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Polybenzimidazolium-reinforced polyimide separators to inhibit dendrites for high-security lithium-ion batteries

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Science China Chemistry 2025年

作者： Guohua Sun Jiaqi Cui Qingsong zhang Yisong Zhou Xinluo li Yingying zhang zhanao zhang Xin zhang Jiantao Fan Pengpeng li lianlong Hou Nanjun chen Hebei Key Laboratory of Flexible Functional Materials School of Materials Science and Engineering Hebei University of Science and Technology State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University

lithium dendrite formation poses a significant safety hazard in lithium-ion batteries（liBs）, severely impeding their widespread adoption and further technological advancements. Here, we present a novel quaternized polybenzimidazolium（q-PBI） to armor polyimide（PI） nanofiber separator（q-PBI@PI）, in which the q-PBI containing lithiophilicity and anionphilicity sites serves as the multifunctional nano-layers to suppress the li dendrite and reinforce the mechanical properties of PI nanofiber ***, the q-PBI@PI separator displays an unprecedented mechanical strength of 82.8 MPa, significantly outperforming previously reported PI nanofiber membranes（typically below 50.0 MPa）. Besides, we demonstrate that the q-PBI@PI separator simultaneously possesses low nucleation overpotential（59 mV） and exceptional average coulombic efficiency due to the suppression of li dendrite. Importantly, q-PBI@PI-based li||li battery enables a stable li plating-stripping at 1.0 m A cm-2for600 h. Attributing to these exceptional merits, the armored PI separator-based liBs display remarkable specific capability and capacity retention. The density function theory calculations reveal that q-PBI is conducive to the desolvation of li+and can immobilize li+and PF6-ions near affinity sites of PI nanofibers for inhibiting the formation of li dendrites. Our work paves a new avenue for the design of next-generation high-performing separators in liBs.

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High-precision magnetic field measurement system based on a coherent population trapping magnetometer onboard the SATech-01 satellite

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Science China Technological Sciences 2025年

作者： Hongbo XUE Wei SONG Haoran ZHAO Yiteng zhanG Shanzhi YE Jindong WANG Ran TAO Peng SANG Keli chen Xingzi BI Bingjun chenG Bin ZHOU Yongliang XUE Yingying TANG liu liU Jinsong li Xiaocheng ZHU Baoquan li Jinguo liU Wen chen Xiaofeng zhanG Yonghe zhanG Lei li State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Key Laboratory of Solar Activity and Space Weather National Space Science Center Chinese Academy of Sciences Key Laboratory of Electronics and Information Technology for Space Systems National Space Science Center Chinese Academy of Sciences State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Innovation Academy for Microsatellites Chinese Academy of Sciences

On July 27, 2022, a high-precision system for measuring the magnetic field based on a coherent population trapping magnetometer（referred to as the CPT system） was launched onboard the Space Advanced Technology demonstration satellite（SATech-01） by a ZK-1A rocket. The payload comprises a scalar coherent population trapping magnetometer（CPTM）, triaxial anisotropic magnetoresistance magnetometer（AMRM）, and nano star tracker mounted on a non-magnetic telescopic tubular mast. This configuration enables synchronized measurement of scalar and vector geomagnetic fields, as well as the attitude,making the payload with its compact sensors suitable for applications on miniature satellite platforms. On November 7, 2022,the novel telescopic tubular mast was deployed in orbit, extending to a length of 5.28 m. The CPTM, an absolute scalar magnetometer with an omnidirectional sensor, is the first China-developed quantum/atomic magnetometer successfully operating in space. In orbit, the CPTM has sensitivity of ～10 pT/Hz1/2and can automatically operate under complex magnetic field variations. The difference between the scalar fields obtained using the CPTM and CHAOS model has a mean deviation of–3.73 n T and a standard deviation of 26.11 nT（1σ）, without on-orbit calibration or correction. The miniaturized AMRM has a sensitivity of ～0.3 n T/Hz1/2and maintains stable and reliable operation in orbit. The low-power and miniaturized nano star tracker has a measurement uncertainty of 14.23″（1σ） in orbit. The mission has realized the on-orbit technical verification of the integrated and synchronized detection of the vector magnetic field and attitude and fully validated the system's performance,automation level, and reliability.

