Angewandte Chemie - International Edition
Angewandte Chemie - International Edition
5 years ago

Formation of NiCo2V2O8 Yolk-Double-Shelled Spheres with Enhanced Lithium Storage Properties

Xiong-Wen (David) Lou
We demonstrate a facile self-templating strategy for the synthesis of metal vanadate nanomaterials with complex chemical composition of NiCo2V2O8 and a unique yolk-double-shelled structure. Starting with the Ni-Co glycerate spheres, NiCo2V2O8 yolk-double-shelled spheres are synthesized through an anion-exchange reaction of Ni-Co glycerate templates with VO3- ions, followed by an annealing treatment. By virtue of compositional and structural advantages, these NiCo2V2O8 yolk-double-shelled spheres manifest outstanding lithium storage properties when evaluated as anodes for LIBs. Impressively, an extra-high reversible capacity of 1228 mAh g-1 can be retained after 500 cycles at a high current density of 1.0 A g-1.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201800363

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