BiVO₄ nanowire array is fabricated by a hydrothermal method, and the nanowire array and a lithium foil are used as working and counter electrodes, respectively, to assemble a lithium-ion battery. After charging to 4 V, the BiVO₄ nanowire array has a strong oxidizing property. The pyrrole can be in-situ polymerized on the surface of the charged BiVO₄ nanowire array to form a polypyrrole coating layer in pyrrole solution. The morphology and structure properties of the samples are characterized and analyzed in detail. The lithium storage performances of the samples are also measured and compared. The obtained BiVO₄-PPy nanowires have stable cycle performance and a discharge capacity of more than 400 mAh g⁻¹ after 50 cycles. This work provides a new method for synthesizing conductive polymers on charged electrodes.

通过水热法制造BiVO ₄纳米线阵列，并将纳米线阵列和锂箔分别用作工作电极和对电极，以组装锂离子电池。充电至4 V后，BiVO ₄纳米线阵列具有很强的氧化性能。吡咯可以在带电的BiVO ₄纳米线阵列的表面上原位聚合，以在吡咯溶液中形成聚吡咯涂层。对样品的形貌和结构特性进行了表征和详细分析。还测量并比较了样品的锂存储性能。将所得到的BiVO _4个-PPy纳米线具有稳定的循环性能和超过400毫安g的放电容量^{- 1}50个周期后。这项工作提供了一种在带电电极上合成导电聚合物的新方法。