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无机陶瓷膜超滤精制连花清瘟颗粒的工艺研究

时珍国医国药 2010年第1期21卷 166-168页

作者：魏学君陈占立孙长荣范文成石润波石家庄以岭药业股份有限公司河北石家庄050038

目的在无机陶瓷膜精制连花清瘟颗粒过程中，考察不同孔径的膜对该体系的适用性，并进行膜过程优化设计。方法以连花清瘟水提液为研究对象，测定了3种不同孔径膜及不同操作参数下对膜通量及有效成分含量的变化。结果50nm膜的膜通量最大... 详细信息

目的在无机陶瓷膜精制连花清瘟颗粒过程中，考察不同孔径的膜对该体系的适用性，并进行膜过程优化设计。方法以连花清瘟水提液为研究对象，测定了3种不同孔径膜及不同操作参数下对膜通量及有效成分含量的变化。结果50nm膜的膜通量最大，甘草酸及绿原酸转移率最高，最佳大生产过滤条件为操作压差为0．08～0．12MPa，过滤温度50—60℃，膜面流速3．0m/s；当过滤液浓缩到原液体积1／10时，加入相同体积的水，有效成分转移率达80％以上，即可结束过滤。采用强酸、强碱交替清洗，膜通量可恢复99％以上。结论采用无机陶瓷膜超滤技术精制连花清瘟颗粒是可行的，并为陶瓷膜分离技术应用于其它中药水提液的精制提供了依据。

关键词：连花清瘟颗粒陶瓷膜超滤精制分离技术

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太钢18吨氩氧炉精炼不锈钢工艺过程统计分析

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钢铁研究总院学报 1985年第4期 471-479页

作者：陈壮夫詹平李吉夫俞元亮

本文应用计算机技术,对太钢18吨氩氧炉精炼不锈钢的工艺过程进行了统计分析,研究了氩氧炉工艺参数的特性、钢水温度和化学成分的变化规律,建立了一系列数学模型,同时对工艺参数成分和温度等进行了相关分析,全面评价了工艺的优劣和操作水... 详细信息

本文应用计算机技术,对太钢18吨氩氧炉精炼不锈钢的工艺过程进行了统计分析,研究了氩氧炉工艺参数的特性、钢水温度和化学成分的变化规律,建立了一系列数学模型,同时对工艺参数成分和温度等进行了相关分析,全面评价了工艺的优劣和操作水平,研究结果表明:目前所采用的工艺基本上是合理的;操作是稳定的;温度和成分的控制达到了规程的要求。氧单耗的数学模型在实际生产中得到了初步的应用。

关键词：统计分析数学模型工艺过程工艺参数相关分析钢水温度化学成分氧化期脱碳速度相关系数

Skeletal muscle-specific Bambi deletion induces hypertrophy and oxidative switching coupling with adipocyte thermogenesis against metabolic disorders

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Science China life Sciences 2025年

作者： Xiangping Yao Xudong Mai Ye Tian Yifan liu Guanghui Jin Ze li Shujie chen Xiaoshuang Dai liujing Huang Zijing Fan Guihua Pan Xiaohan Pan Xiangmin li Michael C Yu Jia Sun Jingxing Ou Hong chen liwei Xie College of life and Health Sciences Guangdong Industry Polytechnic Department of Endocrinology and Metabolism Zhujiang Hospital Southern Medical University State Key Laboratory of Applied Microbiology Southern China Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application Guangdong Open Laboratory of Applied MicrobiologyInstitute of Microbiology Guangdong Academy of Sciences Institute of Aging Research Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics School of Medical Technology Guangdong Medical University Department of Hepatic Surgery and liver transplantation Center of the Third Affiliated Hospital Organ Transplantation Institute Sun Yat-sen University Organ Transplantation Research Center of Guangdong ProvinceGuangdong province engineering laboratory for transplantation medicine Guangdong Provincial Key Laboratory of Liver Disease Research School of Public Health Xinxiang Medical University BGI Institute of Applied Agriculture BGI-Shenzhen Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Department of Biological Sciences State University of New York at Buffalo Department of Internal Medicine Shunde Women and Children's Hospital (Maternity and Child Healthcare Hospital of Shunde Foshan) Guangdong Medical University

