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Nano-Micro Letters 2024年第9期16卷 397-409页

作者： Zheng Zhang Jingren Gou Kaixuan Cui Xin Zhang Yujian Yao suqing wang Haihui wang Beijing Key Laboratory for Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084People’s Republic of China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510000People’s Republic of China

Solid-state lithium metal batteries(SSLMBs)show great promise in terms of high-energy-density and high-safety ***,there is an urgent need to address the compatibility of electrolytes with high-voltage cathodes/Li anodes,and to minimize the electrolyte thickness to achieve highenergy-density of ***,we develop an ultrathin(12.6μm)asymmetric composite solid-state electrolyte with ultralight areal density(1.69 mg cm^(−2))for *** electrolyte combining a garnet(LLZO)layer and a metal organic framework(MOF)layer,which are fabricated on both sides of the polyethylene(PE)separator separately by tape *** PE separator endows the electrolyte with flexibility and excellent mechanical *** LLZO layer on the cathode side ensures high chemical stability at high *** MOF layer on the anode side achieves a stable electric field and uniform Li flux,thus promoting uniform Li^(+)*** to the well-designed structure,the Li symmetric battery exhibits an ultralong cycle life(5000 h),and high-voltage SSLMBs achieve stable cycle *** assembled pouch cells provided a gravimetric/volume energy density of 344.0 Wh kg^(−1)/773.1 Wh L^(−1).This simple operation allows for large-scale preparation,and the design concept of ultrathin asymmetric structure also reveals the future development direction of SSLMBs.

关键词： Solid-state lithium metal batteries Composite solid-state electrolyte Ultrathin asymmetric structure Pouch cells

Nano-alumina@cellulose-coated separators with the reinforcedconcrete-like structure for high-safety lithium-ion batteries

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Chinese Journal of Chemical Engineering 2024年第4期68卷 83-93页

作者： Zhihao Yang Li Chen Jian Xue Miaomiao Su Fangdan Zhang Liangxin Ding suqing wang Haihui wang Guangdong Provincial Key Lab of Green Chemical Product Technology School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China Beijing Key Laboratory of Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Separators play a critical role in the safety and performance of lithium-ion ***,commercial polyolefin separators are limited by their poor affinity with electrolytes and low melting *** this work,we constructed a reinforced-concrete-like structure by homogeneously dispersing nano-Al_(2)O_(3) and cellulose on the separators to improve their stability and *** this reinforcedconcrete-like structure,the cellulose is a reinforcing mesh,and the nano-Al_(2)O_(3) acts as concrete to support the *** constructing the reinforced-concrete-like structure,the separators exhibit good stability even at 200℃(thermal shrinkage of 0.3%),enhanced tensile strain(tensile stress of 133.4 MPa and tensile strains of 62%),and better electrolyte wettability(a contact angle of 6.5°).Combining these advantages,the cells with nano-Al_(2)O_(3)@cellulose-coated separators exhibit stable cycling performance and good rate ***,the construction of the reinforced-concretelike structure is a promising technology to promote the application of lithium-ion batteries in extreme environments.

关键词： Alumina Nanomaterials Lithium-ion batteries Membranes Cellulose Reinforced-concrete-like structure

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三维点云数据的精确快速面图元检测方法

激光与光电子学进展 2024年第4期61卷 304-316页

作者：石敏周绍卿王素琴朱登明华北电力大学控制与计算机工程学院北京102206 太仓中科信息技术研究院江苏太仓215400 中国科学院计算技术研究所北京100190

目前在零件模型上容易将低曲率圆柱面的局部区域识别为平面,并且只能做到一种图元的快速准确检测。基于此,提出一种能够同时对平面和圆柱面进行精确快速检测的面向点云数据的面图元快速检测方法。该方法分为粗识别和精化两阶段:首先,将... 详细信息

目前在零件模型上容易将低曲率圆柱面的局部区域识别为平面,并且只能做到一种图元的快速准确检测。基于此,提出一种能够同时对平面和圆柱面进行精确快速检测的面向点云数据的面图元快速检测方法。该方法分为粗识别和精化两阶段:首先,将点云划分为小粒度基片,计算基片特征,粗识别出平面基片或圆柱面基片;之后,根据过滤条件将圆柱面基片邻近的平面基片过滤,合并具有相同特征的基片得到完整平面和圆柱面。使用5个机械零件数据进行实验验证,并将其与目前流行的两种识别方法进行比较。结果表明,该方法不会出现其他两种方法存在的遗漏和错误识别现象,同时在多圆柱面相连时的准确分割以及曲面参数精度上,优于其他两种方法。

关键词：三维点云图元检测区域增长机械零件基片特征

High safety separators for rechargeable lithium batteries

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Science China Chemistry 2021年第7期64卷 1131-1156页

