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Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： Jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi Tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong Xin Wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and functional Materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Lithium-sulfur batteries Staged dendrite suppression Shuttle effect Surface-negatively-charged nanodiamond

Nanoparticles for the treatment of spinal cord injury

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Neural Regeneration Research 2025年第6期20卷 1665-1680页

作者： Qiwei Yang Di Lu Jiuping Wu Fuming Liang Huayi Wang Junjie Yang Ganggang Zhang Chen Wang Yanlian Yang Ling Zhu Xinzhi Sun Department of Orthopedic Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijingChina University of Chinese Academy of Sciences BeijingChina Department of Neurosurgery The First Affiliated Hospital of Chongqing Medical UniversityChongqingChina

Spinal cord injuries lead to significant loss of motor, sensory, and autonomic functions, presenting major challenges in neural regeneration. Achieving effective therapeutic concentrations at injury sites has been a slow process, partly due to the difficulty of delivering drugs effectively. Nanoparticles, with their targeted delivery capabilities, biocompatibility, and enhanced bioavailability over conventional drugs, are garnering attention for spinal cord injury treatment. This review explores the current mechanisms and shortcomings of existing treatments, highlighting the benefits and progress of nanoparticle-based approaches. We detail nanoparticle delivery methods for spinal cord injury, including local and intravenous injections, oral delivery, and biomaterial-assisted implantation, alongside strategies such as drug loading and surface modification. The discussion extends to how nanoparticles aid in reducing oxidative stress, dampening inflammation, fostering neural regeneration, and promoting angiogenesis. We summarize the use of various types of nanoparticles for treating spinal cord injuries, including metallic, polymeric, protein-based, inorganic non-metallic, and lipid nanoparticles. We also discuss the challenges faced, such as biosafety, effectiveness in humans, precise dosage control, standardization of production and characterization, immune responses, and targeted delivery in vivo. Additionally, we explore future directions, such as improving biosafety, standardizing manufacturing and characterization processes, and advancing human trials. Nanoparticles have shown considerable progress in targeted delivery and enhancing treatment efficacy for spinal cord injuries, presenting significant potential for clinical use and drug development.

关键词： antioxidants axon regeneration biocompatible materials drug carriers nanoparticles nerve regeneration neuroinflammatory diseases neuroprotection spinal cord injury stem cells

Developing new understanding of photoelectrochemical water splitting via in-situ techniques:A review on recent progress

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Green Energy & Environment 2017年第2期2卷 100-111页

作者： Jiajie Cen Qiyuan Wu Mingzhao Liu Alexander Orlov Department of Materials and Science Engineering Stony Brook University center for functional nanomaterials Brookhaven National Laboratory

Photoelectrochemical(PEC) water splitting is a promising technology for solar hydrogen production to build a sustainable, renewable and clean energy economy. Given the complexity of the PEC water splitting processes, it is important to note that developing in-situ techniques for studying PEC water splitting presents a formidable challenge. This review is aimed at highlighting advantages and disadvantages of each technique, while offering a pathway of potentially combining several techniques to address different aspects of interfacial processes in PEC water splitting. We reviewed recent progress in various techniques and approaches utilized to study PEC water splitting, focusing on spectroscopic and scanning-probe methods.

关键词： In-situ Water splitting IMPS TAS SPM

Structural design for electrocatalytic water splitting to realize industrial-scale deployment: Strategies, advances, and perspectives

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Journal of Energy Chemistry 2022年第7期31卷 129-153,I0004页

作者： Xianwei Fu Ruijuan Shi Shilong Jiao Mengmeng Li Qiuye Li Engineering Research center for nanomaterials National&Local Joint Engineering Research Center for Applied Technology of Hybrid NanomaterialsHenan UniversityKaifeng 475004HenanChina Key Lab for Special functional Materials of Ministry of Education Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityHenan UniversityKaifeng 475004HenanChina

The green hydrogen generation powered by renewable electricity promises the potential decarbonization of the hard-to-abate sector and is essential for the fulfillment of the Paris Agreement that attempts to limit the global average temperature rise in the range of 1.5–2.0 ℃ above the pre-industrial level by the end of this century. Tremendous efforts have been devoted to the optimization of the electrocatalytic performance of the catalysts under industrial-relevant current densities via rational structure design,which induces a preferential electron distribution that favors the adsorption/desorption behavior of the key intermediates, thus accelerating the reaction kinetics. In this review, a brief introduction of the current energy status will be first presented to necessitate the importance of green *** by the basic concepts and fundamental understanding of the reaction mechanisms, we present efficient strategies for the enhancement of the electrocatalytic performance of the catalysts to meet the rigorous requirement under industrial conditions and the in-depth understanding behind the reinforcement will be briefly discussed next. Then the recent advances regarding the rational design of electrocatalysts operating at an industrial scale will be summarized. Finally, the challenges and perspectives in this thriving field will be proposed from our point of view.

