Wei Yanbin, Cheng Wenhua, Huang Yudai, Liu Zhenjie, Sheng Rui, Wang Xingchao, Jia Dianzeng, Tang Xincun
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang 830017, People's Republic of China.
School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, People's Republic of China.
Langmuir. 2022 Sep 27;38(38):11610-11620. doi: 10.1021/acs.langmuir.2c01336. Epub 2022 Sep 14.
Biomass as a carbon material source is the characteristic of green chemistry. Herein, a series of hierarchical P-doped cotton stalk carbon materials (HPCSCMs) were prepared from cheap and abundant biowaste cotton stalk. These materials possess a surface area of 3463.14 m g and hierarchical pores. As lithium-ion battery (LIB) anodes, the samples exhibit 1100 mAh g at 0.1 A g after 100 cycles and hold 419 mAh g at 1 A g after 1000 cycles, with nearly 100% capacity retention. After HPCSCMs are loaded with sulfur (S/HPCSCMs), the samples (S/HPCSCMs-2) deliver a discharge capacity of 413 mAh g at 0.1 A g after 100 cycles as lithium-sulfur (Li-S) battery cathodes. This excellent electrochemical performance can be attributed to P in carbon networks, which not only provides more active sites, but also improves electrical conductivity.
生物质作为碳材料来源是绿色化学的特点。在此，一系列分级磷掺杂棉秆碳材料（HPCSCMs）由廉价且丰富的生物废料棉秆制备而成。这些材料具有3463.14 m²/g的表面积和分级孔隙。作为锂离子电池（LIB）阳极，样品在0.1 A/g下循环100次后表现出1100 mAh/g的容量，在1 A/g下循环1000次后保持419 mAh/g的容量，容量保持率近100%。在HPCSCMs负载硫（S/HPCSCMs）后，作为锂硫（Li-S）电池阴极，样品（S/HPCSCMs-2）在0.1 A/g下循环100次后放电容量为413 mAh/g。这种优异的电化学性能可归因于碳网络中的磷，它不仅提供了更多的活性位点，还提高了电导率。
