An effective three-dimensional ordered mesoporous ZnCo2O4 as electrocatalyst for Li-O-2 batteries

作者：Li Pengfa; Sun Wang^*; Yu Qilin; Guan Mengjie; Qiao Jinshuo; Wang Zhenhua; Rooney David; Sun Kening

来源：Materials Letters, 2015, 158: 84-87.

DOI：10.1016/j.matlet.2015.06.006

• Lithium-oxygen battery
• Metallic composites
• Electrocatalyst
• Structural

Three-dimensional ordered mesoporous (3DOM) ZnCo2O4 materials have been synthesized via a hard template and used as bifunctional electrocatalysts for rechargeable Li-O-2 batteries. The as-prepared ZnCo2O4 nanoparticles possess a high specific surface area of 127.2 m(2) g(-1) and a spinel crystalline structure. The Li-O2 battery utilizing 3DOM ZnCo2O4 shows a higher specific capacity of 6024 mAh g(-1) than that with pure Ketjen black (KB). Moreover, the ZnCo2O4-based electrode enables much enhanced cyclability with a smaller discharge-recharge voltage gap than that of the carbon-only cathode. Such excellent catalytic performance of ZnCo2O4 could be associated with its larger surface area and 3D ordered mesoporous structure.

• 出版日期2015-11-1
• 单位北京理工大学