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Formation of NiCo 2 V 2 O 8 Yolk–Double Shell Spheres with Enhanced Lithium Storage Properties
Author(s) -
Lu Yan,
Nai Jianwei,
Lou Xiong Wen David
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201800363
Subject(s) - materials science , anode , lithium (medication) , annealing (glass) , nanotechnology , template , ion , nanostructure , nanomaterials , chemical engineering , spheres , ion exchange , metal , chemistry , electrode , physics , composite material , metallurgy , organic chemistry , medicine , astronomy , engineering , endocrinology
Complex nanostructures with multi‐components and intricate architectures hold great potential in developing high‐performance electrode materials for lithium‐ion batteries (LIBs). Herein, we demonstrate a facile self‐templating strategy for the synthesis of metal vanadate nanomaterials with complex chemical composition of NiCo 2 V 2 O 8 and a unique yolk–double shell structure. Starting with the Ni‐Co glycerate spheres, NiCo 2 V 2 O 8 yolk–double shell spheres are synthesized through an anion‐exchange reaction of Ni‐Co glycerate templates with VO 3 − ions, followed by an annealing treatment. By virtue of compositional and structural advantages, these NiCo 2 V 2 O 8 yolk–double shell 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 Ag −1 .