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Li-ion battery material under high pressure:amorphization and enhanced conductivity of Li4Ti5O12

National Science Review 2019年第2期6卷 239-246页

作者： Yanwei Huang Yu He Howard Sheng Xia Lu Haini dong Sudeshna Samanta Hongliang dong Xifeng Li Duck Young Kim Ho-kwang Mao Yuzi Liu heping Li Hong Li Lin Wang Center for High Pressure Science and Technology Advanced Research College of Materials and Environmental Engineering Hangzhou Dianzi University Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior Institute of Geochemistry Chinese Academy of Sciences Department of Physics and Astronomy George Mason University State Key Laboratory of Organic-Inorganic Composites Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Energy Beijing University of Chemical Engineering School of Mechatronic Engineering and Automation Shanghai University Geophysical Laboratory Carnegie Institution Center for Nanoscale Materials Argonne National Laboratory Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences

Lithium titanium oxide(Li4Ti5O12,LTO),a‘zero-strain’anode material for lithium-ion batteries,exhibits excellent cycling ***,its poor conductivity highly limits its ***,the structural stability and conductivity of LTO were studied using in situ high-pressure measurements and first-principles *** underwent a pressure-induced amorphization(PIA)at 26.9 *** impedance spectroscopy revealed that the conductivity of LTO improved significantly after amorphization and that the conductivity of decompressed amorphous LTO increased by an order of magnitude compared with its starting ***,our calculations demonstrated that the different compressibility of the Li O6and Ti O6octahedra in the structure was crucial for the *** amorphous phase promotes Li+diffusion and enhances its ionic conductivity by providing defects for ion *** results not only provide an insight into the pressure depended structural properties of a spinel-like material,but also facilitate exploration of the interplay between PIA and conductivity.

关键词： high pressure pressure-induced amorphization lithium-ion battery materials ionic conductivity

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Differences of Soil Nutrient Contents under Different Land Use Patterns in Niyang River Basin

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Agricultural Biotechnology 2022年第2期11卷 80-84页

作者： heping MA Zhu dong Institute of Tibet Plateau Ecology Agriculture&Animal Husbandry UniversityNyingchi 860000China National Key Station of Field Scientific Observation&Experiment Nyingchi 860000China Tibet Key Laboratory of Forest Ecology in Plateau Area Nyingchi 860000China

[Objectives]This study was conducted to investigate the variation characteristics of soil nutrient contents under different land use patterns in the middle and upper reaches of the Niyang River in Tibet.[Methods]With the cultivated land,grass land and forest land in the middle and upper reaches of the Niyang River as the research objects,216 soil samples were collected in layers(0-10,10-20,20-30 cm)by the standard sampling method,and the soil total nitrogen,alkali-hydrolyzable nitrogen,total potassium,available potassium,total phosphorus,available phosphorus and organic matter were determined.[Results]The contents of soil organic matter,total nitrogen and alkali-hydrolyzable nitrogen in the middle and upper reaches of Niyang River in Tibet ranked as forest land>grass land>cultivated land,and there were significant differences between the three(Pgrass land>cultivated *** distribution of soil total nutrients and available nutrients under different land use patterns showed a certain degree of surface *** contents of total nutrients and available nutrients in the soil at the 0-10 cm depth were significantly higher than those at 10-20 and 20-30 cm,and there were significant differences between the three(P<0.05).The average content of alkali-hydrolyzable nitrogen was the largest in forest soil and the smallest in cultivated land under the three land use patterns in the study *** average content of soil available phosphorus in cultivated land(19.47 mg/kg)was significantly higher than those in grass land(5.73 mg/kg)and forest land(5.19 mg/kg).The above results indicate that long-term vegetation restoration can improve the soil quality of the middle and upper reaches of the Niyang River.[Conclusions]The results of this study research provide basic support for improving the soil effect in the

关键词： Soil nutrient Land use type Soil quality Available nutrient Tibet

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FHR治疗高龄不稳定型股骨粗隆间骨折患者围术期隐性失血量及其临床意义

