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Gradient‑Layered MXene/Hollow Lignin Nanospheres Architecture Design for Flexible and Stretchable Supercapacitors

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Nano-Micro Letters 2025年第2期17卷 447-462页

作者： Haonan Zhang cheng Hao Tongtong Fu Dian Yu Jane Howe Kaiwen Chen Ning Yan Hao Ren Huamin Zhai Jiangsu Provincial Key Lab of Sustainable Pulp and Paper Technology and Biomass Materials NanJing Forestry UniversityNanjing 210037People’s Republic of China Department of Chemical Engineering and Applied Chemistry University of Toronto200 College StreetTorontoON M5S 3E5Canada Department of Materials Science and Engineering University of Toronto184 College StreetTorontoON M5S 3E4Canada College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037People’s Republic of China

With the rapid development of flexible wearable electronics,the demand for stretchable energy storage devices has *** this work,a novel gradient-layered architecture was design based on single-pore hollow lignin nanospheres(HLNPs)-intercalated two-dimensional transition metal carbide(Ti_(3)C_(2)T_(x) MXene)for fabricating highly stretchable and durable *** depositing and inserting HLNPs in the MXene layers with a bottom-up decreasing gradient,a multilayered porous MXene structure with smooth ion channels was constructed by reducing the overstacking of MXene ***,the micro-chamber architecture of thin-walled lignin nanospheres effectively extended the contact area between lignin and MXene to improve ion and electron accessibility,thus better utilizing the pseudocapacitive property of *** these strategies effectively enhanced the capacitive performance of the *** addition,HLNPs,which acted as a protective phase for MXene layer,enhanced mechanical properties of the wrinkled stretchable electrodes by releasing stress through slip and deformation during the stretch-release cycling and greatly improved the structural integrity and capacitive stability of the *** electrodes and symmetric flexible all-solid-state supercapacitors capable of enduring 600%uniaxial tensile strain were developed with high specific capacitances of 1273 mF cm^(−2)(241 F g^(−1))and 514 mF cm^(−2)(95 F g^(−1)),***,their capacitances were well preserved after 1000 times of 600%stretch-release *** study showcased new possibilities of incorporating biobased lignin nanospheres in energy storage devices to fabricate stretchable devices leveraging synergies among various two-dimensional nanomaterials.

关键词： Hollow lignin nanospheres MXene Gradient-layered architecture Wrinkled electrodes Stretchable supercapacitors

Novel approach for active vibration control of a flexible missile

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Defence Technology（防务技术） 2020年第4期16卷 956-967页

作者： cheng-long Pan Ji-li Rong Tian-fu Xu Da-lin xiang School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Norinco Group Aviation Ammunition Research Institute Harbin 150030China Beijing Institute of Astronautical Systems Engineering Beijing 100076China

This paper investigates the feasibility of using an active dynamic vibration absorber(ADVA) for active vibration control of a flexible missile system through *** on the principles of a dynamic vibration absorber(DVA),a ring-type ADVA is first designed to attenuate the elastic vibration of the flexible missile,and the design of the active controller adopts the proportional-integral-derivative(PID)control *** motion equations of a flexible missile with an ADVA,which is subjected to follower thrust at its aft end,are derived using the Lagrangian *** the minimum of the root mean square(RMS) of the lateral displacement response of the center of mass as the objective function,a genetic algorithm(GA) is used to optimize the parameter of the DVA and PID *** numerical calculations show that the ADVA and DVA are effective in suppressing the vibration and provide approximately 41.2% and 17.6% improvement,respectively,compa red with the case of no DVA,The ADVA has better performance than the DVA,When the missile is subjected to follower thrust,the effect of vibration reduction is more effective than the case without follower *** is feasible to reduce vibration and improve the stability of flexible missiles by means of the ADVA.

