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坚韧、弹性的氟化固体电解质界面稳定碳酸酯电解质中的锂金属

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Science China Materials 2024年第5期67卷 1403-1411页

作者：孔佳侯添壹石婷李剑波邓鑫李顶根黄云辉许恒辉 State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan430074China

锂金属负极和碳酸酯类电解液之间不稳定的界面是限制高比能锂金属电池循环寿命的关键挑战.本文使用含苯环的双酚A乙氧基化物二甲基丙烯酸酯(BAED)交联剂调节聚(丙烯酸六氟丁酯)(PHFBA),设计了一种弹性人造固体电解质中间相(RASEI)来解... 详细信息

锂金属负极和碳酸酯类电解液之间不稳定的界面是限制高比能锂金属电池循环寿命的关键挑战.本文使用含苯环的双酚A乙氧基化物二甲基丙烯酸酯(BAED)交联剂调节聚(丙烯酸六氟丁酯)(PHFBA),设计了一种弹性人造固体电解质中间相(RASEI)来解决这个问题.刚性BAED分子可以对柔性PHBA基体进行调控,实现从600%伸长率到90%压缩率的卓越回弹性,并具有超过2 MPa的高杨氏模量.RASEI可以适应锂金属较大的体积变化,并确保电池运行过程中锂金属与RASEI之间的紧密接触,促进均匀的锂沉积并减少副反应.因此,经过RASEI修饰的Li‖Li对称电池可以在1 mA cm^(-2)和1 mAh cm^(-2)下实现超过500小时的长期循环.对循环后锂金属进行测试分析表明锂枝晶的生长得到了有效的抑制.此外,搭配20 mg cm^(-2)高阴极负载的NCM811软包电池在1 C下,经过200次循环后容量保持率超过85%.

关键词： lithium metal anode carbonate electrolytes resilient ASEI high cathode loading

间二氟苯稀释剂稳定电极界面助力低温锂金属电池

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储能科学与技术 2024年第7期13卷 2124-2130页

作者：廖世接魏颖黄云辉胡仁宗许恒辉华中科技大学湖北武汉430074 华南理工大学广东广州510641

锂离子电池凭借其能量密度高、输出电压高、循环寿命长等优点而广泛应用于各大领域,然而其在低温应用场景下电化学性能较差,严重限制了其应用。本文采用不同氟取代位置的氟取代苯作为稀释剂,制备了在室温和低温均具有优异循环性能的低... 详细信息

锂离子电池凭借其能量密度高、输出电压高、循环寿命长等优点而广泛应用于各大领域,然而其在低温应用场景下电化学性能较差,严重限制了其应用。本文采用不同氟取代位置的氟取代苯作为稀释剂,制备了在室温和低温均具有优异循环性能的低温电解液。结果表明,间二氟苯作为低温电解液的稀释剂制备的低温电解液(13DFB)在-20℃的电导率为1.252 m S/cm,同时具有5.2 V的宽电化学窗口。间二氟苯稀释剂有效抑制SEI中的Li_(2)CO_(3)的形成,且对Li Ni_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NCM 622)正极颗粒有显著的保护作用。在-20℃和4.4 V截止电压下,采用改性低温电解液组装的Li/NCM622的软包电池可稳定循环200圈,容量保持率为92.8%。本工作提出的方法简单有效,可提升电解液的低温性能,并展示了其在实际中应用的潜力。

关键词：锂离子电池低温电解液间二氟苯稀释剂

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面向新材料强国战略的新能源材料与器件课程教学改革与实践

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中国现代教育装备 2024年第13期 107-109,128页

作者：许恒辉李真黄云辉华中科技大学材料科学与工程学院湖北武汉430074

在新材料强国战略背景下,探讨面向新能源材料与器件课程的教学改革举措。针对现阶段存在的知识体系零散、实践培养欠缺、教学模式单一的问题,提出了优化课程内容、支持企业宣讲的方案,同时倡导以赛促学、发展“以学代教”的第二课堂教... 详细信息

在新材料强国战略背景下,探讨面向新能源材料与器件课程的教学改革举措。针对现阶段存在的知识体系零散、实践培养欠缺、教学模式单一的问题,提出了优化课程内容、支持企业宣讲的方案,同时倡导以赛促学、发展“以学代教”的第二课堂教学、加强实践为主的第三课堂教学和改进考核方式等方法进一步提高教学效果。课程教学改革旨在让学生充分掌握新能源材料的专业知识,为国家培养实践型、创新型高水平人才。