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中国医药导刊 2019年第4期21卷 197-201页

作者：董鹤萍黄伟杰华炯戴明华薛建武吴洪亮杨中良上海市浦东新区浦南医院骨科上海200125 上海国龙医院骨科上海201318 上海国龙医院综合ICU 上海201318

目的:分析生物型人工股骨头置换(FHR)治疗高龄不稳定型股骨粗隆间骨折患者围术期隐性失血量及其临床意义。方法:选取2013年1月至2017年6月我院165例实施手术治疗的高龄不稳定型股骨粗隆间骨折患者作为研究对象,其中生物型FHR组患者68例... 详细信息

目的:分析生物型人工股骨头置换(FHR)治疗高龄不稳定型股骨粗隆间骨折患者围术期隐性失血量及其临床意义。方法:选取2013年1月至2017年6月我院165例实施手术治疗的高龄不稳定型股骨粗隆间骨折患者作为研究对象,其中生物型FHR组患者68例,股骨近端防旋髓内钉手术(PFNA)组患者97例。FHR组患者根据术后1周复查血红蛋白(Hb)水平,分为高Hb亚组(≥9 g·dL^(-1))和低Hb亚组(<9 g·dL^(-1))。比较FHR组和PFNA组患者围术期总失血量、隐性失血量、术中出血量、手术时间、手术切口长度、下床时间及髋关节功能优良率的差异。对高Hb亚组和低Hb亚组的Hb量、红细胞压积(Hct)、院内感染、术后1个月和12个月髋关节Harris评分及功能独立性评定(FIM)评分进行分析比较。结果:FHR组患者围术期总失血量、隐性失血量、术中出血量、手术时间及手术切口长度均大于/长于PFNA组,而下床时间短于PFNA组,P<0.01。FHR组与PFNA组患者的隐性失血量均占总失血量的60%以上。FHR组患者中低Hb亚组院内感染率高于高Hb亚组,低Hb亚组术后1周Hb和Hct水平、术后1个月和12个月的Harris评分及FIM评分均低于高Hb亚组,P<0.01。结论:FHR治疗高龄不稳定型股骨粗隆间骨折疗效快,但总失血量高于PFNA组患者,其中隐性失血量占总失血量的60%以上。术后中重度贫血(<9 g·dL^(-1))患者院内感染率增高,影响了髋关节功能的恢复。围术期定期监测Hb有助于及时发现并纠正贫血,改善患者的预后。

关键词：股骨粗隆间骨折股骨近端防旋髓内钉(PFNA) 股骨头置换术(FHR) 隐性失血量院内感染

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Visualizing Seizure Propagation in Freely-moving Mice via Miniature Two-photon Microscopy

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Neuroscience Bulletin 2022年第12期38卷 1593-1597页

作者： Zhuoran Zhang Shihe Jiang Kaibin Shi Yan Li Wei‑Na Jin Qiang Liu Ting Zhao heping Cheng Fu‑dong Shi Department of Neurology Tianjin Medical University General HospitalTianjin 300052China Center for Neurological Diseases China National Clinical Research Center for Neurological DiseasesBeijing Tiantan HospitalCapital Medical UniversityBeijing 100070China Nanjing Brain Observatory PKU-Nanjing Institute of Translational MedicineNanjing 211899China State Key Laboratory of Membrane Biology Institute of Molecular MedicinePeking-Tsinghua Center for Life SciencesCollege of Future TechnologyPeking UniversityBeijing 100091China

DearEditor,Due to the tight and precise associations between behaviors and neural activities,the investigation of neuronal activity in freely-movingand behavinganimals isamajor unaccomplished goal in *** seizures,characterized by hyper-synchronized discharges and hyper-excitation in neuronal networks,are one of the most common neurological disorders.