关键词： Overall water splitting Industrial-scale current density Structural design Hydrogen evolution reaction Oxygen evolution reaction

Addressing dynamic photovoltaic processes at electrode:active layer and donor:acceptor interfaces in organic solar cells under device-operating conditions

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Science China Chemistry 2015年第2期58卷 239-247页

作者： Yu-Che Hsiao Ting Wu Huidong Zang Mingxing Li Bin Hu Institute of Optoelectronic Technology Beijing Jiaotong University Department of Materials Science and Engineering University of Tennessee center for functional nanomaterials Brookhaven National Laboratory

This article presents our experimental studies to unravel the dynamic photovoltaic processes occurring at donor:acceptor(D:A)and electrode:active layer(E:A)interfaces under device-operating conditions by using two unique magneto-optical measurements,namely photo-induced capacitance and magnetic field effect ***,we have found that a higher surface polarization of dielectric thin film can decrease the surface charge accumulation at E:A *** photo-induced capacitance results indicate that dielectric thin film plays a crucial role in the charge collection in generating photocurrent in organic solar ***,our experimental results from magnetic field effect show that the binding energies of charge transfer(CT)states at D:A interface can be evaluated by using the critical bias required to completely dissociate the CT *** is the first experimental demonstration that the binding energies of CT states can be measured under deviceoperating ***,we use our measurement of magnetic field effect to investigate the most popular organic photovoltaic solar cells,organometal halide perovskite photovoltaic *** results of magneto-photoluminescence show that the photogenerated electrons and holes are inevitably recombined into electron–hole pairs through a spin-dependent process in the ***,using spin polarizations can present a new design to control the photovoltaic loss in perovskites-based photovoltaic ***,we found that introducing D:A interface can largely affect the bulk charge dissociation and recombination in perovskite solar *** indicates that the interfacial and bulk photovoltaic processes are internally coupled in developing photovoltaic actions in perovskite ***,these magneto-optical measurements show a great potential to unravel the deeper photovoltaic processes occurring at D:A and E:A interfaces in both organic bulk-heterojunction and perovskite solar cells under dev

关键词： electrode interface donor-acceptor interface dielectric layer charge transfer states

Synthesis of water-soluble Cu nanoparticles and evaluation of their tribological properties and thermal conductivity as a water-based additive

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Friction 2019年第3期7卷 246-259页

作者： Junhua ZHAO Guangbin YANG Chunli ZHANG Yujuan ZHANG Shengmao ZHANG Pingyu ZHANG Engineering Research center for nanomaterials Henan University

Efficient and sustainable use of water-based lubricants is essential for energy ***,the use of water-lubricated mechanical systems instead of conventional oil lubricants is extremely attractive from the viewpoint of resource *** this study,water-soluble Cu nanoparticles of size approximately 3 nm were prepared at room temperature(around 25 °C) via in-situ surface *** tribological behavior of the as-synthesized Cu nanoparticles as an additive in distilled water was evaluated using a universal *** results show that the as-synthesized Cu nanoparticles,as a water-based lubricant additive,can significantly improve the tribological properties of distilled *** particular,the lowest friction coefficient of 0.06 was obtained via lubrication with a concentration of 0.6 wt% of Cu nanoparticles in distilled water,which is a reduction of 80.6% compared with that obtained via lubrication with distilled water *** is considered that some Cu nanoparticles entered the contact area of the friction pairs to form a complex lubricating film and prevent direct contact of the friction ***,some Cu nanoparticles in the solution accelerate the heat transfer process,which also results in good tribological properties.

关键词： Cu nanoparticles water-soluble lubricant additive tribological properties

晶格畸变增强卤化锑晶体团簇的自陷激子发射（英文）

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Science China Materials 2025年第1期 132-140页

作者：刘达何敬敬孙玉婷刘心翊彭玉李庆杨化桂牛强杨双侯宇 Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and Engineering East China University of Science and Technology China National Enterprise Technology center Inner Mongolia Erdos Electric Power and Metallurgy Group Company Limited

零维钙钛矿材料以自陷激子引起的宽带发射为特征,是一种很有前途的刺激响应和光加密材料.然而,现有的研究主要集中在结构相变对光物理性质的影响上,对自陷激子的发射机制缺乏深入了解.本文证明了零维卤化锑单晶中的脱水反应,在不诱导结...

