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Synthesis of Co 2 V 2 O 7 Hollow Cylinders with Enhanced Lithium Storage Properties using H 2 O 2 as an Etching Agent
Author(s) -
Wang Jinli,
Pei Jian,
Hua Ke,
Chen Dahong,
Jiao Yang,
Hu Yongyuan,
Chen Gang
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201701194
Subject(s) - electrochemistry , anode , lithium (medication) , materials science , etching (microfabrication) , electrode , diffusion , hexagonal crystal system , current density , analytical chemistry (journal) , chemical engineering , nanotechnology , crystallography , chemistry , medicine , physics , layer (electronics) , quantum mechanics , chromatography , engineering , thermodynamics , endocrinology
The construction of hollow structures has been used as an efficient strategy to improve electrochemical properties in lithium‐ion batteries (LIBs). In this paper, novel Co 2 V 2 O 7 hollow cylinders have been fabricated via a unique etching process, in which H 2 O 2 and CO(NH 2 ) 2 were selected as the etching agent and the release rate controlling agent, respectively. The formation process for the hollow structure and the etching mechanism have been investigated. Benefiting from the improved diffusion and transport of Li + , the Co 2 V 2 O 7 hollow cylinder electrode demonstrates higher electrochemical performance as an anode material for LIBs than that of Co 2 V 2 O 7 solid hexagonal prisms. Under a current density of 0.4 A g −1 , the cycling capacity can be improved to 2.5 times greater than that of non‐etched hexagonal prisms.