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

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 LiNi_0.5Mn_1.5O₄ 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 LiNi_0.5Mn_1.5O₄ 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 LiNi_0.5Mn_1.5O₄ 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.

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