3D Porous Oxygen-Doped and Nitrogen-Doped Graphitic Carbons Derived from Metal Azolate Frameworks as Cathode and Anode Materials for High-Performance Dual-Carbon Sodium-Ion Hybrid Capacitors

被引:26
|
作者
Jung, Yong Min [1 ]
Choi, Jong Hui [1 ]
Kim, Dong Won [1 ]
Kang, Jeung Ku [1 ]
机构
[1] Korea Adv Inst Sci & Technol KAIST, Nano Century Inst, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South Korea
基金
新加坡国家研究基金会;
关键词
dual-carbon sodium-ion hybrid capacitors; high energy densities; fast chargeable power densities; and robust cycle stabilities; metal-azolate frameworks; porous nitrogen-doped graphitic carbon anodes; ultrahigh surface area porous oxygen-doped graphitic carbon cathodes; ORGANIC FRAMEWORK; ADSORPTION; DENSITY;
D O I
10.1002/advs.202301160
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Sodium-ion hybrid capacitors (SIHCs) in principle can utilize the advantages of batteries and supercapacitors and satisfy the cost demand of large-scale energy storage systems, but the sluggish kinetics and low capacities of its anode and cathode are yet to be overcome. Here, a strategy is reported to realize high-performance dual-carbon SIHCs using 3D porous graphitic carbon cathode and anode materials derived from metal-azolate framework-6s (MAF-6s). First, MAF-6s, with or without urea loading, are pyrolyzed to synthesize MAF-derived carbons (MDCs). Then, cathode materials are synthesized via the controlled KOH-assisted pyrolysis of MDCs (K-MDCs). K-MDCs, 3D graphitic carbons, resulting in a record-high surface area (5214 m(2) g(-1)) being approximate to four-fold higher than pristine MAF-6, oxygen-doped sites for high capacity, rich mesopores affording fast ion transport, and high capacity retention over 5000 charge/discharge cycles. Moreover, 3D porous MDC anode materials are synthesized from N-containing MAF-6 and exhibited to allow cycle stability over 5000 cycles. Furthermore, dual-carbon MDC//K-MDC SIHCs with different loadings (3 to 6 mg cm(-2)) are demonstrated to achieve high energy densities exceeding those of sodium-ion batteries and supercapacitors. Additionally, it allows an ultrafast-chargeable high power density of 20000 W kg(-1) and robust cycle stability overcoming those of a typical battery.
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页数:12
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