng, Xuegui Yang, Hailong Sun, Rujun Xu, Jun Gan, Lin Yang, Guangwen Luan, Zhongzhi Qian, Depei School of Computer Science and Engineering Beihang University Beijing China State Key Laboratory of Software Development Environment Beijing China National University of Singapore Singapore Singapore State Key Laboratory of Mathematical Engineering and Advanced Computing Wuxi China Science and Technology on Special System Simulation Laboratory Beijing Simulation Center Beijing China Department of Computer Science and Technology Tsinghua University Beijing China

The flourish of deep learning frameworks and hardware platforms has been demanding an efficient compiler that can shield the diversity in both software and hardware in order to provide application portability. Among the existing deep learning compilers, TVM is well known for its efficiency in code generation and optimization across diverse hardware devices. In the meanwhile, the Sunway many-core processor renders itself as a competitive candidate for its attractive computational power in both scientific computing and deep learning workloads. This paper combines the trends in these two directions. Specifically, we propose swTVM that extends the original TVM to support ahead-of-time compilation for architecture requiring cross-compilation such as Sunway. In addition, we leverage the architecture features during the compilation such as core group for massive parallelism, DMA for high bandwidth memory transfer and local device memory for data locality, in order to generate efficient codes for deep learning workloads on Sunway. The experiment results show that the codes generated by swTVM achieves 1.79× on average compared to the state-of-the-art deep learning framework on Sunway, across six representative benchmarks. This work is the first attempt from the compiler perspective to bridge the gap of deep learning and Sunway processor particularly with productivity and efficiency in mind. We believe this work will encourage more people to embrace the power of deep learning and Sunway many-core processor. Copyright © 2019, The Authors. All rights reserved.

关键词： Program compilers

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Single-Atom Molybdenum-N3Sites for Selective Hydrogenation of CO2to CO

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Angewandte Chemie 2022年第37期134卷

作者： Yiqiang Jiang Yunjin Sung Changhyeok Choi Gi Joo Bang Song Hong Xinyi Tan Tai-Sing Wu Yun-Liang Soo Pei Xiong Molly Meng-Jung LI Leiduan Hao Yousung Jung Zhenyu Sun State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing 100029 China Department of Chemical and Biomolecular Engineering (BK21 four) Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea School of Chemical Engineering and the Environment Beijing Institute of Technology Beijing 100081 China National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan Department of Physics National Tsing Hua University Hsinchu 30013 Taiwan Department of Applied Physics The Hong Kong Polytechnic University Hong Kong China

The design of efficient non-noble metal catalysts for CO 2 hydrogenation to fuels and chemicals is desired yet remains a challenge. Herein, we report that single Mo atoms with a MoN 3 (pyrrolic) moiety enable remarkable CO 2 adsorption and hydrogenation to CO, as predicted by density functional theory studies and evidenced by a high and stable conversion of CO 2 reaching about 30.4 % with a CO selectivity of almost 100 % at 500 °C and very low H 2 partial pressure. Atomically dispersed MoN 3 is calculated to facilitate CO 2 activation and reduces CO 2 to CO* via the direct dissociation path. Furthermore, the highest transition state energy in CO formation is 0.82 eV, which is substantially lower than that of CH 4 formation (2.16 eV) and accounts for the dominant yield of CO. The enhanced catalytic performances of Mo/NC originate from facile CO desorption with the help of dispersed Mo on nitrogen-doped carbon (Mo/NC), and in the absence of Mo nanoparticles. The resulting catalyst preserves good stability without degradation of CO 2 conversion rate even after 68 hours of continuous reaction. This finding provides a promising route for the construction of highly active, selective, and robust single-atom non-precious metal catalysts for reverse water–gas shift reaction.

