Low temperature electrolytes for Li-MnO_2 batteries

研究了电解质盐为lIClO4的一系列新型电解液体系,在-40~25℃温度区间内,测定了各体系的离子电导率,并进行比较。选择电导率较好的1MOl/llIClO4/PC/MA(1∶3)电解液体系组装成扣式lI-MnO2电池,进行常温和低温放电性能的测试,并与使用常用电解液体系1MOl/llIPf6/EC/dMC(1∶1)及1MOl/llIClO4/PC/dME/dOl(1∶1∶1)的lI-MnO2的常温和低温放电性能进行了比较。探讨了电解液低温电导率提高的机理,特别是线性羧酸酯的加入对电解液低温电导率和放电性能的影响。In this paper, ionic conductivity of a series of LiClO4-based electrolytes was measured from-40 ℃ to 25 ℃.A comparison of the discharge performance of Li-MnO2 batteries which used different electrolytes including 1 mol/L LiClO4/PC/MA(1∶3), 1 mol/L LiClO4/PC/DME/DOL(1∶1∶1) and 1 mol/L LiPF6/EC/DMC(1∶1) was made.It is found that the electrolyte:1 mol/L LiClO4/PC/MA(1∶3), shows good ionic conductivity both at room temperature and low temperatures.Moreover, the mechanisms of improving the low temperature conductivity of the electrolytes and particularly, the effects of adding linear carboxylate on the conductivity and discharge performance were discussed

STUDY ON THE LITFSI-BASED ELECTROLYTES FOR Li/MnO_2 BATTERIES

为改善lI/MnO2电池的低温放电性能,制备了一系列新型lITfSI系电解液,并且溶剂中加入适量乙酸甲酯.研究结果表明,电解液lITfSI(1 MOl/l)/PC∶dME∶EC∶MA是一种较好的体系.To improve the discharge performance of Li/MnO2 batteries at low temperatures,a series of new LiTFSI-based electrolytes were prepared.The methyl acetate was added into the mixed solvent.The experiments indicate that the LiTFSI(1 mol/L)PC∶DME∶EC∶MA(1∶1∶1∶3) is a good electrolyte

锂离子电池低温性能改善研究进展

锂离子电池因其能量密度高,循环寿命长等优点已成为新型动力电池领域的研究热点,但其温度特性尤其是低温性能较差制约着锂离子电池的进一步使用.本文综述了锂离子电池低温性能的研究进展,系统地分析了锂离子电池低温性能的主要限制因素.从正极、电解液、负极三个方面讨论了近年来研究者们提高电池低温性能的改性方法.并对提高锂离子电池低温性能的发展方向进行了展望.国家重点研发计划(No.2018YFB010400);;福建省高校产学合作项目(No.2018H6020)资

ST段抬高型急性心肌梗死院前溶栓治疗中国专家共识

急性心肌梗死仍然严重威胁我国人民健康,在我国广大城乡地区,形势更为严峻[1,2]。及时救治急性心肌梗死患者,降低死亡率和保护心脏功能刻不容缓。鉴于我国的实际情况,院前溶栓治疗在大城市以外的城乡地区具有重要意义。为此,中国医师协会胸痛专业委员会及中国医学救援协会心血管急救分会专门组织有关专家制订了本共识,旨在帮助院前医疗急救人员对急性心肌梗死患者选择最佳

Evaluation on difference of therapeutic efficacy of Jiawei Xiaoyao Granules and Pills in treatment of emotional disorder during perimenopause based on Greene Climacteric Scale

