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High-performance localized high-concentration electrolytes by diluent design for long-cycling lithium metal batteries

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Chinese Chemical Letters 2024年第4期35卷 244-247页

作者： Zhe Wang Li-Peng Hou Qian-Kui Zhang Nan Yao Aibing chen Jia-Qi Huang Xue-Qiang Zhang College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

Electrolyte design is essential for stabilizing lithium metal anodes and localized high-concentration electrolyte(LHCE) is a promising one. However, the state-of-the-art LHCE remains insufficient to ensure long-cycling lithium metal anodes. Herein, regulating the solvation structure of lithium ions in LHCE by weakening the solvating power of diluents is proposed for improving LHCE performance. A diluent,1,1,2,2,3,3,4,4-octafluoro-5-(1,1,2,2-tetrafluoroethoxy) pentane(OFE), with weaker solvating power is introduced to increase the proportion of aggregates(an anion interacts with more than two lithium ions,AGG-n) in electrolyte compared with the commonly used 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether(TTE). The decomposition of AGG-n in OFE-based LHCE intensifies the formation of anion-derived solid electrolyte interphase and improves the uniformity of lithium deposition. Lithium metal batteries with OFE-based LHCE deliver a superior lifespan of 190 cycles compared with 90 cycles of TTE-based LHCE under demanding conditions. Furthermore, a pouch cell with OFE-based LHCE delivers a specific energy of 417 Wh/kg and undergoes 49 cycles. This work provides guidance for designing high-performance electrolytes for lithium metal batteries.

关键词： Lithium metal anodes Electrolyte Diluents Solid electrolyte interphase Pouch cells

Cooperative NHC/Photoredox Catalysis:Three-Component Reaction of Aroyl Fluorides,Styrenes and Oxalates

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Chinese Journal of Chemistry 2024年第5期42卷 511-515页

作者： Zheng Lin Guanghui Lv Jianghong Liu Jiangyan Tang Binsong Mu Jian chen Tianle Huang Zhongzhen Yang Yong Wu Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengduSichuan610041 China Department of Pharmacy Hubei Provincial Clinical Research Center for Umbilical Cord Blood Hematopoietic Stem CellsTaihe HospitalHubei University of MedicineShiyanHubei442000 China

Cooperative NHC/photoredox catalysis has emerged as an important research field in recent ***,this article describes the use of cesium salt derivatives of tert-alcohols as alkyl radical precursors in a three-component reaction with styrene and aromatic acyl fluorides to synthesizeα-arylalkyl aryl *** aroyl fluoride reacts with the NHC catalyst,leading to the formation of an acyl azolium *** acyl azolium ion can then be reduced by the photoredox catalyst,generating the corresponding ketyl radical *** C-radical generated from oxalate oxidation undergoes an addition reaction with the styrene derivative,followed by cross-coupling of the addition radical with the ketone radical,which is fragmented by NHC to give the target ketone.

关键词： Three-component Photoredox NHC Aryl ketones Iridium Radical C—C coupling Amides

Electron-transporting boron-doped polycyclic aromatic hydrocarbons:Facile synthesis and heteroatom doping positions-modulated optoelectronic properties

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Chinese Chemical Letters 2024年第4期35卷 447-451页

作者： Tingting Huang Zhuanlong Ding Hao Liu Ping-An chen Longfeng Zhao Yuanyuan Hu Yifan Yao Kun Yang Zebing Zeng Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China Shenzhen Research Institute of Hunan University Shenzhen 518000China Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education and Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices School of Physics and Electronics Hunan UniversityChangsha 410082China

While heteroatom doping serves as a powerful strategy for devising novel polycyclic aromatic hydrocarbons(PAHs), the further fine-tuning of optoelectronic properties via the precisely altering of doping patterns remains a challenge. Herein, by changing the doping positions of heteroatoms in a diindenopyrene skeleton, we report two isomeric boron, sulfur-embedded PAHs, named Anti-B_(2)S_(2) and Syn-B_(2)S_(2), as electron transporting semiconductors. Detailed structure-property relationship studies revealed that the varied heteroatom positions not only change their physicochemical properties, but also largely affect their solid-state packing modes and Lewis base-triggered photophysical responses. With their low-lying frontier molecular orbital levels, n-type characteristics with electron mobilities up to 1.5 × 10^(-3)cm^(2)V^(-1)s^(-1)were achieved in solution-processed organic field-effect transistors. Our work revealed the critical role of controlling heteroatom doping patterns for designing advanced PAHs.