关键词： Flexible missile PID controller Active dynamic vibration absorber Genetic algorithms

The Year-scale X-Ray Variations in the Core of M87

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Research in Astronomy and Astrophysics 2023年第6期23卷 203-211页

作者： Yu-lin cheng Fei xiang Heng Yu Shu-Mei Jia xiang-Hua Li cheng-Kui Li Yong Chen Wen-cheng Feng Department of Astronomy Yunnan UniversityKunming 650091China Department of Astronomy Beijing Normal UniversityBeijing 100875China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Physics and Institute of Theoretical Physics Nanjing Normal UniversityNanjing 210023China

The analysis of light variation of M87 can help us understand the disk *** the past decade,M87 has experienced several short-term light variabilities related to *** also find that there are year-scale X-ray variations in the core of *** light variability properties are similar to *** re-analyzing 56Chandra observations from 2007 to 2019,we distinguish the“non-flaring state”from“flaring state”in the light *** removing flaring state data,we identify four gas clumps in the nucleus and all of them can be well fitted by the clumpy-ADAF *** average mass accretion rate is~0.16M⊙yr^(-1).We analyze the photon index(Γ)-flux(2-10 keV)correlation between the non-flaring state and flaring *** the non-flaring states,the flux is inversely proportional to the photon *** the flaring states,we find no obvious correlation between the two *** addition,we find that the flare always occurs at a high mass accretion rate,and after the luminosity of the flare reaches the peak,it will be accompanied by a sudden decrease in *** results can be explained as that the energy released by magnetic reconnection destroys the structure of the accretion disk,thus the luminosity decreases rapidly and returns to normal levels thereafter.

关键词： X-rays:galaxies galaxies:clusters:individual(M87) accretion accretion disks

UAV Communication Channel Measurement, Modeling, and Application

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Journal of Communications and Information Networks 2019年第4期4卷 32-43页

作者： xiang cheng Yiran Li lin Bai State Key Laboratory of Advanced Optical Communication Systems and Networks Department of ElectronicsSchool of Electronics Engineering and Computer SciencePeking UniversityBeijing 100871China Shenzhen Research Institute of Big Data Shenzhen 518000China School of Cyber Science and Technology Beihang UniversityBeijing 100191China

As unmanned aerial vehicles(UAV)deploy-ment is shifting from military to civilian sectors,and in particular as a means of facilitating more flexible and versatile wireless communications,the UAV channels that were previously not well understood are attracting increasing research and *** the key component facilitating the UAV-aided communications,UAV channel characteristics and modeling are of critical importance to the designed UAV system to achieve satisfactory *** this article,we will provide a comprehensive overview and the future perspective of envisioned UAV communication system benefits,the existing and needed UAV channel measurements and modeling approaches,together with the new viewpoint of UAV channel applications in different communication and networking *** existing work and future directions are extensively covered.

关键词： UAV channel measurements modeling application future challenges

Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang Zhang Danyang Wu linke Cai Youluan Lu Fanpeng cheng Lijuan Shi Qun Yi Yao Liu Yi Huang Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of Education College of Chemistry Central China Normal University College of Materials Science and Engineering Fuzhou University

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction（OER）. Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER process. However, most of them undergo incomplete reconstruction with limited thickness of reconstruction layer, leading to low component utilization and arduous exploration of real catalytic mechanism. Herein, we identify the dynamic behaviors in complete reconstruction of Co-based complexes during OER. The hollow phytic acid（PA） cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability, in favor of the fast and complete reconstruction. A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co（Fe）(OH)xand subsequent potential-driven oxidation to Co（Fe）OOH. The obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm-2and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER activity. The work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： Oxygen evolution reaction

Ionizable polymeric nanocarriers for the codelivery of bi-adjuvant and neoantigens in combination tumor immunotherapy

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Bioactive Materials 2023年第8期26卷 169-180页