作者： Miaomiao Su Guang Huang suqing wang Yanjie wang Haihui wang School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510640China Beijing Key Laboratory of Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Shenzhen Senior Technology Material Co. Ltd.Shenzhen 518106China

Lithium-ion batteries(LIBs)are presently dominant mobile power sources due to their high energy density,long lifespan,and low self-discharging *** safety of LIBs has been concerned all the time and become the main problem restricting the development of high energy density *** a significant part of LIBs,the properties of separators have a significant effect on the capacity and performances of batteries and play an important role in the safety of *** recent years,researchers devoted themselves to the development of various multi-functional safe separators from different views of methods,materials,and practical *** this review,we mainly focus on the recent progress in the development of high-safety separators with high thermal stability,good lithium dendritic resistance,high mechanical strength and novel multifunction for high-safety LIBs and have in-depth discussions regarding the separator's significant contribution to enhance the safety and performances of the ***,the future directions and challenges of separators for the next-generation high-safety and high energy density rechargeable lithium batteries are also provided.

关键词： separator high safety lithium-ion batteries

上海地区新优葡萄品种关键技术集成及结构优化建议

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中外葡萄与葡萄酒 2024年第3期 83-87页

作者：王素青单涛单文峰单文龙上海马陆葡萄研究所上海201818

上海地区葡萄成熟期集中在7月中旬至9月上旬。近年来,随着上海内外市场的不断变化,葡萄的销售压力逐年增加,引进新优品种、调整品种结构、拉长供应期是缓解销售压力、增加效益的迫切需求。本文对引进的4个优质早熟品种和1个中晚熟品种,... 详细信息

上海地区葡萄成熟期集中在7月中旬至9月上旬。近年来,随着上海内外市场的不断变化,葡萄的销售压力逐年增加,引进新优品种、调整品种结构、拉长供应期是缓解销售压力、增加效益的迫切需求。本文对引进的4个优质早熟品种和1个中晚熟品种,通过促早栽培将上市期从7月中旬提早至5月下旬,对丰富果品种类、满足市场需求、提高种植效益起到一定的作用。

关键词：引进新优品种拉长市场供应品种结构调整

维普期刊数据库博看期刊

Composite polymer electrolyte reinforced by graphitic carbon nitride nanosheets for room-temperature all-solid-state lithium batteries

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Chinese Journal of Chemical Engineering 2023年第2期54卷 257-263页

作者： Qingyue Han suqing wang Wenhan Kong Bing Ji Haihui wang School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510640China Beijing Key Laboratory for Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

By virtue of the flexibility and safety, polyethylene oxide(PEO) based electrolytes are regarded as an appealing candidate for all-solid-state lithium batteries. However, their application is limited by the poor ionic conductivity at room temperature, narrow electrochemical stability window and uncontrolled growth of lithium dendrite. To alleviate these problems, we introduce the ultrathin graphitic carbon nitride nanosheets(GCN) as advanced nanofillers into PEO based electrolytes(GCN-CPE). Benefiting from the high surface area and abundant surface N-active sites of GCN, the GCN-CPE displays decreased crystallinity and enhanced ionic conductivity. Meanwhile, Fourier transform infrared and chronoamperometry studies indicate that GCN can facilitate Li+migration in the composite electrolyte. Additionally, the GCN-CPE displays an extended electrochemical window compared with PEO based electrolytes. As a result, Li symmetric battery assembled with GCN-CPE shows a stable Li plating/stripping cycling performance, and the all-solid-state Li/LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NCM622) batteries using GCN-CPE exhibit satisfactory cyclability and rate capability in a voltage range of 3-4.2 V at 30 ℃.

关键词： Electrolytes Polymers Graphitic carbon nitride nanosheets Composites Room temperature All-solid-state battery

Bifunctional separator with high thermal stability and lithium dendrite inhibition toward high safety lithium-ion batteries

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Chinese Chemical Letters 2023年第5期34卷 553-556页

作者： Miaomiao Su Yifu Chen suqing wang Haihui wang School of Chemistry&Chemical Engineering South China University of TechnologyGuangzhou 510640China School of Chemical Engineering Tsinghua UniversityBeijing 100084China

Coating inorganic ceramic particles on commercial polyolefin separators has been considered as an effective strategy to improve thermostability of ***,the introduction of the coating layer could induce pore blockage on the surface of the polyolefin ***,a ceramic composite layer that consists of alumina nanoparticles(n-Al_(2)O_(3))and halloysite nanotubes(HNTs)is designed to modify the polyethylene(PE)separator(the modified separator is denoted as AH-PE).The HNTs with hollow nanotubular structure construct a light skeleton and provide fast ion transport channels while Al_(2)O_(3)particles function as heat-resistant fillers to inhibit the shrinkage of the separator at elevated *** total thickness of AH-PE separator is only 14μ***,the mass increment of AH-PE separator decreases from 5 g/m^(2)to 3.5 g/m^(2),and the Gurley value reduces by 23%,compared with Al_(2)O_(3)coated PE separator(A-PE).Due to the synergistic effects of Al_(2)O_(3)and HNTs,AH-PE separator exhibits highly improved thermal stability(almost no shrinkage at 170℃for 30 min),high Li^(+)transference number(up to 0.47),and long cycle life of 450 h for Li|Li ***,the Li Fe PO_(4)/Li cells assembled with AH-PE separators demonstrate improved rate capability and safety performance.

