• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ACS National Meeting Exposition >GRAPHENE-NICKEL COBALTITE NANOCOMPOSITE ASYMMETRICAL SUPERCAPACITOR WITH COMMERCIAL LEVEL MASS LOADING
【24h】

GRAPHENE-NICKEL COBALTITE NANOCOMPOSITE ASYMMETRICAL SUPERCAPACITOR WITH COMMERCIAL LEVEL MASS LOADING

机译：石墨烯 - 镍钴罐纳米复合材料不对称超级电容器，具有商业水平质量荷载

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An electrochemical capacitor, also known as a supercapacitor or an ultracapacitor, stores energy via near-surface ion adsorption, with an additional possible contribution from fast reversible Faradic reactions [1-4]. Such devices can fill the gap between batteries and conventional solid state and electrolytic capacitors, providing a much higher power density and longer cycle life than the former, and a much higher energy density than the latter. High performance electrochemical capacitors are very important for electric vehicles and hybrid electric vehicles. Although high power uptake ～ 10 to 104 W kg~(-1)) can be achieved for electrochemical capacitors, their energy density (～ 0.2 to 10 Wh kg~(-1)) is significantly lower than those of batteries (～ 10 to 200 Wh kg~(-1)) [5]. Therefore, a key goal for the development of electrochemical capacitors is to improve their energy density while maintaining high power density and long cycle life. According to the following equation E=0.5CV2, where E is the energy density, C is the capacitance of electrochemical capacitor, and V is the cell voltage, the energy density of an electrochemical capacitor can be enhanced by either maximizing the specific capacitance or increasing the cell voltage [6]. A promising way to improve the cell voltage in aqueous-based electrochemical capacitors is to use asymmetric electrodes, where the oxygen evolution reaction on the oxide-based positive electrode is suppressed [7, 8].
机译：电化学电容器，也称为超级电容器或超级电容器，通过近表面离子吸附物储存能量，具有来自快速可逆法拉米反应的额外可能的贡献[1-4]。这种装置可以填充电池和传统固态和电解电容器之间的间隙，提供比前者更高的功率密度和更长的循环寿命，并且比后者更高的能量密度。高性能电化学电容器对电动汽车和混合动力电动汽车非常重要。虽然电化学电容器可以实现高功率摄取〜104 W kg〜（-1）），但它们的能量密度（〜0.2至10kg〜（-1））显着低于电池（〜10至200 wh kg〜（-1））[5]。因此，电化学电容器的开发的关键目标是提高它们的能量密度，同时保持高功率密度和长循环寿命。根据以下等式E = 0.5CV2，其中E是能量密度，C是电化学电容器的电容，并且V是电池电压，可以通过最大化特定电容或增加来提高电化学电容器的能量密度电池电压[6]。提高水性电化学电容器中的电池电压的有希望的方法是使用不对称电极，其中氧化氧基正电极上的氧气进化反应抑制[7,8]。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号