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Establishing a new testing protocol of the electrochemical stability window for electric double-layer capacitors

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Science China Chemistry 2025年第01期 217-225页

作者： Ruilin hou Xiaoxi Zhao Tingting Liang Qingyun Dou Shan Xu Xingbin yan School of Materials Science and Engineering Sun Yat-sen University Laboratory of Clean Energy Chemistry and Materials Lanzhou Institute of Chemical Physics Chinese Academy of Sciences College of Engineering and Applied Sciences Nanjing University Center of Industrial Analysis and Testing Guangdong Academy of Science

The electrochemical stability window(ESW) is crucial for determining the energy density of electric double-layer capacitors(EDLCs). However, current ESW testing protocols of EDLCs are strongly affected by artificial factors, thereby leading to unreliable result. To solve this problem, we first identify the key shortcomings of the traditional protocols by analyzing their test principles. Subsequently, taking an aqueous carbon-based EDLC as an example, we design a side reaction descriptor to represent the response difference in the charging capacitance to side reactions between the cyclic voltammetry and galvanostatic chargedischarge methods. With the aid of this descriptor, we propose a new ESW testing protocol, which is not only able to completely avoid the adverse influence of subjective factors but also fully consider the operating condition limitations. The protocol can be extended from the single electrode to the full device. This work proposes a more rigorous definition of ESW and provides a reliable protocol for evaluating the ESW of EDLCs.

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双核三联吡啶钌(Ⅱ)配合物的合成及其光谱和电化学性质

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应用化学 2006年第5期23卷 465-470页

作者：陈学刚程延祥耿延侯王利祥中国科学院长春应用化学研究所高分子物理与化学国家重点实验室

设计合成了以对乙烯基苯撑齐聚体为桥的双2,2′：6′,2″-三联吡啶配体,经过分步配位,得到双核三联吡啶钌（Ⅱ）配合物. 光谱研究表明,这类配合物在室温下存在强的金属到配体的电荷转移（MLCT）吸收峰. 常温下由于其激发态寿命太短而无... 详细信息

设计合成了以对乙烯基苯撑齐聚体为桥的双2,2′：6′,2″-三联吡啶配体,经过分步配位,得到双核三联吡啶钌（Ⅱ）配合物. 光谱研究表明,这类配合物在室温下存在强的金属到配体的电荷转移（MLCT）吸收峰. 常温下由于其激发态寿命太短而无荧光发射,而在低温（77 K）下,则表现出红光发射（639～641 nm）. 双核配合物中基于中心离子钌的可逆的氧化电位在＋1.25 eV左右,基于三联吡啶单元的第一还原电位位于-1.15 eV左右,第二还原电位则位于-1.38 eV左右.

关键词：三联吡啶双核钌(Ⅱ)配合物光谱法电化学性质

基于含硫芳杂稠环化合物的可溶性共轭齐聚物的合成、表征及其在有机薄膜晶体管中的应用

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分子科学学报 2012年第2期28卷 101-108页

作者：韩洋田洪坤鲍程闫东航耿延候王佛松中国科学院长春应用化学研究所高分子物理与化学国家重点实验室吉林长春130022 中国科学院研究生院北京100039

设计并合成了4个基于含硫芳杂稠环化合物的可溶性共轭齐聚物,即以3-十一烷基苯并[d,d′]噻吩并[3,2-b;4,5-b′]并二噻吩(BTTT)为末端芳香单元,噻吩(T)、二噻吩(bT)、N-十二烷基-二噻吩并[3,2-b]吡咯(TP)或2,5-双(3-十二烷基噻吩)[3,2-b... 详细信息

设计并合成了4个基于含硫芳杂稠环化合物的可溶性共轭齐聚物,即以3-十一烷基苯并[d,d′]噻吩并[3,2-b;4,5-b′]并二噻吩(BTTT)为末端芳香单元,噻吩(T)、二噻吩(bT)、N-十二烷基-二噻吩并[3,2-b]吡咯(TP)或2,5-双(3-十二烷基噻吩)[3,2-b]并二噻吩(qT)为中间芳香单元的共轭齐聚物.它们的HOMO能级和能隙分别处于-5.35～-4.95eV和2.62～2.44eV.通过溶液旋涂的方法制备了有序的薄膜,除T-BTTT外,其他3个化合物在薄膜中均表现出edge-on型的层状排列结构.制备了底栅-顶接触型的有机薄膜晶体管器件,qT-BTTT具有最高的场效应迁移率,达到0.012cm2/V.s.