关键词： Polycyclic aromatic hydrocarbon Optoelectronic properties Heteroatom doping n-Type organic semiconductors Structure–property relationship

进展期非节段型白癜风患者对系统糖皮质激素治疗反应的相关影响因素研究

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中华皮肤科杂志 2024年第1期57卷 17-22页

作者：宣依洁杨奕雯王琛徐中奕项蕾红张成锋复旦大学附属华山医院皮肤科上海200040

目的比较系统糖皮质激素治疗敏感与治疗抵抗的进展期非节段型白癜风患者的临床资料及外周血CXC趋化因子配体(CXCL)9及CXCL10水平,寻找影响系统糖皮质激素治疗敏感性的临床因素.方法2021年5月至2023年5月于复旦大学附属华山医院建立系统... 详细信息

目的比较系统糖皮质激素治疗敏感与治疗抵抗的进展期非节段型白癜风患者的临床资料及外周血CXC趋化因子配体(CXCL)9及CXCL10水平,寻找影响系统糖皮质激素治疗敏感性的临床因素.方法2021年5月至2023年5月于复旦大学附属华山医院建立系统糖皮质激素治疗的进展期非节段型白癜风患者队列,前瞻性收集队列中所有患者的临床资料和外周血样本,给予入组患者标准治疗:复方倍他米松注射液1ml肌内注射每月1次.治疗3个月后,观察患者皮损改善情况,同时采用白癜风面积及严重程度(VASI)评分和白癜风欧洲工作组评估工具(VETFa)评估疗效.VASI评分变化≥0且VETFa进展期评分≤0分为激素敏感组(即病情稳定或好转),而VASI评分变化0.05).结论无或单一特殊临床标记、外用糖皮质激素治疗史、无白癜风家族史、发病部位为四肢近端可能是进展期非节段型白癜风患者对系统糖皮质激素治疗抵抗的危险因素.治疗后CXCL10水平改变可能作为判断进展期白癜风患者是否发生糖皮质激素治疗抵抗的重要评估指标.

关键词：白癜风糖皮质激素类趋化因子CXCL10 系统治疗影响因素

富氮多孔碳纳米片的氮掺杂构型调控及其储锌性能

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化工进展 2024年第5期43卷 2673-2683页

作者：刘思宇杨卷陈培陈祖田闫斌刘育红邱介山西安交通大学化学工程与技术学院北京化工大学化学工程学院

基于多孔碳正极和锌金属负极构建的水性锌离子电容器（ZICs）具有成本低、环境友好、安全性高和长期耐用等优点，近年来受到广泛关注。本文以具有共价有机框架结构（COF）的富氮聚合物为碳源前体，通过简单的炭化自活化策略，合成了富... 详细信息

基于多孔碳正极和锌金属负极构建的水性锌离子电容器（ZICs）具有成本低、环境友好、安全性高和长期耐用等优点，近年来受到广泛关注。本文以具有共价有机框架结构（COF）的富氮聚合物为碳源前体，通过简单的炭化自活化策略，合成了富氮多孔碳纳米片（NPCN-x）。研究表明，基于聚合物前体丰富的COF结构特点，炭化温度对所制备碳材料的氮含量和氮掺杂构型有显著影响，且碳材料表面的吡咯氮含量与其储锌性能呈现高度线性相关。优化后的NPCN-800其吡咯氮原子分数高达2.15%，作为ZICs的正极材料，在0.5A/g的电流密度下，展现出158mAh/g的高比容量和优异的循环稳定性。结合密度泛函理论计算发现，碳材料表面的吡咯氮构型具有优异的电化学活性，能够显著增强Zn离子的化学吸脱附过程。该研究为高性能ZICs用碳基电极材料的设计构建提供了新思路。

关键词：多孔碳纳米片氮掺杂调控锌离子存储电化学优化设计

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基于中尺度天气模型的核爆炸烟云演化模型

武汉大学学报(理学版) 2024年第4期70卷 515-525页

作者：钱玙周晨王翔乔建东李金泽武汉大学电子信息学院湖北大学计算机与信息工程学院

核爆炸是在有限体积内瞬时间释放出大量能量的过程，释放能量很大，杀伤力很强。核爆炸过程中和核爆炸过程后，会产生多种物理效应向远离爆炸点区域传播。核爆炸产生的烟云既会污染空气，又会造成地面大范围的沾染。因此研究核爆炸烟云... 详细信息

核爆炸是在有限体积内瞬时间释放出大量能量的过程，释放能量很大，杀伤力很强。核爆炸过程中和核爆炸过程后，会产生多种物理效应向远离爆炸点区域传播。核爆炸产生的烟云既会污染空气，又会造成地面大范围的沾染。因此研究核爆炸烟云的运动规律是非常必要的。本文开展了对核爆炸烟云的模拟研究，在天气研究和预报模型中加入火球初始化，模拟了不同爆炸当量、不同爆炸高度、不同气象条件的核爆炸产生的烟云的演化过程，从垂直方向和水平方向全面演示，并模拟了流场随时间的变化。模拟实验结果表明，核爆炸产生的烟云演化的过程符合相关理论知识，基本达到实验预期。本研究为了解核爆炸烟云的运动规律提供了依据。

