材料科学
法拉第效率
阳极
化学工程
电化学
石墨
锂(药物)
碳纤维
炭黑
热解炭
热解
锂离子电池
电池(电)
纳米技术
电极
复合材料
复合数
医学
功率(物理)
化学
天然橡胶
物理
量子力学
内分泌学
工程类
物理化学
作者
Shu‐Chi Wu,Ching‐Wei Lin,Pai‐Chun Chang,Tzu‐Yi Yang,Shin‐Yi Tang,Ding-Chou Wu,Cheng-Ru Liao,Yi‐Chung Wang,Ling Lee,Yi‐Jen Yu,Yu‐Lun Chueh
标识
DOI:10.1021/acsami.2c20393
摘要
Here, the successful transformation of graphitic carbon with a high degree of graphitization and a nanoflake structure from pyrolytic tire carbon black was demonstrated. First, amorphous carbon black with a porous structure was obtained after pyrolysis and simple preacid treatments. Subsequently, the carbon black was converted into a highly graphitic structure at a relatively low temperature (850 °C) through a facile electrochemical route using molten salt, which is ecofriendly and has high potential for large-scale graphitization compared to conventional incineration techniques. Moreover, we further improved the crystallinity and uniformity of the product simultaneously by directly mixing the metal oxide catalyst Fe2O3 with a carbon precursor. The mechanism of this metal-catalyzed electrochemical graphitization has been discussed in detail. To confirm their potential in practical applications, the as-prepared graphitized nanoflakes were used as conductive additives for silicon anodes in lithium-ion batteries, which showed a performance comparable to those utilizing commercial Super-P additives, exhibiting an initial Coulombic efficiency of approximately 79.7% and a high capacity retention of approximately 45.8% after 100 cycles with a reversible capacity of 1220 mAh g–1 at a current rate of 400 mA g–1. Hence, successfully recovered waste-tire-derived carbon black utilizing a low-temperature Fe2O3-catalyzed electrochemical process opens a pathway in low-temperature graphitization toward a sustainable value-added application in the field of energy storage.
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