Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 20, Pages 6896-6905Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.06.030
Keywords
Surface coating; Electrochemical properties; Cathode; Lithium battery
Categories
Funding
- Ministry of Education, Science and Technology [2010K001089]
Ask authors/readers for more resources
A Li[Ni0.4Co0.3Mn0.3]O-2 cathode was modified by applying a La2/3-XLi3XTiO3 (LLT) coating. Transmission electron microscope (TEM) images reveal that the coating layer consists of nanoparticles. The coated cathode demonstrated an enhanced rate capability, discharge capacity, and cyclic performance than the uncoated cathode. However, the influence of the coating upon these electrochemical properties is highly dependent upon the composition of the LLT coating layer. Coating layers having high La and low Li contents, such as La0.67TiO3, effectively improved the rate capability of the cathode. However, coating layers with a low La and high Li content greatly enhanced the discharge capacity of the cathode under high cut-off voltage (4.8 V) conditions. Overall, the thermal stability of the Li[Ni0.4Co0.3Mn0.3]O-2 electrode was improved by the LLT coating. Storage tests confirmed that the La2/3-XLi3XTiO3 coating dramatically suppressed the dissolution of transition metals into the electrolyte. (C) 2011 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available