演讲题目：What could be better than graphene for energy storage?
主题会场石墨烯在新能源领域的应用
开始时间2017-09-24 09:30:00
结束时间2017-09-24 10:00:00
内容摘要
Carbon materials and transition metal oxides have been and are widely used as active materials in electrodes form lithium ion batteries (LIBs) to supercapacitors. Each of these types of materials present well known advantages and drawbacks. Oxides feature their versatile redox chemistry to dominate the realm of batteries, whereas carbons display a series of intrinsic advantages as high surface area capacitive electrodes in supercapacitors. Among nanocarbons, graphene is the advanced material of choice for years to come thanks to its unique combination of mechanical, thermal, electrical, optical and chemical properties and potentially optimal active area for capacitive double-layer storage. What then could be better than graphene for energy storage? Well, what about a combination of graphene and electroactive species?
Hybrid materials offer the opportunity of building synergies thus leading to improved performance over their individual components.[1] In that way, hybrids based on graphene and a variety of molecular species[2-4] or extended phases[4] have been used to design materials with enhanced activity. A wise choice of electroactive species can for instance improve the energy density of graphene-based supercapacitors through hybridization. Furthermore, in our group we have gone beyond the conventional solid state electrode format and have developed graphene electroactive nanofluids as liquid electrodes for flow cells. This novel electrode format is also prone to the development of hybrid materials. In this conference this general hybrid approach will be discussed, including hybrid materials as well as hybrid devices[7, 9], and illustrative examples from recent results in our laboratory will be presented.
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