Self-Templated Synthesis of Hierarchically Porous N-Doped Carbon Derived from Biomass for Supercapacitors
Self-Templated Synthesis of Hierarchically Porous N-Doped Carbon Derived from Biomass for Supercapacitors
复制标题
用于超级电容器的生物质衍生的分级多孔氮掺杂碳的自模板合成
DOI：
10.1021/acssuschemeng.8b02255
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发表时间：
2018-11-05
影响因子：
8.4
通讯作者：
Liu, Meilin
中科院分区：
文献类型：
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作者：
Wang, Yameng;Liu, Ting;Liu, Meilin
通过在纤维素纳米晶体（CNC）上原位生长ZIF-8（沸石咪唑酯骨架）纳米颗粒，合成了具有螺旋排列的棒状结构的分级多孔氮掺杂碳（HPNC），其同时充当自模板和碳源，并控制ZIF-8涂覆的CNC的生长和随后的碳化。由于HPNC的新颖结构特征和令人满意的化学组成，其在100 mA/g下表现出172 F/g的改进电容，在50 W/kg和5000 W/kg的功率密度下分别表现出23.75 Wh/kg和14.58 Wh/kg的优异上级能量密度，在KOH水溶液中循环稳定性好（5000次循环后保持率为94.5%）。此外，对称超级电容器的构建和显示显着增加的电化学性能，表现出高比容量（100 F/g在0.2 A/g和1074 F/g在5.0 A/g，分别），令人印象深刻的速率性能（100 F/g在10 A/g），和与…
Hierarchically porous nitrogen-doped carbon (HPNC) with a helically arranged rodlike structure has been synthesized by in situ growth of ZIF-8 (zeolitic imidazolate frameworks) nanoparticles on cellulose nanocrystals (CNC), which simultaneously acts as both a self-template and a carbon source, and controls the growth of ZIF-8 coated CNC, and a subsequent carbonization. Because of the novel structural characteristic and satisfying chemical composition of the HPNC, it exhibits an improved capacitance of 172 F/g at 100 mA/g, superior energy density of 23.75 Wh/kg at a power density of 50 W/kg and 14.58 Wh/kg at 5000 W/kg, respectively, and long cycling stability (retention 94.5% after 5000 cycles) in aqueous KOH solution. Further, a symmetric supercapacitor is constructed and displays significantly increased electrochemical performance, demonstrating high specific capacity (∼100 F/g at 0.2 A/g and ∼74 F/g at 5.0 A/g, respectively), impressive rate performance (∼70 F/g at 10 A/g), and excellent stability with...