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Copper-coated Porous Polyimide as Ultralight and Safe Current Collectors for Advanced LIBs

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Chinese Journal of Polymer Science 2024年第4期42卷 521-531页

作者： Cun-Sheng Liu Jun-Qi Hu Ting-Ting Mao Song-yi liao Ru-Ming Feng yi-Dong Liu Yong-Gang Min School of Materials and Energy Guangdong University of TechnologyGuangzhou510006China College of Chemistry and Chemical Engineering Zhongkai University of Agriculture and EngineeringGuangzhou510225China Shanwei Branch of Advanced Energy Science and Technology Guangdong Laboratory Shanwei516600China

Metallic copper is widely used as current collector(CC) for graphite anode of lithium-ion batteries(LIBs) due to its high electrical conductivity and electrochemical stability. However, the large volume density of commercial copper foil(~8.9 g·cm^(-3)) limits the increase of energy density of battery. Here, copper-coated porous polyimide(Cu@PPI) was prepared by vacuum evaporation as collector for the graphite anode. The sandwich structure connects the copper metal on both sides of the collector with excellent electrical conductivity. Compared to commercial Cu foil, Cu@PPI has lighter mass(≤3.9 mg for disc of 12 mm diameter versus 9.9 mg of ~10 μm Cu foil) and lower volume density(≤3.3 g·cm^(-3)). In addition, the porous structure allows of better adhesion of reactive substances and electrochemical properties than pure Cu foils. It is estimated that the energy density of Cu@PPI should be much higher than that of Cu foil. This strategy should be applicable for other current collectors.

关键词： Copper-coated Vacuum evaporation Porous polyimide(PPI) Current collector(CC) LIBs

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Intermittent Theta Burst Stimulation Attenuates Cognitive Deficits and Alzheimer’s Disease-Type Pathologies via ISCA1-Mediated Mitochondrial Modulation in APP/PS1 Mice

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Neuroscience Bulletin 2024年第2期40卷 182-200页

作者： Yang Zhu Hao Huang Zhi Chen Yong Tao Ling-yi liao Shi-Hao Gao Yan-Jiang Wang Chang-Yue Gao Department of Rehabilitation Medicine Daping HospitalArmy Medical UniversityChongqing 400042China Department of Neurology and Center for Clinical Neuroscience Daping HospitalArmy Medical UniversityChongqing 400042China Department of Special Medicine Daping HospitalArmy Medical UniversityChongqing 400042China

Intermittent theta burst stimulation(iTBS),a time-saving and cost-effective repetitive transcranial magnetic stimulation regime,has been shown to improve cognition in patients with Alzheimer’s disease(AD).However,the specific mechanism underlying iTBS-induced cognitive enhancement remains unknown.Previous studies suggested that mitochondrial functions are modulated by magnetic stimulation.Here,we showed that iTBS upregulates the expression of iron-sulfur cluster assembly 1(ISCA1,an essential regulatory factor for mitochondrial respiration)in the brain of APP/PS1 mice.In vivo and in vitro studies revealed that iTBS modulates mitochondrial iron-sulfur cluster assembly to facilitate mitochondrial respiration and function,which is required for ISCA1.Moreover,iTBS rescues cognitive decline and attenuates AD-type pathologies in APP/PS1 mice.The present study uncovers a novel mechanism by which iTBS modulates mitochondrial respiration and function via ISCA1-mediated iron-sulfur cluster assembly to alleviate cognitive impairments and pathologies in AD.We provide the mechanistic target of iTBS that warrants its therapeutic potential for AD patients.

关键词： Intermittent theta burst stimulation Alzheimer’s disease Iron-sulfur cluster assembly 1 Mitochondrial dysfunction Neurodegeneration

Toward High Performance Ambipolar Transport from Super-exchange Perspective:Theoretical Insights for IID-based Copolymers

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Chinese Journal of Polymer Science 2022年第4期40卷 355-364页

作者： Wei-Na Zhang Xiao-Qian Wu Guo Wang Yu-Ai Duan Hua Geng yi liao Department of Chemistry Beijing Advanced Innovation Center for Imaging Theory and TechnologyCapital Normal UniversityBeijing 100048China

High-performance ambipolar charge transport materials can reduce the manufacturing cost of OFET and OPV devices,and simplify circuit design and device structure.In order to obtain ambipolar donor-acceptor(D-A)polymer,many efforts have been made through different donor and acceptor combination,halogenation or heteroatom substitution.However,the influencing factor for charge transport polarity is still much complicated.Based on intra-chain super-exchange mechanism for D-A polymer,we found that the energy alignment of donor and acceptor moiety has large impact on charge transport polarity.When the HOMO-LUMO(H-L)gap of the acceptor moiety is narrow,its HOMO/LUMO energy level both lie between the HOMO and LUMO of the donor moiety(sandwich-type energy alignment),and the corresponding D-A copolymers will be more likely ambipolar transport.And thus,take a narrow H-L gap thiazoleisoindigo(TzIID)acceptor as an example,we demonstrated that a series of TzIID based copolymers combined with wide H-L gap donor moieties can reveal ambipolar transport.We further predict several high performance ambipolar D-A copolymers(TzIID-TT etc.)with balanced electron and hole transport,whose effective mass(m_(e)^(*)=0.146 and m_(h)^(*)=0.128)is one of the smallest effective masses among ambipolar materials.

