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Wide-temperature range and high safety electrolytes for highvoltage Li-metal batteries

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Nano Research 2023年第6期16卷 8260-8268页

作者： Anran Pan Zhicheng Wang fengrui zhang Lei Wang Jingjing Xu Jieyun Zheng Jianchen Hu Chenglong Zhao Xiaodong Wu i-lab Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou 215123China Nano Science and Technology Institute University of Science and Technology of ChinaHefei 230026China Institute of Physics Chinese Academy of SciencesBeijing 100190China College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123China Phylion battery Co. Ltd.Suzhou 215123China

Along with the keeping growing demand for high-energy-density energy storage system,high-voltage Li-metal batteries(LMBs)have attracted many attentions.In view of many defects of the commercial electrolytes,such as flammability,limited operation temperature range,and severe Li dendrite growth,non-flammable phosphate-based localized highly concentrated electrolytes(LHCE)have been explored as one of the safe electrolytes for LMBs.But until now there is rare report on wide-temperature range LMBs using phosphate-based electrolytes.Here,we prepare a wide-temperature LHCE,which is composed of lithium difluoro(oxalato)borate(LiDFOB),triethyl phosphate(TEP),and 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether(HFE),and explore the applicability in wide-temperature LMBs from−40 to 70℃.In the LHCE,both TEP and HFE are non-flammable,and Li^(+) is highly coordinated with TEP and DFOB^(−),which can effectively inhibit the TEP decomposition on anode,and facilitate the preferential reduction of DFOB^(−),thus obtain a robust solid electrolyte interphase(SEI)to suppress Li dendrite growth and side reactions.Therefore,this LHCE can not only endow Li/Cu and Li/Li cells with high Coulombic efficiency(CE)and long cycling lifespan,but also be applied to LiFePO_(4)(LFP)/Li and LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM523)/Li LMBs.Most importantly,the NCM523/Li LMBs with LHCE can deliver stable cycling performance at 4.5 V high-voltage and high-temperature(70℃),as well as excellent low-temperature capacity retention even though both charging and discharging process were carried out at−40℃.

关键词： safe electrolytes wide-temperature non-flammable high-voltage batteries

Techniques for evaluating digestibility of energy, amino acids,phosphorus,and calcium in feed ingredients for pigs

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Animal Nutrition 2017年第4期3卷 344-352页

作者： fengrui zhang Olayiwola Adeola Department of Animal Sciences Purdue University

Sound feed formulation is dependent upon precise evaluation of energy and nutrients values in feed ingredients. Hence the methodology to determine the digestibility of energy and nutrients in feedstuffs should be chosen carefully before conducting experiments. The direct and difference procedures are widely used to determine the digestibility of energy and nutrients in feedstuffs. The direct procedure is normally considered when the test feedstuff can be formulated as the sole source of the component of interest in the test diet. However, in some cases where test ingredients can only be formulated to replace a portion of the basal diet to provide the component of interest, the difference procedure can be applied to get equally robust values. Based on components of interest, ileal digesta or feces can be collected, and different sample collection processes can be used. For example, for amino acids(AA), to avoid the interference of fermentation in the hind gut, ileal digesta samples are collected to determine the ileal digestibility and simple T-cannula and index method are commonly used techniques for AA digestibility analysis. For energy, phosphorus, and calcium, normally fecal samples will be collected to determine the total tract digestibility, and therefore the total collection method is recommended to obtain more accurate estimates. Concerns with the use of apparent digestibility values include different estimated values from different inclusion level and non-additivity in mixtures of feed ingredients. These concerns can be overcome by using standardized digestibility, or true digestibility, by correcting endogenous losses of components from apparent digestibility values. In this review, methodologies used to determine energy and nutrients digestibility in pigs are discussed. It is suggested that the methodology should be carefully selected based on the component of interest, feed ingredients, and available experimental facilities.

