Nanocrystal-constructed mesoporous single-crystalline Co₃O₄ nanobelts with superior rate capability for advanced lithium-ion batteries.
In this paper, one-dimensional (1D) mesoporous single-crystalline Co₃O₄ nanobelts are synthesized by a facile hydrothermal method followed by calcination treatment. The as-prepared nanobelts have unique mesoporous structures, which are constructed by many interconnected nanocrystals with sizes of about 20-30 nm. And typical size of the nanobelts is in the range of 100-300 nm in width and up to several micrometers in length. The BET surface area of Co₃O₄ nanobelts is determined to be about 36.5 m² g⁻¹ with dominant pore diameter of 29.2 nm. Because of the 1D structure, mesoporous morphologies and scrupulous nanoarchitectures, the Co₃O₄ nanobelts show excellent electrochemical performances such as high storage capacity and superior rate capability. The specific capacity of Co₃O₄ nanobelts could remains over 614 mA h g⁻¹ at a current density of 1 A g⁻¹ after 60 cycles. Even at a high current density of 3 A g⁻¹, these Co₃O₄ nanobelts still could deliver a remarkable discharge capacity of 605 mA h g⁻¹ with good cycling stability.
College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China.
Hui
H
Huang
Wenjun
W
Zhu
Xinyong
X
Tao
Yang
Y
Xia
Zhaoyang
Z
Yu
Junwu
J
Fang
Yongping
Y
Gan
Wenkui
W
Zhang
D003035:Cobalt / Q000737:chemistry*; D003460:Crystallization / Q000379:methods; D011211:Electric Power Supplies; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007477:Ions; D008094:Lithium / Q000737:chemistry* / Q000302:isolation & purification; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000295:instrumentation*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D016062:Porosity
D007477:Ions; D010087:Oxides; D003035:Cobalt; D008094:Lithium; C060728:cobalt oxide