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Wafer-Scale Ag₂S-Based Memristive Crossbar Arrays with Ultra-Low Switching-Energies Reaching Biological Synapses

NANO-MICRO LETTERS 2025年第1期17卷 1-12页

作者： Zhu, Yuan Nyberg, Tomas Nyholm, Leif Primetzhofer, Daniel Shi, Xun Zhang, Zhen Uppsala Univ Dept Elect Engn Div Solid State Elect S-75121 Uppsala Sweden Uppsala Univ Dept Chem Uppsala Sweden Uppsala Univ Dept Phys & Astron Uppsala Sweden Chinese Acad Sci Shanghai Inst Ceram State Key Lab High Performance Ceram & Superfine M Shanghai 200050 Peoples R China

Memristive crossbar arrays (MCAs) offer parallel data storage and processing for energy-efficient neuromorphic computing. However, most wafer-scale MCAs that are compatible with complementary metal-oxide-semiconductor (CMOS) technology still suffer from substantially larger energy consumption than biological synapses, due to the slow kinetics of forming conductive paths inside the memristive units. Here we report wafer-scale Ag2S-based MCAs realized using CMOS-compatible processes at temperatures below 160 degrees C. Ag2S electrolytes supply highly mobile Ag+ ions, and provide the Ag/Ag2S interface with low silver nucleation barrier to form silver filaments at low energy costs. By further enhancing Ag+ migration in Ag2S electrolytes via microstructure modulation, the integrated memristors exhibit a record low threshold of approximately - 0.1 V, and demonstrate ultra-low switching-energies reaching femtojoule values as observed in biological synapses. The low-temperature process also enables MCA integration on polyimide substrates for applications in flexible electronics. Moreover, the intrinsic nonidealities of the memristive units for deep learning can be compensated by employing an advanced training algorithm. An impressive accuracy of 92.6% in image recognition simulations is demonstrated with the MCAs after the compensation. The demonstrated MCAs provide a promising device option for neuromorphic computing with ultra-high energy-efficiency.

关键词： Wafer-scale Ag2S films Reactive sputter Silver nucleation Ag+ migration Energy-efficient neuromorphic computing

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Advances of graphene application in electrode materials for lithium ion batteries

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Science China(Technological Sciences) 2015年第11期58卷 1829-1840页

作者： LU XiaoYu JIN XiHai SUN Jing state key lab of high performance ceramics and superfine microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences

The demands for better energy storage devices due to fast development of electric vehicles(EVs) have raised increasing attention on lithium ion batteries(LIBs) with high power and energy densities. In this paper, we provide an overview of recent progress in graphene-based electrode materials. Graphene with its great electrical conductivity and mechanical properties have apparently improved the performance of traditional electrode materials. The methods and electrochemical properties of advanced graphene composite as cathode and anode for LIBs are reviewed. Two novel kinds of graphene hybrid materials are specially highlighted: three-dimensional porous and flexible binder-free graphene-based materials. Challenges for LIBs and future research trend in the development of high-performance electrode materials are further discussed.

关键词： lithium ion batteries (LIBs) graphene cyclability rate capability nanomaterials three dimensional structure flexibleand binder-free electrode

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Synthesis of high Surface Area and Well Crystallized Mesoporous WC at Low Temperature with a Pore Structure Collapsed Replication Route

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Journal of Wuhan University of Technology(Materials Science) 2011年第1期26卷 105-110页

作者：李华施剑林 Department of Inorganic Materials College of Chemistry Chemical Engineering and Materials Science Soochow University state key lab of high performance ceramic and superfine microstructure Shanghai Institute of Ceramic Chinese Academy of Science

An approach named ＂pore structure collapsed replication route＂ has been developed to prepare mesoporous WC materials with a high surface area （105 m2/g） and crystallized framework at a temperature as low as 700 ℃. The XRD, TEM, EDS, and BET characterizations were conducted to analyze the effects of the synthesis parameters and the template types on the structure of mesoporous WC. The compaction on the templates is the key to form mesoporous structure of WC while the templates help to control the size of crystalline. At a content of 7 wt% for the precursor of WC, the mesoporous WC could be formed with well ordered structure.

