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Polyurethane foam is a typical commercial polymer with a large production quantity and its waste needs to be recycled. This work reports a facile method to prepare ultra-microporous carbon from the polyurethane foam (PUF) waste and use it as a reservoir to impregnate sulfur for Li-S batteries. The raw PUF was carbonized and then activated with KOH. By controlling the activation temperatures, four carbon materials (PUFC-T) with different textures and N-doping levels were obtained. PUFC-800 shows the highest BET surface area, microporous volume, and quaternary N and pyridine N-oxide species. The electrochemical test results showed that higher microporous volume is beneficial to increase the uniform distribution of sulfur, as a result, the cycle stability and rate capacity is improved significantly. A large reversible capacity of 542 mAh g-1 can be retained at a large current of 0.5 C after 200 cycles with high sulfur loading of 70%.
Xianxian Zhou; Min Li; Chao Ge; Shibin Liu. Electrochemical behaviors of graphene decorated sulfurized polyurethane foam-based ultra-microporous carbon. E3S Web of Conferences 2020, 213, 02008 .
AMA StyleXianxian Zhou, Min Li, Chao Ge, Shibin Liu. Electrochemical behaviors of graphene decorated sulfurized polyurethane foam-based ultra-microporous carbon. E3S Web of Conferences. 2020; 213 ():02008.
Chicago/Turabian StyleXianxian Zhou; Min Li; Chao Ge; Shibin Liu. 2020. "Electrochemical behaviors of graphene decorated sulfurized polyurethane foam-based ultra-microporous carbon." E3S Web of Conferences 213, no. : 02008.
Low-cost activated carbons were prepared from waste polyurethane foam by physical activation with CO2 for the first time and chemical activation with Ca(OH)2, NaOH, or KOH. The activation conditions were optimized to produce microporous carbons with high CO2 adsorption capacity and CO2/N2 selectivity. The sample prepared by physical activation showed CO2/N2 selectivity of up to 24, much higher than that of chemical activation. This is mainly due to the narrower microporosity and the rich N content produced during the physical activation process. However, physical activation samples showed inferior textural properties compared to chemical activation samples and led to a lower CO2 uptake of 3.37 mmol·g−1 at 273 K. Porous carbons obtained by chemical activation showed a high CO2 uptake of 5.85 mmol·g−1 at 273 K, comparable to the optimum activated carbon materials prepared from other wastes. This is mainly attributed to large volumes of ultra-micropores (
Chao Ge; Dandan Lian; Shaopeng Cui; Jie Gao; Jianjun Lu. Highly Selective CO2 Capture on Waste Polyurethane Foam-Based Activated Carbon. Processes 2019, 7, 592 .
AMA StyleChao Ge, Dandan Lian, Shaopeng Cui, Jie Gao, Jianjun Lu. Highly Selective CO2 Capture on Waste Polyurethane Foam-Based Activated Carbon. Processes. 2019; 7 (9):592.
Chicago/Turabian StyleChao Ge; Dandan Lian; Shaopeng Cui; Jie Gao; Jianjun Lu. 2019. "Highly Selective CO2 Capture on Waste Polyurethane Foam-Based Activated Carbon." Processes 7, no. 9: 592.