关键词：中尺度天气模型天气研究和预报模型核爆炸烟云演化

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Establishment of microneurovascular units in alginate hydrogel microspheres to reveal the anti-hypoxic effect of salidroside

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Journal of Pharmaceutical Analysis 2024年第6期14卷 926-929页

作者： Shiyu chen Yuxuan Li Yingrui Zhang Hongren Yao Tong Xu Yi Zhang Jin-Ming Lin Xian-Li Meng State Key Laboratory of Southwestern Chinese Medicine Resources Innovative Institute of Chinese Medicine and PharmacyChengdu University of Traditional Chinese MedicineChengdu611137China Beijing Key Laboratory of Microanalytical Methods and Instrumentation Department of ChemistryKey Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology(Ministry of Education)Tsinghua UniversityBeijing100084China School of Ethnic Medicine Chengdu University of Traditional Chinese MedicineChengdu611137China

Microneurovascular units(mNVUs),comprising neurons,micro-glia,and blood-brain barrier(BBB)endothelial cells,are pivotal to the central nervous system and are associated with cerebral hypoxia and brain *** hypoxia triggers microglial overactivity,causing inflammation,neuronal injury,and disruption of the BBB[1].Salidroside(Sal),a key compound in Tibetan medicine Rhodiola crenulata,mitigates hypoxia-induced metabolic disorders and neuronal damage by preserving mitochondrial function[2].

关键词： injuries preserving Tibetan

高等植物捕光叶绿素a/b结合蛋白的研究进展

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农业生物技术学报 2024年第2期32卷 444-457页

作者：钟思彤张亚真孔祥瑞金珊陈志辉陈常颂福建农林大学园艺学院福建省农业科学院茶叶研究所/国家茶树改良中心福建分中心国家土壤质量福安观测实验站

捕光叶绿素a/b结合蛋白(light-harvesting chlorophyll a/b binding protein, CAB)是一类由CAB基因家族编码的膜蛋白，在捕获和传递光能、光保护和过剩能量耗散、调节光能在两个光系统中的分配和维持类囊体膜的结构等方面起着重要作用。... 详细信息

捕光叶绿素a/b结合蛋白(light-harvesting chlorophyll a/b binding protein, CAB)是一类由CAB基因家族编码的膜蛋白，在捕获和传递光能、光保护和过剩能量耗散、调节光能在两个光系统中的分配和维持类囊体膜的结构等方面起着重要作用。CAB基因广泛参与高等植物叶、花和果实的生长发育，以及响应多种逆境胁迫等生物学过程。本文综述了CAB家族的分类、蛋白结构、生理功能和逆境表达特性等方面的研究进展，并展望未来研究方向，以期为深入研究该基因家族提供参考。

关键词：捕光叶绿素a/b结合蛋白(CAB) 蛋白结构生理功能逆境表达

Plasma-assisted aerogel interface engineering enables uniform Zn^(2+)flux and fast desolvation kinetics toward zinc metal batteries

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Journal of Energy Chemistry 2024年第8期95卷 29-38,I0002页

作者： Zijian Xu Zhenhai Shi Zhan Chang Fan Feng Zhuanyi Liu Dongkun Chu Jianguo Ren Zi-Feng Ma Suli chen Tianxi Liu Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material EngineeringJiangnan UniversityWuxi 214122JiangsuChina Shanghai Electrochemical Energy Devices Research Center Department of Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China BTR New Material Group Co. LTD.Shenzhen 518000GuangdongChina

The poor reversibility of Zn anodes induced by dendrite growth,surface passivation,and corrosion,severely hinders the practical applicability of Zn metal *** address these issues,a plasmaassisted aerogel(PAG)interface engineering was proposed as efficient ion transport modulator that can simultaneously regulate uniform Zn^(2+)flux and desolvation behavior during battery *** PAG with ordered mesopores acted as an ion sieve to homogenize Zn deposition and accelerate Zn^(2+)flux,which is favorable for corrosion resistance and dendrite ***,the plasma-assisted aerogel with abundant hydrophilic groups can facilitate the desolvation kinetics of Zn^(2+)due to the multiple hydrogen-bonding interaction with the activated water molecules,thus accelerating the Zn^(2+)migration ***,the Zn/Zn cell assembled with PAG-modified separator demonstrates stable plating and stripping behavior(over 1400 h at 1 mA cm^(-2))and high Coulombic efficiency(99.8%at1 mA cm^(-2)after 1100 cycles),and the Zn‖MnO_(2)full cell shows excellent long-term cycling stability and maintains a high capacity of 154.9 mA h g^(-1)after 1000 cycles at 1 A g^(-1).This study provides a feasible approach for the large-scale fabrication of aerogel functionalized separators to realize ultra-stable Zn metal batteries.

关键词： Zn metal batteries Aerogel interface Plasma Zn^(2+)migration kinetics Dendrite growth