Improving the Lithium‐Storage Properties of Self‐Grown Nickel Oxide: A Back‐Up from TiO₂ Nanoparticles

Abstract

After long electrochemical cycles,t he continuous loss in the capacityo fn ickel oxide (NiO) hinders its practical application as anode materialf or lithium-ion batteries. The need to improve the lithium-storage performance of NiO becomes essential for the accomplishment of high-performance lithium-ion batteries. In this respect, an ew form of 3D NiO, which comprises TiO 2 nanoparticles, has been fabricated and used as anode for lithium-ion storage. The as-prepared 3D NiO-TiO 2 nanocomposites achieved areal discharge capacities of 1.49 and 0.78 mAh cm À2 at current densities of 1.0 and 6.0 mA cm À2 , respectively.T he improvement in the lithium-storage properties of the NiO/TiO 2 nanocomposite is attributedt ot he TiO 2 nanoparticles creating rational interfaces with the NiO, which incredibly supports the NiO surfacea nd improves the structural stability.The low capacity of conventional graphite when used as an anode in lithium-ion batteries (LIBs) has made metal oxides become important lithium-ion battery anode materials not only due to their high theoretical capacity,w hich mostly doubles that of graphite, buta lso playasafe role during the electrochemical process because of their high potential around 1.0 V, which could avoid the problem of lithium plating at very low potential.[1] However, the use of metal oxides for LIBs has been limited mainly by their poor electrical conductivity,e asy agglomeration, and poor cyclic performance, resulting from al arge volumec hange during lithium intercalation and de-intercalation.[2] Since NiO is one of the most common metal oxides, considering its abundancy and low cost, it is also ap romising anode material for LIBs.[3] Compared to its theoretical capacity,t he low capacity of NiO obtained after long repeated cycles further limits its application as anode material for LIBs.[4] Enormous efforts have been made to enhancet he capacityo fN iO after cycling and numerousa dvancements have been achieved. These strategies include designing various nanostructured materials with controllable size, [5] crystallinity, [6] and chemical composition, [7] synthesizing porous and mesoporous NiO to increaset he electrode/electrolyte contact area, [8] using ag ood conductive matrix with carbonaceous materials [4a, 9] and combination with other metal oxidest of orm composites.[10]Recent works have demonstratedakind of additional Li storage generated at the interface of nanomaterials, which addresses that the interface of nanoparticleso rn anocrystals in an anocomposite electrode system can accommodate additional Li ions, leading to ar ise of the total Li storage.[11] For example,W ue tal. reported that TiO 2 -B nanodomains embedded in anatase TiO 2 enhances the lithium-storage capacity of TiO 2 due to coherent interfaces.[11b] Also, as uperior lithium-storage property was also exhibited with the generation of small TiO 2 nanocrystals at the interface of the TiO 2 hollow sphere and the nanocrystals.[12] Also, the small size of the nanoparticles (~5nm) has been reported to be ac rucia...

A review of carbon materials and their composites with alloy metals for sodium ion battery anodes

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Vanadium Nitride Nanowire Supported SnS2 Nanosheets with High Reversible Capacity as Anode Material for Lithium Ion Batteries

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MOF‐Derived Porous NixFe3‐xO4 Nanotubes with Excellent Performance in Lithium‐Ion Batteries

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