Solvo-Thermal Synthesis of H₆V₄O₁₀ Microspheres as Stable Electrode Materials for Lithium and Zinc-ion Batteries

摘要

NH 4 V 4 O 10 based ammonium vanadium bronze has been widely investigated as a cathode material forlithium-ion batteries. A V 4 O 10 group based H 6 V 4 O 10 might be a potential anode material due to its highhydrogen content and similar composition. Microspheres modified by loosely distributed nanoparticlesshowed higher discharge capacity and better cycling stability than those composed of tightly packedmicro-blocks for lithium-ion batteries and zinc-ion batteries. The former can steadily cycle at currentdensities of 400 mA g -1 for 1000 cycles with a capacity of up to 387 mA h g -1 . The discharge capacityof aqueous zinc-ion batteries can be up to 238.8 mA h g -1 with a capacity retention of 87.8% after 26cycles. The improved electrochemical performance can be ascribed to the nanoparticles modifying theloose surface, which promotes ion and electron transfer.