A General Eco-friendly Production of Bio-sources Derived Micro-/Mesoporous Carbons with Robust Supercapacitive Behaviors and Sodium-Ion Storage

被引:52
作者
Chen, Zhiyi [1 ,2 ]
Sun, Jinfeng [1 ]
Bao, Ruiqi [2 ]
Sun, Xuan [1 ]
Zhang, Jinyang [1 ]
Hou, Linrui [1 ]
Yuan, Changzhou [1 ,2 ]
机构
[1] Univ Jinan, Sch Mat Sci & Engn, 336 Nanxinzhuang West Rd, Jinan 250022, Shandong, Peoples R China
[2] Anhui Univ Technol, Sch Mat Sci & Engn, 59 Hudong Rd, Maanshan 243002, Peoples R China
基金
中国国家自然科学基金;
关键词
Biomass-derived carbons; KHCO3; activator; Eco-friendly fabrication; Supercapacitors; Sodium-ion batteries; HIGH-ENERGY-DENSITY; DOPED POROUS CARBON; ELECTRODE-MATERIALS; ACTIVATED CARBON; ANODE MATERIALS; NITROGEN; NANOSHEETS; PHOSPHORUS; LITHIUM; LEAVES;
D O I
10.1021/acssuschemeng.8b04408
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Recently, biomass-derived carbons (BDCs) have attracted great attention as energy storage materials due to their congenital advantages. However, green and moderate activation protocols for advanced BDCs are still challengeable. Herein, we devised a scalable, yet general, strategy to fabricate a series of porous BDCs via direct activation of various abundant biomass resources by using KHCO3 as eco-friendly activator. The BDCs activated by KHCO3 exhibited even better electrochemical behaviors than other activators. More encouragingly, the optimized shiitake mushroom derived carbon (C-KHCO3) was endowed with a surface area of 1788.1 m(2) g(-1), average pore size of 2.5 nm, high-content N (1.3 at. %), and mass density of 0.62 g cm(-3). When evaluated as electrodes for supercapacitors, our fabricated electrode (5 mg cm(-2)) in a three-electrode configuration exhibited competitive capacitance of 354.8 F g(-1) (220.0 F cm(-3)) at a rate of 1.0 A g(-1) in 1 M H2SO4. Furthermore, the organic C-KHCO3//C-KHCO3 symmetric capacitor delivered an energy density of 55.2 Wh kg(-1) (34.2 Wh L-1) at 1250 W kg(-1), and long-duration cycling performance. Moreover, the resultant C-KHCO3 was also highlighted with remarkable Na+-storage behaviors. Promisingly, the methodology here shows attractive superiorities in cost efficiency, good universality and scalability to commercial levels of BDCs for energy-related applications.
引用
收藏
页码:779 / 789
页数:21
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