Synthesis of cobalt sulfide multi-shelled nanoboxes with precisely controlled two to five shells for sodium-ion batteries

Synthesis of cobalt sulfide multi-shelled nanoboxes with precisely controlled two to five shells for sodium-ion batteries

We report the synthesis of cobalt sulfide multi-shelled nanoboxes through metal–organic framework (MOF)-based complex anion conversion and exchange processes.Thepolyvanadate ions react with cobalt-based zeolitic imidazolateframework-67 (ZIF-67) nanocubes to form ZIF-67/cobaltpolyvanadate yolk-shelle...

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Bibliographic Details
Main Authors: Wang, Xiao, Chen, Ye, Fang, Yongjin, Zhang, Jintao, Gao, Shuyan, Lou, David Xiong Wen
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2020
Subjects:
Engineering::Chemical engineering
Cobalt Sulfide
Ion-exchange Reaction
Online Access:https://hdl.handle.net/10356/138599
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Institution: Nanyang Technological University
Language: English
Description
Summary:We report the synthesis of cobalt sulfide multi-shelled nanoboxes through metal–organic framework (MOF)-based complex anion conversion and exchange processes.Thepolyvanadate ions react with cobalt-based zeolitic imidazolateframework-67 (ZIF-67) nanocubes to form ZIF-67/cobaltpolyvanadate yolk-shelled particles.The as-formed yolk-shelled particles are gradually converted into cobalt divanadatemulti-shelled nanoboxes by solvothermal treatment. Thenumber of shells can be easily controlled from 2to5byvarying the temperature.Finally,cobalt sulfide multi-shellednanoboxes are produced through ion-exchange with S2@ionsand subsequent annealing. The as-obtained cobalt sulfidemulti-shelled nanoboxes exhibit enhanced sodium-storageproperties when evaluated as anodes for sodium-ion batteries.Forexample,ahigh specific capacity of 438 mAhg@1can beretained after 100 cycles at the current density of 500 mAg@1.

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