目的:在前期加味逍遥丸治疗围绝经期情绪障碍具有比较优势的基础上,基于grEEnE量表探讨其颗粒剂和丸剂不同剂型间疗效差异。方法:经筛选后患有情绪障碍的围绝经期女性75例随机等分为A、b、C3组,分别对应采用帕罗西汀、加味逍遥丸和加味逍遥颗粒剂治疗8周。所有患者在治疗前后各进行1次grEEnE及其子因子评定,并在观察期结束时进行TESS评定。结果:grEEnE总分差及其焦虑、抑郁因子分差:3种治疗方法均能改善,且相互间无显著差异;grEEnE性因子和血管因子分差:后二组均优于A组(P<0.01);TESS评分:与A组比较,b、C组均有统计学意义(P<0.01),评分均小于A组,且后二组间无显著差异。结论:加味逍遥的2种剂型间疗效无显著差异,考虑到帕罗西汀的不良反应,治疗该病加味逍遥的2种剂型都值得推荐。Objective: To investigate the difference in therapeutic efficacy between Jiawei Xiaoyao Granules and pills based on the preliminary research of treating emotional disorder during perimenopause with Jiawei Xiaoyao Pills and Greene Climacteric Scale.Methods: 75 female patients with emotional disorder during perimenopause were slected and randomly divided into 3 groups as group A, B and C.Patients in the 3 groups were treated with paroxetine, Jiawei Xiaoyao Pills and Jiawei Xiaoyao Granules respectively for 8 weeks.Greene and Greene factors assessment were carried out in all the patients before and after treatment, and the TESS assessment was carried out at the end of the observation period.Results: The three therapies all could improve the gap in total score of Greene and its factors as anxiety and depressed, and the difference among these three groups was no significant.The factors of Greene and gap in score of vascular factors of group B and C was better than that of group A(P<0.01).The difference in TESS score between group A and group B and C was significant(P<0.01), while the difference between group B and group C was not significant.Conclusion: The difference in curative effect between the two formulations was not significant.Because of the adverse reactions of paroxetine, in the treatment of emotional disorder during perimenopause, the two formulations of Jiawei Xiaoyao Powder were worth to be recommended.国家自然科学青年基金项目(No.81302960)~

An Analysis of the Evolution of China's Pension Policy

1980年前后随着市场化改革的进行,中国也开始了养老保险制度的改革①。自20世纪90年代建立部分基金制后,制度的转轨带来了前所未有的转轨成本和激励问题,这给羽翼未丰的中国养老保险制度带来了沉重的负担。文章透过中国养老保险制度的变迁,分析了不同时期不同利益集团是如何推动养老保险制度改革,分析了利益集团在当前情况下对下一步改革又会产生如何的影响。一种可行的养老保险制度的选择还有待进一步讨论。This paper reviews the evolution of China's pension reform.During the economic reform China's pension system is influenced by different interest groups.When facing large funding gaps and empty individual accounts,the system is imposed with heavy burden.We are finding how the interest groups could affect the next coming pension reform.China's selecting a feasible pension system calls for further discussions

中国体育科学学会会议论文集

&lt;正&gt;1研究目的已有研究常采用偏侧判断任务研究内隐运动表象。该任务要求被试判断不同旋转角度的目标刺激是左手还是右手。在这一任务中,被试对目标朝外时的反应时要比朝内的反应时更长,即朝向效应。但是目前对该效应产生的机制还有争议,存在两种假设:心理模拟假设和视觉机制假设。心理模拟假设认为,被试通过模拟自身的手部运动完成任务,而模拟目标朝外时的时间要比朝内的时间更长。视觉假设任务,朝向效应是可能是先天的视&nbsp;</p

Structure Design and Optimization of Manipulator for GIS Detection

针对GIS检测移动操作臂的作业要求,首次开展了一种五自由度操作臂的结构设计与优化。首先通过分析GIS检测的任务要求,完成操作臂构型尺度设计;假定均质杆件和集中负载,建立机械臂力学模型,基于抗弯截面系数的平方与截面面积的三次方比值最优完成主操作臂的截面形状和截面尺寸的设计;建立三维实体模型,基于有限元方法完成操作臂在不同工况下的应力分析,在此基础上,采用遗传算法对操作臂进行结构优化。优化后的结构尺寸使操作臂的质量明显减小且能够保证足够的强度和刚度

Clone of OsCHX1 Gene and Agrobacterium Mediated Transformation of the Gene into Rice

利用RT-PCR扩增水稻的Na+、K+/H+反向转运蛋白(OsCHX1)基因全序列,将其与35S启动子连接后,插入到p1301中,构建植物过量表达载体p1301-35S-OsCHX1-NOS.将该质粒转化农杆菌EHA105,并对水稻愈伤组织进行转化,获得了再生植株.对再生植株进行GUS和PCR鉴定,发现超过85%的再生植株为阳性植株.此研究结果为进一步探讨OsCHX1基因功能提供了实验材料.The full length of OsCHX1 gene was amplified by RT-PCR and pBPF-35S-OsCHX1 was constructed after ligating gene of OsCHX1 with pBPF.The Hind III digested fragment from pBPF-35S-OsCHX1 was inserted into p1301 and p1301-35S-OsCHX1-NOS was constructed.OsCHX1 gene was introduced into rice(Oryza Sativa Japonica cultivar Npponbare) by Agorbacterium mediated method.More than 100 seedlings regenerated from transformants were obtained.After detection by GUS stain and PCR it was found that OsCHX1 gene was transfered into rice genomes.福建省青年人才创新项目(2005J004)资