Optimized synthesis of nitrogen-doped carbon with extremely high surface area for adsorption and supercapacitor
Optimized synthesis of nitrogen-doped carbon with extremely high surface area for adsorption and supercapacitor
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用于吸附和超级电容器的具有极高表面积的氮掺杂碳的优化合成
DOI：
10.1016/j.apsusc.2020.147961
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发表时间：
2021-02
影响因子：
6.7
通讯作者：
Liqing Li
中科院分区：
文献类型：
--
作者：
Baogen Liu;Rui Shi;Ruofei Chen;Chunhao Wang;Ke Zhou;Yadong Ren;Zheng Zeng;Yiyang Liu;Liqing Li
碳基材料因其发达的孔隙结构和功能化表面而对于许多科学应用至关重要。然而，为了实现高表面积，通常需要苛刻的合成条件，例如使用高温和腐蚀性活化剂，这使得官能团逐渐分解或反过来反应，导致表面化学性能非常差。在此，提出了一种新颖有效的方法，包括优化的碳化和活化过程。熔融锌盐不仅可以通过强路易斯酸碱相互作用显着增强氮源的稳定性，而且可以强化成孔过程。通过改变活化温度，所制备的废弃生物质衍生的多孔碳表现出极高的表面积（高达 4098 m2g−1）和丰富的氮含量（从 0.67 到 6.18 wt%）。有趣的是，除了无序的交联网络微形貌之外，碳表面还装饰着许多独特的微球和立方结构。就潜在应用而言，这些多孔碳同时表现出创纪录的高丙酮静态吸收量（25°C和18kPa时为1678 mg g−1）和超高电容器特性（比电容为346 F/g−1，比能量密度为39.4 Wh/kg−1）。
Carbon based materials are vital for many scientific applications because of their well-developed pore structure and functionalized surface. However, to achieve high surface area, harsh synthesis conditions, such as the use of high temperatures and corrosive activators, are usually needed, which allows the functional groups to gradually decompose or react in return, resulting in very poor surface chemistry. Herein, a novel and effective approach including the optimized carbonization and activation processes is proposed. The molten zinc salt can not only significantly enhance the stability of the nitrogen source through the strong Lewis acid-base interactions, but also strengthen the pore-forming process. By varying the activating temperature, the as-prepared waste biomass derived porous carbons exhibit an extremely high surface area (up to 4098 m2g−1) and rich nitrogen contents (from 0.67 to 6.18 wt%). Interestingly, beyond the disordered cross-linked network microtopography, there are numerous unique microsphere and cubic structures decorated on the carbon surface. In terms their potential applications, these porous carbons simultaneously show a record-high acetone static uptake (1678 mg g−1at 25 °C and 18 kPa) and ultrahigh capacitor property (specific capacitance of 346 F/g−1and specific energy density of 39.4 Wh/kg−1).
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影响因子：
9.2
作者：
Yiliang Wang;Huaqing Xuan;Gaoxin Lin;Fan Wang;Zhi Chen;Xiaoping Dong
通讯作者：
Yiliang Wang;Huaqing Xuan;Gaoxin Lin;Fan Wang;Zhi Chen;Xiaoping Dong
影响因子：
11.9
作者：
Wang, Jiacheng;Senkovska, Irena;Kaskel, Stefan
通讯作者：
Kaskel, Stefan
影响因子：
9.2
作者：
Harmas, M.;Thomberg, T.;Lust, E.
通讯作者：
Lust, E.
影响因子：
15
作者：
To, John W. F.;He, Jiajun;Bao, Zhenan
通讯作者：
Bao, Zhenan
影响因子：
9.8
作者：
Cui, Xueliang;Long, Yu;Dong, Zhengping
通讯作者：
Dong, Zhengping