Facile synthesis of spherical carbon composite particles via a dry granulation process
Facile synthesis of spherical carbon composite particles via a dry granulation process
复制标题
DOI：
10.1016/j.carbon.2015.07.014
复制
发表时间：
2015-11
期刊：
影响因子：
10.9
通讯作者：
S. Okazaki;Kenta Hamai;A. F. Arif;T. Ogi;K. Okuyama
中科院分区：
文献类型：
--
作者：
S. Okazaki;Kenta Hamai;A. F. Arif;T. Ogi;K. Okuyama
以油基原料焦为原料，采用干法造粒工艺合成球形碳复合颗粒。采用纳米TiO2、SiO2、Si等金属和金属氧化物纳米颗粒作为碳复合材料的添加剂。根据NPs的添加类型和合成条件的不同，形成了具有微孔结构的核壳复合材料和内混复合材料。在含硅组分的复合材料中，sio2在热处理过程中被原焦炭中的碳和挥发性组分还原为siox2。研究了碳复合材料作为锂离子电池负极材料的电化学性能。有趣的是，由原料焦炭和硅制备的碳复合材料作为负极的性能优于纯石墨。
We synthesized spherical carbon composite particles from oil-based raw coke using a dry granulation process. Metal and metal oxide nanoparticles (NPs) such as TiO2, SiO2, and Si were used as additives in the carbon composites. Core–shell and internally mixed composites with microporous structures were formed depending on the type of NPs added and synthesis conditions. In the composites containing silicon species, SiO2was reduced to SiOxby carbon and volatile constituents in the raw coke during heat treatment. The electrochemical performance of the carbon composites as negative electrodes in lithium-ion batteries was investigated. Interestingly, the carbon composites prepared from raw coke and Si showed better performance as negative electrodes than pure graphite.