作者： Ting Su xiang Liu Shuibin lin Furong cheng Guizhi Zhu Center for Translational Medicine Precision Medicine InstituteThe First Affiliated HospitalSun Yat-sen UniversityGuangzhou510080China Department of Pharmaceutics and Center for Pharmaceutical Engineering and Sciences Institute for Structural Biology and Drug DiscoverySchool of PharmacyThe Developmental Therapeutics ProgramMassey Cancer CenterVirginia Commonwealth UniversityRichmondVA23298USA

Ionizable lipid nanocarriers have made historical contribution to COVID-19 mRNA ***,we report ionizable polymeric nanoparticles that co-deliver bi-adjuvant and neoantigen peptides for cancer immunotherapy in combination with immune checkpoint blockade(ICB).Current cancer ICB benefits only a small subset of patients,largely due to a lack of pre-existing target cells and checkpoint targets for ICB,tumor antigenic heterogeneity,and tumor *** vaccines hold the potential to enhance ICB therapeutic efficacy by expanding antitumor cell repertoires,upregulating immune checkpoint levels and hence sensitizing ICB,and reducing tumor *** defined peptide vaccines are attractive,but their current therapeutic efficacy has been limited due to 1)poor vaccine delivery to immunomodulatory lymph nodes(LNs)and antigen(Ag)-presenting cells(APCs),2)poor immunostimulant adjuvant efficacy with restricted target cell subsets in humans,3)limited adjuvant/Ag codelivery to enhance Ag immunogenicity,and 4)limited ability to overcome tumor antigenic ***,we developed nanovaccines(NVs)using pH-responsive polymeric micellular nanoparticles(NPs)for the codelivery of bi-adjuvant[Toll-like receptor(TLR)7/8 agonist R848 and TLR9 agonist CpG]and peptide neoantigens(neoAgs)to draining LNs for efficient Ag presentation in a broad range of APC *** NVs potentiated the immunogenicity of peptide Ags and elicits robust antitumor T cell responses with memory,and remodeled the tumor immune milium with reduced tumor *** a result,NVs significantly enhanced ICB therapeutic efficacy for murine colorectal tumors and orthotopic glioblastoma multiforme(GBM).These results suggest marked potential of bi-adjuvant/neoAg-codelivering NVs for combination cancer immunotherapy.

关键词： Polymeric nanoparticles Combination adjuvants Cancer neoantigen Nanovaccine codelivery Cancer immunotherapy

In situ observation of austenite grain growth behavior in the simulated coarse-grained heat-affected zone of Ti-microalloyed steels

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International Journal of Minerals,Metallurgy and Materials 2014年第9期21卷 878-885页

作者： xiang-liang Wan Kai-ming Wu Gang Huang Ran Wei lin cheng The State Key Laboratory of Refractories and Metallurgy Hubei Collaborative Innovation Center for Advanced Steels Wuhan University of Science and Technology

The austenite grain growth behavior in a simulated coarse-grained heat-affected zone during thermal cycling was investigated via in situ observation. Austenite grains nucleated at ferrite grain boundaries and then grew in different directions through movement of grain boundaries into the ferrite phase. Subsequently, the adjacent austenite grains impinged against each other during the α→γtransformation. After the α→γ transformation, austenite grains coarsened via the coalescence of small grains and via boundary migration between grains. The growth process of austenite grains was a continuous process during heating, isothermal holding, and cooling in simulated thermal cycling. Abundant finely dispersed nanoscale TiN particles in a steel specimen containing 0.012wt% Ti effectively retarded the grain boundary migration, which resulted in refined austenite grains. When the Ti concentration in the steel was increased, the number of TiN particles de- creased and their size coarsened. The big particles were not effective in pinning the austenite grain boundary movement and resulted in coarse austenite grains.