关键词： moving precise excitation

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Literature Analysis of Bryophytes in China during 2005-2015

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Asian Agricultural Research 2017年第8期9卷 59-61页

作者： Yulong SHI heping MA dong ZHU Research Institute of Plateau Ecology Tibet Agricultural and Animal Husbandry College

In order to study China's bryophyte,this paper uses bibliometrics for statistical analysis of literature about China's bryophyte during *** results show that in terms of published article distribution of different journals,there are 13 kinds of journals with more than 5 papers about bryophyte,accounting for 32.5%; in terms of the number of papers published in different years,it was smallest in 2005,only 16,while it reached the largest number of 33 in 2008; in terms of the number of papers published for different first authors,there are most authors publishing less than 9 papers,accounting for 87.5%,there is only one author publishing 9 papers,and there are 5 people publishing more than 9 papers; in terms of author unit distribution,in the 278 articles collected,there are 12 units publishing papers of less than 6,accounting for 30%,the unit publishing the most papers(36) is Guizhou Normal University,5 units publish 6 papers,accounting for 12.5%,and the units publishing papers of less than 6 account for 57.5%; in terms of literature research level,there are most papers about basic and applied basic research(natural science),accounting for 91.2%,the papers about engineering and technology(natural science) account for 5.5%,and other papers account for 3.3%.

关键词： Bryophyte Bibliometrics Literature analysis Classification statistics

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Advances in TiS2 for energy storage, electronic devices, and catalysis:A review

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Progress in Natural Science:Materials International 2023年第2期33卷 133-150页

作者： Yunhong Jiang heping Xie Lu Han Yuan Zhang Yanhuai Ding Suling Shen Bin Chen Meng Ni Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyShenzhen University School of High Temperature Materials and Magnesite Resources Engineering University of Science and Technology Liaoning Department of Building and Real Estate Research Institute for Sustainable Urban Development The Hong Kong Polytechnic University Institute of Rheological Mechanics Xiangtan University

As the lightest family member of the transition metal disulfides(TMDs), TiS2has attracted more and more attention due to its large specific surface area, adjustable band gap, good visible light absorption, and good charge transport properties. In this review, the recent state-of-the-art advances in the syntheses and applications of TiS2in energy storage, electronic devices, and catalysis have been summarized. Firstly, according to the physical presentation of the TiS2synthesis reaction, it can be divided into a solid phase synthesis, a liquid phase synthesis and a gas phase synthesis. Secondly, we summarize the applications of TiS2in energy storage, electronic devices and catalytic:(1) The applications of TiS2nanostructure in energy storage direction from the aspects of Li-ion battery(LIB), Li–S battery(LSB), Na-ion battery(NIB), K-ion battery(KIB), Mg-ion battery(MIB), solar cells and hydrogen storage;(2) The applications of TiS2nanostructures in various electronic devices from thermoelectric devices, high power lasers and flexible devices;(3) Applications based on energy catalysis and environmental catalysis. Based on the various synthetic technologies and wide applications of TiS2, we firmly believe that the challenges of TiS2will be solved and become a hot star material in the future. Finally, we discuss the future scope and the current challenges arising from this fascinating material.

关键词： TiS2 Morphology control Energy storage and conversion Electronic devices Catalysis

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Study on Bryophytes in Sygara Mountain

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Asian Agricultural Research 2017年第10期9卷 55-57,62页

作者： Yulong SHI Xiaotong SONG Zhu dong heping MA Research Institute of Plateau Ecology Tibet Agricultural and Animal Husbandry College College of Resources and Environmental Sciences China Agricultural University

In order to identify the species of bryophytes in Sygara Mountain in Tibet,2390 samples in the area were collected,identified and analyzed. The results show that bryophytes of Sygara Mountain have 26 families,70 genera and 134 species; among them,25 families,69 genera and 133 species are mosses,and only one is liverwort,namely Conocephalum conicum( L.) Dum. 4 dominant families are in the descending order of Bryaceae,Dicranaceae,Pottiaceae,Polytrichaceae respectively,and the dominant genera are Hypnum,Brachythecium,Plagiomnium,Racomitrium and Dicranodontium.

