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新型电池科学与技术系列讲座25

发布时间:2016年 10月 17日 08时 02分 编辑: 点击量:280

报告题目  Zero- to Three-Dimensional Carbon-Based Materials for Energy Storage

报告人     Prof.Yury Gogotsi

工作单位吉林大学物理学院"外专千人"专家,Associate Editor, ACS Nano  

报告时间 2016年10月20日下午2:00-4:00(星期一)

报告地点: 物理楼333讲学厅

Abstract

This lecture provides a brief summary of carbon use in electrical energy storage.  The main message is that the success in increasing both, the energy stored by the device and its power, can be achieved by combining the right carbon (nano) structure with a proper electrolyte.  
There is no perfect carbon material and no electrolyte to suit every performance goal. However, a large variety of nanostructured carbon materials are available nowadays. The exciting world of carbon materials includes 0-, 1-, 2- and 3D structures. Zero- and one-dimensional nanoparticles, such as onion-like carbon and nanotubes, can provide a high power due to fast ion sorption/desorption on their outer surfaces. Two-dimensional graphene has been receiving an increasing attention due to its higher charge-discharge rates compared to porous carbons and high volumetric energy density. Three-dimensional porous activated, carbide-derived and templated carbon networks, having a high surface area and porosity in the subnanometer or a few-nanometers range, can provide high energy density if the pore size is matched with the electrolyte ion size. While aqueous electrolytes, such as sodium sulfate, are the safest and least expensive, they have a limited voltage window. Organic electrolytes are the most commonly used ones in commercial devices. Non-flammable ionic liquids are attracting an increasing attention due to their low vapor pressure leading to a safe operation in the range from -50°C to at least 100°C and a larger voltage window resulting in a higher energy density compared to other electrolytes. Further advances in development of materials and understanding charged solid-electrolyte interfaces are expected to lead to a wider use of capacitive energy storage at the scales ranging from microelectronics to automobiles and electrical grid. 
主办单位:
新型电池物理与技术教育部重点实验室
吉林大学物理学院