材料科学
石墨烯
储能
纳米复合材料
超级电容器
电容器
锐钛矿
纳米技术
电化学
化学工程
介孔材料
阴极
电极
电压
化学
电气工程
功率(物理)
工程类
催化作用
物理化学
生物化学
物理
光催化
量子力学
作者
Zaiyuan Le,Fang Liu,Ping Nie,Xinru Li,Xiaoyan Liu,Zhenfeng Bian,Gen Chen,Hao Bin Wu,Yunfeng Lu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2017-03-15
卷期号:11 (3): 2952-2960
被引量:542
标识
DOI:10.1021/acsnano.6b08332
摘要
Sodium-ion capacitors can potentially combine the virtues of high power capability of conventional electrochemical capacitors and high energy density of batteries. However, the lack of high-performance electrode materials has been the major challenge of sodium-based energy storage devices. In this work, we report a microwave-assisted synthesis of single-crystal-like anatase TiO2 mesocages anchored on graphene as a sodium storage material. The architecture of the nanocomposite results in pseudocapacitive charge storage behavior with fast kinetics, high reversibility, and negligible degradation to the micro/nanostructure. The nanocomposite delivers a high capacity of 268 mAh g–1 at 0.2 C, which remains 126 mAh g–1 at 10 C for over 18 000 cycles. Coupling with a carbon-based cathode, a full cell of sodium-ion capacitor successfully demonstrates a high energy density of 64.2 Wh kg–1 at 56.3 W kg–1 and 25.8 Wh kg–1 at 1357 W kg–1, as well as an ultralong lifespan of 10 000 cycles with over 90% of capacity retention.
科研通智能强力驱动
Strongly Powered by AbleSci AI