Physical and electrochemical properties of spherical Li[Li{sub 0.2}Mn{sub 0.44}Ni{sub 0.18}Co{sub 0.18}]O{sub 2}/MnO{sub 2} composite as a cathode for rechargeable lithium-ion battery
Journal Article
·
· Materials Research Bulletin
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000 (China)
- Henan Kelong New Energy Co. Ltd., Xinxiang 453000 (China)
Graphical abstract: MnO{sub 2} was blended into pristine Li[Li{sub 0.2}Mn{sub 0.44}Ni{sub 0.18}Co{sub 0.18}]O{sub 2} and Li[Li{sub 0.2}Mn{sub 0.44}Ni{sub 0.18}Co{sub 0.18}]O{sub 2}/MnO{sub 2} composite was obtained. We can observe that the adding MnO{sub 2} in the composite participates in the electrochemical reaction and provide more active sites for lithiation/delithiation. - Highlights: • Li[Li{sub 0.2}Mn{sub 0.44}Ni{sub 0.18}Co{sub 0.18}]O{sub 2}/MnO{sub 2} composite was synthesized by incorporation of MnO{sub 2} into spherical Li[Li{sub 0.2}Mn{sub 0.44}Ni{sub 0.18}Co{sub 0.18}]O{sub 2}. • Properties of spherical Li-rich layered oxide can be greatly improved by adding MnO{sub 2}. • The reason for the improvement of Li[Li{sub 0.2}Mn{sub 0.44}Ni{sub 0.18}Co{sub 0.18}]O{sub 2}/MnO{sub 2} by adding MnO{sub 2} was explained. - Abstract: Spherical Li-rich layered Li[Li{sub 0.2}Mn{sub 0.44}Ni{sub 0.18}Co{sub 0.18}]O{sub 2} with high tap density and low specific surface area was synthesized. Furthermore, low cost and environmental benign MnO{sub 2} was blended into it and Li[Li{sub 0.2}Mn{sub 0.44}Ni{sub 0.18}Co{sub 0.18}]O{sub 2}/MnO{sub 2} composite was obtained. The properties of the materials were investigated by XRD, SEM and electrochemical method. The results showed that the existence of MnO{sub 2} in the composites can't change the structure of the pristine Li[Li{sub 0.2}Mn{sub 0.44}Ni{sub 0.18}Co{sub 0.18}]O{sub 2}. The electrochemical characteristics of Li[Li{sub 0.2}Mn{sub 0.44}Ni{sub 0.18}Co{sub 0.18}]O{sub 2}/MnO{sub 2} such as the initial coulombic efficiency, discharge capacity, rate characteristics and cyclability are much better than those of the pristine Li[Li{sub 0.2}Mn{sub 0.44}Ni{sub 0.18}Co{sub 0.18}]O{sub 2}. The contribution of MnO{sub 2} to the excellent characteristics of the cathode is as follows: the existence of MnO{sub 2} (i) provides more active site for lithiation/delitiation and (ii) suppresses side interaction between cathode particle surface and electrolyte.
- OSTI ID:
- 22420565
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 57; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
Similar Records
LiLaPO{sub 4}-coated Li[Ni{sub 0.5}Co{sub 0.2}Mn{sub 0.3}]O{sub 2} and AlF{sub 3}-coated Li[Ni{sub 0.5}Co{sub 0.2}Mn{sub 0.3}]O{sub 2} blend composite for lithium ion batteries
Electrochemical behaviors of Li[Li{sub (1-x)/3}Mn{sub (2-x)/3}Ni{sub x/3}Co{sub x/3}]O{sub 2} cathode series (0 < x < 1) synthesized by sucrose combustion process for high capacity lithium ion batteries
A novel cathode material with concentration-gradient for high energy and safe lithium-ion batteries.
Journal Article
·
Mon Oct 15 00:00:00 EDT 2012
· Materials Research Bulletin
·
OSTI ID:22215508
Electrochemical behaviors of Li[Li{sub (1-x)/3}Mn{sub (2-x)/3}Ni{sub x/3}Co{sub x/3}]O{sub 2} cathode series (0 < x < 1) synthesized by sucrose combustion process for high capacity lithium ion batteries
Journal Article
·
Sun Nov 30 23:00:00 EST 2008
· Materials Research Bulletin
·
OSTI ID:21195042
A novel cathode material with concentration-gradient for high energy and safe lithium-ion batteries.
Journal Article
·
Sun Feb 07 23:00:00 EST 2010
· Adv. Funct. Mater.
·
OSTI ID:975463