TY - JOUR
T1 - Sustainable production of lignin-derived porous carbons for high-voltage electrochemical capacitors
AU - Wen, Fuwang
AU - Zhang, Wenli
AU - Jian, Wenbin
AU - He, Xing
AU - Yin, Jian
AU - Shi, Jun
AU - Lin, Haibo
AU - Lu, Ke
AU - Qin, Yanlin
AU - Qiu, Xueqing
N1 - KAUST Repository Item: Exported on 2022-05-10
Acknowledgements: Financial support from the National Natural Science Foundation of China (No. 22108044), the National Key Research and Development Plan (No. 2018YFB1501503), the Research and Development Program in Key Fields of Guangdong Province (No. 2020B1111380002), the Natural Science Foundation for Distinguished Young Scholars of Guangdong Provence (No. 2019B151502038), and the financial support from the Guangdong Provincial Key Laboratory of Plant Resources Biorefinery (No. 2021GDKLPRB07).
PY - 2022/4/21
Y1 - 2022/4/21
N2 - The high energy storage cost is a crucial factor limiting the wide application of electrochemical capacitors. Herein, we proposed a comprehensive strategy to reduce the cost of electrochemical capacitors with aqueous electrolytes, i.e., reducing the cost of electrode materials and increasing the energy density of electrochemical capacitors. Low-cost lignin-derived porous carbon electrode materials with high specific surface area and hierarchical porous structure were prepared by CuCl2 activation. The CuCl2 activation agent was recycled and thus can be reused. What is more, we proposed that the mechanism of CuCl2 activation is a solid-phase reaction in which the chloride ions in copper chloride deprive the hydrogen atoms in lignin, resulting in the loss of hydrogen atoms and the formation of pores. High energy density C//C symmetric electrochemical capacitors, Zn//C and Pb//C asymmetric electrochemical capacitors based on lignin-derived porous carbon were fabricated using sulfate electrolytes which endow high working voltage window. This work provides a comprehensive strategy for designing electrochemical capacitors with high energy densities and low cost of energy storage, which is expected to promote the industrial application of electrochemical capacitors with aqueous electrolytes.
AB - The high energy storage cost is a crucial factor limiting the wide application of electrochemical capacitors. Herein, we proposed a comprehensive strategy to reduce the cost of electrochemical capacitors with aqueous electrolytes, i.e., reducing the cost of electrode materials and increasing the energy density of electrochemical capacitors. Low-cost lignin-derived porous carbon electrode materials with high specific surface area and hierarchical porous structure were prepared by CuCl2 activation. The CuCl2 activation agent was recycled and thus can be reused. What is more, we proposed that the mechanism of CuCl2 activation is a solid-phase reaction in which the chloride ions in copper chloride deprive the hydrogen atoms in lignin, resulting in the loss of hydrogen atoms and the formation of pores. High energy density C//C symmetric electrochemical capacitors, Zn//C and Pb//C asymmetric electrochemical capacitors based on lignin-derived porous carbon were fabricated using sulfate electrolytes which endow high working voltage window. This work provides a comprehensive strategy for designing electrochemical capacitors with high energy densities and low cost of energy storage, which is expected to promote the industrial application of electrochemical capacitors with aqueous electrolytes.
UR - http://hdl.handle.net/10754/676687
UR - https://linkinghub.elsevier.com/retrieve/pii/S0009250922002561
UR - http://www.scopus.com/inward/record.url?scp=85128784663&partnerID=8YFLogxK
U2 - 10.1016/j.ces.2022.117672
DO - 10.1016/j.ces.2022.117672
M3 - Article
SN - 0009-2509
VL - 255
SP - 117672
JO - Chemical Engineering Science
JF - Chemical Engineering Science
ER -