Bean-dreg-derived carbon materials used as superior anode material for lithium-ion batteries. (20th December 2016)

• Record Type: Journal Article
• Authors: Ru, Haohui; Xiang, Kaixiong; Zhou, Wei; Zhu, Yirong; Zhao, Xiu Song; Chen, Han
• Is Part Of: Electrochimica acta. Volume 222(2016)
• Page Start: 551
• Page End: 560
• Publication Date: 2016-12-20
• Subjects: Lithium-ion batteries -- graphitization -- activation -- bean dreg; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.10.202
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Highlights: The structures of modified carbons from bean dregs were regulated via graphitization treatment and chemical activation. The sample thermally treated at 2800 °C showed more ordered graphitic domains and superior reversibility, excellent cycling stability and rate capability. The KOH-activated sample demonstrated enhanced electrochemical performance due to its high surface area and abundant mesoporous structure. Abstract: The structures of modified carbons from bean dregs were regulated via graphitization treatment and chemical activation. The microstructure and electrochemical performance were studied using X-ray diffraction, Raman spectrometer, SEM and TEM techniques. The electrochemical performance was investigated using electrochemical methods. After heat-treatment at 2800 °C, the obtained BDC-2800 possessed a high degree of graphitization and showed an outstanding cycling performance, delivering capacity decay from 423 to 396 mAh g −1 at 0.1 C after 100 cycles. The chemical-treated carbons also demonstrated enhanced electrochemical performance, especially for the KOH-treated sample. The BDC-K displayed superior specific charge capacity of 801 mAh g −1 at 0.1 C, and showed an impressive rate capability of 643 mAh g −1 at 1 C. In addition, this sample delivered capacity retention of 94% after 500 cycles at 1 C. This good electrochemical performance was mainly due to its high surface area and abundant mesoporous structure.