Skeletal muscle plays a significant role in both local and systemic energy metabolism. The current investigation aims to explore the role of the Bambi gene in skeletal muscle, focusing on its implications for muscle hypertrophy and systemic metabolism. We hypothesize that skeletal muscle-specific deletion of Bambi induces muscle hypertrophy, improves metabolic performance, and activates thermogenic adipocytes via the reprogramming of progenitor of i WAT, offering potential therapeutic strategies for metabolic syndromes. Leveraging the Chromatin immunoprecipitation(ChIP)-seq and bioinformatics analysis, Bambi gene is shown to be a direct target of HIF2α, which is further confirmed by ChIP-qPCR and promoter luciferase assay. Skeletal muscle-specific Bambi deletion led to significant muscle hypertrophy and improved metabolic parameters, even under high-fat diet conditions. This deletion induced metabolic reprogramming of stromal vascular fractions(SVFs) into thermogenic adipocytes, contributing to systemic metabolic improvements, potentially through the secretory ***, mice with skeletal muscle-specific Bambi deletion demonstrate resistance to high-fat diet-induced metabolic disorders, highlighting a potential therapeutic pathway for metabolic syndrome management. Thus, skeletal muscle-specific deletion of Bambi triggers muscle growth, enhances metabolic performance, and activates thermogenic adipocytes. These findings suggest Bambi as a novel therapeutic target for metabolic syndromes, providing new insights into the interaction between muscle hypertrophy and systemic metabolic improvement. The study underscores the potential of manipulating muscle physiology to regulate whole-body metabolism, offering a novel perspective on treating metabolic disorders.

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Multiarm Star Poly(ε-caprolactone) with Hyperbranched Polyamidoamine as Core Capable of Selective Accommodating Cationic or Anionic Guests

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Chinese Journal of Polymer Science 2015年第6期33卷 920-930页

作者： chen zhan Si li Jin Cui 陈宇 Department of Chemistry School of SciencesTianjin Universityand Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) National Foodstuff Inspection Center Tianjin Product Quality Inspection Technology Research Institute

Hyperbranched polyamidoamines （HPAs） were directly employed as macroinitiators to initiate the Sn（Oct）2 catalyzed ring-opening polymerization of ε-caprolactone （CL）, resulting in multiarm star copolymers with poly（6- caprolactone）（PCL） as shells and HPA as core （HPA-b-PCL）. From 1H-NMR characterization it was deduced that both the primary amines and the secondary amide groups of HPAs could initiate the CL polymerization, and the initiation efficiency increased when more CL monomers were fed. The average arm-numbers of the obtained stars were in the range of 115-353. Differential scanning calorimetry measurements demonstrated that the melting and crystallization temperatures, fusion and crystallization enthalpy and the degree of crystallinity of the star polymers increased as the PCL arm length increased. HPA- b-PCL stars could be used as nanocarriers to efficiently accommodate anionic dyes at acidic condition, while load cationic dyes at basic condition. Compared with the dye-loading behavior of multiarrn star PCL with the neutral hyperbranched polyglycerol as core, it was deduced that HPA-b-PCL nanocarriers accommodated anionic dyes using the HPA core, while loaded cationic dyes using both the HPA core and the PCL shell. Dynamic light scattering analyses also supported such deduction. Furthermore, HPA-b-PCL nanocarriers could selectively load the anionic Eosin Y or the cationic methylene blue from their mixture at pH = 6 or 9, respectively, realizing their separation.

关键词： Nanocarrier Hyperbranched Polyamidoamine Poly(ε-caprolactone) Star polymers.

