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Sputtered mon nanolayer as a multifunctional polysulfide catalyst for high-performance lithium–sulfur batteries

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eScience 2022年第3期2卷 329-338页

作者： Xin-Yang Yue Jing Zhang Jian Bao Yi-Fan Bai Xun-Lu Li Si-Yu Yang Zheng-Wen Fu Zhen-Hua Wang Yong-Ning Zhou Department of Materials Science Fudan UniversityShanghai200433China Beijing Key Laboratory for Chemical Power Source and Green Catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing100081China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing100084China Department of Chemistry Fudan UniversityShanghai200433China

Two major obstacles for the practical application of lithium–sulfur batteries are sluggish redox kinetics and the shuttle effect of lithium polysulfides(LiPSs).Herein,mon nanolayer-decorated multilayer graphene is fabricated via magnetron sputtering then serves as a multifunctional interlayer in Li–S batteries to suppress the shuttle effect and enhance redox kinetics.It is revealed that after the initial discharge process,the mon layers break up into independent microreaction units consisting of mon bodies and MoS_(2) edges,forming a heterogeneous composite catalyst in situ.The mon bodies not only have high sulfur affinity to trap LiPSs but also enhance their redox kinetics.At the same time,the MoS_(2) edge weakens the mobility of LiPSs via the anchoring effect.As a result,Li–S cells using the interlayer present superior cycling stability under a high sulfur loading of 4.8 mg cm^(-2).This work may open a new avenue for developing high-performance Li–S batteries.

关键词： Li–S batteries Polysulfide Barrier interlayer mon Magnetron sputtering

Depressed female cynomolgus monkeys(Macaca fascicularis) display a higher second-to-fourth(2D:4D)digit ratio

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Zoological Research 2019年第3期40卷 219-225页

作者： Wei Li Ling-Yun Luo Xun Yang Yong He Bin Lian Chao-Hua Qu Qing-Yuan Wu Jian-Guo Zhang Peng Xie Department of Neurology Army Medical Center of PLAChongqing 400042China Institute of Neuroscience Chongqing Medical UniversityChongqing 400016China Chongqing Key Laboratory of Neurobiology of Chongqing Medical University Chongqing 400016China Department of Neurology the Third Affiliated Hospital of Sun Yat-Sen University Yuedong HospitalGuangzhou Guangdong 514700China

This research aimed to provide evidenee of a relationship between digit ratio and depression status in the cynomolgus monkey(Macaca fascicularis).In stable cyno molgus mon key social groups,we selected 15 depressed monkeys based on depressive-like behavioral criteria and 16 normal control mon keys.All animals were video recorded for two weeks,with the duration and frequency of the core depressive behaviors and 58 other behaviors in 12 behavioral categories then evaluated via behavioral analysis.Fin ger len gths from the right and left forelimb hands of both groups were measured by X-ray imagi ng.Fin ger length and digit ratio comparisons between the two groups were con ducted using Stude nt's Mest.In terms of the durati on of each behavior,signifies nt differences emerged in“Huddling”and five other behavioral categories,including Ingestive,Amicable,Parental,Locomotive,and Resting.In addition to the above five behavioral categories,we found that depressed mon keys spent less time in parental and rubbing back and forth behaviors than the control group.Furthermore,the 4th fin gers were significantly Ion ger in the left and right hands in the control group relative to the depressed mon keys.The sec ond?to?fourth(2D:4D)digit ratio in the left and right forelimb hands was significantly lower in the control group tha n that in the depressed group.Our fin dings revealed significant differences in finger lengths and digit ratios between depressed mon keys and healthy controls,which concords with our view that relatively high fetal testosterone exposure may be a protective factor against developing depressive symptoms(or that low fetal testosterone exposure is a risk factor).

关键词： Fin ger length Digit ratio Major depressive disorder Cynomolgus mon key

Pure phase mon: preparation by chemical-diffused permeation and enhanced conductivity with rare earth Gd

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Rare Metals 2015年第2期34卷 137-142页

作者： Xin Li Chao Gao Yu-Zhi Jiang Xi-Kun Li School of Materials Science and Engineering Shenyang Ligong University

mon was prepared by rare earth Gd thermaldiffused permeation method via solid–gas interface reaction using（NH_4）_4[NiMo6O_24H_6]·7H_2O（abbreviated as NiMo6） as the precursor. Thermo-gravimetric differential thermal analysis（TG–DTA） was used to study the product＇s stability. The results of X-ray diffractometer（XRD）and X-ray photoelectron spectroscopy（XPS） indicate that a new hexagonal crystal mon forms after the rare earth gas permeation and Gd3＋are diffused as substitution ions into the crystal lattice of mon, and the surface valence of elemental content was measured by XPS. The conductivity results by direct current（DC） four-probe method show that mon obtained from the Gd thermal permeation exhibits conductor character in the temperature range of 298–740 K and semiconductor behavior in 740–800 K.