关键词： Digestibility Energy Nutrients Pigs Techniques

High ceramic content composite solid-state electrolyte films prepared via a scalable solvent-free process

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Nano Research 2023年第3期16卷 3847-3854页

作者： Daiqian Chen Chenji Hu Qi Chen Guoyong Xue Lingfei Tang Qingyu Dong Bowen Chen fengrui zhang Mingwen Gao Jingjing Xu Yanbin Shen Liwei Chen School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China i-Lab CAS Center for Excellence in NanoscienceSuzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou 215123China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Moleculesand in situ Center for Physical SciencesShanghai Jiao Tong UniversityShanghai 200240China Baosheng(Suzhou)Energy Technology Co. LtdSuzhou 215123China

The development of high-performance solid-state electrolyte(SSE)films is critical to the practical application of all-solid-state Li metal batteries(ASSLMBs).However,developing high-performance free-standing electrolyte films remains a challenging task.In this work,we demonstrate a novel scalable solvent-free process for fabricating high ceramic content composite solid-state electrolyte(HCCSE)films.Specifically speaking,a mixture of ceramic and polymer is dry mixed,fibered,and calendered into a free-standing porous ceramic film,on which polymer precursor is coated and polymerized to bridge the inorganic ceramic particles,resulting in a flexible HCCSE film with a ceramic content of up to 80 wt.%.High ceramic content not only leads to high ionic conductivity but also brings good mechanical properties;while the organic phase enables electrode|electrolyte interfacial stability.When Li_(10)GeP_(2)S_(12)(LGPS)and polymeric ionic liquid-based solid polymer electrolytes(PIL-SPEs)were used as the inorganic and organic phases,respectively,the room temperature ionic conductivity of the resulted HCCSE reaches 0.91 mS·cm−1.Based on this HCCSE,Li||Li symmetric battery cycled stably for more than 2,400 h with ultra-low overpotential,and ASSLMBs with different cathodes(LiFePO4 and sulfurized polyacrylonitrile(PAN-S))present small polarization and decent cyclability at room temperature.This work provides a novel scalable solvent-free strategy for preparing high-performance freestanding composite solid-state electrolyte(CSE)film for room temperature ASSLMBs.

关键词： free-standing solid-state electrolyte film composite solid-state electrolyte solid-state battery

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新时代中国区域协同治理解析与关键议题探讨

城市规划 2024年第2期48卷 4-11页

作者：张京祥李薇张峰瑞南京大学建筑与城市规划学院中国城市规划学会

面向新时代全球资本的“再地方化”转变,产业链、供应链发生近域重组,区域治理被赋予新的时代价值。基于区域协同治理的“客观响应+主动作为”双向驱动机制,重新解析其在时代大背景中的演变历程,揭示区域协同治理已逐步成为产业链与供... 详细信息

面向新时代全球资本的“再地方化”转变,产业链、供应链发生近域重组,区域治理被赋予新的时代价值。基于区域协同治理的“客观响应+主动作为”双向驱动机制,重新解析其在时代大背景中的演变历程,揭示区域协同治理已逐步成为产业链与供应链安全、可控的重要保障。总结国际成熟经验,立足本土实践反思,提出新时代中国区域协同治理面对“竞争”与“合作”、“上层”与“下层”、“政府”与“市场”的3个关键议题,倡导转向共建共治共享共赢的发展观念,建立打破行政藩篱的双层管理创新体制机制,形成政府与市场双轨驱动的区域协同治理模式。

关键词：新时代全球化区域一体化区域协同治理中国

Quantitative Electrophysiological Evaluation of the Analgesic Efficacy of Two Lappaconitine Derivatives: A Window into Antinociceptive Drug Mechanisms

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Neuroscience Bulletin 2021年第11期37卷 1555-1569页

作者： Guixiang Teng fengrui zhang Zhenjiang Li Chun zhang Libo zhang Lele Chen Tao Zhou Lupeng Yue Ji zhang College of Life Science Northwest Normal UniversityLanzhou730070China The Rural Development Academy Northwest Normal UniversityLanzhou730070China CAS Key Laboratory of Mental Health Institute of PsychologyChinese Academy of SciencesBeijing100101China Department of Psychology University of the Chinese Academy of SciencesBeijing100049China School of Psychology Jiangxi Normal UniversityNanchang330022China School of Chemical and Biological Engineering Lanzhou Jiaotong UniversityLanzhou730070China