关键词： D-A copolymer Ambipolar Super-exchange mechanism Charge transport

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High‐altitude tunnel‐catenary gap impulse discharge characteristics and breakdown voltage correction

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High Voltage 2023年第6期8卷 1285-1295页

作者： yi liao Xingliang Jiang Guolin Yang Jianlin Hu Zhijin Zhang Qin Hu Chen Tan Haitao Wu Xuefeng Mountain Energy Equipment Safety National Observation and Research Station of Chongqing University ChongqingChina State Grid Chengdu Power Supply Company ChengduChina State Grid Chongqing Electric Power Research Institute ChongqingChina

Air gap impulse discharge characteristics of railway tunnel‐catenary at high‐altitude are of great significance to the electrical insulation design.The existing altitude correction methods for non‐uniform air gaps are not applicable to tunnel‐catenary.To investigate the impulse discharge characteristics of the tunnel‐catenary,a typical structural model was built in an artificial climate chamber.Different altitudes were simulated by adjusting the atmospheric pressure.The 50%breakdown voltages of the 300–700 mm tunnel‐catenary gap were tested at 243–4000 m.The test found that the altitude/atmospheric pressure and gap length have an evident effect on the 50%impulse breakdown voltage,and the influence of humidity is relatively small.The polarity effect was analysed by streamer theory.The{d,P,h}parameter method was employed to obtain the fitting formulas for the impulse breakdown voltage.A high‐altitude correction method for the tunnel‐catenary breakdown voltage based on 1 km altitude was proposed.Field natural tests were conducted to verify the accuracy of the proposed method.The results show that the breakdown voltage obtained by the correction method has an average error of 3.66%in the results of the field tests,indicating that the method has engineering application prospects.

关键词： breakdown altitude correction

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法律如何塑造“老年”

中国社会科学评价 2024年第1期 114-123,160页

作者：廖奕武汉大学法学院武汉430072

讨论法律如何塑造“老年”,应将演进和建构维度结合,凸显特定的社会文化意义。西方古典时代的“美德老年”反映出“理性”的最高标准,中世纪的基督教信仰使其归于“天国”,生发出尘世的“衰朽老年”形象。进入近现代后,西方法制最终形... 详细信息

讨论法律如何塑造“老年”,应将演进和建构维度结合,凸显特定的社会文化意义。西方古典时代的“美德老年”反映出“理性”的最高标准,中世纪的基督教信仰使其归于“天国”,生发出尘世的“衰朽老年”形象。进入近现代后,西方法制最终形成“弱者老年”预设。相比而言,中国法制的“伦理老年”形象更为积极和稳定。近代以降,“革命老年”“劳动者老年”和“美满老年”的制度变迁,反映出总体的积极意象和贯通结构,具有复合均衡的发展趋向。深切把握老年的法律塑造机理,有助于充分达成学理阐释和实践战略的双向优化。

关键词：老龄化老年法老年权利法律塑造

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数智传播背景下高职院校思政教育策略探赜

中国职业技术教育 2024年第7期 89-95页

作者：廖佚湖南商务职业技术学院

推动思政教育转型是新时代落实立德树人根本任务、助力高职高质量发展的重要改革行动。数智传播与高职思政结合是高职思政教育现代化的必然要求,是职业道德精神培育的现实需要和数智传播健康发展的内在需求。针对数智传播背景下高职思... 详细信息

推动思政教育转型是新时代落实立德树人根本任务、助力高职高质量发展的重要改革行动。数智传播与高职思政结合是高职思政教育现代化的必然要求,是职业道德精神培育的现实需要和数智传播健康发展的内在需求。针对数智传播背景下高职思政教育出现“师”导转向“机”导、“育人”转向“育技”、“有情”转向“无情”、“真学”转向“难辨”的倾向,建议构建“理念上守正创新、技术上协同创新、行动上价值引领、培养上师生一体”四位一体的策略体系,以探索数智传播背景下高职院校思政教育的优化路向。

关键词：数智传播高职院校思政教育策略

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Postpartum depression and major depressive disorder:the same or not?Evidence from resting-state functional MRI

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Psychoradiology 2022年第3期2卷 121-128页

