MoO_2/GO薄膜电极的制备及其电化学性能的研究

Synthesis and Electrochemical Properties of MoO_2/GO Thin Film Electrodes for Li-ion Batttery

结合电化学沉积法和浸渍法制备了不同层数"三明治"结构的MoO_2/GO复合薄膜电极材料,将其直接作为电极装配成锂电池进行电化学性能研究。结果表明:二氧化钼纳米颗粒分布均匀,缩短沉积时间(1 min)和沉积层数(2层)时,复合薄膜的厚度仅为2.4μm,此时薄膜具有最佳的电化学性能,在0.1 C电流密度下进行充放电测试,首次放电比容量可达1 250 mAh/g,循环50次后放电比容量仍有781 mAh/g,表现出良好的电化学稳定性。

＂Sandwich＂structure MoO2/ GO thin film electrodes with different layers were prepared by electrochemical deposition and dip-coating method.The experimental results indicate that the diameter of the MoO2 nanoparticles with uniform distribution on the titanium substrate surface is 20 40 nm. The thickness of 2 layers MoO2/ GO film by electrodepositing 1 min for per layer is about 2.4 μm and it has the optimal electrochemical properties,that is,the initial discharge capacity is 1 250 mAh / g at 0.1 C current rate and the discharge capacity still remains 781 mAh / g after 50 cycles,which shows excellent electrochemical stability.