Wang Bo, Li Songmei, Wu Xiaoyu, Liu Jianhua, Tian Wenming
Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing, 100191, China.
Phys Chem Chem Phys. 2016 Jan 14;18(2):908-15. doi: 10.1039/c5cp04820f.
Novel three-dimensional (3D) NiMoO4 nanowire arrays (NWAs) grown directly onto the surface of macroporous graphene foams (GF) with robust adhesion were synthesized via a facile chemical vapor deposition (CVD) and subsequent hydrothermal route. The as-prepared NiMoO4 nanowires are composed of ultra-small nanoparticles (∼5 nm) with a diameter of 70-150 nm and are several micrometers in length. Such as-grown NiMoO4 NWA/3DGF composites are then evaluated as monolithic electrodes for lithium-ion batteries (LIBs) without the need of binders or metal-based current collectors. Benefitting from the unique three-dimensional arrayed architecture and characteristics with a high specific surface area and more active sites which facilitate fast electron and ionic transport within the electrode, the NiMoO4 NWA/GF composites deliver a high reversible specific capacity of 1088.02 mA h g(-1) at a current density of 200 mA g(-1) and 867.86 mA h g(-1) after 150 cycles (79.77% retention of the second cycle), and excellent rate capability. With the advantages of excellent electrochemical performance and a facile synthesis method, the NiMoO4 nanowire arrays supported on 3DGF exhibit great potential as anode materials for LIBs.
通过简便的化学气相沉积（CVD）和后续水热法，合成了直接生长在具有强附着力的大孔石墨烯泡沫（GF）表面的新型三维（3D）钼酸镍纳米线阵列（NWA）。所制备的钼酸镍纳米线由直径为70 - 150 nm的超小纳米颗粒（约5 nm）组成，长度为几微米。如此生长的钼酸镍NWA/3DGF复合材料随后被评估为用于锂离子电池（LIB）的整体电极，无需使用粘合剂或金属基集流体。受益于独特的三维阵列结构以及具有高比表面积和更多活性位点的特性，这有利于电极内快速的电子和离子传输，钼酸镍NWA/GF复合材料在200 mA g(-1)的电流密度下提供了1088.02 mA h g(-1)的高可逆比容量，在150次循环后为867.86 mA h g(-1)（为第二循环的79.77%），并且具有优异的倍率性能。凭借优异的电化学性能和简便的合成方法的优势，负载在3DGF上的钼酸镍纳米线阵列作为LIB的负极材料展现出巨大潜力。
