Inducing Buffer Vacancies : The Roles of Al2o3 in Achieving a Highly Reversible Conversion Reaction and a Long Life Sno2/Graphene Nanosheets Anode
We had introduced a facile strategy to improve the electrochemical performance of graphene nanosheets and SnO 2 hybrid (SnO 2 /GNSs) as anode for lithium-ion batteries through adding and removing of Al 2 O 3 from the composite. The morphology and structure of as-prepared SnO 2 /GNSs composites were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectra. Benefiting from the vacancy formed during the soaking in sodium hydroxide solution, the volume expansion of SnO 2 is remitted. Meanwhile, the agglomeration of SnO 2 was effectively alleviated. Therefore, a much better cyclic performance was achieved as compared to pristine composite. The modified composite (M-SnO 2 /GNSs) exhibited reversible capacities of 611 mAhg -1 for the first charge and 436 mAhg -1 after 50 cycles at 50 mAg -1 , respectively. Further, the composite showed good rate
Year of publication: |
[2022]
|
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Authors: | Zhang, Xiaoting ; Zhang, Ronghua ; Diao, Jiaxiu ; Wu, Guoxing ; Wang, Rui |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
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