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Experimental study of dual nano-network, high-temperature resistant aerogel material as an integration of thermal management functions

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Journal of Energy Chemistry 2025年第1期 157-170页

作者： Yueyue Xiao Tianke Mao Zun Zhao Yuelei pan Heping Zhang Xudong Cheng State Key Laboratory of Fire Science University of Science and Technology of China

Thermal management system is highly desirable to guarantee the performance and thermal safety of lithium-ion batteries,but it reduces the energy density of battery modules and even is unable to provide highly effective ***,a thermal management function integrated material is presented based on high-temperature resistant aerogel and phase change material and is applied at both charge–discharge process and thermal runaway *** this sandwich structure Paraffin@SiC nanowire/Aerogel sheet （denoted as PA@SAS） system,SiC nanowires endow the middle aerogel sheet （SAS） a dual nano-network *** enhanced mechanical properties of SAS were studied by compressive tests and dynamic mechanical ***,the thermal conductivity of SAS at 600°C is only 0.042 W/（m K）.The surface phase change material layers facilitate temperature uniformity of batteries （surface temperature difference less than 1.82°C） through latent ***,a large-format battery module with four 58 Ah LiNi0.5Co0.2Mn0.3O2LIBs was ***@SAS successfully prevents thermal runaway propagation,yielding a temperature gap of 602°C through the 2 mm-thick cross ***@SAS also exhibits excellent performance in other safety issues such as temperature rise rate,flame heat flux,*** lightweight property and effective insulation performance achieves significant safety enhancement with mass and volume energy density reduction of only 0.79%and 5.4%,*** originality of the present research stems from the micro and macro structure design of the proposed thermal management material and the combination of intrinsic advantages of every *** work provides a reliable design of achieving the integration of thermal management functions into an aerogel composite and improves the thermal safety of lithium-ion batteries.

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压应力激活SOST/Wnt/β-catenin 通路诱导软骨终板细胞退变

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中国组织工程研究 2025年第5期29卷 951-957页

作者：项攀车艳军罗宗平苏州大学附属第一医院骨科研究所江苏省苏州市215006 南京医科大学附属苏州医院骨科与运动医学中心江苏省苏州市215000

背景:在许多可以导致椎间盘退变的因素中(衰老、营养匮乏、机械因素等),力学负荷被认为是极其重要的因素,但其机制尚不清楚。目的:探讨硬骨素和Wnt/β-catenin信号通路在压应力诱导终板软骨退变中的作用。方法:提取4周龄雄性SD大鼠软骨... 详细信息

背景:在许多可以导致椎间盘退变的因素中(衰老、营养匮乏、机械因素等),力学负荷被认为是极其重要的因素,但其机制尚不清楚。目的:探讨硬骨素和Wnt/β-catenin信号通路在压应力诱导终板软骨退变中的作用。方法:提取4周龄雄性SD大鼠软骨终板细胞,体外利用力学加载仪器对终板软骨细胞施加压应力,于压缩细胞1,3,5,7 d,采用CCK-8法测定细胞活力;Western blot、RT-qPCR及细胞免疫荧光等检查终板软骨细胞内软骨标记物(聚集蛋白聚糖、Ⅱ型胶原)、钙化相关因子(Runx2、骨钙素)、细胞外基质降解酶及信号通路基因(硬骨素、β-catenin)等表达。结果与结论:①压应力作用下,终板软骨细胞活力会随着压应力时间、强度增加而降低;②终板软骨细胞的软骨标记物(聚集蛋白聚糖、Ⅱ型胶原)表达下降,而钙化相关因子(Runx2、骨钙素)表达上升;③压应力能促进终板软骨细胞的细胞外基质降解,基质金属蛋白酶3、基质金属蛋白酶13表达量增加;④细胞内Wnt/β-catenin信号通路表达出现异常,其特异性抑制因子硬骨素伴随着β-catenin的异常积累而表达下降。结果说明:在压应力作用下,终板软骨细胞内硬骨素的表达下降,导致Wnt/β-catenin信号通路激活,促进软骨终板的钙化、退变与细胞外基质的降解,进而促进椎间盘退变。

关键词：软骨终板软骨细胞 SOST Wnt/β-catenin 压应力椎间盘退变

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Unveiling the promotion role of ZnO on Zn-Al spinel oxide for CO2 hydrogenation

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Journal of Energy Chemistry 2025年第1期 18-25页

作者： Tongyao Wang Xinlong Yao Lixin Liang Hongyu Chen pan Gao Guangjin Hou State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences

The Zn-Al spinel oxide stands out as one of the most active catalysts for high-temperature methanol synthesis from CO2hydrogenation. However, the structure–activity relationship of the reaction remains poorly understood due to challenges in atomic-level structural characterizations and analysis of reaction intermediates. In this study, we prepared two Zn-Al spinel oxide catalysts via coprecipitation（ZnAl-C）and hydrothermal（ZnAl-H） methods, and conducted a comparative investigation in the CO2hydrogenation reaction. Surprisingly, under similar conditions, ZnAl-C exhibited significantly higher selectivity towards methanol and DME compared to ZnAl-H. Comprehensive characterizations using X-ray diffraction（XRD）, Raman spectroscopy and electron paramagnetic resonance（EPR） unveiled that ZnAl-C catalyst had abundant ZnO species on its surface, and the interaction between the ZnO species and its ZnAl spinel oxide matrix led to the formation of oxygen vacancies, which are crucial for CO2adsorption and activation. Additionally, state-of-the-art solid-state nuclear magnetic resonance（NMR） techniques,including ex-situ and in-situ NMR analyses, confirmed that the surface ZnO facilitates the formation of unique highly reactive interfacial formate species, which was readily hydrogenated to methanol and DME. These insights elucidate the promotion effects of ZnO on the ZnAl spinel oxide in regulating active sites and reactive intermediates for CO2-to-methanol hydrogenation reaction, which is further evidenced by the significant enhancement in methanol and DME selectivity observed upon loading ZnO onto the ZnAl-H catalyst. These molecular-level mechanism understandings reinforce the idea of optimizing the ZnO-ZnAl interface through tailored synthesis methods to achieve activity-selectivity balance.

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Uncertainty Principles on Clifford Modules

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Acta Mathematica Sinica,English Series 2024年第10期40卷 2537-2570页

作者： pan LIAN School of Mathematical Sciences Tianjin Normal UniversityTianjin 300387P.R.China

In this paper,we derive the optimal Cauchy–Schwarz inequalities on a class of Hilbert and Krein modules over a Clifford algebra,which heavily depend on the Clifford algebraic *** obtained inequalities further lead to very general uncertainty inequalities on these *** new phenomena arise,due to the non-commutative nature,the Clifford-valued inner products and the Krein *** into account applications,special attention is given to the Dirac operator and the Howe dual pair Pin(m)×osp(1|2).Moreover,it is surprisingly to find that the recent highly nontrivial uncertainty relation for triple observables is indeed a direct consequence of our Cauchy–Schwarz *** new observation leads to refined uncertainty relations in terms of the Wigner–Yanase–Dyson skew information for mixed states and other *** show that the obtained uncertainty inequalities on Clifford modules can be considered as new uncertainty relations for multiple observables.

关键词： Clifford algebra uncertainty principle Krein space Fischer decomposition Wigner-Yanase-Dyson skew information

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Decoupling effect and driving factors of carbon footprint in megacity Wuhan,Central China

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Ecological Processes 2023年第1期12卷 330-343页

作者： Gao pan Xinhang Li Deng pan Wensheng Liu College of Life Science and Technology Central South University of Forestry and TechnologyChangsha 410004People’s Republic of China Central South Academy of Inventory and Planning of NFGA Changsha 410014People’s Republic of China

Background China’s 35 largest cities,including Wuhan,are inhabited by approximately 18%of the Chinese popula-tion,and account for 40%energy consumption and greenhouse gas *** is the only sub-provincial city in Central China and,as the eighth largest economy nationwide,has experienced a notable increase in energy ***,major knowledge gaps exist in understanding the nexus of economic development and carbon footprint and their drivers in *** We studied Wuhan for the evolutionary characteristics of its carbon footprint(CF),the decoupling relation-ship between economic development and CF,and the essential drivers of *** on the CF model,we quantified the dynamic trends of CF,carbon carrying capacity,carbon deficit,and carbon deficit pressure index from 2001 to *** also adopted a decoupling model to clarify the coupled dynamics among total CF,its accounts,and eco-nomic *** used the partial least squares method to analyze the influencing factors of Wuhan’s CF and determine the main *** The CF of Wuhan increased from 36.01 million t CO_(2)eq in 2001 to 70.07 million t CO_(2)eq in 2020,a growth rate of 94.61%,which was much faster than that of the carbon carrying *** energy consumption account(84.15%)far exceeded other accounts,and was mostly contributed by raw coal,coke,and crude *** carbon deficit pressure index fluctuated in the range of 8.44-6.74%,indicating that Wuhan was in the relief zone and the mild enhancement zone during *** the same time,Wuhan was in a transition stage between weak and strong CF decoupling and economic *** main driving factor of CF growth was the urban per capita residen-tial building area,while energy consumption per unit of GDP was responsible for the CF *** Our research highlights the interaction of urban ecological and economic systems,and that Wuhan’s CF changes were mainly affected by four factors:city size,economic developm

关键词： Carbon footprint Economic development Decoupling analysis Partial least squares analysis Megacity

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Hermitian-Poisson Metrics on Flat Bundles over Complete Hermitian Manifolds

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Chinese Annals of Mathematics,Series B 2021年第4期42卷 575-582页

作者： Changpeng pan School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026China

