Yue Bin, Hu Quanli, Ji Lei, Wang Yin, Liu Jinghai
Nano Innovation Institute (NII), Inner Mongolia Key Lab of Carbon Nanomaterials, College of Chemistry and Chemical Engineering, Inner Mongolia University for Nationalities (IMUN) Tongliao 028-000 People's Republic of China
RSC Adv. 2019 Nov 22;9(65):38271-38279. doi: 10.1039/c9ra07660c. eCollection 2019 Nov 19.
A facile synthesis of perovskite-type CeMnO nanofibers as a high performance anode material for lithium-ion batteries was demonstrated. The nanofibers were prepared by the electrospinning technique. The characterization of CeMnO nanofibers was carried out by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy. SEM images manifested nanofibers with a diameter of 470 nm having a rough surface with a porous structure. TEM images were consistent with the observations from the SEM images. The electrochemical properties of CeMnO perovskite in lithium-ion batteries were investigated. The CeMnO anode exhibited a discharge capacity of 2159 mA h g with a coulombic efficiency of 93.79%. In addition, a high cycle stability and a capacity of 276 mA h g at the current density of 1000 mA g can be effectively maintained due to the high Li conductivity in the CeMnO anode. This study could provide an efficient and potential application of perovskite-type CeMnO nanofibers in lithium-ion batteries.
展示了一种简便合成钙钛矿型CeMnO纳米纤维作为锂离子电池高性能负极材料的方法。纳米纤维通过静电纺丝技术制备。通过X射线衍射、傅里叶变换红外光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和X射线光电子能谱对CeMnO纳米纤维进行了表征。SEM图像显示直径为470 nm的纳米纤维表面粗糙且具有多孔结构。TEM图像与SEM图像的观察结果一致。研究了CeMnO钙钛矿在锂离子电池中的电化学性能。CeMnO负极的放电容量为2159 mA h g，库仑效率为93.79%。此外，由于CeMnO负极中高的Li电导率，在1000 mA g的电流密度下可以有效地保持高循环稳定性和276 mA h g的容量。该研究可为钙钛矿型CeMnO纳米纤维在锂离子电池中的高效和潜在应用提供依据。
