Lignin-derived interconnected hierarchical porous carbon monolith with large areal/volumetric capacitances for supercapacitor

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• 作者：Hui Li^a ; ¹ ; Du Yuan^a ; ¹ ; Chunhua Tang^a ; Suxi Wang^b ; Jiaotong Sun^a ; Zibiao Li^b ; Tao Tang^a ; Fuke Wang^b ; Hao Gong^a ; Chaobin He^a ; ^b ; ^{msehc@nus.edu.sg" class="auth_mail" title="E-mail the corresponding author}
• 刊名：Carbon
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：100
• 期：Complete
• 页码：151-157
• 全文大小：1821 K

文摘

A large scale 3D interconnected hierarchical porous carbon monolith was developed by a novel synthetic approach from the 2nd most abundant natural polymer, lignin. This newly derived carbon monolith possess desirable microstructure and high conductivity that enables the fabrication of a binder-/conductive additive-free thick electrode. The carbon monolith delivered simultaneously excellent areal/volumetric capacitances of 3.0 F cm⁻²/97.1 F cm⁻³, at a high mass loading of 14.4 mg cm⁻². The areal capacitances obtained in our work are the highest among the reported carbon-based electrodes. The carbon monolith based symmetric supercapacitor achieved a high areal energy density of 0.16 mWh cm⁻² at 1.75 mW cm⁻², with excellent cycling performance (∼95% retention after 10,000 cycles). Our work demonstrates the successful conversion of biomass waste into high-performance eletrode, and the promising areal/volumetric performances further suggest the developed approach may provide a positive route to improving the energy density of supercapacitor.