关键词： Separator Lithium dendrite Thermal stability Halloysite nanotubes Lithium-ion batteries

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大学生健康教育知行转化影响因素分析

中国冶金教育 2024年第4期 66-69页

作者：李婉婷王素青武汉大学公共卫生学院湖北武汉430071 武汉大学护理学院湖北武汉430071

选取武汉大学通识课行为健康和营养学本科生,根据行为改变意愿在开课之初签订“行为契约”,课程结束时对学生行为改变进行评估并分析其影响因素。签订“行为契约”的本科生行为改变目标完成率62.778%。学生的性别、年级和专业对行为改... 详细信息

选取武汉大学通识课行为健康和营养学本科生,根据行为改变意愿在开课之初签订“行为契约”,课程结束时对学生行为改变进行评估并分析其影响因素。签订“行为契约”的本科生行为改变目标完成率62.778%。学生的性别、年级和专业对行为改变的影响不具有统计学上的显著性。在课程进行过程中,坚持在“行为健康”公众号打卡的学生较不使用打卡工具的学生有更高的完成率(84.956%vs 25.373%,P<0.05)。“行为契约”类型也显著影响其行为转化,对将运动作为行为改变目标的学生影响最大。在健康通识教育课程中采用“行为契约”并辅以打卡工具有利于缩短学生的“知-行”差距,促进健康行为转化。

关键词：行为契约行为健康大学生健康教育

A Novel Aminoalkylsilane Compound with Oligo(ethylene oxide) Units as Effective Additive for Improving Cyclability of Lithium-ion Batteries

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Journal of Materials Science & Technology 2013年第10期29卷 943-947页

作者： suqing wang Jinglun wang Hao Luo Xinyue Zhao Lingzhi Zhang Guangzhou Institute of Energy Conversion Chinese Academy of Sciences

A new aminoalkylsilane compound, （（2-（2-（N,N-dimethylamino）ethoxy）ethoxy） methyl）trimethylsilane （TMSC1N2） based on the oligo（ethylene oxide） chain end-capped with organosilicon functional group and alkylamine group on each end, was introduced as an electrolyte additive for lithium-ion batteries. Electrochemical performances of different volume ratios of TMSC1N2 in the baseline electrolyte were conducted through cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge/ discharge tests of lithium-ion batteries. With adding 5 vol.% TMSC1N2 to the baseline electrolyte （1 mol/L LiPF6 in ethylene carbonate and diethyl carbonate （EC：DEC = 1：1, in volume））, the capacity retention of LiFePO4/Li cells could be significantly improved from 74.7% to 90.8% after 130 cycles. Furthermore, TMSC1N2 showed good compatibility with graphite electrode and would not deteriorate the electrochemical performance of graphite/Li anode cells. These data suggested that TMSC1N2 could be utilized as an effective additive for lithium-ion batteries.

关键词： Aminoalkylsilane Electrolyte additive Lithium-ion batteries

基于大数据分析技术探究互联网时代下打造老年网络社交创作平台的可行性及意义

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计算机应用文摘 2024年第6期40卷 105-110页

作者：崔娅琦张猛王佳越王苏卿王本香华中师范大学武汉430000

在信息化、数字化与老龄化重叠交汇的时代,老年人成为深受互联网影响的人群之一。互联网时代不仅促进了老年人新型社会交往关系的链接,也为老年人展示自我、结交新朋友创造了条件和机会。从老年人个体来看,在原有家庭、朋友网络之外建... 详细信息

在信息化、数字化与老龄化重叠交汇的时代,老年人成为深受互联网影响的人群之一。互联网时代不仅促进了老年人新型社会交往关系的链接,也为老年人展示自我、结交新朋友创造了条件和机会。从老年人个体来看,在原有家庭、朋友网络之外建立起的第四社交圈对于缓解老年人的孤独、防止老年人的社会隔离和边缘化具有重要作用。文章利用大数据分析技术,旨在从海量数据中挖掘出有价值的信息,并为老年网络社交创作平台的建设提供有力的支持。

关键词：大数据分析技术老年群体网络社交创作平台