Supercapacitors, also known as electrochemical capacitors, can provide much?faster charge–discharge, greater power density, and cyclability than batteries,but they are still limited by lower energy densities (or the amount of energy
stored per unit volume). Here, a novel strategy for the synthesis of functional?pillared graphene frameworks, in which graphene fragments in-between?graphene sheets, through simple thermal-treatment of ozone (O 3 )-treated
graphene oxide at very low temperature of 200 °C is reported. Due to its?high packing density, high content of stable oxygen species, and continues?ion transport network in-between graphene sheets, the functional pillaredgraphene
framework delivers not only high gravimetric capacitance (353 F g ?1?based on the mass of the active material) and ultrahigh volumetric capacitance?(400 F cm ?3 based on total mass of electrode material) in aqueous?electrolyte but also excellent cyclic stability with 104% of its initial capacitance?retention after 10 000 cycles. Moreover, the assembled symmetric?supercapacitor achieves as high as 27 Wh L ?1 of volumetric energy density?at a power density of 272 W L ?1 . This novel strategy holds great promise for?future design of high volumetric capacitance supercapacitors.

影響因子
21.875
論文下載
作者

Lili Jiang,Lizhi Sheng,Conglai Long,Tong Wei and Zhuangjun Fan.

期刊

Advanced Energy Materials,5,1500771(2015)

年份
福建体彩十一选五开什么号 AS真人棋牌官网版下载 codol银河幸运转轮 江苏7位数中奖怎样领取 广东快乐10分开奖网 期货交易所 足球单场app 二月足彩胜负彩对阵表 世界棋牌游戏排行榜 上海天天彩4d开奖结果 百家乐网络_Welcome 比分预测世界杯么颜色值钱 牛牛游戏官网 内蒙古快3走势图下载 十一运夺金 期货风险 公式规律推荐二肖八码