关键词： mesoporous WC pore structure collapsed replication low temperature synthesis parameters

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Synthesis, Crystal Structure, Fluorescent and Thermal Properties of Sodium Tridecafluorodizirconate Na_5Zr_2F_(13) Compound

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Chinese Journal of Structural Chemistry 2006年第2期25卷 173-179页

作者： MAO Shao-Yu KANG You-Jun MI Jin-Xiao LI Man-Rong WEI Zan-Bin WU Xue-Yan ZHAO Jing-Tai College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China state key lab of high performance ceramic and superfine microstructure Shanghai Institute of Ceramics The Chinese Academy of Sciences Shanghai 200050 China

Crystals of sodium tridecafluorodizirconate Na5Zr2F13 were synthesized under mild hydrothermal conditions, and the structure was refined by single-crystal X-ray diffraction. The compound crystallizes in monoclinic with crystallographic data： Mr = 544.39, C2/m （No. 12）, a = 11.5600（9）, b = 5.4759（4）, c = 8.3989（6） A°, β = 97.361（10）°, V= 527.28（7） A°^3, Z= 2, Dc = 3.429 g/cm^3, 2 = 0.71073A° ,μ = 23.48 cm^-1, F（000） = 504, T= 295 K, Ri = 0.0173 and wR2 = 0.0449 for 55 variables and 682 contributing uniqUe reflections. The crystal structure is constituted with sixand eight-fold sodium atoms, forming irregular trigonal prisms and irregular cubes, respectively. Here, the zirconium atoms are connected with seven fluorine atoms to form a mono-capped trigonal prism. [Zr2F13]^5- complex ions formed by comer-shared [ZrF7]^3- are comer- and edgeshared to [Na4F22] and [Na3F8] cages, leading to the network structure. Thermal analysis, X-ray excited luminescence and photoluminescence under UV light measurements were conducted on Na5Zr2F13 crystals.

关键词： sodium tridecafluorodizirconate hydrothermal synthesis crystal structure luminescent

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Blue-shift of Nano-Y_2O_3 : Eu^(3+) Emission Spectra Excited by X-ray

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Journal of Materials Science & Technology 1997年第4期13卷 351-353页

作者： Qiang LI Lian GAO and Dongsheng YAN(state key lab. of high performance ceramics & superfine microstructure, Shanghai Institute of ceramics,Chinese Academy of Sciences, Shanghai 200050, China) state key lab. of high performance ceramics and superfine microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

Nano-Y_2O_3:Eu^(3+) powder was prepared by the homogeneous precipitation. With controlling the conditions of the reaction, nano powders with different grain size were obtained. It is found that the blue-shift phenomena exist in the nano-Y2O3:Eu3+ emission spectra excited by X-ray. The wave lengths of the peak (5D0→7F2) are related with the grain size of the powder

关键词： Eu Nano Emission Spectra Excited by X-ray Blue-shift of Nano-Y2O3

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Preparation and Properties of Nano-TiO_2 Powders

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Journal of Materials Science & Technology 1997年第4期13卷 321-323页

作者： Zhe SONG Qing LI and Lian GAO(state key lab. of high performance ceramics & superfine microstructure, Shanghai Institute of ceramics,Chinese Acadmey of Sciences, Shanghai 200050, China) state key lab. of high performance ceramics and superfine microstructure Shanghai Institute of Ceramics Chinese Acadmey of Sciences Shanghai 200050 China

This paper reports the preparation of nano-TiO2 (about 10 nm) powder by the method of precipitation. In detail, some breparation conditions were investigated in order to find out how to control the grain size and reduce the agglomeration of powders. Also, the reflex spectra of nano-scale powders with different grain size were studied. It tvas found that the wave length and width of reflex spectra are connected with the grain size of nano-TiO2 powders

关键词： TiO Nano Preparation and Properties of Nano-TiO2 Powders OC

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Simultaneous Al2O3 Doping and Sulfation in Hierarchically Porous ZrO2 Solid Acids by an One-pot Synthesis for Enhanced Recycling Catalytic performances

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Chinese Journal of Chemistry 2011年第3期29卷 483-488页

作者： Wang, Nan Chen, Yu Ye, Zhengqing Chen, Hangrong Shi, Jianlin state key lab of high performance ceramics and superfine microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

Alumina doping and sulfation in hierarchically porous zirconia solid acids have been achieved simultaneously via one-pot and bi-surfactant-assisted self-assembly process, using aluminum sulfate as both Al and SO^2- sources. The prepared composite solid acids showed much enhanced acidity and recycling catalytic activity for an esterification reaction compared with sulfated zirconia without alumina doping and Al-doped sulfated zirconia without hierarchically porous structure.