关键词：材料强国新能源材料与器件课程与实践教学改革

Bifunctional LiI additive for poly(ethylene oxide)electrolyte with high ionic conductivity and stable interfacial chemistry

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Journal of Energy Chemistry 2022年第8期31卷 218-224,I0007页

作者： Haonan Wang Tianyi Hou Hang Cheng Bowen Jiang henghui xu Yunhui Huang School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430000HubeiChina

The development of polymer-based solid-state batteries is severely limited by the low ionic conductivity of solid polymer electrolyte and the instable interface between polymer electrolyte and Li-metal *** this work,lithium iodide(LiI)as a bifunctional additive was introduced into the poly(ethylene oxide)(PEO)-based electrolyte to improve the ionic conductivity and to construct a stable interphase at the Li/PEO interface.I-anions offer a strong electrostatic interaction with hydrogen atoms on PEO chains(HPEO)and forming massive I–H bonds that cross-link PEO chains,decrease crystallinity of PEO,and thus improve Li~+interchain *** addition,LiI participates in the formation of an inorganic-rich interphase layer,which decreases the energy barrier of Li+transport across the interface and thus inhibits the growth of lithium *** a result,the composite PEO electrolyte with 2 wt%LiI(PEO-2 LiI)presents a very high ionic conductivity of 2.1×10^(-4) S cm-1 and a critical current density of 2.0 m A cm^(-2) at 45°*** symmetric cell with this PEO-2 LiI electrolyte exhibits a long-term cyclability over 600 h at 0.2 m A cm^(-2).Furthermore,solid-state LiFePO_(4) and LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2) batteries with the PEO-2 LiI electrolyte show an impressive electrochemical performance with outstanding cycling stability and rate capability at 45°C.

关键词： Solid-state battery LiI Electrostatic interaction Crystallinity Interface

Electronegativity-Induced Single-Ion Conducting Polymer Electrolyte for Solid-State Lithium Batteries

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Energy & Environmental Materials 2023年第4期6卷 40-48页

作者： Tianyi Hou Yumin Qian Dinggen Li Bo xu Zhenyu Huang xueting Liu Haonan Wang Bowen Jiang henghui xu Yunhui Huang State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement Ministry of EducationSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China Jiangsu Jitri-Hust Intelligent Equipment Technology Nanjing 210000China

The application of solid polymer electrolytes(SPEs)is severely impeded by the insufficient ionic conductivity and low Li^(+)transference numbers(t_(Li)^(+)).Here,we report an iodine-driven strategy to address both the two longstanding issues of SPEs *** lodine-containing groups introduced on polymer chains effectively attract Li^(+)ions,facilitate Li^(+)transport,and promote the dissociation of Li ***,iodine is also favorable to alleviate the strong O-Li^(+)coordination through a Lewis acidbase interaction,further improving the ionic conductivity and t_(Li)^(+).As a proof of concept,an iodinated single-ion conducting polymer electrolyte(IPE)demonstrates a high ionic conductivity of 0.93 mS cm^(-1)and a high t_(Li)^(+)of 0.86 at 25℃,which is among the best results ever reported for ***,symmetric Li/Li cells with IPE achieve a long-term stability over 2600 h through the in-situ formed LiF-rich *** a result,Li-S battery with IPE maintains a high capacity of 623.7 mAh g^(-1)over 300 cycles with an average Coulombic efficiency of 99%.When matched with intercalation cathode chemistries,Li/IPE/LiFePO_(4)and Li/IPE/LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)solid-state batteries also deliver high-capacity retentions of 95%and 97%at 0.2 C after 120 cycles,respectively.

关键词： iodine lithium polymer electrolytes single-ion conducting solid-state batteries

Interdisciplinary research of materials and energy in honor of Nobel laureate John ***

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Interdisciplinary Materials 2022年第3期1卷 321-322页

作者： Yunhui Huang Liqiang Mai henghui xu Ya You State Key Laboratory of Material Processing and Die and Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubeiChina School of Materials Science and Engineering Wuhan University of TechnologyWuhanHubeiChina

As we know,Prof John *** discovered almost all the commercial cathode materials,LiCoO_(2),LiMn_(2)O_(4),and LiFePO_(4),for lithium-ion batteries(LIBs).Nowadays,LIBs have been extensively used in our daily life,which provide power for mobile phones,laptop computers,electric vehicles,energy storage systems,and so *** discovery of LIBs is believed as one of the most important inventions in the 20th ***,he won the Nobel prize in chemistry in 2019 together with *** Whittingham and Akira *** pioneering contributions have created a rechargeable world for our modern society.

