Large-scale synthesis of hierarchical SnO spheres assisted with poly (N-isopropylacrylamide) for high lithium storage capacity
Large-scale synthesis of hierarchical SnO spheres assisted with poly (N-isopropylacrylamide) for high lithium storage capacity
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DOI：
10.1016/j.ceramint.2018.10.006
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发表时间：
2019-01
影响因子：
5.2
通讯作者：
Jinghua Zeng;C. Peng;Ri-chu Wang;Yajing Liu;Xiao-feng Wang;Jun Liu
中科院分区：
文献类型：
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作者：
Jinghua Zeng;C. Peng;Ri-chu Wang;Yajing Liu;Xiao-feng Wang;Jun Liu
在热敏聚合物聚n -异丙基丙烯酰胺（PNIPAM）作为表面活性剂的辅助下，采用一锅法在水溶液中成功制备了分层氧化锡（SnO）球。合成的SnO球由厚度为20 nm，长度为几纳米的不规则SnO纳米片组装而成，表面被SnO纳米颗粒均匀修饰。这种层次化结构的形成是通过模板导向生长和自组装过程的协同作用来实现的。研究了分层SnO作为锂离子电池负极材料的电化学性能。as-synthesized SnO导致一个优秀的电化学性能高特点的具体容量(275 mAh 克−1 500马 克−1),循环稳定性(400 mAh g−1 70年后充放电周期在200马 g−1 49%容量保留),和高速率性能(119 mAh g−1 1 g−1)。该方法为大规模制备高纯度、低价过渡金属氧化物（TMOs）阳极材料提供了一种有吸引力的替代方法。
Hierarchical tin monoxide (SnO) spheres were successfully prepared by using a new facile route, i.e., a one-pot method in an aqueous solution with the assistance of a thermosensitive polymer, poly (N-isopropylacrylamide) (PNIPAM), acting as a surfactant. The synthesized SnO spheres were assembled from irregular SnO nanosheets, which have a thickness of 20 nm and are several nanometers in length, with a rough surface homogeneously decorated by SnO nanoparticles. The formation of this hierarchical structure is achieved through the cooperation of the template-directing growth and self-assembly process. The electrochemical performance of hierarchical SnO was examined as an anode material for lithium-ion batteries. The as-synthesized SnO leads to an excellent electrochemical performance as characterized by the high specific capacity (275 mAh g−1at 500 mA g−1), cycling stability (400 mAh g−1after 70 charge-discharge cycles at 200 mA g−1with 49% capacity retention), and high rate performance (119 mAh g−1at 1 A g−1). This one-step facial method may provide an attractive alternative approach to the large-scale preparation of high-purity and low-valence transition metal oxides (TMOs) anode materials.