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Self-assembled carbon monoxide nanoprodrug for chemiexcitationtriggered synergistic chemotherapy against breast cancer

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Science China Chemistry 2025年

作者： Shunfei Cui Yiyao Pan chenzhe Ma Bin Qi Qingqiang Min Ming li Huabing chen Hengte Ke Xingyue Ji Jiangsu Province Engineering Research Center of Precision Diagnostics and Therapeutics Development College of Pharmaceutical ScienceSoochow University

Carbon monoxide（CO） has recently been well-established as a promising therapeutic modality against cancer. The development of transition-metal-free and tumor-targeted delivery platforms for CO is highly demanded but remains very sporadic. Herein, we developed a polyprodrug system for the co-delivery of CO and a chemotherapeutic agent combretastin A-4（CA-4） to the tumor site based on a chemiexcitation mechanism. Such a poly-prodrug successfully achieved the co-activation of CO and CA-4 in response to H2O2at the tumor site both in vitro and in vivo. Importantly, a synergist effect between CO and CA-4 was observed in suppressing tumor growth in a mouse tumor model. It is anticipated that such a poly-prodrug system could be potentially adapted for the co-delivery of CO and another drug payload for combinational therapy for other indications.

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Rational design of lipid-activatable NIR-II probes for precisely imaging atherosclerotic plaque

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Science China Chemistry 2025年

作者： Xinyu Xu Yuan Ma Hui Cao li Xu Haoming chen Sulai liu Wei Sun Guosheng Song Xiaobing zhang State Key Laboratory for Chemo/Bio-Sensing and Chemometrics College of Chemistry and Chemical EngineeringHunan University Department of Hepatobiliary Surgery/Central Laboratory Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University) Department of Cardiology the First Affiliated Hospital of Nanjing Medical University Key Laboratory of Targeted Intervention of Cardiovascular Disease Collaborative Innovation Center for Cardiovascular Disease Translational MedicineNanjing Medical University Shenzhen Research Institute of Hunan University

Atherosclerosis(AS) is a prevalent condition associated with cardiovascular and cerebrovascular diseases, featuring lipid-laden plaque; however, the insufficient resolution and low sensitivity of traditional medical imaging techniques limit their application in lipid imaging. Currently, the second near-infrared(NIR-II) fluorescence imaging offers promising sensitivity and convenience. However, existing probes have limitations in terms of signal-to-background ratio, penetration depth, and tissue scattering. Herein, we use a molecular regulatory strategy to design a lipid-activatable probe Rh-965 with high specificity and NIR-II emission for improved imaging potential in deep tissues. The potential of Rh-965 for imaging plaque lipids in mice with AS is demonstrated by localizing carotid artery plaques using NIR-II imaging. The development of more stable lipid-activated NIR-II probes can significantly enhance atherosclerosis diagnosis and facilitate in vivo imaging in deeper tissues.

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Recent progress on photoactive nonprecious transition-metal complexes

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Science China Chemistry 2025年第1期68卷 46-95页

作者： Zhong-liang Gong Hong-Jie zhang Yan cheng Jianxun liu Yuhan Ai Yaqin li Zhihui Feng Qiong zhang Shaolong Gong Yong chen Chang-Jiang Yao Yuan-Yuan Zhu liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical Engineering Beijing Institute of Technology College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University School of Chemistry and Chemical Engineering Anhui University Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Photoactive complexes of nonprecious transition metals, mainly including those in the first-row and partially the second-row of the Periodic table of elements, have received increasing attention in view of their low cost and long-term sustainability. They are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices, artificial photosynthesis, photocatalysis, biodiagnostics, and therapeutics, etc. This review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes, including photoactive Zr, V, Cr, Mo, and W complexes, Mn complexes and hybrids, Fe, Co, Ni, and Cu complexes, and Zn and Cd complexes and hybrids. A particular focus is given on the molecular design, modulation of photophysical and photochemical properties, and applications of the representative and lately-developed nonprecious metal complexes. In addition, a perspective on the future development in this field is provided at the end of this review.

关键词： photoactive metal complexes earth-abundant metals nonprecious metal complexes luminescence photochemistry