关键词： CO CO2 Hydrogenation Reverse Water–Gas Shift Reaction Single-Atom Molybdenum

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Calcined [email protected] @Rh x Ni 1- x : A novel hierarchically oriented composition tunable catalyst for green and sustainable hydrogen generation

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Journal of environmental Chemical Engineering 2022年第3期10卷

作者： Yasir Abbas Zareen Zuhra Sahresh Majeed Muhammad Shuaib Khan Majid Basharat Deependra Tyagi Shafqat Ali Zhanpeng Wu Zhaojun Liu Department of Electrical and Electronic Engineering Southern University of Science and Technology 1088 Xueyuan Blvd Nanshan District Shenzhen 518055 PR China State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing 100029 PR China Department of Environment and Civil Engineering Dongguan University of Technology Dongguan 523808 PR China Institute of Chemical Sciences Bahauddin Zakariya University Multan 60800 Pakistan International Research Center for Renewable Energy (IRCRE) State Key Laboratory of Multiphase Flow in Power Engineering (MPFE) Xi’an Jiaotong University Xi’an 710049 PR China Institute for Advanced Study Shenzhen University Nanhai Avenue 3688 Shenzhen 518060 PR China

The ever decreasing amount of fossil fuels and increasing environmental pollution are alarming threats for green and sustainable future. Designing a new catalyst is, therefore, of paramount significance in the quest to discover sustainable, robust, and environmentally benign materials for clean and sustainable energy generation. Herein, we developed a hierarchically oriented catalyst of calcined poly(ferrocenedimethano)-cyclotriphosphazene-microspheres (CPFC-MS) supported with nickel-aluminum layered double hydroxide and decorated with nanoparticles (NPs) of rhodium-nickel, [email protected] x Ni 1 - x ( x = 2.06–6.75), for H 2 generation from ammonia borane (AB) hydrolysis . The highly active catalyst was characterized by scanning electron microscopy (SEM), Raman spectroscopy , high-resolution transmission electron microscopy (HRTEM) and TEM, energy dispersive X-ray spectroscopy (EDX), fourier transform infrared (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS). The as-fabricated [email protected] @Rh x Ni 1- x ( x = 2.06–6.75) catalysts were tested for AB hydrolysis and the results showed remarkable performance and higher stability for H 2 generation. The [email protected] @Rh 2.06 Ni 7.32 catalyst, having the lowest Rh-contents, exhibited maximum H 2 generation with a turn over frequency (TOF) of 780 mol H 2 hr −1 mol Rh −1 and an activation energy (E a ) of 40.3 kJ/mol with excellent sustainability . The superior activity is ascribed to the synergetic effect between RhNi NPs and their well-dispersion over hierarchically oriented [email protected] support, while higher stability due to LDH-AlNi/RhNi attractions. This work will provide new opportunities for polyphosphazenes and LDH derived hierarchically oriented sustainable catalysts for green energy production for sustainable future.

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Preparation and characterization of high-performance ZrB2-SiC-Cf composites sintered at 1450 ℃

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Journal of advanced Ceramics 2017年第2期6卷 110-119页

作者： Wenhu HONG Kaixuan GUI Ping HU Xinghong ZHANG Shun DONG China Academy of Launch Vehicle Technology Beijing 100000 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150001 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150001 ChinaKey Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of SciencesHefei 230031 China

ZrB2-SiC-Cf composites containing 20-50 vol％ short carbon fibers were hot pressed at low sintering temperature (1450 ℃) using nanosized ZrB2 powders,in which the fiber degradation was effectively *** strain-to-failure values of such composites increased with increasing fiber content,and the value for the composite with 50 vol％ Cf was even more than 3 times higher than that of the composite with 20 vol％ ***,the composite exhibited non-brittle fracture mode when the fiber content was above 30 vol％,and the thermal shock critical temperature difference of the composite with 30 vol％ Cf was up to 727 ℃,revealing excellent thermal shock resistance of this ***,ZrB2-Sic-Cf composites displayed good oxidation resistance when the fiber content was below 40 vol％,suggesting that this method provides a promising way for preparation of high-performance ZrB2-SiC-Cf composites at low temperature.

关键词： ceramics fibers microstructure thermal shock resistance oxidation resistance

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Influence of synthesis temperatures on the crystalline grain growth and morphology of lanthanum magnesium hexaaluminate

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Journal of Rare Earths 2017年第12期35卷 1226-1232页

作者： Junbin Sun Jinshuang Wang Wenzhi Huang Yu Hui Xin Zhou Lifen Li Jianing Jiang Longhui Deng Yunya Niu Shujuan Dong Xueqiang Cao State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Science and Technology on Advanced Ceramic Fibers and Composites Laboratory National University of Defense Technology Atmospheric Environment Research Center Shenyang Academy of Environmental Sciences

