From zinc-cyanide hybrid coordination polymers to hierarchical yolk-shell structures for high-performance and ultra-stable lithium-ion batteries

From zinc-cyanide hybrid coordination polymers to hierarchical yolk-shell structures for high-performance and ultra-stable lithium-ion batteries

Uniform zinc-cyanide hybrid coordination polymer microspheres were successfully synthesized by a coprecipitation method. Then hierarchical yolk-shell structured and carbon coated ZnO microspheres (YC-ZnO) composed of ZnO@C nanocrystals were prepared by consecutive post annealing processes of these m...

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Bibliographic Details
Main Authors: Fan, Haosen, Yu, Hong, Zhang, Yufei, Guo, Jing, Wang, Zhen, Wang, Hao, Hao, Xi, Zhao, Ning, Geng, Hongbo, Dai, Zhengfei, Yan, Qingyu, Xu, Jian
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2017
Subjects:
Coordination polymers
Batteries
Online Access:https://hdl.handle.net/10356/83458
http://hdl.handle.net/10220/42623
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Institution: Nanyang Technological University
Language: English
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Summary:Uniform zinc-cyanide hybrid coordination polymer microspheres were successfully synthesized by a coprecipitation method. Then hierarchical yolk-shell structured and carbon coated ZnO microspheres (YC-ZnO) composed of ZnO@C nanocrystals were prepared by consecutive post annealing processes of these microspheres in argon and air atmosphere. Such micro-nano porous structures have the advantages of large specific surface area, good charge transport kinetics, and large cavity to accommodate the volume change and maintain the mechanical integrity of the electrode material. When evaluated as anode materials of lithium ion batteries, these ZnO yolk-shell spheres exhibited excellent battery performance with a high rate capacity and ultra-stable cycling stability.

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