作者： Bochao Cheng yi Guo Xijian Chen Bin Lv yi liao Haibo Qu Xiao Hu Haoxiang Yang Yajing Meng Wei Deng Jiaojian Wang Department of Radiology West China Second University Hospital of Sichuan UniversityChengdu 610041China Key Laboratory of Birth Defects and Related Diseases of Women and Children(Sichuan University) Ministry of EducationChengdu 610041China Department of Gynecology and Obstetrics West China Second University HospitalSichuan UniversityChengdu 610041China Department of Rehabilitation Medicine West China Second University HospitalSichuan UniversityChengdu 610041China Department of Psychiatry West China Hospital of Sichuan UniversityChengdu 610041China Affiliated Mental Health Center&Hangzhou Seventh People’s Hospital Zhejiang University School of MedicineHangzhouZhejiang 310063China State Key Laboratory of Primate Biomedical Research Institute of Primate Translational MedicineKunming University of Science and TechnologyKunming 650500China Yunnan Key Laboratory of Primate Biomedical Research KunmingYunnan 650500China

Background Although postpartum depression(PPD)and non-peripartum major depressive disorder(MDD)occurring within and outside the postpartum period share many clinical characteristics,whether PPD and MDD are the same or not remains controversial.Methods The current study was devoted to identify the shared and different neural circuits between PPD and MDD by resting-state functionalmagnetic resonance imaging data from 77 participants(22 first-episodic drug-naleMDD,26 drug-nale PPD,and 29 healthy controls(HC)).Results Both the PPD andMDD groups exhibited higher fractional amplitude of low-frequency fluctuation(fALFF)in left temporal pole relative to the HC group;the MDD group showed specifically increased degree centrality in the right cerebellum while PPD showed specifically decreased fALFF in the left supplementary motor area and posterior middle temporal gyrus(pMTG_L),and specifically decreased functional connectivities between pMTG and precuneus and between left subgeneual anterior cingulate cortex(sgACC_L)and right sgACC.Moreover,sgACC and left thalamus showed abnormal regional homogeneity of functional activities between any pair of HC,MDD,and PPD.Conclusions These results provide initial evidence that PPD and MDD have common and distinct neural circuits,which may facilitate understanding the neurophysiological basis and precision treatment for PPD.

关键词： postpartum depression major depressive disorder resting-state fMRI functional activity functional connectivity

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基于双特征的短波红外星图识别算法

电光与控制 2024年第6期31卷 56-61页

作者：廖屹张磊中国科学院长春光学精密机械与物理研究所长春130000 中国科学院大学北京100000

在短波红外波段进行昼夜测星有望实现近地空间全天时自动导航,其中,星图识别算法是实现全天时导航的关键技术之一。传统的三角形算法在导航星数增多的情况下,由于其匹配特征维度低,在识别时容易出现冗余匹配、误匹配的情况。针对这一问... 详细信息

在短波红外波段进行昼夜测星有望实现近地空间全天时自动导航,其中,星图识别算法是实现全天时导航的关键技术之一。传统的三角形算法在导航星数增多的情况下,由于其匹配特征维度低,在识别时容易出现冗余匹配、误匹配的情况。针对这一问题,提出了一种基于双特征的短波红外星图识别算法,该算法选取三角形的面积与外切圆半径双高维特征作为匹配特征,通过构建面积特征的K矢量索引,应用K矢量查找法降低匹配识别的计算复杂度。此外,还提出一种优化的观测三角形的选择策略,减少了匹配过程中的计算量,提高算法的识别速度。实验表明,星点位置噪声低于2像素时,算法的平均识别率优于95%;伪星数未超过50%时,平均识别率可达87.6%;并通过实际观星试验验证了所提算法的可行性,与改进的三角形算法相比,该算法在识别速度、识别率以及抗噪声能力等方面都有明显优势。

关键词：短波红外星敏感器星图识别三角形算法 K矢量查找

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Performance of rolling piston type rotary compressor using fullerenes(C70)and NiFe204 nanocomposites as lubricants additives

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Frontiers in Energy 2020年第3期14卷 644-648页

作者： Ruixiang WANG yihao ZHANG yi liao Beijing Engineering Research Centre of Sustainable Energy and Buildings Beijing University of Civil Engineering and ArchitectureBeijing 100044China Beijing Institute of Architectural Design Beijing 100045China Zhuhai Lingda Compressor Co. Ltd.Zhuhai 519100China

A novel way for a compressor to improve its coefficient of performance was proposed in this paper.Fullerenes(C70)and NiFe2O4 nanocomposites were modified by span 80 and dispersed in refrigeration oil by solid grinding(SG).Besides,the tribological properties of the nanocomposites were investigated using a four ball friction tester.The results show that when the mass concentration of fullerenes nanocomposite is higher than 60 ppm and the concentration of nano-oil is 2 g/L,the friction coefficient decreases from 0.13 to 0.06 which means the wear is reduced.The coefficient of performance of the compressor under the air conditioning test condition can be raised by 1.23%.

关键词： rotary compressor friction coefficient nanocomposite materials coefficient of performance fullerenes(C70)