A positive-temperature-coefficient electrode with thermal protection mechanism for rechargeable lithium batteries

A new positive-temperature-coefficient(PTC) material was prepared simply by blending of conductive Super P carbon black(CB) with insulating poly(methyl methacrylate)(PMMA) polymer matrix,which was empolyed as a coating layer on the aluminium foil substrate to fabricate a sandwiched Al/PTC/LiCoO2 cathode.The experimental results from cyclic voltammetry,charge-discharge measurements and impedance spectroscopy demonstrated that the PTC electrode has a normal electrochemical performance at ambient temperature,but shows an enormous increase in the resistance at the temperature range of 80?120℃.This PTC behavior greatly restrains the reaction current passing through the electrode at elevated temperatures,capable of acting as a self-actuating safety mechanism to prevent the battery from thermal runaway.     

浅析确保高危客户安全用电的措施

分析了煤矿高危客户安全用电方面存在的问题,并提出了相应的解决办法。     

浅谈建设工程安全监理工作要点

从事故多发的环节出发,全面阐述了安全监理工作的相关要点,包括安全监理的必要性、监理依据、监理程序、监理内容等.     

基于层次分析法的我国煤矿安全监察体系探析

采用层次分析法，建立了煤矿安全监察体系影响因素层次分析模型；分析了影响构建完善的安全监察体系的主要因素；确定了各因素的权重系数，对其进行计算、分析和排序。结果表明：可操作性强、完善的法律体系和行政机构的建立、安全文化的普及和安全技术的实践应用在影响因素中的权重最为突出。最后还提出了一些解决问题的建议。     

The analysis of the legislation on health and safety in Britain

Health and safety is an integral feature of work and employment relations. The consequences of ill-health and danger have an untold impact on workers,on their personal life,on those who enter employment settings,and on the provision of services and goods. In a variety of ways,people attempt to establish minimum standards of danger and hazard to deal with these consequences in their workplace. This essay will firstly review and assess the important issues in the development of the legislation on health and safety at work in Britain,and then analyze the recent situation on health and safety at work in Britain according to some statistics and examples. Finally,it will conclude that Business will benefit from good management of health and safety at work.     

浅谈交通安全设施施工质量监理

文章论述了交通安全设施的施工质量监理控制要点,从波形梁护栏监理的重点是成型构件进场的检验和安装后成品的检验验收,到安装开工报告的审查;并对交通标志牌监理工作的重点和难点、材料进场的检验和安装后的验收等作了较详细的论述。     

对高校数字图书馆与远程教育服务的思考

针对数字图书馆的特点,分析了数字图书馆在远程教育中具有的优势,探讨了数字图书馆在远程教育过程中存在的不足,论述了数字图书馆在远程教育发展中应注意的诸如设立权威的远程教育管理机构、致力于解决远程教育的"信息孤岛"等问题,提出了加强和改进数字图书馆服务远程教育的策略.     

浅谈建筑企业安全生产管理

由于建筑工程隐患多,使得建筑施工成为高风险行业,为了保证安全目标的顺利实现,建筑施工企业要建立安全生产责任制、建立健全安全组织机构、做好安全生产投入与安全技术措施计划、安全生产教育培训的实际工作、安全生产的检查工作.     

高校实验室的安全隐患与规制对策——以广东省高校医学实验室为例

以广东省五所高校部分医学专业本科生为样本，采用问卷调查、访谈等形式收集第一手数据，在此基础上进行统计分析，了解、研究当今高校医学实验室安全隐患，进而就安全隐患提出了加强实验室安全教育、完善实验室硬件设施、健全损害补偿机制等规制对策。     

减少煤矿瓦斯事故中人员伤亡的对策和建议

针对煤矿瓦斯事故中大量人员伤亡的现状,分析了造成人员伤亡多的原因,并提出了有效减少事故人员伤亡的对策和建议.