Zhu Junsheng, Zhang Zhaoqi, Ding Xiaobo, Cao Jing-Pei, Hu Guangzhou
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China.
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China.
J Colloid Interface Sci. 2021 Apr;587:367-375. doi: 10.1016/j.jcis.2020.12.030. Epub 2020 Dec 17.
To expand the variety of Sn/C composites, lignite-based porous carbon was initially prepared with Baoqing lignite as the raw material and KCO as the extractant and activator. A novel Sn/lignite-based porous carbon composite was subsequently fabricated via an in situ one-pot synthesis method. In the nanocomposite, Sn nanoparticles are uniformly distributed on lignite-based porous carbon, improving the lithium-ion storage performance of the as-prepared material. Compared with pure Sn and bare lignite-based porous carbon, Sn/lignite-based porous carbon displayed a superior electrochemical performance. The composite material exhibits a high reversible capacity of 941 mAh g after 200 cycles at 100 mA g. Even after 800 charge/discharge cycles at a high current density of 1000 mA g, the nanocomposite retains a reversible capacity of 573 mAh g. The enhanced lithium-ion storage performance can be attributed to the combined effect of Sn and lignite-based porous carbon.
为了拓展锡/碳复合材料的种类，最初以宝清褐煤为原料、碳酸钾为萃取剂和活化剂制备了褐煤基多孔碳。随后通过原位一锅合成法制备了一种新型的锡/褐煤基多孔碳复合材料。在该纳米复合材料中，锡纳米颗粒均匀分布在褐煤基多孔碳上，提高了所制备材料的锂离子存储性能。与纯锡和裸褐煤基多孔碳相比，锡/褐煤基多孔碳表现出优异的电化学性能。该复合材料在100 mA g下循环200次后具有941 mAh g的高可逆容量。即使在1000 mA g的高电流密度下进行800次充放电循环后，该纳米复合材料仍保持573 mAh g的可逆容量。锂离子存储性能的增强可归因于锡和褐煤基多孔碳的协同作用。
