Facile synthesis of CoWO4/RGO composites as superior anode materials for lithium-ion batteries
- 52 Downloads
In this paper, a facile method has been developed to synthesize supported CoWO4 on the reduced graphene oxide (RGO) as high-performance anode material for Li-ion batteries. The composites with cuboid-like CoWO4 nanoparticles were prepared by directly adding graphene oxide into the precursor solution followed by a hydrothermal treatment. Different analytical methods like high-resolution TEM, XRD, TGA, and XPS characterizations were employed to illustrate structural information of the as-prepared CoWO4 and CoWO4/RGO composites. In addition, the Li-ion battery performance using the composites as anode materials was also discussed based on the detailed galvanostatic charge-discharge cycling tests. The result shows that the specific capacity of the as-prepared CoWO4/RGO composites can reach 533.3 mAh g−1 after 50 cycles at a current density of 100 mA g−1. During the whole cyclic process, the coulombic efficiency was maintained higher than 90%. Therefore, CoWO4, as an environment-friendly and cost-effective anode material, has promising potential for Li-ion batteries.
KeywordsCoWO4 nanocubes RGO Composite Li-ion battery Anode
The authors received financial support from the National Science Foundation (51573126).
- 24.Ren JG, Wang CD, Wu QH, Liu X, Yang Y, Fang L, Zhang WJ (2014) A silicon nanowire–reduced graphene oxide composite as a high-performance lithium ion battery anode material. Nano 6:3353–3360Google Scholar
- 31.Na HY, Zhang L, Qiu HX, Wu T, Chen MX, Yang N, Li LZ, Xing FB, Gao JP (2015) A two step method to synthesize palladiumecopper nanoparticles on reduced graphene oxide and their extremely high electrocatalytic activity for the electrooxidation of methanol and ethanol. J Power Sources 288:160–167CrossRefGoogle Scholar
- 39.Ye Y, Wu P, Zhang X, Zhou T, Tang YW, Zho YM, Lu TH (2014) Facile synthesis of graphene supported FeSn2 nanocrystals with enhanced li-storage capability. RSC Adv 4:17401C17404Google Scholar
- 43.Zhang GQ, Wu HB, Song T, Paik U, Wen X (2014) TiO2 hollow spheres composed of highly crystalline nanocrystals exhibit superior lithium storage properties. Angew Chem Int Ed 53(46):12590–12593Google Scholar