In this paper,the author solves the Dirichlet problem for Hermitian-Poisson metric equation√(-1)Λ_(ω)G_(H)=λId and proves the existence of Hermitian-Poisson metrics on flat bundles over a class of complete Hermiti... 详细信息

关键词： Flat bundle Hermitian harmonic metric Hermitian-poisson metric Complete Hermitian manifolds

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Progress of the Quantum Experiment Science Satellite(QUESS) Micius Project

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空间科学学报 2018年第5期38卷 604-609页

作者： pan Jianwei Department of Modern Physics and Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei 230026 CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Shanghai 201315

By using satellites, ultra-long-distance quantum communication and tests of quantum foundations could be achieved at a global scale. The Quantum Experiment Science Satellite(QUESS) in China, also called Micius, one of the scientific satellite programs in the Strategic Priority Program on space science, the Chinese Academy of Sciences, was launched on 16 August 2016. There are totally 4 scientific payloads. We give a brief overview of the quantum experiment science satellite project and present most recent science results. The main scientific goal of the quantum experiment science satellite was achieved in 2017. Here, we introduce the latest achievements in satellite-based quantum communication and large-scale tests of quantum foundations obtained by Micius.

关键词：科学卫星实验科学卫星工程中国科学院优先级测试通讯基础

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Estimating the power spectrum of a discrete cosmic momentum field with fast Fourier transform

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Research in Astronomy and Astrophysics 2020年第9期20卷 253-267页

作者： Jun pan National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

Fast Fourier transform based estimators are formulated for measuring momentum power spectra,including the auto power spectra of the momentum,the momentum divergence,and the cross spectrum of density fluctuation and momentum *** using the third order Bettle-Lemariéscaling function to assign discrete objects to regular grids for fast Fourier transform are proposed to clean alias *** experiments prove that the implementation can achieve sub-percent precision till close to the Nyquist *** impact of removing bulk flow on the estimation of momentum power spectra is derived theoretically and verified *** bulk flow has little effects at large scales but might induce meaningful differences in nonlinear regime,and probably it is not necessary to subtract bulk flow for samples which peculiar velocities are exact or sufficiently *** power spectra of dark matter samples from N-body simulation are measured and *** expected,the prediction of the one loop Eulerian perturbation theory agrees with simulation only slightly better than the linear theory at z=0,but can be applied to higher redshift with improved *** of simulation data and the one loop Eulerian theory both reveal that the momentum field contains strong rotational part,and there is a large stochastic component in the divergence of momentum which is not correlated with the density *** three kinds of momentum power spectra have their own characteristics.

关键词： large scale structure of Universe cosmology:theory methods:numerical methods:statistical

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CALCULATION OF ELECTROCHEMICAL OVERPOTENTIAL AND CONCENTRATION OVERPOTENTIAL BASED ON CURVE OF ANODIC POLARIZATION IN HYDROGEN STORAGE ALLOY ELECTRODE

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中国有色金属学会会刊：英文版 1999年第2期9卷 56-60页

作者： pan, Hongge Zhejiang Univ Hangzhou China

１ＩＮＴＲＯＤＵＣＴＩＯＮＭｅｔａｌｈｙｄｒｉｄｅｓｈａｖｅｂｅｅｎｕｓｅｄａｓｎｅｇａｔｉｖｅｅｌｅｃｔｒｏｄｅｓｏｆｎｉｃｋｅｌ／ｍｅｔａｌｈｙｄｒｉｄｅｂａｔｅｒｉｅｓｉｎｐｌａｃｅｏｆｃａｄｍｉｕｍ，ｂｅｃａ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＭｅｔａｌｈｙｄｒｉｄｅｓｈａｖｅｂｅｅｎｕｓｅｄａｓｎｅｇａｔｉｖｅｅｌｅｃｔｒｏｄｅｓｏｆｎｉｃｋｅｌ／ｍｅｔａｌｈｙｄｒｉｄｅｂａｔｅｒｉｅｓｉｎｐｌａｃｅｏｆｃａｄｍｉｕｍ，ｂｅｃａｕｓｅｏｆｔｈｅｉｒｈｉｇｈｅｎｅ...

关键词： electrochemical overpotentialconcentration overpotentialanodic polarizationhydrogen storage alloy

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Recent advances in self-propelled particles

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Science China Chemistry 2017年第10期60卷 1293-1304页

作者： Qi pan Yan He Department of Chemistry Tsinghua University Beijing 100084 China

"Active" components can be introduced into a passive system to completely change its physical behavior from its typical behavior at thermodynamic equilibrium. To reveal the interaction mechanisms between individuals, researchers have designed unique self-propelled particles to mimic the collective behavior of biological systems. This review focuses on recent theoretical and experimental advances in the study of self-propelled particle systems and their individual and collective behaviors. The potential applications of active particles in chemical, biological and environmental sensing and single particle imaging are discussed.

关键词： self-propelled particles micromotors collective behavior single particle tracking

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