本发明公开一种Co3O4@石墨烯纤维超级电容器电极材料的制备方法。该Co3O4@石墨烯纤维超级电容器电极材料通过水热法，在石墨烯纤维的表面包覆生长Co3O4纳米线及纳米片，且纳米线及纳米片相互交错形成大量连通的空间孔洞结构，具有非常大的比表面积。合成的Co3O4@石墨烯纤维超级电容器电极电极在三电极体系下测试，表现出236.8 F g‑1的高比容量及良好的电化学性能。本发明制备方法简单、成本低；制得的Co3O4@石墨烯纤超级电容器电极维材料具有比表面积大、比电容高、循环性能好的优点。另外因其高电导性、强度及柔性可编织的特性，在可穿戴电子设备上具有巨大的应用前景。
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