关键词： one-pot synthesis doping Al-promoted sulfated zirconia hierarchical porous structure material science self-assembly

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Preparation and Luminescence Properties of Gadolinium Aluminate Phosphor Material Chip

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Journal of Rare Earths 2005年第S1期23卷 36-39页

作者：罗岚刘庆峰刘茜 School of Material Science and Engineering Nanchang University Nanchang 330047 China State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Science Shanghai 200050 China state key lab of high performance ceramics and superfine microstructure Shanghai Institute of Ceramics Chinese Academy of Science Shanghai 200050 China

The combinatorial material chip approach is an excellent innovation for inorganic functional material research, and it can discover and screen new materials efficiently. In the present work, the approach was used to find quickly and improve gadolinium aluminate phosphors (Gd_ 1-xAl_yO_z∶RE_x). Under UV lamp excited (λ_ ex=254 nm) the Gd_ 1-xAl_yO_z∶RE_x phosphor material chip evaluation shows that the suitable n(Al)∶n(Gd) in host materials is 1∶1 for Eu and Tb ion activators. The luminescence character coherence between combinatorial material chip and parallelism powder samples produced by nitric-citric process was also confirmed.

关键词： combinatorial material chip gadolinium aluminum citrate-nitrate combustion luminescence

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Plasma-induced nanowelding of a copper nanowire network and its application in transparent electrodes and stretchable conductors

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Nano Research 2016年第7期9卷 2138-2148页

作者： Ranran Wang Haitao Zhai Tao Wang Xiao Wang Yin Cheng Liangjing Shi Jing Sun The state key lab of high performance ceramics and superfine microstructure Shanghai Institute of Ceramics Chinese Academy ot Sciences 1295 Dingxi Road Shanghai 200050 China

Copper nanowires （Cu NWs） have attracted increasing attention as building blocks for electronics due to their outstanding electrical properties and low cost. However, organic residues and oxide layers ubiquitously existing on the surface of Cu NWs impede good inter-wire contact. Commonly used methods such as thermal annealing and acid treatment often lead to nanowire damage. Herein, hydrogen plasma treatment at room temperature has been demonstrated to be effective for simultaneous surface cleaning and selective welding of Cu NWs at junctions. Transparent electrodes with excellent optical-electrical performance （19 ff）-sq-1 @ 90% T） and enhanced stability have been fabricated and integrated into organic solar cells. Besides, Cu NW conductors with superior stretchability and cycling stability under stretching speeds of up to 400 mm-min-＇ can also be produced by the nanowelding process, and the feasibility of their application in stretchable LED circuits has been demonstrated.

关键词： plasma nanowelding transparent electrode stretchable conductor organic solar cell

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Gel-tape-casting of aluminum nitride ceramics

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Journal of Advanced ceramics 2017年第1期6卷 67-72页

作者： Qiushun SHANG Zhengjuan WANG Jun LI Guohong ZHOU Hailong ZHANG Shiwei WANG state key laboratory of high performance ceramics and superfine microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China University of Chinese Academy of Sciences Beijing 100049 China state key laboratory of high performance ceramics and superfine microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

Aluminum nitride ceramic sheets were formed for the first time by a novel and simple method,namely gel-tape-casting process,where only two additives were used to prepare the *** (a water-soluble copolymer of isobutylene and maleic anhydride) acted as both dispersant and gelling agent,and PEG (polyethylene glycol) acted as *** the advantages of gel-casting and tape-casting processes,flexible and uniform green tapes were *** rheological properties of AlN slurries were studied to optimize the PIBM content and solids *** drying and debinding,the green sheets were sintered at 1840 ℃ in N2 *** microstructure with average grain size of about 7 μm was observed in the final AlN *** conductivity of the AlN ceramics was 161 W/(m·K).

关键词： AlN ceramic sheets gel-tape-casting PIBM rheological properties microstructure

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