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Li3VO4 has been considered as a promising insertion-type anode for lithium-ion batteries due to its high theoretical specific capacity and suitable operating voltage platform. However, this promising anode still suffers from poor electrical conductivity. To address this issue, herein, a porous carbon supported Li3VO4 composites (Li3VO4/C) via a facile agitation-drying method combined with subsequent calcination is reported, in which Ketjen black carbon with high porosity, easy dispersion and excellent conductivity can serve as one of carbon sources. The Li3VO4/C composite prepared at 700 °C with a carbon content of ~ 10% exhibits the optimized structure. The void space of the composite accommodates the volume changes during the charge/discharge process. Meanwhile, the carbon shell serves as a conductive skeleton to provide bi-continuous Li ions and electrons pathways. Electrochemical results reveal that the composite delivers a high initial discharge capacity of 572 mAh·g−1 and maintains a capacity of 442.9 mAh·g−1 after 100 cycles at 100 mA·g−1. Even at a high current density of 2 A·g−1, a considerable capacity of 243.8 mAh·g−1 can still be obtained. This work provides a promising approach for the practical application of Li3VO4 as anode material for LIBs. [ABSTRACT FROM AUTHOR]

Objective: To study the growth and yield of Elephantopus scaber under different light conditions., Methods: Several main characters and yield performances were studied under six shading treatment as well as two planting patterns., Results: The plant height, leaf number, root length and root-shoot ratio were increased under moderate shading. With the increase of shading ratio, the process of Elephantopus scaber vegetative growth to reproductive growth were shortened, seed yield, dry biomass and root yield decreased as well. Among different shading treatments, dry seed-yield showed 8. 46 ~31. 10 kg/667 m2 dry biomass showed 327. 28 ~ 800. 95 kg/ 667 m2 and dry root yield showed 30. 65 ~ 70. 72 kg/667 m2., Conclusion: Elephantopus scaber is a light-demanding but shade-tolerant plant. The patterns of hole seeding were suggested in planting, and not more than 60% shade density may be good under plantations.