Affiliation:
1. Key Laboratory of Advanced Technologies of Materials (Ministry of Education) School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 China
2. Jinshi Technology Co. Ltd. 289 Longquanyi District Chengdu 610100 China
3. Research Institute of Frontier Science Southwest Jiaotong University Chengdu 610031 China
Abstract
AbstractConductive biomass carbon possesses unique properties of excellent conductivity and outstanding thermal stability, which can be widely used as conductive additive. However, building the high‐dense conductive biomass carbon with highly graphitized microcrystals at a lower carbonization temperature is still a major challenge because of structural disorder and low crystallinity of source material. Herein, a simple capillary evaporation method to efficiently build the high‐dense conductive ramie carbon (hd‐CRC) with the higher tap density of 0.47 cm3 g−1 than commercialized Super‐C45 (0.16 cm3 g−1) is reported. Such highly graphitized microcrystals of hd‐CRC can achieve the high electrical conductivity of 94.55 S cm−1 at the yield strength of 92.04 MPa , which is higher than commercialized Super‐C45 (83.92 S cm−1 at 92.04 MPa). As a demonstration, hd‐CRC based symmetrical supercapacitors possess a highly volumetric energy density of 9.01 Wh L−1 at 25.87 kW L−1, much more than those of commercialized Super‐C45 (5.06 Wh L−1 and 19.30 kW L−1). Remarkably, the flexible package supercapacitor remarkably presents a low leakage current of 10.27 mA and low equivalent series resistance of 3.93 mΩ. Evidently, this work is a meaningful step toward high‐dense conductive biomass carbon from traditional biomass graphite carbon, greatly promoting the highly‐volumetric–performance supercapacitors.
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
16 articles.
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