阴极
静电纺丝
电化学
材料科学
纳米材料
多孔性
化学工程
纳米技术
电池(电)
电极
复合材料
化学
聚合物
工程类
物理化学
功率(物理)
物理
量子力学
作者
Xiaojiang Hou,Qiang Shu,Kaiming Hou,Xiaohui Ye,Qianhong Cao,Danting Li,Lishuai Xie,Guoquan Suo
摘要
The dynamic characteristics and cycle stability of Mg/Li ion battery (MLIBs) cathodes are keys to develop the electric vehicles. This work proposes a strategy to construct one-dimensional (1D) porous nanomaterials, aiming to ameliorate the overall electrochemical properties of MLIBs. SnO2 cathodes with nano-fiber (NF-SnO2), nano-single tubular (NST-SnO2) and nano-multi-tubular (NMT-SnO2) structures were prepared by electrospinning technic, and the modification mechanism of SnO2 cathodes was discussed. NST-SnO2 and NMT-SnO2 cathodes show excellent cycle and capacity properties than that of NF-SnO2 cathode. The NST-SnO2 and NMT-SnO2 cathodes show discharge capacities of 138.2 and 286.4 mAh g−1 at 500 mA g−1 in the first cycle, the capacities after 50 cycles are 156.7 (113.38%) and 206.2 mAh g−1 (71.99%), which are higher than that of NF-SnO2 cathode 46.7 mAh g−1 (31.32%). The 69.09 and 118.01 mAh g−1 of NST-SnO2 and NMT-SnO2 are discharged at 2000 mA g−1. The electrochemical mechanism of modified nano-SnO2 cathodes in MLIBs is also elaborated. The porosity nanomaterials provide a guarantee for high-performance MLIBs and pave way for the construction of advanced SnO2 cathodes for MLIBs.
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