3 years ago

Carbon-Coated Li3VO4 Spheres as Constituents of an Advanced Anode Material for High-Rate Long-Life Lithium-Ion Batteries

Carbon-Coated Li3VO4 Spheres as Constituents of an Advanced Anode Material for High-Rate Long-Life Lithium-Ion Batteries
Yan Yu, Shuangqiang Chen, Laifa Shen, Joachim Maier
Lithium-ion batteries are receiving considerable attention for large-scale energy-storage systems. However, to date the current cathode/anode system cannot satisfy safety, cost, and performance requirements for such applications. Here, a lithium-ion full battery based on the combination of a Li3VO4 anode with a LiNi0.5Mn1.5O4 cathode is reported, which displays a better performance than existing systems. Carbon-coated Li3VO4 spheres comprising nanoscale carbon-coating primary particles are synthesized by a morphology-inheritance route. The observed high capacity combined with excellent sample stability and high rate capability of carbon-coated Li3VO4 spheres is superior to other insertion anode materials. A high-performance full lithium-ion battery is fabricated by using the carbon-coated Li3VO4 spheres as the anode and LiNi0.5Mn1.5O4 spheres as the cathode; such a cell shows an estimated practical energy density of 205 W h kg−1 with greatly improved properties such as pronounced long-term cyclability, and rapid charge and discharge. Advanced carbon-coated LVO (LVO⊂C) sub-micrometer spheres comprising nanoscale carbon-coating primary particles are synthesized by a morphology-inheritance route. When combined with a LiNi0.5Mn1.5O4 cathode, the rationally designed full cell demonstrates an estimated energy density of 205 W h kg−1, high-power performances up to 20 C, and pronounced long-term cyclability.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adma.201701571

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