Zhang Fuming, Xiao Xiangshang, Gandla Dayakar, Liu Zhaoxi, Tan Daniel Q, Ein-Eli Yair
Department of Materials Science and Engineering, Guangdong Technion-Israel Institute of Technology, 241 Daxue Road, Jinping District, Shantou 515063, China.
Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
Nanomaterials (Basel). 2021 Dec 23;12(1):27. doi: 10.3390/nano12010027.
We report here on a hollow-fiber hierarchical porous carbon exhibiting an ultra-high specific surface area, synthesized by a facile method of carbonization and activation, using the Metaplexis Japonica (MJ) shell. The Metaplexis Japonica-based activated carbon demonstrated a very high specific surface area of 3635 m g. Correspondingly, the derived carbonaceous material delivers an ultra-high capacitance and superb cycle life in an alkaline electrolyte. The pore-ion size compatibility is optimized using tailored hierarchical porous carbon and different ion sized organic electrolytes. In ionic liquids nonaqueous based electrolytes we tailored the MJ carbon pore structure to the electrolyte ion size. The corresponding supercapacitor shows a superior rate performance and low impedance, and the device records specific energy and specific power densities as high as 76 Wh kg and 6521 W kg, as well as a pronounced cycling durability in the ionic liquid electrolytes. Overall, we suggest a protocol for promising carbonaceous electrode materials enabling superior supercapacitors performance.
我们在此报告一种具有超高比表面积的中空纤维分级多孔碳，它是通过一种简便的碳化和活化方法合成的，使用了萝摩（MJ）壳。基于萝摩的活性炭表现出非常高的比表面积，为3635 m²/g。相应地，衍生的碳质材料在碱性电解质中具有超高电容和出色的循环寿命。使用定制的分级多孔碳和不同离子大小的有机电解质优化了孔离子尺寸兼容性。在基于离子液体的非水电解质中，我们将萝摩碳的孔结构调整为与电解质离子尺寸相匹配。相应的超级电容器表现出优异的倍率性能和低阻抗，该器件的比能量和比功率密度分别高达76 Wh/kg和6521 W/kg，并且在离子液体电解质中具有显著的循环耐久性。总体而言，我们提出了一种有望实现优异超级电容器性能的碳质电极材料方案。
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