Suffering from sluggish kinetics and unstable architectures, the unsatisfied rate capability and poor cycling stability of nickel-based cathode hindered the widespread utilization of Ni-Zn batteries in fields of energy storage. Herein, we introduce suitable Co content to the nickel–carbon composite electrode materials and prepare a nickel-based cathode with 3D network structure using a carbon framework derived from bamboo cellulose nanofibers to anchor cobalt-doped nickel/nickel oxides (denoted as Co-Ni/NiO@C). Due to interlaced networks and abundant nanoscale metal sites, the Co-Ni/NiO@C owns abilities of fast electrons/ions transfer and efficient reversible reaction, which displays a high specific capacity of 241 mAh/g and excellent rate performance (78.1% retention after 20-folder current increase). When the Co-Ni/NiO@C was used as the cathode for a Ni-Zn battery, the battery exhibited a specific capacity of 321 mAh/g and retained 77.8% retention after a 20-folder current increase, indicating its good rate capability. Moreover, the Co-Ni/NiO@C//Zn battery also delivers an outstanding cycling performance (94.2% retention after 2500 cycles). Therefore, this work broadens the way to develop superior performance electrode materials derived from biomass carbon resources for large scale energy storage systems.

镍基正极由于动力学缓慢和结构不稳定，倍率性能不理想和循环稳定性差，阻碍了镍锌电池在储能领域的广泛应用。在此，我们在镍碳复合电极材料中引入合适的 Co 含量，并使用源自竹纤维素纳米纤维的碳骨架来锚定钴掺杂的镍/镍氧化物（表示为 Co-Ni），制备具有 3D 网络结构的镍基正极/NiO@C)。由于交错网络和丰富的纳米级金属位点，Co-Ni/NiO@C 具有快速电子/离子转移和高效可逆反应的能力，显示出 241 mAh/g 的高比容量和优异的倍率性能（78.1% 保留）当前增加 20 个文件夹后）。当Co-Ni/NiO@C用作Ni-Zn电池的正极时，电池的比容量为321 mAh/g，电流增加20倍后仍保持77.8%的保留率，表明其具有良好的倍率性能. 此外，Co-Ni/NiO@C//Zn 电池还具有出色的循环性能（2500 次循环后保留率为 94.2%）。因此，这项工作拓宽了为大规模储能系统开发源自生物质碳资源的高性能电极材料的途径。