title: Three-Dimensional LiMnPO4·Li3V2(PO4)3/C Nanocomposite as a Bicontinuous Cathode for High-Rate and Long-Life Lithium-Ion Batteries.
abstract: Olivine-type LiMnPO4 has been extensively studied as a high-energy density cathode material for lithium-ion batteries. To improve both the ionic and electronic conductivities of LiMnPO4, a series of carbon-decorated LiMnPO4·Li3V2(PO4)3 nanocomposites are synthesized by a facile sol-gel method combined with the conventional solid-state method. The optimized composite presents a three-dimensional hierarchical structure with active nanoparticles well-embedded in a conductive carbon matrix. The combination of the nanoscale carbon coating and the microscale carbon network could provide a more active site for electrochemical reaction, as well as a highly conductive network for both electron and lithium-ion transportation. When cycled at 20 C, an initial specific capacity of 103 mA h g(-1) can be obtained and the capacity retention reaches 68% after 3000 cycles, corresponding to a capacity fading of 0.013% per cycle. The stable capacity and excellent rate capability make this carbon-decorated LiMnPO4·Li3V2(PO4)3 nanocomposite a promising cathode for lithium-ion batteries.
authors.affiliation: †State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
authors.forename: Yanzhu
authors.initials: Y
authors.lastname: Luo
authors.affiliation: †State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
authors.forename: Xu
authors.initials: X
authors.lastname: Xu
authors.affiliation: ‡WUT Powerful Energy Company, Ltd., Wuhan 430223, P. R. China.
authors.forename: Yuxiang
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: ‡WUT Powerful Energy Company, Ltd., Wuhan 430223, P. R. China.
authors.forename: Yuqiang
authors.initials: Y
authors.lastname: Pi
authors.affiliation: †State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
authors.forename: Mengyu
authors.initials: M
authors.lastname: Yan
authors.affiliation: †State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
authors.forename: Qiulong
authors.initials: Q
authors.lastname: Wei
authors.affiliation: †State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
authors.forename: Xiaocong
authors.initials: X
authors.lastname: Tian
authors.affiliation: †State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
authors.forename: Liqiang
authors.initials: L
authors.lastname: Mai
keywords: high rate; lithium-ion diffusion; lithium−manganese phosphate; lithium−vanadium phosphate; long life