期刊
ACS APPLIED ENERGY MATERIALS
卷 1, 期 9, 页码 4708-4715出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.8b00826
关键词
graphene oxide; Ga2O3 nanosheets; nanocomposites; Li-ion batteries; Na-ion batteries
资金
- NSFC [51572153, 51602177]
- Major Basic Program of the Natural Science Foundation of Shandong Province [ZR2017ZB0317]
Herein, we propose a practical way for direct preparation of gallium oxide nanosheets/reduced graphene oxide (Ga2O3 NSs/rGO) nanocomposites via oxygenic groups contained hydrophilic graphene oxide (GO) template with subsequent annealing treatment. Benefiting from the two-dimensional (2D) nanoarchitecture of Ga2O3 NSs and rGO, Ga2O3 NSs/rGO nanocomposites exhibit enhanced kinetics and improved cycling stability in Li-ion and Na-ion batteries (LIBs/SIBs). The pseudocapacitance performance is authenticated through kinetic analysis. Ex situ XRD and XPS measurements prove that the reversible Li-ion storage in Ga2O3 NSs/rGO electrodes is a conversion reaction and alloying mechanism. In addition, the full cells fabricated by coupling Ga2O3 NSs/rGO anode and LiFePO4/C or Na3V2(PO4)(3)/C cathodes exhibit outstanding electrochemical performances. In general, such a new approach, which is not specific to Ga2O3 NSs/rGO nanocomposites, offers great opportunities for 2D oxide nanomaterials or nanocomposites as high-performance electrodes.
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