Lanthanum magnesium hexaaluminate（LaMgAl（11）O（19）, LMA） was prepared at different temperatures by solid-state reaction. Phase compositions and crystal morphologies of specimens synthesized at different temperatures were investigated using X-ray diffraction（XRD）, scanning electron microscopy（SEM）. It was observed that the crystalline grain size of LMA was not only dependent on the preparation temperature but also on its powder morphology. In the temperature range of 1300 e1550℃, LMA showed platelet grain and the average crystalline grain size increases with the increase in temperature. At1600℃, if the powder was sintered for two times, the equiaxed grain could be found with the decrease in grain space, resulting in the reduction of the crystalline grain size. Styles of specimens（powder or disk） might have no obvious influence on morphologies and sizes of LMA crystalline grains which were synthesized with the well-dispersed raw material mixtures. The synthesis temperature played a key role in influencing the free space for the formation and growth of crystalline grains.

关键词： Hexaaluminate Crystalline grain growth Crystal morphology

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Synthesis and characterization of ultralong SI3N4 nanobelts with unique optical and flexible nanomechanical properties 21

Synthesis and characterization of ultralong SI3N4 nanobelts ...

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21st International Conference on Composite Materials, ICCM 2017

作者： Dong, Shun Hu, Ping Zhang, Xinghong Science and Technology on Advanced Composites in Special Environment Laboratory Harbin Institute of Technology Harbin150001 China

In this paper, several millimeters long Si3N4 nanobelts (NBs) with a cross-section of 100-700 nm in width and 30-200 nm in thickness were successfully synthesized via an effective method with the raw materials of graphite, nanosilicon and nanosilica. Alumina-assisted vapor-liquid-solid (VLS) was proposed for the growth mode of ultra-long Si3N4 NBs, in which alumina may be as a novel and highly effective mediator playing an important role in adjusting the content of reactive silicon during the growth of ultra-long Si3N4 NBs. The room-temperature photoluminescence (PL) spectrum showed that the synthesized α-Si3N4 NBs had two strong emissions peaks centered at 551 nm (2.25 eV) and 697 nm (1.78 eV) located in the yellow and red spectral range, which can be explained by the size effect and presence of a small amount of Al, offering an effective method for preparing Si3N4 nanomaterials with unique optical properties. In situ nanoindentation was used to probe the nanomechanical property of Si3N4 NBs by a hybrid SEM/SPM system and the Young’s modulus of a Si3N4 NB with about 300 nm in width and 100 nm in thickness was approximately 483.78 GPa, suggesting much larger than those of bulk and film of the Si3N4 materials, providing value and guidance for studying the properties of Si3N4 nanomaterials and for expanding their possible applications. © 2017 International Committee on Composite Materials. All rights reserved.

关键词： Nanobelts Nanoechanical Nanoindentation Optical Si3N4

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Preparation and properties of ZRB2-SIC composites by centrifugal gel casting process 21

Preparation and properties of ZRB2-SIC composites by centrif...

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21st International Conference on Composite Materials, ICCM 2017

作者： Zhang, Dongyang Hu, Ping Zhang, Xinghong Science and Technology on Advanced Composites in Special Environment Laboratory Harbin Institute of Technology Harbin150001 China

ZrB2-SiC slurry with high solid loading and low viscosity was obtained successfully, and ZrB2-SiC composites with homogeneous microstructures had been fabricated by centrifugal gel casting and pressureless sintering. The effects of pH value, dispersant and solid loading on the stability and rheological properties of ZrB2-SiC suspensions were investigated systematically. Well-dispersed ZrB2-SiC suspensions with solid loading up to 48 vol.% were achieved when 0.6 wt.% of polyacrylic acid (PAA) was added with pH=11, which was favourable for centrifugal gel casting process. After pressureless sintering at 1900°C for 2 h, ZrB2-SiC exhibited a homogeneous microstructure and an excellent mechanical properties, and the relative density, flexural strength and fracture toughness of such material were 91.2 %, 370 ± 10 MPa and 3.67 ± 0.19 MPa·m1/2, respectively. This work provide a promising method to fabricate uniform multiphase materials with high packing density. © 2017 International Committee on Composite Materials. All rights reserved.

关键词： Centrifugal gel casting Mechanical properties Pressureless sintering ZrB2-SiC

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