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Smartly Designed Hierarchical MnO2@Fe3O4/CNT Hybrid Films as Binder‐free Anodes for Superior Lithium Storage
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2018-09-19 , DOI: 10.1002/asia.201800922
Du-Juan Yan 1 , Xiao-Dong Zhu 2, 3 , Xiao-Tian Gao 1 , Liang-Liang Gu 1 , Yu-Jie Feng 3 , Ke-Ning Sun 2, 3
Affiliation  

Nowadays, the development of advanced anode materials is highly desirable for the increasing demand for high‐performance lithium‐ion batteries (LIBs). Nanostructured MnO2 has received utmost attention due to high theoretical capacity (1230 mA h g−1), abundant resources, environmental benignity, and shortened electron and ion diffusion paths. Unfortunately, poor electronic conductivity and strong aggregation inclination of MnO2 nanostructures result in disappointing electrochemical performances, which restrict their practical application as sole institute. Here, we propose smartly designed MnO2@Fe3O4/CNT hybrid films, in which MnO2 nanosheets, Fe3O4 nanoparticles and CNTs are hierarchically assembled in a unique stage of nanosheets–nanoparticles–nanotubes. The resulting MnO2@Fe3O4/CNT hybrid films can be directly used as anodes without any polymer binders, and exhibit significant synergistic interactions among three components, achieving excellent reversible capacity and rate performance.

中文翻译:

巧妙设计的分层MnO2 @ Fe3O4 / CNT杂化薄膜作为无粘结剂阳极,可实现出色的锂存储

如今,对于高性能锂离子电池(LIB)的需求不断增长,非常需要开发先进的阳极材料。纳米结构的MnO 2由于具有较高的理论容量(1230 mA h g -1),丰富的资源,环境友好性以及缩短的电子和离子扩散路径而受到了极大的关注。不幸的是,较差的电导率和MnO 2纳米结构的强聚集倾向导致令人失望的电化学性能,这限制了它们作为唯一研究所的实际应用。在这里,我们提出了设计精巧的MnO 2 @Fe 3 O 4 / CNT杂化膜,其中MnO 2纳米片Fe3 O 4纳米颗粒和CNT是在纳米片-纳米颗粒-纳米管的独特阶段中进行分层组装的。所得的MnO 2 @Fe 3 O 4 / CNT杂化膜可直接用作阳极,而无需任何聚合物粘合剂,并且在三种组分之间显示出显着的协同作用,从而实现了优异的可逆容量和倍率性能。
更新日期:2018-09-19
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