Journal
JOURNAL OF POWER SOURCES
Volume 226, Issue -, Pages 140-148Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.10.077
Keywords
Lithium manganese oxide; Porous spheres structure; Topochemical synthesis; Lithium ion battery
Funding
- Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality, PHR (IHLB)
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A facile topochemical route has been developed to synthesize porous LiMn2O4 spheres by using molten LiOH and porous Mn2O3 spheres as a template. The presence of pores with the average size of about 45 nm throughout the whole LiMn2O4 microspheres was confirmed by transmission electron microscope (TEM) and N-2 adsorption-desorption measurements. When applied as cathode materials for rechargeable lithium-ion batteries, the porous sphere LiMn2O4 revealed stable high-rate capability. The discharge capacity is 83 mAh g(-1) at 20 C rate, and it shows a good capacity retention after cycling at constantly changing discharge rate. Taking the excellent electrochemical performance and facile synthesis into consideration, the presented porous LiMn2O4 spheres could be a competitive candidate cathode material for high-performance lithium-ion batteries. (C) 2012 Elsevier B.V. All rights reserved.
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