关键词： alloy steel austenite grain growth heat-affected zone coarsening titanium nitride

An Unprecedented Efficiency with Approaching 21%Enabled by Additive‑Assisted Layer‑by‑Layer Processing in Organic Solar Cells

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Nano-Micro Letters 2025年第2期17卷 372-375页

作者： Shuai Xu Youdi Zhang Yanna Sun Pei cheng Zhaoyang Yao Ning Li Long Ye Lijian Zuo Ke Gao Key Laboratory of Advanced Green Functional Materials College of ChemistryChangchun Normal UniversityChangchun 130032People’s Republic of China Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion School of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237People’s Republic of China College of Polymer Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China State Key Laboratory and Institute of Elemento‑Organic Chemistry Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsRenewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071People’s Republic of China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Tianjin Key Laboratory of Molecular Optoelectronic Sciences School of Materials Science and EngineeringTianjin UniversityTianjin 300350People’s Republic of China State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Recently published in Joule,Feng Liu and colleagues from Shanghai Jiaotong University reported a record-breaking 20.8%power conversion efficiency in organic solar cells(OSCs)with an interpenetrating fibril network active layer morphology,featuring a bulk p-in structure and proper vertical segregation achieved through additive-assisted layer-by-layer *** optimized hierarchical gradient fibrillar morphology and optical management synergistically facilitates exciton diffusion,reduces recombination losses,and enhances light capture *** approach not only offers a solution to achieving high-efficiency devices but also demonstrates the potential for commercial applications of OSCs.

关键词： Organic solar cells Additive-assisted layer-by-layer processing Three-dimensional fibril morphology Bulk p-i-n structure Optical management

运动改善多发性硬化症患者生理功能的潜在生物学机制

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中国组织工程研究 2025年第20期29卷 4341-4350页

作者：沈闯蔺松程瑞娟重庆邮电大学体育学院重庆市400065 重庆邮电大学科技处重庆市400065 四川大学华西医院风湿免疫科四川省成都市610041

背景:研究证实运动对多发性硬化症具有潜在的改善作用,但具体机制尚不完全清楚。目的:总结多发性硬化症患者的生理功能变化,探讨运动改善多发性硬化症患者生理功能的机制。方法:应用计算机检索Web of Science、PubMed、中国知网、万方... 详细信息

背景:研究证实运动对多发性硬化症具有潜在的改善作用,但具体机制尚不完全清楚。目的:总结多发性硬化症患者的生理功能变化,探讨运动改善多发性硬化症患者生理功能的机制。方法:应用计算机检索Web of Science、PubMed、中国知网、万方和维普数据库等,中文检索词为“多发性硬化症,脱髓鞘自身免疫疾病,运动,体育锻炼,神经退行性疾病”等,英文检索词为“Multiple sclerosis,Demyelinating Autoimmune Diseases,Exercise,Physical activity,Neurodegenerative diseases”等,文献检索时限为各数据库建库至2024年6月,根据预定的纳入和排除标准,最终筛选出81篇文献进行综述。结果与结论:多发性硬化症患者的生理和功能变化复杂多样,严重影响患者的生活质量和独立生活能力。运动作为一种非药物干预方式,在改善多发性硬化症患者的生理和功能状态方面显示出显著潜力,运动可以缓解疲劳、调节免疫反应、降低压力激素水平、增强血脑屏障功能及促进神经可塑性。然而,当前关于运动治疗多发性硬化症的具体机制研究仍然不足,需要更多高质量、系统性的研究来进一步验证和完善相关结论。未来的研究应聚焦于以下几个方面:进一步探索不同类型和强度运动对多发性硬化症患者生理功能和病情进展的具体影响,找出最适合多发性硬化症患者的运动方案;开展大规模、长期随访的临床试验,验证运动对多发性硬化症患者的长期效果和安全性;结合现代科技手段,如功能性磁共振成像和神经电生理技术,深入揭示运动干预对多发性硬化症患者神经系统的具体作用机制;考虑患者个体差异,制定个性化的运动干预方案,以最大程度地提高干预效果和患者依从性。

关键词：多发性硬化症脱髓鞘自身免疫疾病运动神经退行性疾病生理功能工程化组织构建

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