Defective ZnFe₂O₄/graphene (D-ZFO/G) composites are synthesized by a novel laser irradiation route. D-ZFO/G composites with unique architecture satisfy all the kinetic requirements for a desirable electrode material. Particularly, oxygen vacancies lied in D-ZFO/G provide abundant active sites for electrochemical reactions and enhance the intrinsic conductivity of ZFO for fast electron transport in D-ZFO/G electrode. D-ZFO/G composites then achieve a large specific charge of 474 C g⁻¹ at 1 A g⁻¹, high rate capability (95.8% at 10 A g⁻¹), and excellent cycle life (98.9% capacity retention after 20,000 cycles).

ZnFe ₂ O ₄ /石墨烯（D-ZFO / G）复合材料是通过新颖的激光辐照途径合成的。具有独特结构的D-ZFO / G复合材料满足了所需电极材料的所有动力学要求。尤其是，D-ZFO / G电极中存在的氧空位为电化学反应提供了丰富的活性位点，并增强了ZFO的固有电导率，以便在D-ZFO / G电极中快速进行电子传输。然后，D-ZFO / G复合材料在1 A g ^-1下可获得474 C g ^-1的大比电荷，高倍率能力（在10 A g ^-1下为95.8％）和出色的循环寿命（20,000后的98.9％的容量保持率）周期）。