关键词： Bryophytes Species Ecosystem Sygara Mountain Tibet

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基于南黄海盆地海相油气的海洋立体宽线地震勘探技术设想

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海洋地质前沿 2012年第8期28卷 56-60页

作者：吴志强肖国林董贺平刘怀山童思友国土资源部海洋油气资源与环境地质重点实验室青岛266071 青岛海洋地质研究所青岛266071 中国海洋大学海洋地球科学学院青岛266036

南黄海盆地中—古生代海相碳酸盐岩具有良好的油气前景,由于埋藏深、厚度大、构造复杂等特殊地震地质条件的原因,地震原始资料品质差,严重地制约了勘探进程。综合常规宽线和上下缆勘探技术的优势,提出了海洋立体宽线(MTBL)地震勘探新技... 详细信息

南黄海盆地中—古生代海相碳酸盐岩具有良好的油气前景,由于埋藏深、厚度大、构造复杂等特殊地震地质条件的原因,地震原始资料品质差,严重地制约了勘探进程。综合常规宽线和上下缆勘探技术的优势,提出了海洋立体宽线(MTBL)地震勘探新技术设想,对其改善地震资料品质的作用和优势进行了分析,为南黄海海相油气地震的勘探工作者提供了参考。

关键词：南黄海海相油气海洋立体宽线

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契达干酪成熟过程中游离钙、游离磷与其他指标的相关性研究

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食品与发酵工业 2008年第11期34卷 161-166页

作者：董莹董成张和平内蒙古农业大学乳品生物技术与工程教育部重点实验室内蒙古呼和浩特010018 河源出入境检验检疫局广东河源517000

研究了契达干酪成熟过程中游离钙/总钙、游离磷/总磷的变化,并与干酪成熟的标志性指标——蛋白质水解和质地(包括剪切力和硬度)变化的相关性进行了初步研究。研究结果表明:在干酪成熟过程中,游离钙/总钙与WSN/TN在P<0.001水平下正相关,... 详细信息

研究了契达干酪成熟过程中游离钙/总钙、游离磷/总磷的变化,并与干酪成熟的标志性指标——蛋白质水解和质地(包括剪切力和硬度)变化的相关性进行了初步研究。研究结果表明:在干酪成熟过程中,游离钙/总钙与WSN/TN在P<0.001水平下正相关,与剪切力和硬度在P<0.001水平下负相关;游离磷/总磷与WSN/TN在P<0.001水平下负相关,与剪切力和硬度分别在P<0.001和P<0.01水平下正相关。

关键词：契达干酪成熟过程游离钙游离磷

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基于全保偏光纤激光器的单通光参量中红外超短脉冲激光系统

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光学学报 2021年第12期41卷 251-255页

作者：董文乾郝强黄坤曾和平上海理工大学光电信息与计算机工程学院上海200093 华东师范大学精密光谱科学与技术国家重点实验室上海200062 济南量子技术研究院山东济南250101

实验验证了基于全保偏光纤的单通光参量中红外(MIR)超短脉冲产生方案。基于全光纤主振荡功率放大(MOPA)结构,获得了平均功率为2.4 W、脉冲宽度为48.85 ps、中心波长为1029.75 nm的可调重复频率近红外脉冲。当系统重复频率为100 kHz时,... 详细信息

实验验证了基于全保偏光纤的单通光参量中红外(MIR)超短脉冲产生方案。基于全光纤主振荡功率放大(MOPA)结构,获得了平均功率为2.4 W、脉冲宽度为48.85 ps、中心波长为1029.75 nm的可调重复频率近红外脉冲。当系统重复频率为100 kHz时,近红外脉冲的峰值功率可达491 kW。利用该近红外脉冲泵浦MgO-PPLN晶体,当入射脉冲的平均功率为608.9 mW时,获得了平均功率为66.13 mW的中红外皮秒脉冲,相应的峰值功率为13.5 kW。通过调控晶体的反转周期和温度,可实现3180~3976 nm的可调波长输出。该方案具有结构简单、稳定度高的特点。

关键词：激光技术超短脉冲光纤激光器光参量产生中红外激光

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