Multicore-shell carbon-coated lithium manganese phosphate and lithium vanadium phosphate composite material with high capacity and cycling performance for lithium-ion battery. (1st July 2015)

• Record Type: Journal Article
• Authors: Zhang, Jia-feng; Wang, Xiao-wei; Zhang, Bao; Peng, Chun-li; Tong, Hui; Yang, Zhan-hong
• Is Part Of: Electrochimica acta. Volume 169(2015)
• Page Start: 462
• Page End: 469
• Publication Date: 2015-07-01
• Subjects: Li-ion batteries -- Cathode material -- Special core-shell structure -- Lithium manganese phosphate -- Lithium vanadium phosphate; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.03.091
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: The energy crisis and energy security leads a great attention to Li-ion batteries (LIB) as the excellent power candidates. We successfully synthesized LiMnPO4 ·Li3 V2 (PO4 )3 /C composite cathode material with high capacity and excellent cycling performance from prickly MnV2 O6 ·2H2 O precursor, following chemical reduction and lithiation with double carbon sources. The LiMnPO4 ·Li3 V2 (PO4 )3 /C sample has a special multicore-shell structure, whose inner stuffing are LiMnPO4 and Li3 V2 (PO4 )3 in the range of 5-25nm. The initial discharge capacity of LiMnPO4 ·Li3 V2 (PO4 )3 /C composite delivers 221.4 mAh g −1, 202.3 mAh g −1 and 152.9 mAh g −1 at the rate of 0.1C, 1C and 5C in the range of 1.5-4.5 V, and retains 99.5%, 99.1% and 94.3% of its initial discharge capacity after 50 cycles, respectively.