A novel bi-component composite of porous self-assembled micro-/nanostructured Ni_0.1Mn_0.9O_1.45 microellipsoids as high-performance anode electrocatalyst for microbial fuel cells (MFCs) is successfully synthesized via a simple coprecipitation reaction in microemulsion and calcination method in air atmosphere. The morphology and structural characterization indicate that the as-fabricated Ni_0.1Mn_0.9O_1.45 product is consist of Mn₂O₃ and NiMn₂O₄ (n(Mn₂O₃₎: n(NiMn₂O₄) = 0.35: 0.1) and has a porous microellipsoidal morphology. The microellipsoids are compose of numerous layered micro-/nanostructured blocks and the special porous microellipsoids structure of Ni_0.1Mn_0.9O_1.45 offers a large specific surface area for bacteria adhesion. The porous Ni_0.1Mn_0.9O_1.45 microellipsoids as anode electrocatalyst for MFCs exhibits excellent electrocatalytic activity to promote the extracellular electron transfer (EET) between the anode and bacteria, hence improves the performance of MFC. The MFC equipped with Ni_0.1Mn_0.9O_1.45/CF anode achieves a maximum power density of 1.39 ± 0.02 W m⁻², is significantly higher than that of commercial carbon felt anode. This work proposes a new method for the synthesis of high-performance and environmentally friendly anode electrocatalyst for MFCs.

通过简单的共沉淀反应在空气中微乳化和煅烧方法成功地合成了新型多孔自组装微/纳米结构Ni _0.1 Mn _0.9 O _1.45微椭球体的双组分复合材料，作为微生物燃料电池（MFCs）的高性能阳极电催化剂。气氛。形貌和结构表征表明，制成的Ni _0.1 Mn _0.9 O _1.45产物由Mn ₂ O ₃和NiMn ₂ O ₄（n（Mn ₂ O _3）：n（NiMn ₂O ₄）= 0.35：0.1），并且具有多孔的微椭圆形形态。微椭球体由许多层状的微/纳米结构块组成，Ni _0.1 Mn _0.9 O _1.45的特殊多孔微椭球体结构为细菌粘附提供了较大的比表面积。多孔Ni _0.1 Mn _0.9 O _1.45微椭球体作为MFCs的阳极电催化剂表现出优异的电催化活性，可促进阳极与细菌之间的细胞外电子转移（EET），从而提高了MFC的性能。配备Ni _0.1 Mn _0.9 O _1.45的MFC/ CF阳极达到1.39±0.02 W m ^-2的最大功率密度，明显高于商用碳毡阳极。这项工作提出了一种新的方法来合成MFCs的高性能和环境友好型阳极电催化剂。