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2015 ; 5
(ä): 10733
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Advanced aqueous rechargeable lithium battery using nanoparticulate LiTi2(PO4)3/C
as a superior anode
#MMPMID26035774
Sun D
; Jiang Y
; Wang H
; Yao Y
; Xu G
; He K
; Liu S
; Tang Y
; Liu Y
; Huang X
Sci Rep
2015[Jun]; 5
(ä): 10733
PMID26035774
show ga
Poor cycling performance arising from the instability of anode is still a main
challenge for aqueous rechargeable lithium batteries (ARLB). In the present work,
a high performance LiTi2(PO4)3/C composite has been achieved by a novel and
facile preparation method associated with an in-situ carbon coating approach. The
LiTi2(PO4)3/C nanoparticles show high purity and the carbon layer is very
uniform. When used as an anode material, the ARLB of LiTi2(PO4)3/C//LiMn2O4
delivered superior cycling stability with a capacity retention of 90% after 300
cycles at 30 mA g(-1) and 84% at 150 mA g(-1) over 1300 cycles. It also
demonstrated excellent rate capability with reversible discharge capacities of
115 and 89 mAh g(-1) (based on the mass of anode) at 15 and 1500 mA g(-1),
respectively. The superior electrochemical properties should be mainly ascribed
to the high performance of LiTi2(PO4)3/C anode, benefiting from its
nanostructure, high-quality carbon coating, appropriate crystal structure and
excellent electrode surface stability as verified by Raman spectra,
electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD) and
scanning electron microscopy (SEM) measurements.