关键词： enough energy lithium

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植物生长调节剂对苦瓜嫁接苗生长的影响

中国蔬菜 2024年第5期 115-122页

作者：周秦郭子卿徐诚徐恒辉张旭升杨爱怡苏正刚邵雷周万管郑涛朱璞金华市农业科学研究院浙江金华321000 金华金麦田种业有限公司浙江金华321000 金华市经济特产技术推广站浙江金华321000 嘉兴市农业科学研究院嘉善农业科学研究所浙江嘉兴314100

为了防止苦瓜嫁接苗徒长,以苦瓜品种碧月为接穗,丝瓜品种双依为砧木,研究了二氢卟吩铁、缩节胺、氧化亚铁等3种植物生长调节剂对砧木幼苗及苦瓜嫁接苗生物学性状的影响,并采用隶属函数法对种苗质量进行综合评价。结果表明,3种植物生长... 详细信息

为了防止苦瓜嫁接苗徒长,以苦瓜品种碧月为接穗,丝瓜品种双依为砧木,研究了二氢卟吩铁、缩节胺、氧化亚铁等3种植物生长调节剂对砧木幼苗及苦瓜嫁接苗生物学性状的影响,并采用隶属函数法对种苗质量进行综合评价。结果表明,3种植物生长调节剂不同浓度处理对砧木幼苗和苦瓜嫁接苗的生物学性状影响差异较大。其中,0.12 mg·L^(-1)二氢卟吩铁浸种处理的砧木幼苗隶属函数值最高,0.07 mg·L^(-1)二氢卟吩铁浸种处理的苦瓜嫁接苗隶属函数值最高。由此可见,0.07~0.12 mg·L^(-1)二氢卟吩铁浸种处理可有效提高砧木幼苗质量,并改善苦瓜嫁接苗质量。

关键词：苦瓜嫁接苗植物生长调节剂隶属函数法

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不同品种(系)甘薯加工油炸薯片比较试验

粮食科技与经济 2024年第2期49卷 113-116页

作者：蒋梅巧张良钟子毓徐恒辉藤长荣程林润金华市农业科学研究院浙江金华321000 金华金麦田种业有限公司浙江金华321000 金华一片尚食品有限公司浙江金华321000

薯片是一种老少咸宜的休闲食品,风味独特。为筛选最适宜金华地区常温油炸的甘薯品种(品系),提升油炸薯片质量,选择当地种植推广面积较大的金薯926、浙薯75、金徐薯22等13个甘薯品种(系)进行了油炸薯片加工比较试验,对比分析不同甘薯品种... 详细信息

薯片是一种老少咸宜的休闲食品,风味独特。为筛选最适宜金华地区常温油炸的甘薯品种(品系),提升油炸薯片质量,选择当地种植推广面积较大的金薯926、浙薯75、金徐薯22等13个甘薯品种(系)进行了油炸薯片加工比较试验,对比分析不同甘薯品种(系)加工的油炸薯片的干率、得率及食味评价数据等。试验结果表明:金薯926、金徐薯23、金徐薯67、浙薯255、浙薯726加工的油炸薯片的颜色、光泽、甜度、脆度等综合性状表现较优,适宜油炸薯片加工。

关键词：甘薯品种油炸薯片食味品质

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Unveiling metabolic flux changes during acute cold exposure

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Frigid Zone Medicine 2023年第4期3卷 193-195页

作者： Pingping Tang henghui xu Yong Zhang Department of Pharmacology(State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular ResearchMinistry of Education)College of PharmacyHarbin Medical UniversityHarbin 150081China State Key Laboratory of Frigid Zone Cardiovascular Diseases(SKLFZCD) Harbin 150081China Research Unit of Noninfectious Chronic Diseases in Frigid Zone Chinese Academy of Medical Sciences2019RU070Harbin 150081China Institute of Metabolic Disease Heilongjiang Academy of Medical ScienceHarbin 150081China

Controlling energy expenditure during acute cold exposure is a fundamental aspect of metabolic dynamics in ***,prior studies on cold-induced thermogenesis faced limitations,primarily focusing on brown adipose tissue(BAT)and lacking precise in vivo flux *** editorial aims to highlight the recent research by Bornstein et *** a comprehensive and quantitative insight into the intricate alterations in metabolic flux that drive this phenomenon[1].

关键词： precise primarily limitations