Template-Free Synthesis of Honeycomblike Porous Carbon Rich in Specific 2–5 nm Mesopores from a Pitch-Based Polymer for a High-Performance Supercapacitor
- Taotao GuanTaotao GuanInstitute of Coal Chemistry, Chinese Academy of Sciences, 27 Taoyuan South Road, Taiyuan 030001, P. R. ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, P. R. ChinaMore by Taotao Guan
- Jianghong Zhao*Jianghong Zhao*E-mail: [email protected] (J.Z.).Engineering Research Center of Ministry of Education for Fine Chemicals, Shanxi University, Taiyuan 030006, P. R. ChinaMore by Jianghong Zhao
- Guoli ZhangGuoli ZhangInstitute of Coal Chemistry, Chinese Academy of Sciences, 27 Taoyuan South Road, Taiyuan 030001, P. R. ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, P. R. ChinaMore by Guoli Zhang
- Jianlong WangJianlong WangInstitute of Coal Chemistry, Chinese Academy of Sciences, 27 Taoyuan South Road, Taiyuan 030001, P. R. ChinaMore by Jianlong Wang
- Dongdong ZhangDongdong ZhangInstitute of Coal Chemistry, Chinese Academy of Sciences, 27 Taoyuan South Road, Taiyuan 030001, P. R. ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, P. R. ChinaMore by Dongdong Zhang
- Kaixi Li*Kaixi Li*E-mail: [email protected] (K.L.).Institute of Coal Chemistry, Chinese Academy of Sciences, 27 Taoyuan South Road, Taiyuan 030001, P. R. ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, P. R. ChinaMore by Kaixi Li
Abstract
A template-free strategy has always been attractive to design and fabricate advanced carbon materials with tunable nanostructures from cheap precursors. Herein, honeycomblike mesoporous carbons (HPCs) are prepared from pitch-based polymers through a self-assembly foaming strategy without using any templates. Rich mesopores specific in sizes of 2–5 nm and abundant open-ended honeycomblike holes endow a hierarchical pore-in-pore feature of HPCs and an ultrahigh specific surface area (3473 m2 g–1). With their superior structure, HPCs can deliver a high supercapacity of 339 F g–1 at a current density of 1 A g–1 in 6 M KOH aqueous electrolyte and retain 85.6% of the capacity even at a current density of 50 A g–1. Meanwhile, a supercapacitive cell assembled by two HPC electrodes yields a conspicuously ultrahigh energy density of 34.5 Wh kg–1 (12.8 Wh L–1) at a high power density of 679.4 W kg–1 (251.4 W L–1). This work provides a new method for the controllable synthesis of advanced carbon materials from pitch and presents further applications in flexible electrochemical supercapacitors.
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