Facile Synthesis of Carbon-Coated Li3VO4 Anode Material
and its Application in Full Cells
Wang, XT (Wang, Xueting)[ 1,2,3 ] ; Qin, B (Qin, Bin)[ 1,2,3 ] ; Sui, D (Sui, Dong)[ 1,2,3 ] ; Sun, ZH (Sun, Zhenhe)[ 1,2,3 ] ; Zhou, Y (Zhou, Ying)[ 1,2,3 ] ; Zhang, HT(Zhang, Hongtao)[ 1,2,3,4 ] ; Chen, YS (Chen, Yongsheng)[ 1,2,3,4 ]
ENERGY TECHNOLOGY, 2018, 6(10): 2074-2081
DOI: 10.1002/ente.201800186
WOS:000449676400027
Abstract
Li3VO4 is a
promising anode material for lithium-ion batteries, but suffers from low
electronic conductivity. Here we demonstrated a facile solid-state method to
synthesize carbon-coated Li3VO4 (LVO/C) to enhance its electronic conductivity
and electrochemical performance. The LVO/C composites exhibit preferable
specific capacity, desirable cycle performance and suitable rate performance
than the carbon-free Li3VO4. A high reversible capacity of 456 mAh/g and 400
mAh/g can be maintained up to 100 cycles and 500 cycles at 1 C (92.2 % and 80 %
retention of the second cycle of discharge capacity, respectively). Coupled
with conventional cathodes, the fabricated full cells can deliver higher energy
density than their commercial counterparts using Li4Ti5O12 anodes and exhibit
much more stable cycle performance than full cells using graphite anodes. The
LiFePO4-LVO/C full cell delivers an excellent cycling stability with capacity
retention of 99 % vs. the second cycle after 100 cycles at 1 C. The
LiNi0.8Co0.1Mn0.1O2-LVO/C full cell delivers a maximum energy density of about
300 Wh/kg.