Template-free synthesis of multifunctional Co3O4 nanotubes as excellent performance electrode materials for superior energy storage

作者：Jixing Wang; Cheng Wang; Mengmeng Zhen

来源：Chemical Engineering Journal, 2018, 356: 1-10.

DOI：https://doi.org/10.1016/j.cej.2018.09.014

• Template-free
• CO3O4 nanotubes
• Mesoporous
• Li metal batteries

Herein, multifunctional Co3O4 nanotubes (Co3O4-T) are successfully constructed via a low-cost and template-free route, which show a tubular structure with mesoporous and hollow interior. The as-prepared Co3O4-T exhibit superior cycling performances, rate capabilities and strong cycling stability when used as the electrode materials in lithium-ion batteries CLIBs) and lithium-sulfur batteries (LSBs). The Co3O4-T electrode delivers a high specific capacity of-1081 mAh g~(-1) at a current density of 100mAh g~(-1) after 50 cycles in UBs, Besides, it also shows a high initial discharge capacity of 1049.3 mAh g~(-1) and low overpotential of 154 mV at 0.2 C in LSBs. These excellent electrochemical performances of Co3O4-T electrode are attributed to the unique tubular structure with small-sized mesoporous, which facilitates Li+ diffusion and enhances structural robustness.