The ternary component NiCoAl-layered double hydroxide (NiCoAl-LDH) and carbon nanotube (CNT) nano-composite (CNT/NiCoAl-LDH) were successfully prepared by a simple hydrothermal method. The NiCoAl-LDH nanosheets were effectively and uniformly grown on CNTs, forming a cross-linked conductive network structure, and stainless steel (SS) mesh was used as the base to load CNT/NiCoAl-LDH for microbial fuel cell (MFC) cathode. X-ray diffraction (XRD) results presented that the CNT/NiCoAl-LDH hybrid exhibited the (003), (006), (012), (015), (018), (110) and (113) crystal planes of hydrotalcite reflection. The surface functional groups C-O, C=O, C-H, C-N and M-O of the hybrid were confirmed. The cross-linked network structure of the hybrid was observed and the content and proportion of each element of the hybrid were found. CNT/NiCoAl-LDH showed excellent catalytic oxygen reduction reaction (ORR) ability by cyclic voltammetry (CV) and linear voltammetry (LSV) due to its abundant electrochemical active sites and excellent conductivity. The maximum output voltage of CNT/NiCoAl-LDH catalyst as MFC cathode was 450 mV, the maximum power density was 433.5 ± 14.8 mW/m², and the maximum voltage stabilization time was 7–8 d. The results indicated that the CNT/NiCoAl-LDH hybrid was full potential as a high-performance, low-cost MFC cathode catalyst in future.

采用简单的水热法成功制备了三元组份NiCoAl层状双氢氧化物（NiCoAl-LDH）和碳纳米管（CNT）纳米复合材料（CNT/NiCoAl-LDH）。NiCoAl-LDH 纳米片有效且均匀地生长在 CNT 上，形成交联的导电网络结构，并以不锈钢（SS）网为基础负载 CNT/NiCoAl-LDH 用于微生物燃料电池（MFC）阴极。X射线衍射（XRD）结果表明，CNT/NiCoAl-LDH杂化物表现出水滑石的（003）、（006）、（012）、（015）、（018）、（110）和（113）晶面反射。确认了杂化物的表面官能团CO、C=O、CH、CN和MO。观察杂种的交联网络结构，求出杂种各元素的含量和比例。由于其丰富的电化学活性位点和优异的导电性，CNT/NiCoAl-LDH 通过循环伏安法 (CV) 和线性伏安法 (LSV) 显示出优异的催化氧还原反应 (ORR) 能力。CNT/NiCoAl-LDH催化剂作为MFC阴极的最大输出电压为450 mV，最大功率密度为433.5 ± 14.8 mW/m²，最大电压稳定时间为7-8 d。结果表明，CNT/NiCoAl-LDH 混合体在未来作为高性能、低成本的 MFC 阴极催化剂具有充分的潜力。