超级电容器
材料科学
杂原子
离子液体
储能
纳米孔
电极
化学工程
电解质
膜
电容
纳米技术
碳纤维
有机化学
复合材料
化学
催化作用
戒指(化学)
功率(物理)
物理化学
工程类
物理
复合数
量子力学
生物化学
作者
Weiyi Zhang,Shen Wei,Yongneng Wu,Yong‐Lei Wang,Miao Zhang,D. Roy,Hong Wang,Jiayin Yuan,Qiang Zhao
出处
期刊:ACS Nano
[American Chemical Society]
日期:2019-09-11
卷期号:13 (9): 10261-10271
被引量:47
标识
DOI:10.1021/acsnano.9b03514
摘要
High energy/power density, capacitance, and long-life cycles are urgently demanded for energy storage electrodes. Porous carbons as benchmark commercial electrode materials are underscored by their (electro)chemical stability and wide accessibility, yet are often constrained by moderate performances associated with their powdery status. Here via controlled vacuum pyrolysis of a poly(ionic liquid) membrane template, advantageous features including good conductivity (132 S cm-1 at 298 K), interconnected hierarchical pores, large specific surface area (1501 m2 g-1), and heteroatom doping are realized in a single carbon membrane electrode. The structure synergy at multiple length scales enables large areal capacitances both for a basic aqueous electrolyte (3.1 F cm-2) and for a symmetric all-solid-state supercapacitor (1.0 F cm-2), together with superior energy densities (1.72 and 0.14 mW h cm-2, respectively) without employing a current collector. In addition, theoretical calculations verify a synergistic heteroatom co-doping effect beneficial to the supercapacitive performance. This membrane electrode is scalable and compatible for device fabrication, highlighting the great promise of a poly(ionic liquid) for designing graphitic nanoporous carbon membranes in advanced energy storage.
科研通智能强力驱动
Strongly Powered by AbleSci AI