High Lithium Storage Performance Based On Nanocomposite Arrays

In recent years, with the rapid development of smart phones, tablet computers, digital cameras and other electronic equipments, the demand for high capacity and cyclability of lithium-ion batteries (LIBs) is becoming larger and larger. In this paper, based on the research of the transition metal oxide nanomaterials, we use hydrothermal and wet chemical methods to prepare new nanocomposite materials and nanoarray structures to improve the storage capacity and cycle performance of LIBs. The contents are as follows:(1) SnO2/NiO core-shell nanobelts have been used as anodes of LIBs to improve the storage capacity and cycle performance of LIBs. SnO2/NiO core-shell nanobelts are synthesized via a wet chemical method and SnO2 nanoparticles are uniformly coated on the surface of NiO nanobelts. SnO2/NiO core-shell nanobelts exhibit higher reversible capacity and better cycling performance than individual NiO or SnO2 materials. The excellent performance can be attributed to the synergistic effect between SnO2 and NiO.(2) α-Fe2O3/SnO2 core-shell nanorod arrays have been used as LIB anodes to improve storage capacity and cycle performance of LIBs. This is the first time that α-Fe2O3/SnO2 core-shell nanorod arrays on titanium foils have been assembled by a facile method without using any templates. The method is simple, morphology-controlled, low-cost and low-difficulty of synthesis. The reversible capacity, cyclability and rate capability are very high. Such high performances can be attributed to the synergistic effect between them and the nanoarray structures.(3) α-MnO2/GNS nanoarrays have been used LIB anodes to improve storage capacity and cycle performance of LIBs. α-MnO2/GNS nanoarrays are synthesized via a facile wet-chemical route, and α-MnO2 nanosheets are uniformly distributed on the surface of graphene. Their high performance as lithium ion battery anodes is obtained. Such a performance can be attributed to the synergistic effect between α-MnO2 and GNS.