SBIR Phase I: High Power Density Ultracapacitor by Using Transition Metal Carbide/Nitride Fibers as Electrodes

基于诸如碳粉的固结粉末的超级电容器的电性能通常受到颗粒间电阻的限制。 因此，这需要添加导电性增强添加剂或专门的加工步骤。过渡金属碳化物/氮化物因其固有的高电子电导而闻名。为了降低颗粒间电阻，在第一阶段计划中，我们将使用溶胶-凝胶技术制造过渡金属碳化物/氮化物纤维电极。 纤维的微观结构将被定制以获得均匀的孔径分布和高的可及表面积。 由这种材料制成的超级电容器的功率密度预计将显着impoved由于低得多的等效串联电阻（ESR）。预期的好处/潜在的商业应用的研究或开发负载均衡的电动汽车或作为电源的汽车子系统，如启动器，再生制动和安全气囊。此外，便携式电子设备如笔记本电脑、手机等也将能够使用它作为主要或次要电源。关键词：过渡金属碳化物/氮化物，溶胶-凝胶工艺，纤维，高功率密度，高可及表面积，低ESR

Electrical performance of ultracapacitors based on consolidated powders such as carbon powders is often limited by interparticle electrical resistance. As a consequence, this requires the addition of conductivity enhancing additives or specialized processing steps. Transition metal carbide/nitride are known for their intrinsic high electronic conductance. To reduce the interparticle resistance, in this Phase I program, we are going to make transition metal carbide/nitride fiber electrodes using sol-gel technology. The microstructure of fibers will be tailored to obtain a uniform pore size distribution and high accessible surface area. The resulting power density of an ultracapacitor made of this material is expected to be notably impoved due to a much lower eqivalent series resistance (ESR).Anticipated Benefits/Potential Commercial Applications of the Research or Developement Load leveling for electric vehicle or as power source for automotive sub-systems such as starter, regenerative braking and air bag. In addition, portable electronic devices such as notebook computers, cellular phones will also be able to use it as primary or secondary power sources.Keywords:Transition metal carbide/nitride, Sol-gel process, fiber, high power density, high accessible surface area, low ESR