关键词：有机薄膜晶体管芳杂稠环化合物共轭齐聚物溶液加工

Repetitive transcranial magnetic stimulation in Alzheimer’s disease:effects on neural and synaptic rehabilitation

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Neural Regeneration Research 2025年第2期20卷 326-342页

作者： Yi Ji Chaoyi yang Xuerui Pang Yibing yan Yue Wu Zhi geng Wenjie Hu Panpan Hu Xingqi Wu Kai Wang Department of Neurology The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina Anhui Province Key Laboratory of Cognition and Neuropsychiatric Disorders HefeiAnhui ProvinceChina Collaborative Innovation Center of Neuropsychiatric Disorders and Mental Health HefeiAnhui ProvinceChina Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefeiAnhui ProvinceChina Department of Psychology and Sleep Medicine The Second Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina

Alzheimer’s disease is a neurodegenerative disease resulting from deficits in synaptic transmission and *** Alzheimer’s disease brain tends to be hyperexcitable and hypersynchronized,thereby causing neurodegeneration and ultimately disrupting the operational abilities in daily life,leaving patients *** transcranial magnetic stimulation is a cost-effective,neuro-modulatory technique used for multiple neurological *** the past two decades,it has been widely used to predict cognitive decline;identify pathophysiological markers;promote neuroplasticity;and assess brain excitability,plasticity,and *** has also been applied to patients with dementia,because it can yield facilitatory effects on cognition and promote brain recovery after a neurological ***,its therapeutic effectiveness at the molecular and synaptic levels has not been elucidated because of a limited number of *** study aimed to characterize the neurobiological changes following repetitive transcranial magnetic stimulation treatment,evaluate its effects on synaptic plasticity,and identify the associated *** review essentially focuses on changes in the pathology,amyloidogenesis,and clearance pathways,given that amyloid deposition is a major hypothesis in the pathogenesis of Alzheimer’s *** mechanisms associated with repetitive transcranial magnetic stimulation procedures and different pathways mediating gene transcription,which are closely related to the neural regeneration process,are also ***,we discuss the outcomes of animal studies in which neuroplasticity is modulated and assessed at the structural and functional levels by using repetitive transcranial magnetic stimulation,with the aim to highlight future directions for better clinical translations.

关键词： Alzheimer’s disease amyloid deposition apoptotic mechanisms biomarker neural regeneration neurodegeneration repetitive transcranial magnetic stimulation synaptic plasticity

齐聚[3，2-b]并二噻吩的合成、表征及其在有机薄膜晶体管中的应用

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分子科学学报 2009年第3期25卷 153-157页

作者：杨宝麟田洪坤宋德闫东航耿延候王佛松中国科学院长春应用化学研究所高分子物理与化学国家重点实验室吉林长春130022 中国科学院研究生院北京100039

通过Stille偶联反应合成了5,5″-二辛基-2,2′∶5′2″-三联[3,2-b]并二噻吩,并对该化合物的物理化学性质以及真空蒸镀薄膜的结构和形貌进行了详细表征.以这一化合物作为半导体层、采用顶电极结构制备了有机薄膜晶体管,并对薄膜生长基... 详细信息

通过Stille偶联反应合成了5,5″-二辛基-2,2′∶5′2″-三联[3,2-b]并二噻吩,并对该化合物的物理化学性质以及真空蒸镀薄膜的结构和形貌进行了详细表征.以这一化合物作为半导体层、采用顶电极结构制备了有机薄膜晶体管,并对薄膜生长基底温度做了优化,发现基底温度为100℃时器件性能最好,迁移率达到0.13 cm2/V.s,开关比为7×103,阈值电压为-19V.

关键词： [3,2-b]并二噻吩有机半导体有机薄膜晶体管

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单分散共轭齐聚物的合成方法

分子科学学报 2008年第2期24卷 87-96页

作者：刘勤张效洁耿延候王佛松中国科学院长春应用化学研究所高分子物理与化学国家重点实验室

简要介绍了线性、星形和环状单分散共轭齐聚物的主要合成方法,并对不同方法的优缺点做了简要评述.其中,线性单分散共轭齐聚物的合成方法主要有4种,即控制聚合方法,发散合成方法,发散/收敛合成方法和指数增长合成方法.在星状单分散共轭... 详细信息

简要介绍了线性、星形和环状单分散共轭齐聚物的主要合成方法,并对不同方法的优缺点做了简要评述.其中,线性单分散共轭齐聚物的合成方法主要有4种,即控制聚合方法,发散合成方法,发散/收敛合成方法和指数增长合成方法.在星状单分散共轭齐聚物方面,主要介绍了两种苯环成环反应的应用.环状共轭齐聚物的合成主要介绍了聚合过程中的成环反应、线性共轭齐聚物的分子内环化反应和模板导向环化反应.

