Uniform core-shell Cu6Sn5@C nanospheres with controllable synthesis and excellent lithium storage performances | |
Su, LW (Su, Liwei); Fu, JH (Fu, Jianghao); Zhang, PJ (Zhang, Pinjie); Wang, LB (Wang, Lianbang); Wang, YH (Wang, Yuanhao); Ren, MM (Ren, Manman) | |
刊名 | RSC ADVANCES |
2017 | |
卷号 | 7期号:45页码:28399-28406 |
DOI | 10.1039/c7ra02214j |
英文摘要 | Metallic tin (Sn) is one of the most promising alternatives to graphite anodes for lithium ion batteries due to its higher theoretical capacity, higher packing density and safer thermodynamic potential, while the huge volume transformation during repeated cycling leads to rapid pulverization and consequently poor capacity retention. This work provides an easy-to-control method to prepare uniform core-shell Cu6Sn5@C nanospheres in which Cu@Sn cores (40-50 nm in diameter) are well encapsulated by PANI-derived carbon layers with a thickness of similar to 5 nm. The obtained Cu6Sn5@C exhibits an excellent cycling ability and good rate capabilities. Both the reversible capacity (518 mA h g(-1)) after 100 cycles and the initial coulombic efficiency (89.2%) are the highest values in Cu6Sn5-based materials. The impressive cycling performance is believed to result from the carbon coating that not only prevents particle agglomeration during the synthesis but also accommodates the vast structural transformation of the Cu6Sn5 nanocores during the electrochemical (de)lithiation process, so ensuring good ionic and electronic transport to the core. The effect of synthesis conditions on the composition are also investigated systematically. |
WOS记录号 | WOS:000402999300053 |
内容类型 | 期刊论文 |
源URL | [http://ir.xjipc.cas.cn/handle/365002/5096] |
专题 | 新疆理化技术研究所_材料物理与化学研究室 |
作者单位 | 1.Zhejiang Univ Technol, Coll Chem Engn, State Key Lab Breeding Base Green Chem Synth Tech, Hangzhou 310014, Zhejiang, Peoples R China 2.Juhua Grp Technol Ctr, Quzhou 324004, Peoples R China 3.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China 4.Qilu Univ Technol, Inst Mat Sci & Engn, Jinan 250353, Peoples R China |
推荐引用方式 GB/T 7714 | Su, LW ,Fu, JH ,Zhang, PJ ,et al. Uniform core-shell Cu6Sn5@C nanospheres with controllable synthesis and excellent lithium storage performances[J]. RSC ADVANCES,2017,7(45):28399-28406. |
APA | Su, LW ,Fu, JH ,Zhang, PJ ,Wang, LB ,Wang, YH ,&Ren, MM .(2017).Uniform core-shell Cu6Sn5@C nanospheres with controllable synthesis and excellent lithium storage performances.RSC ADVANCES,7(45),28399-28406. |
MLA | Su, LW ,et al."Uniform core-shell Cu6Sn5@C nanospheres with controllable synthesis and excellent lithium storage performances".RSC ADVANCES 7.45(2017):28399-28406. |
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