Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 5, Issue 13, Pages 6292-6299Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am401330g
Keywords
NiO; X-ray diffraction; self-assembly; porous structure; chemical solution process; lithium-ion battery
Funding
- National Research Foundation Singapore [NRF-CRP8-2011-04]
- NUS-FOE Energy Research for Sustainability Initiatives [R284000089112]
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A nickel salt-urea-H2O ternary system has been developed for the large-scale synthesis of hierarchical alpha-Ni(OH)(2) microspheres, the solid precursor for the subsequent topotactic transition to NiO upon calcination. In this facile synthetic system, hierarchical structure is self-assembled under the cooperative direction of urea and anions in nickel salts. Thus, simply tuning the Ni salts leads to the selective construction of urchin and flowerlike hierarchical alpha-Ni(OH)(2) and NiO microspheres consisting of radial 1D nanowires and 2D nanoplates, respectively. The obtained NiO microspheres possessing accessible nanopores, excellent structural stability and large surface area up to 130 m(2)/g show promising electrochemical performance in anodic lithium storage for lithium-ion battery.
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