本发明属于新能源材料技术领域，具体涉及一种利用简单的直接生长法获得三维纳米阵列金属硒化物电极的方法。采用直接生长法，电极的活性材料分数达到100％，而且活性材料的负载可以通过简单调节前驱体的量来调节。分级三维的纳米阵列结构保证了电极在高的活性材料负载下充分的电化学反应和快速的电荷转移。电极在钠离子电池上展现出非常优异的面积容量。在0.2mA cm‑2的电流密度,电池100个循环后仍有2.33mA h cm‑2的容量，容量保持率达到95％。在高的电流密度4.0mA cm‑2下，电池仍然拥有1.36mA h cm‑2的容量。由于高的面积容量和简单的制备过程，这种直接生长获得的三维纳米阵列金属硒化物电极对于钠离子电池的实际应用是非常有潜力的。
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