Preparation of porous carbon microspheres anode materials from fine needle coke powders for lithium-ion batteries
Preparation of porous carbon microspheres anode materials from fine needle coke powders for lithium-ion batteries
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DOI：
10.1039/c4ra15321a
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发表时间：
2015-01
期刊：
影响因子：
3.9
通讯作者：
W. Ren;Zailei Zhang;Yanhong Wang;Guangwei Kan;Qiangqiang Tan;Z. Zhong;F. Su
中科院分区：
文献类型：
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作者：
W. Ren;Zailei Zhang;Yanhong Wang;Guangwei Kan;Qiangqiang Tan;Z. Zhong;F. Su
工业生产碳基材料过程中产生大量的碳微粉(石墨和焦炭)作为固体废物。如何利用这些丰富的粉末生产出高价值的产品仍然是一个巨大的挑战。本文报道了以废未石墨化针状焦和石墨化针状焦为代表制备多孔炭微球(PCMs)，展示了其作为锂离子电池负极材料的应用。结果表明，石墨化后的相变材料的粒径为8~30μm，比表面积为50~120m2 g−1。在50 mA g−1电流密度下，其充电容量与商品石墨微球相当，但具有更高的倍率性能。
A large amount of fine carbon powders (graphite and cokes) are generated as the solid waste in the manufacture of carbon-based materials in industry. How to utilize these abundant powders to generate products with high value still remains a big challenge. Herein, we report the preparation of porous carbon microspheres (PCMs) employing waste non-graphitized needle coke and graphitized needle coke as the fine carbon powder representatives, demonstrating their use as anode materials for lithium-ion batteries. It was found that the graphitized PCMs had a size of 8–30 μm and surface areas between 50 and 120 m2 g−1. When used as the anode materials, their charge capacity at the current density of 50 mA g−1 was comparable to that of the commercial graphite microspheres, but they exhibited higher rate performance.