零维钙钛矿材料以自陷激子引起的宽带发射为特征,是一种很有前途的刺激响应和光加密材料.然而,现有的研究主要集中在结构相变对光物理性质的影响上,对自陷激子的发射机制缺乏深入了解.本文证明了零维卤化锑单晶中的脱水反应,在不诱导结构相变的基础上显著增强了自陷激子的发射,导致光致发光量子产率从3.5%大幅提高到91.4%.利用原位X射线衍射和光致发光技术揭示了晶体结构和光致发光强度之间的定性关系,证明了在脱水过程中引入了丰富的晶格畸变.温度依赖的荧光光谱和瞬态吸收光谱表明,晶格畸变导致中等的电子-声子耦合强度和更高的激子结合能,加速了自陷激子从非辐射复合单重态弛豫到辐射复合三重态,进而表现出增强的光致发光.作为概念验证,在防伪、可重写发光纸和湿度传感等多重场景中实现了应用.这一发现阐明了自陷激子的发射机制,并为设计可切换发光材料提供了一条新途径.

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Aquathermolysis of heavy crude oil with ferric oleate catalyst

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Petroleum Science 2018年第3期15卷 613-624页

作者： Yun-Rui Li Qiu-Ye Li Xiao-Dong Wang Lai-Gui Yu Jian-Jun Yang Engineering Research center for nanomaterials Henan University

Oil-soluble catalysts could be of special significance for reducing the viscosity of heavy crude oil, because of their good dispersion in crude oil and high catalytic efficiency toward aquathermolysis. Ferric oleate was synthesized and applied as catalyst in the aquathermolysis reaction of Shengli heavy oil. It was found that ferric oleate was more efficient for heavy oil cracking than Co and Ni oleates. Besides, it was superior to oleic acid and inorganic ferric nitrate and achieved the highest viscosity reduction rate of up to 86.1%. In addition, the changes in the components of Shengli heavy oil before and after aquathermolysis were investigated by elemental analysis, Fourier transform infrared spectrometry, and ^1H nuclear magnetic resonance spectroscopy. Results indicated that ferric oleate contributed to a significant increase in the content of light components and decrease in the content of resin, N and S. The as-prepared ferric oleate showed good activity for reducing the viscosity and improving the quality of the heavy crude oil, showing promising application potential in aquathermolysis of heavy crude oil.

关键词： Heavy oil Viscosity reduction Aquathermolysis Ferric oleate Catalyst

Broadband achromatic dielectric metalenses

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Light(Science & Applications) 2018年第1期7卷 236-246页

作者： Sajan Shrestha Adam C.Overvig Ming Lu Aaron Stein Nanfang Yu Department of Applied Physics and Applied Mathematics Columbia UniversityNew YorkNY 10027USA Brookhaven National Laboratory Center for Functional NanomaterialsUptonNY 11973USA

Metasurfaces offer a unique platform to precisely control optical wavefronts and enable the realization of flat lenses,or metalenses,which have the potential to substantially reduce the size and complexity of imaging systems and to realize new imaging ***,it is a major challenge to create achromatic metalenses that produce a single focal length over a broad wavelength range because of the difficulty in simultaneously engineering phase profiles at distinct wavelengths on a single *** practical applications,there is a further challenge to create broadband achromatic metalenses that work in the transmission mode for incident light waves with any arbitrary polarization *** developed a design methodology and created libraries of meta-units—building blocks of metasurfaces—with complex cross-sectional geometries to provide diverse phase dispersions(phase as a function of wavelength),which is crucial for creating broadband achromatic *** elucidated the fundamental limitations of achromatic metalens performance by deriving mathematical equations that govern the tradeoffs between phase dispersion and achievable lens parameters,including the lens diameter,numerical aperture(NA),and bandwidth of achromatic *** experimentally demonstrated several dielectric achromatic metalenses reaching the fundamental *** metalenses work in the transmission mode with polarization-independent focusing efficiencies up to 50%and continuously provide a near-constant focal length over λ=1200–1650 *** unprecedented properties represent a major advance compared to the state of the art and a major step toward practical implementations of metalenses.

关键词： chromatic dielectric limitations