关键词： Rare earth permeation mon Conductivity Gd

Highly efficient and selective CO2 electro-reduction with atomic Fe-C-N hybrid coordination on porous carbon nematosphere

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Nano Research 2019年第9期12卷 2318-2323页

作者： Haixia Zhong Fanlu Meng Qi Zhang Kaihua Liu Xinbo Zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute cf Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Automobile Materials Ministry of Education and College of Materials Science and EngineeringJilin UniversityChangchun 130012China

Carbon dioxide reduction(CO2RR)has become a promising way to address the energy and environmental crisis,of which the fundamental development of the optimal electrocatalysts is the crucial part.Herein,we develop Fe and N doping porous carb on n ematosphere(FeNPCN)as an excellent CO2RR electrocatalyst in aqueous electrolyte.Featuring with the high conductivity,pore structure and abundant Fe and N doping,FeNPCN exhibits high catalytic activity with a high faradaic selectivity of CO(94%)and long-term durability.Moreover,the ratio of CO and H2 can be changed by the applied potential for the different syngas related industry.Density functional theory(DFT)calculation results also reveal that the excellent catalytic activity is likely attributed to C and N hybrid coordination with atomic Fe.

关键词： carbon dioxide reducti on electrocatalysis porous carbon carb on mon oxide metal/nitrogen dopi ng

Collision Attacks against AEZ-PRF for Authenticated Encryption AEZ

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China Communications 2018年第2期15卷 46-53页

作者： Tairong Shi Chenhui Jin Jie Guan Information Science and Technology Institute Science Avenue High-Tech Zone Zhengzhou Henan 450001 China

AEZ is an AES-based authenticated encryption submitted to the ongoing CAESAR competition and was presented at Eurocrypt2015 with AEZ v3. There are three models for AEZ, AEZ-core, AEZ-tiny and AEZ-prf. In this paper, we consider the security of AEZprf for AEZ v4.2, the latest version of AEZ.Our major finding is a collision of any 256-bit associated data for AES-prf. Then we launch collision attacks in a quantum setting and a classical setting respectively under different assumptions. In the quantum setting, by Simon's quantum algorithm, we amount a forgery with O(n) quantum superposition queries and an overwhelming probability close to 1.In the classical setting, one with the key of AEZ-prf can also construct the forgeries. Our results show that the AEZ-prf models of AEZ v4.2 is not secure in both the quantum setting and classical world. Furthermore, our results can also be applied to AEZ v3, which has been published on Eurocrypt 2015. As far as we know, no cryptanalysis of AEZ v4.2 has been published so far.

关键词：碰撞攻击加密 AES prf 联系数古典 mon 量算法

Differential attacks on reduced SImon versions with dynamic key-guessing techniques

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Science China(Information Sciences) 2018年第9期61卷 282-284页

作者： Ning WANG Xiaoyun WANG Keting JIA Jingyuan ZHAO Key Laboratory of Cryptologic Technology and Information Security Ministry of EducationShandong University School of Mathematics Shandong University Institute for Advanced Study Tsinghua University Department of Computer Science and Technology Tsinghua University Beijing Research Institute of Telemetry

In 2013,NSA published the specifications of two lightweight block cipher families SImon and SPECK[1].Since the SImon family was announced,it has attracted a lot of attention of the cryptanalysts.In this article,we use... 详细信息

关键词： mon SI Differential attacks on reduced SImon versions with dynamic key-guessing techniques

monsters in the Forbidden City (a set of 18 books)

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China Book International 2023年第1期 114-115页

monsters in the Forbidden City,containing 18 books,is the frst set of fairy tales about the Palace Museum from a child's perspective.The story starts with a magical gem earring picked up by pupil Li Xiaoyu at the Palace Museum.With the magic of the"Cave Light Gem,"Li Xiaoyu heard the talks of the monsters and fairies,who had lived in the Palace Museum for hundreds of years and experienced many breathtaking stories.