Quantitative evaluation of analgesic efficacy improves understanding of the antinociceptive mechanisms of new analgesics and provides important guidance for their development.Lappaconitine(LA),a potent analgesic drug extracted from the root of natural Aconitum species,has been clinically used for years because of its effective analgesic and non-addictive properties.However,being limited to ethological experiments,previous studies have mainly investigated the analgesic effect of LA at the behavioral level,and the associated antinociceptive mechanisms are still unclear.In this study,electrocorticogram(ECoG)technology was used to investigate the analgesic effects of two homologous derivatives of LA,Lappaconitine hydrobromide(LAH)and Lappaconitine trifluoroacetate(LAF),on Sprague-Dawley rats subjected to nociceptive laser stimuli,and to further explore their antinociceptive mechanisms.We found that both LAH and LAF were effective in reducing pain,as manifested in the remarkable reduction of nocifensive behaviors and laser-evoked potentials(LEPs)amplitudes(N2 and P2 waves,and gamma-band oscillations),and significantly prolonged latencies of the LEP-N2/P2.These changes in LEPs reflect the similar antinociceptive mechanism of LAF and LAH,i.e.,inhibition of the fast signaling pathways.In addition,there were no changes in the auditory-evoked potential(AEP-N1 component)before and after LAF or LAH treatment,suggesting that neither drug had a central anesthetic effect.Importantly,compared with LAH,LAF was superior in its effects on the magnitudes of gamma-band oscillations and the resting-state spectra,which may be associated with their differences in the octanol/water partition coefficient,degree of dissociation,toxicity,and glycine receptor regulation.Altogether,jointly applying nociceptive laser stimuli and ECoG recordings in rats,we provide solid neural evidence for the analgesic efficacy and antinociceptive mechanisms of derivatives of LA.

关键词： Electrocorticogram Analgesic effect Lappaconitine derivatives Antinociceptive mechanisms Laser-evoked potentials

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基于乔哈里视窗的智慧图书馆服务模型探析

图书馆建设 2024年第1期 131-139页

作者：杜丰瑞张彤阳徐健中山大学信息管理学院

随着智慧图书馆的发展被纳入国家发展规划,进一步明确智慧图书馆的概念及其服务模式有利于推动全国智慧图书馆体系的建设。从以人为中心的角度出发,结合社会认识论和乔哈里视窗模型可以发现,智慧图书馆用户需求包含“已知—已知”需求... 详细信息

随着智慧图书馆的发展被纳入国家发展规划,进一步明确智慧图书馆的概念及其服务模式有利于推动全国智慧图书馆体系的建设。从以人为中心的角度出发,结合社会认识论和乔哈里视窗模型可以发现,智慧图书馆用户需求包含“已知—已知”需求、“已知—未知”需求、“未知—已知”需求和“未知—未知”需求。以人为中心的智慧图书馆可以提供智慧服务,并促进用户智慧跃升。其实现智慧服务的突破口就在于“未知—已知”和“未知—未知”服务的开发,以及从“未知”到“已知”状态的转化。未来智慧服务应该更专注于解决用户“不知道自己不知道的”和“不知道自己知道的”问题。

关键词：智慧图书馆智慧服务智慧服务模型图书馆用户需求用户智慧需求

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Quasi-solid-state polymer plastic crystal electrolyte for subzero lithium-ion batteries

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能源化学：英文版 2020年第7期29卷 87-93,I0003页

作者： Yumei Zhou fengrui zhang Peixin He Yuhong zhang Yiyang Sun Jingjing Xu Jianchen Hu Haiyang zhang Xiaodong Wu i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou 215123JiangsuChina Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Key Laboratory for the Synthesis and Application of Organic Functional MoleculesMinistry of EducationCollege of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062HubeiChina National Engineering Laboratory for Modern Silk College of Textile and Clothing EngineeringResearch Center of Cooperative Innovation for Functional Organic/Polymer Material Micro/NanofabricationSoochow University199 Ren-Ai RoadSuzhou Industrial ParkSuzhou 215123JiangsuChina

Succinonitrile(SN)-based polymer plastic crystal electrolytes(PPCEs)have attracted considerable attention as solid-state electrolytes owing to their high ionic conductivities similar to those of liquid electrolytes,excellent contacts with the electrodes,and good mechanic properties.As a crucial property of a solid-state electrolyte,the ionic conductivity of the PPCE directly depends on the interactions between the constituent parts including the polymer,lithium salt,and SN.A few studies have focused on the effects of polymer–lithium–salt and polymer–SN interactions on the PPCE ionic conductivity.Nevertheless,the impact of the lithium–salt–SN combination on the PPCE ionic conductivity has not been analyzed.In particular,tuning of the lithium-salt–SN interaction to fabricate a subzero PPCE with a high low-temperature ionic conductivity has not been reported.In this study,we design and fabricate five PPCE membranes with different weight ratios of Li N(SO2 CF3)2(Li TFSI)and SN to investigate the effect of the Li TFSI–SN interaction on the PPCE ionic conductivity.The ionic conductivities of the five PPCEs are investigated in the temperature range of–20 to 60°C by electro-chemical impedance spectroscopy.The interaction is analyzed by Fourier-transform infrared spectroscopy,Raman spectroscopy,and differential scanning calorimetry.The Li TFSI–SN interaction significantly influences the melting point of the PPCE,dissociation of the Li TFSI salt,and thus the PPCE ionic conductivity.By tuning the Li TFSI–SN interaction,a subzero workable PPCE membrane having an excellent low-temperature ionic conductivity(6×10-4 S cm–1 at 0°C)is obtained.The electro-chemical performance of the optimal PPCE is evaluated by using a Li Co O2/PPCE/Li4 Ti5 O12 cell,which confirms the application feasibility of the proposed quasisolid-state electrolyte in subzero workable lithium-ion batteries.

