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Fabrication Based on the Kirkendall Effect of Co 3 O 4 Porous Nanocages with Extraordinarily High Capacity for Lithium Storage
Author(s) -
Hu Lin,
Yan Nan,
Chen Qianwang,
Zhang Ping,
Zhong Hao,
Zheng Xinrui,
Li Yan,
Hu Xianyi
Publication year - 2012
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.201200770
Subject(s) - nanocages , kirkendall effect , materials science , fabrication , porosity , lithium (medication) , chemical engineering , nanoparticle , nanotechnology , lithium ion battery , thermal decomposition , prussian blue , battery (electricity) , electrode , electrochemistry , chemistry , catalysis , metallurgy , composite material , organic chemistry , alternative medicine , endocrinology , pathology , engineering , power (physics) , quantum mechanics , medicine , physics
Abstract Herein we report a novel facile strategy for the fabrication of Co 3 O 4 porous nanocages based on the Kirkendall effect, which involves the thermal decomposition of Prussian blue analogue (PBA) Co 3 [Co(CN) 6 ] 2 truncated nanocubes at 400 °C. Owing to the volume loss and release of internally generated CO 2 and N x O y in the process of interdiffusion, Co 3 O 4 nanocages with porous shells and containing nanoparticles were finally obtained. When evaluated as electrode materials for lithium‐ion batteries, the as‐prepared Co 3 O 4 porous nanocages displayed superior battery performance. Most importantly, capacities of up to 1465 mA h g −1 are attained after 50 cycles at a current density of 300 mA g −1 . Moreover, this simple synthetic strategy is potentially competitive for scaling‐up industrial production.