关键词： hundreds Forbidden mon

过渡族金属氮化物基复合材料的构建与电化学性能研究

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过渡族金属氮化物基复合材料的构建与电化学性能研究

作者：张明慧河北工业大学

学位级别：硕士

化石资源的日益枯竭及其带来的有害气体排放,使人们更加关注清洁能源的发展。然而,这类能源地域分布不均且无法进行稳定的输出,限制了它们的大规模应用。因此,这类能源的存储与转化研究受到了广泛关注。超级电容器是一种典型的能源存储... 详细信息

化石资源的日益枯竭及其带来的有害气体排放,使人们更加关注清洁能源的发展。然而,这类能源地域分布不均且无法进行稳定的输出,限制了它们的大规模应用。因此,这类能源的存储与转化研究受到了广泛关注。超级电容器是一种典型的能源存储装置,是当前能源材料与器件研究领域的热点之一。过渡金属氮化物(TMNs)具有优异的物理与化学性能,是一种潜在的超级电容器电极材料。本文通过多种实验方式制备了过渡族金属氮化物及其复合材料,并研究其储能性能。内容如下:(1)利用高能球磨-煅烧法制备了FeN/TiCT复合电极材料,并研究了成分和结构对储能性能的影响。通过调控TiCT的含量,使得FeN在TiCT纳米片表面和层间均匀分布。这种结构不仅增大了复合材料的活性表面积,而且两种组分之间的紧密结合有利于FeN和TiCT之间的电荷转移,从而提高了复合材料的电化学储能性能。当电流密度为0.5 A/g时,TF40(60 wt.%FeN/40 wt.%TiCT)电极的质量比电容高达300 F/g。此外,TF40的工作电压窗口高达2 V,还表现出良好的电化学可逆性和循环性能。(2)利用溶液自组装-烧结法制备了氧化石墨烯(GO)/WN复合电极材料,调控复合电极的微观结构,优化了储能性能。通过改变GO水溶液的含量可以调控GO/WN复合电极的微观形貌。制备的GO/WN-4(75 wt.%WN/25 wt.%GO)复合电极具有独特的纳米花状结构,具有更高的比表面积,可以暴露更多的表面活性位点,为表面反应提供了更多的电荷转移路径,从而促进电子与离子快速迁移。在0.5 A/g的电流密度下,GO/WN-4电极的质量比电容达到1316 F/g,比纯WN电极的提高了8.5倍。此外,该电极还具有较小的循环损耗。(3)利用盐模板法制备了mon/WN复合电极,研究了组分对复合电极性能的影响。通过调控mon的含量,mon/WN复合结构的微观形貌发生了改变。制备的mon/WN-3(0.85 M WN/0.15 M mon)复合电极形成了由超薄纳米片交错而成的三维结构,有效地防止了纳米片的堆积。复合结构不仅增大了比表面积,提供了丰富的活性位点,而且增加了整个电极的导电性,促进了电子与离子的快速迁移。mon/WN-3复合电极在0.5 A/g的电流密度下表现出3125 F/g的高质量比电容,还具有良好的电化学可逆性和循环性能。

关键词： Fe2N WN mon 复合材料超级电容器

LATE CENOZOIC RAPID UPLIFT OF THE TIBETAN PLATEAU AND FORMATION OF ASIAN monSOON SYSTEM:EVIDENCE FROM PALEOMAGNETISM AND PALEOBIOLOGY OF RED BED-BOULDER CONGLOMERATE SEQUENCES ALONG THE NORTHERN TIBET PLATEAU

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地学前缘 2000年第S1期7卷 385-386页

作者： Fang Xiaomin, Li Jijun, Zhao Zhijun, Yan Maodu, Ma Yuzhen[WT5,5”BX](Department of Geography, Lanzhou University, Lanzhou 730000, China. Telfax:86\|931\|891 3362 E\|mail:fangxm@***)

Timing of uplift of the Tibetan Plateau is a fundamental work to understand global climatic change and mountain\|building mechanism. Because most of the evidence comes from the Himalaya\|South Tibet, the northern margin of the Plateau may hold the key to unravel a whole view of the Plateau uplift history, in which basin sediments are the most important part because they have continuously recorded the history of pure surface uplift in related mountains. In the whole foredeep bordered by the North Marginal Thrust (Kunlun—Altun—Qilian—Longmen Trusts) along the northern and eastern Tibetan Plateau, thick Cenozoic stratigraphy is widely distributed and records the whole history of the Plateau uplift process. It can be lithologically divided in three large units from top to bottom: light colored sediments, boulder conglomerate and red bed. The red bed is mostly fine sediments of lacustrine and/or fluviolacustrine origins and the boulder conglomerate has been long thought as evidence of rapid uplift of the Tibetan Plateau. The light colored sediments are mostly eolian and/or fluviolacustrine deposits or desert\|gobi sediments. Thus, to date the boulder conglomerate holds the key to unravel the Plateau uplift. We chose the Linxia Basin in the northeastern Tibetan Plateau and Jiuquan Basin in the northern Qilian Mountains as two pilot controlling sites to reconstruct the history of uplift process of the Tibetan Plate au and its accompanied climatic change and to see if a coupling process would ex ist between the uplift of the Plateau and Asian monsoon system.

关键词： rapid uplift Late Cenozoic formation of Asian mon soon system