关键词： Succinonitrile Polymer plastic crystal electrolyte Ionic conductivity Lithium-salt–succinonitrile interaction Subzero lithium-ion battery

PAC-P(AM-BA)杂化高分子絮凝剂制备及絮凝效能评价

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高校化学工程学报 2024年第2期38卷 286-293页

作者：崔红梅祝凤蕊尹玲孙林阳李凯欣张颖齐晗兵东北石油大学土木建筑工程学院黑龙江大庆163318 黑龙江省寒区新能源热利用及防灾减灾重点实验室黑龙江大庆163318 辽宁省城乡建设规划设计院有限责任公司辽宁沈阳110006

针对油田化学驱污水难处理问题,采用水溶液自由基胶束聚合法,以聚合氯化铝(PAC)为无机组分,丙烯酰胺(AM)、丙烯酸丁酯(BA)为有机单体,合成一种新型无机-有机杂化高分子絮凝剂(PAC-P(AM-BA))。利用傅里叶变换红外光谱仪(FT-IR)、热重分析... 详细信息

针对油田化学驱污水难处理问题,采用水溶液自由基胶束聚合法,以聚合氯化铝(PAC)为无机组分,丙烯酰胺(AM)、丙烯酸丁酯(BA)为有机单体,合成一种新型无机-有机杂化高分子絮凝剂(PAC-P(AM-BA))。利用傅里叶变换红外光谱仪(FT-IR)、热重分析仪(TGA)、扫描电子显微镜(SEM)和比表面积分析仪(BET)对絮凝剂进行表征。结果表明,BA以化学键连接在聚丙烯酰胺(PAM)长链中,无机组分与有机组分之间以离子键连接。PAC-P(AM-BA)热分解温度为233.93℃,比表面积为30.351m^(2)·g^(-1)。絮凝实验结果表明,PAC-P(AM-BA)最佳投加量为20 mg·L^(-1),沉降时间为10 h,其絮体分形维数为1.733。在絮凝效能对比实验中,PAC-P(AM-BA)的平均除油率为90.3%,较阳离子聚丙烯酰胺(CPAM)和复配型絮凝剂(PAC+PAM)分别高出16.4%和29.0%。

关键词：自由基胶束聚合法无机-有机杂化高分子絮凝剂聚丙烯酰胺絮凝

政府与体育社会组织合作治理研究--基于英格兰“政府与志愿部门合作协议”

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湖北体育科技 2024年第1期43卷 41-46,77页

作者：张润晨张峰瑞柳雨欣苏州大学体育学院江苏苏州215008 常熟理工学院体育部江苏苏州215500

体育社会组织日益成为体育治理的重要主体,但政府与体育社会组织在合作治理实践过程中存在组织属性、价值取向方面的差异,主体之间的权责边界、资源分配、监管反馈仍需要进一步明确。采用文献资料、逻辑分析及实证分析法,对英格兰1998至... 详细信息

体育社会组织日益成为体育治理的重要主体,但政府与体育社会组织在合作治理实践过程中存在组织属性、价值取向方面的差异,主体之间的权责边界、资源分配、监管反馈仍需要进一步明确。采用文献资料、逻辑分析及实证分析法,对英格兰1998至2018年共4版“政府与志愿及社区组织关系协定”的背景、内容、运行机制、合作网络进行分析。研究发现英格兰政社合作框架的历史嬗变过程可划分为雏形构建、改革发轫、转型提升以及成熟推广阶段,梳理其政社合作治理的运行机制发现多元主体参与、协议程序透明、建立共享机制是形成政府与社会力量合力共进的运行基础,并提出政社合作有关模式、结构及运营的发展建议:借助契约开辟联动通路,促进服务供给效能提升;打造软硬约束治理模式,健全政社合作治理网络;凝聚合作力量聚点围圆,共创互补关系实现善治。

关键词：体育治理体育社会组织合作协议政社合作