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Topochemical Synthesis of Cobalt Oxide‐Based Porous Nanostructures for High‐Performance Lithium‐Ion Batteries
Author(s) -
Li Cheng Chao,
Yin Xiao Ming,
Li Qiu Hong,
Chen Li Bao,
Wang Tai Hong
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201002275
Subject(s) - cobalt , materials science , cobalt oxide , cobalt hydroxide , chemical engineering , oxide , inorganic chemistry , hydroxide , kirkendall effect , nucleation , lithium (medication) , dissolution , nanostructure , nanotechnology , chemistry , electrochemistry , electrode , metallurgy , organic chemistry , medicine , engineering , endocrinology
Two kinds of topochemical conversion routes from cobalt hydroxide precursors to cobalt oxide‐based porous nanostructures are presented: pyrolysis in air and hydrothermal treatment by the Kirkendall diffusion effect. These cobalt hydroxide precursors were synthesized by a simple hydrothermal approach with sodium acetate as mineralizer at 200 °C. Detailed proof indicates that the process of cobalt hydroxide precursor growth is dominated by a nucleation, dissolution, renucleation, growth, and exfoliation mechanism. By the topochemical conversion processes several Co 3 O 4 nanostructures, such as cobalt oxide‐coated cobalt hydroxide carbonate nanowires, cobalt oxide nanotubes, hollow cobalt oxide spheres, and porous cobalt oxide nanowires, have been synthesized. The obtained Co 3 O 4 nanostructures have also been evaluated as the anode materials in lithium‐ion batteries. It was found that the as‐prepared Co 3 O 4 nanostructures exhibited high reversible capacity and good cycle performance due to their porous structure and small size.