Turning gelidium amansii residue into nitrogen-doped carbon nanofiber aerogel for enhanced multiple energy storage
Turning gelidium amansii residue into nitrogen-doped carbon nanofiber aerogel for enhanced multiple energy storage
复制标题
将石花菜残渣转化为氮掺杂碳纳米纤维气凝胶以增强多重能量存储
DOI：
10.1016/j.carbon.2018.05.011
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发表时间：
2018-10-01
期刊：
影响因子：
10.9
通讯作者：
Yang, Dongjiang
中科院分区：
文献类型：
--
作者：
Li, Daohao;Wang, Yu;Yang, Dongjiang
由一维碳纳米纤维（CNF）组装而成的三维碳气凝胶因其独特的连通和分级多孔结构在环境修复和能源储存方面具有广泛的应用前景而备受关注。在此，石花菜提取琼脂后的残留物（主要是内纤维，类似于1.6 mm）被用作前体，通过使用简易的超声波处理来制备纳米原纤化纤维素。纳米原纤化纤维素是高度工程化的纳米纤维，平均直径接近90 nm。然后将一维纤维素纳米纤维冷冻干燥后组装成三维纤维素气凝胶。随后在NH3中热解和活化可导致形成N掺杂的CNF气凝胶（N-PCNFA），其中纤维素大分子中的含氧基团转化为H2O、CO和CO2。N-PCNFA具有多级多孔结构、高比表面积（2290 m2·g-1）、N掺杂和三维连通通道，有利于电解质离子和电子的传输。N-PCNFA作为储能材料表现出高容量和长期稳定性。该研究为高效利用海洋生物质废弃物开发低成本、功能性的碳气凝胶提供了一种新的策略。(c)2018爱思唯尔有限公司版权所有
Three-dimensional (3D) carbonaceous aerogels assembled by one-dimensional (1D) carbon nanofibers (CNF) have attracted much attention, because their unique interconnected and hierarchical porous structure can offer a wide range of applications in environmental remediation and energy storage. Herein, the residue of gelidium amansii (mainly endofibers, similar to 1.6 mm) after extraction of agar were used as precursor to fabricate nanofibrilated cellulose by using facile ultrosonication treatment. The nanofibrilated celluloses are highly engineered nanofibers with average diameter of similar to 90 nm. Then the 1D cellulose nanofibers could be assembled into 3D nanofiber aerogels after freeze drying. The subsequent pyrolysis in NH3 and activition could result in the formation of N-doped CNF areogel (N-PCNFA), where the oxygen-containing groups in cellulose macromolecules converted to H2O, CO, and CO2. The N-PCNFA with hierarchically porous structure, high surface area (2290m(2) g(-1)), N-doping, and 3D interconnected channels are beneficial to electrolyte ions and electron transportation. The N-PCNFA displayed high capacity and long-term stability as energy storage material. This work highlights a new strategy in highly efficient utilizing the marine biomass waste for developing low-cost and functional carbon aerogel for multiple energy storage. (c) 2018 Elsevier Ltd. All rights reserved.