Preparation of hierarchical porous carbon from waste printed circuit boards for high performance electric double-layer capacitors

JOURNAL OF POWER SOURCES

卷:323

Article

Du, Xuan¹  Wang, Li^1,2  Zhao, Wei¹  Wang, Yi¹  Qi, Tao¹  Li, Chang Ming^1,3 

[1] Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China

[2] Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Peoples R China

[3] Southwest Univ, Inst Clean Energy & Adv Mat, Fac Mat Energy, Chongqing 400715, Peoples R China

关键词: Hierarchical porous carbon;    Electric double-layer capacitor;    Printed circuit board;    Non-metallic fractions;    Energy storage;   

DOI  :  10.1016/j.jpowsour.2016.05.054

来源: Elsevier

【 摘 要 】

Renewable clean energy and resources recycling have become inevitable choices to solve worldwide energy shortages and environmental pollution problems. It is a great challenge to recycle tons of waste printed circuit boards (PCB) produced every year for clean environment while creating values. In this work, low cost, high quality activated carbons (ACs) were synthesized from non-metallic fractions (NMF) of waste PCB to offer a great potential for applications of electrochemical double-layer capacitors (EDLCs). After recovering metal from waste PCB, hierarchical porous carbons were produced from NMF by carbonization and activation processes. The experimental results exhibit that some pores were formed after carbonization due to the escape of impurity atoms introduced by additives in NMF. Then the pore structure was further tailored by adjusting the activation parameters. Roles of micropores and nonmicropores in charge storage were investigated when the hierarchical porous carbons were applied as electrode of EDLCs. The highest specific capacitance of 210 F g(-1) (at 50 mA g(-1)) and excellent rate capability were achieved when the ACs possessing a proper micropores/non-micropores ratio. This work not only provides a promising method to recycle PCB, but also investigates the structure tailoring arts for a rational hierarchical porous structure in energy storage/conversion. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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