As a multifunctional material with excellent performances, layered double hydroxides (LDHs) and their composites have broad application prospects in energy storage, catalysis, environmental protection, drug release and other fields. In this study, three-dimensional (3-D) graphene-like carbon nanosheets (AGC) were prepared by one-step synthesis method as active carrier materials, and then MnCo-LDHs nanoflowers assembled with ultrafine nanosheets were loaded on them to construct a newly 3-D architecture of AGC/MnCo-LDHs nanocomposites. The nanocomposites were characterized by XRD, SEM, TEM and XPS. The composite materials were assembled into OER and ORR electrodes for electrochemical measurements as efficient bifunctional catalysts. The favorable 3-D porous architecture (fast ion diffusion) of MnCo-LDHs and carrier effect of AGC (high electron conductivity) were the key contributing factors for their excellent electrochemical performances of nanocomposites.

作为一种性能优异的多功能材料，层状双氢氧化物（LDHs）及其复合材料在储能、催化、环保、药物释放等领域具有广阔的应用前景。本研究通过一步合成法制备了三维（3-D）类石墨烯碳纳米片（AGC）作为活性载体材料，然后将与超细纳米片组装在一起的MnCo-LDHs纳米花负载在其上构建了一个AGC/MnCo-LDHs 纳米复合材料的新 3-D 结构。通过XRD、SEM、TEM和XPS对纳米复合材料进行表征。复合材料组装成 OER 和 ORR 电极，作为高效的双功能催化剂进行电化学测量。