关键词：单分散共轭齐聚物合成方法交叉偶联反应模板导向环化反应

二噻吩并吡咯-苯并噻二唑D-A型共轭齐聚物的合成、表征及其在体相异质结太阳能电池中的应用

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分子科学学报 2011年第1期27卷 1-6页

作者：赵慧宇李长胤田洪坤谢志元耿延候王佛松中国科学院长春应用化学研究所高分子物理与化学国家重点实验室吉林长春130022 中国科学院研究生院北京100039

以二噻吩[3,2-b:2′,3′-d]并吡咯为电子给体单元、2,1,3-苯并噻二唑为电子受体单元,通过Stille偶联反应合成了4个含不同烷基取代基的给体-受体(D-A)型共轭齐聚物,即O-D3,O-D2P1,O-D1P2和O-P3,它们分别含有3～0个正十二烷基(D=dodecyl)... 详细信息

以二噻吩[3,2-b:2′,3′-d]并吡咯为电子给体单元、2,1,3-苯并噻二唑为电子受体单元,通过Stille偶联反应合成了4个含不同烷基取代基的给体-受体(D-A)型共轭齐聚物,即O-D3,O-D2P1,O-D1P2和O-P3,它们分别含有3～0个正十二烷基(D=dodecyl)和0～3个支化烷基链戊基己基(P=1-pentylhexyl).该系列齐聚物在薄膜状态下的吸收光谱与在溶液状态下的吸收光谱相比发生显著红移,且吸收波长主要位于500～800 nm.以该系列齐聚物为给体材料制备的体相异质结太阳能电池器件的性能与烷基链结构相关,支化烷基链含量越高,器件性能越好.含0～3个戊基己基的齐聚物的器件能量转换效率分别为0.66%,0.74%,0.75%和1.33%.

关键词：二噻吩并吡咯 D-A型共轭齐聚物体相异质结太阳能电池

Dimethylacetamide-promoted Direct Arylation Polycondensation of 6,6’-Dibromo-7,7’-diazaisoindigo and(E)-1,2-bis(3,4-difluorothien-2-yl)ethene toward High Molecular Weight n-Type Conjugated Polymers

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Chinese Journal of Polymer Science 2019年第11期37卷 1099-1104页

作者： Kai Guo Yu Jiang Ying Sui Yun-Feng Deng yan-hou geng School of Materials Science and Engineering Tianjin University Tianjin 300072 China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 China

A highly efficient and eco-friendly protocol for the synthesis of an alternating copolymer poly(7,7'-diazaisoindigo-alt-(E)-1,2- bis(3,4-difluorothien-2-yl)ethene)(PAIID-4FTVT) via direct arylation polycondensation (DArP) is presented. Through detailed study, we found that the inhibitory effect of 7,7'-diazaisoindigo on DArP stemmed from the coordination of N atom with catalyst can be overcome by using dimethylacetamide (DMAc) as the co-solvent. Thus, PAIID-4FTVT with number-average molecular weight (Mn)>100kDa was synthesized via DArP by optimizing the content of DMAc. Matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectroscopy revealed that PAIID-4FTVT was defect-free. Top gate and bottom contact (TG/BC) organic thin-film transistors (OTFTs) were fabricated to characterize the semiconducting properties of the polymers. PAIID-4FTVT displayed unipolar n-type characteristics with the electron mobility (μe) strongly dependent on Mn. The highest μe up to 0.25 cm^2·V^-1 s^-1 was achieved with the high molecular weight sample.

关键词： Direct arylation polycondensation Conjugated polymer 7,7-Diazaisoindigo Organic thin-film transistor Electron mobility

Learning hyperspectral images from RGB images via a coarse-to-fine CNN

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Science China(Information Sciences) 2022年第5期65卷 51-64页

作者： Shaohui MEI Yunhao geng Junhui hou Qian DU School of Electronics and Information Northwestern Polytechnical University Department of Electrical and Computer Engineering Mississippi State University Department of Computer Science City University of Hong Kong

Hyperspectral remote sensing is well-known for its extraordinary spectral distinguishability to discriminate different materials. However, the cost of hyperspectral image(HSI) acquisition is much higher compared to traditional RGB imaging. In addition, spatial and temporal resolutions are sacrificed to obtain very high spectral resolution owing to the limitations of sensor technologies. Therefore, in this paper, HSIs are reconstructed using easily acquired RGB images and a convolutional neural network(CNN). As a result,high spatial and temporal resolution RGB images can be inherited to HSIs. Specifically, a two-stage CNN,referred to as the spectral super-resolution network(SSR-Net), is designed to learn the transformation model between RGB images and HSIs from training data, including a band prediction network(BP-Net) to estimate hyperspectral bands from RGB images and a refinement network(RF-Net) to further reduce spectral distortion in the band prediction step. As a result, the learned joint features in the proposed SSR-Net can directly predict HSIs from their corresponding scenes in RGB images without prior knowledge. Experimental results obtained on several benchmark datasets demonstrate that the proposed SSR-Net outperforms several state-of-the-art methods by ensuring higher quality in HSI reconstruction, and significantly improves the performance of traditional RGB images in classification.

关键词： hyperspectral reconstruction convolutional neural network deep learning