Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 6, Pages 3883-3891Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b10759
Keywords
fluorination; composite cathode material; high rate capability; high voltage spinel; phase transformation; lithium ion battery
Ask authors/readers for more resources
This study is aimed to explore the effect of fluoride doping and the associated structural transformation on lithium-rich layered cathode materials. The polymeric fluoride source is first adopted for synthesizing lithium intercalated oxide through a newly developed organic precipitation process. A heterostructured spinel/layered composite cathode material is obtained after appreciable fluorination and a superior rate capability is successfully achieved. The fluoride dopant amount and the surface spinel phase are evidenced and systematically examined by various structural spectroscopy and electrochemical analysis. It appears the reversible Ni2+/4+ redox couple at high voltage regime around 4.8 V because of the formation of spinel LiNi1/2Mn3/2O4 phase. The mechanism of layer to spinel phase transformation is discussed in detail.
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