Characterization of Hierarchical Porous Carbons Made from Bean Curd via K2CO3 Activation as a Supercapacitor Electrode
Characterization of Hierarchical Porous Carbons Made from Bean Curd via K2CO3 Activation as a Supercapacitor Electrode
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通过 K2CO3 活化豆腐制成的多级孔碳作为超级电容器电极的表征
DOI：
10.1002/celc.201900962
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发表时间：
2019
期刊：
影响因子：
4
通讯作者：
Zhuo Shuping
中科院分区：
文献类型：
--
作者：
Mu Jiahui;Li Qiang;Kong Xiangjin;Wu Xiaozhong;Sunarso Jaka;Zhao Yi;Zhou Jin;Zhuo Shuping
可持续能源开发的进展通常依赖于使用绿色材料和试剂来制造高性能储能设备的组件的想法。本文中，我们表明，在由两个相同的来自豆腐的分级多孔碳（HPC）电极和10 wt.%的来自豆腐的分级多孔碳（HPC）电极制成的对称超级电容器（SC）中，可以在1 M H2SO 4溶液中在0.1 A g-1电流密度下实现11.9Wh kg-1的相对高的能量密度和高达10000次循环的稳定电容性能。 碳酸钾（K2 CO 3）;两者都是无毒的可食用材料。这种HPC（定义为HPC-10）是通过一锅活化工艺随后在750 ℃下碳化制得的，其表现出2514 m2 g-1的高比表面积、分级多孔骨架（即， 同时存在丰富的微孔、中孔和大孔），并含有N和O掺杂剂组分。在三电极系统中，HPC-10在1 M H2SO 4中的比电容为486 F g− 1，在6 M KOH中的比电容为404 F g− 1，两者均在0.1 A g− 1电流密度下获得。 本文还系统地评价了HPC的孔结构和电化学性能随K_2CO_3浓度从0 wt.% 至15重量%。
Progress in sustainable energy development often relies upon the idea of making use of green materials and agents to fabricate the components of high‐performance energy storage devices. Herein, we show that a relatively high energy density of 11.9 Wh kg−1at a 0.1 A g−1current density in a 1 M H2SO4solution and a stable capacitance performance for up to 10000 cycles can be achieved in a symmetric supercapacitor (SC) made of two identical hierarchical porous carbon (HPC) electrodes derived from bean curd and 10 wt.% potassium carbonate (K2CO3); both of which are non‐toxic, edible materials. Such HPC, defined as HPC‐10, which was made through a one‐pot activation process followed by carbonization at 750 °C, exhibits high specific surface area of 2514 m2g−1, hierarchical porous framework (i. e., simultaneous presence of abundant micropores, mesopores, and macropores), and contains N and O dopant components. In a three‐electrode system, HPC‐10 showed specific capacitances of 486 F g−1in a 1 M H2SO4and 404 F g−1in a 6 M KOH, both obtained at a 0.1 A g−1current density. This work also evaluates systematically the porous structure and electrochemical performance of HPC as a function of K2CO3concentration from 0 wt.% to 15 wt.%.