期刊
JOURNAL OF MATERIALS SCIENCE
卷 56, 期 12, 页码 7573-7586出版社
SPRINGER
DOI: 10.1007/s10853-020-05747-4
关键词
-
资金
- New Style Think Tank of Shaanxi Universities (Research Center for Auxiliary Chemistry and New Materials Development, Shaanxi University of Science and Technology) [ACNM-202005]
- Research Starting Foundation of Shaanxi University of Science and Technology [2018BJ-21, 2016TPJS-07]
Transition metal oxides have shown potential for lithium storage, but face challenges due to poor conductivity. This study synthesized ultra-thin WO3 nanorods with oxygen vacancies and reduced graphene oxide, enhancing conductivity and electrochemical performance. The nanocomposite displayed high capacity and cycling stability, making it a promising candidate for Li-ion battery anodes.
Transition metal oxides have shown an extraordinary potential for lithium-storage capability to date. However, it remains enormous challenge to gain high capacities, good rate performance and cyclability due to their inferior conductivity. To address this issue, oxygen vacancies (V(O)s) implanted ultrathin WO3 nanorods (the diameter around 5 nm and the length less than 100 nm) composed with reduced graphene oxide (namely WO3-x/rGO), were synthesized by proposing a logical design. For the sake of better showing the outcome of such configuration, holy nanosheets of pure WO3 anode were proposed to compare with nanorods WO3-x/rGO one in terms of electrochemical properties, and they were obtained via annealing H2WO4/rGO precursor in air and argon atmosphere with the same annealing ramp, respectively. By contrast, both electron paramagnetic resonance and X-ray photoelectron spectroscopic characterizations demonstrate the existence of V(O)s in WO3-x/rGO composite. The generation of V(O)s together with the reserve of rGO, the conductivity of WO3-x/rGO anode is distinctly enhanced, which is then verified by the compared electrochemical performance in this work. It is clearly shown that the WO3-x/rGO nanocomposite displays a capacity of 745 mAh g(-1) at a current density of 0.1 A g(-1) after 200 cycles and excellent cycling stability up to 1000 cycles with capacity of 428 mAh g(-1) at 1 A g(-1). These findings exhibit that nanorods WO3-x/rGO nanocomposite is a promising candidate for high-performance Li-ion battery anode.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据