![Qingang Xiong](https://ckcew13.com/wp-content/uploads/2024/03/Qingang-Xiong-e1710161332749.jpg)
Qingang Xiong
Qingang Xiong is a tenured Full Professor at the State Key Laboratory of Pulp and Paper Engineering/School of Light Industry and Engineering, South China University of Technology. He is awardee of the National “Overseas High-level Talent Recruit Program” Youth Project in 2020 and “Future Chemical Scholars” of the Global Association of Chinese Chemical Engineers in 2021. He also won First Prize of the National Award for Progress in Business Science and Technology of China in 2022 (ranking 3/15) and Best Application Award for the First (2013) Supercomputing Application Award of the Chinese Academy of Sciences (ranking 5/14). Prof. Xiong’s research area are mainly simulation and experiment on multiphase flow and fluidization, thermochemical conversion of particles, flow and heat transfer of porous media, energy utilization and heat transfer enhancement. So far, Prof. Xiong has published more than 50 papers in authoritative journals as first/corresponding author, which has received more than 3000 independent citations from SCI journals; has led and completed one Frontier Project of the US Department of Defense (with funding of 500,000 US dollars). Currently, Prof. Xiong is in charge of a National “Overseas High-level Talent Recruit Program” Youth Project, a general project of the National Natural Science Foundation of China, two international (regional) cooperation and exchange projects of the National Natural Science Foundation of China, and a general project of the Guangdong Provincial Natural Science Foundation of China. Prof. Xiong has served as panelist and reviewer of programs and awards for the United States National Science Foundation, the United States Department of Energy, the American Chemical Society, the China Society of Particuology, etc. Prof. Xiong has delivered 9 keynote/invited presentations at renowned international/domestic conferences; edited 14 special issues on biomass thermochemical conversion, fluidization, etc., in renowned journals such as ACS Sustainable Chemistry & Engineering. At present, Prof. Xiong is youth board member of the China Society of Particuology, head of CFD youth group of the professional committee “Process Modeling and Simulation” of the China Society of Chemical Engineering, and youth editorial board member of the SCI journal Biochar.
Presentation title: Synthesizing High-Performance Porous Hard Carbon Anodes for Potassium-Ion Batteries Directly from Black Liquor and Deinking Sludge
Abstract: Porous hard carbon anodes, with large interlayer space and high adsorption ability, can offer much better cycle stability and higher discharge capacity for potassium-ion batteries compared to commercial graphite anodes. However, most commercial hard carbon is synthesized from relatively expensive high-molecular polymer. In this study, papermaking wastes were utilized as precursors for producing hard carbons and pore-enlarging agent, respectively. Specifically, after thorough mixing through ball milling, black liquor solids and pore-enlarging agent were utilized to produce the porous hard carbon anode via the co-pyrolysis method. The pore-enlarging agent consists of chlorides derived from deinking sludge. The results show that direct pyrolysis of black liquor can produce hard carbons efficiently, eliminating the need to extract lignin from black liquor. Moreover, it is shown that pore-enlarging agent derived from deinking sludge is able to enlarge much portion of pores on hard carbons, resulting in abundant mesopores. Electrochemical tests demonstrate that the synthesized porous hard carbon anodes can achieve highest specific capacity of 303.5 mAh g-1 at 100 mA g-1 using a 1.0 M potassium hexafluorophosphate electrolyte in a mixture of diethyl carbonate and ethylene carbonate. Additionally, the synthesized porous hard carbon anodes exhibit low average capacity decay per cycle of 0.06% at 100 mA g-1 when tested with a 1.0 M potassium bis(fluorosulfonyl)imide electrolyte in the same solvent mixture after 500 cycles. Therefore, recycling black liquor and deinking sludge to produce porous hard carbon anodes for potassium-ion batteries is a promising approach for environmental and energy sustainability.