Controllable assembly of nitrogen-doped mesoporous carbon with different pore structures onto CNTs for excellent lithium storage

Mesoporous carbon nanomaterials have shown a great application potential in energy storage and conversion fields due to their outstanding conductivity, tunable pore structure, good chemical stability. Nevertheless, how accurately control the especially directly assembling mesoporous onto different substrates remains big challenge. Herein, we successfully assembled two kinds of highly nitrogen-doped nanotubes (NMC/CNTs) based on facile cooperative assembly process assisted by triblock PEO20PPO70PEO20 (P123) PEO106PPO70PEO106 (F127) copolymers. The experimental results indicate that P123/F127 mass ratio has profound effect leading formation NMC/CNTs composites with spherical structure (S-NMC/CNTs) cylindrical (C-NMC/CNTs). In virtue fast electron/ion transfer kinetics, as-prepared S-NMC/CNTs anode demonstrates an excellent electrochemical performance for lithium-ion batteries, it delivers high reversible capacity 588.1 mAh·g−1 at current 0.1 A·g−1 after 100 cycles, along superior cycling Specifically noted, controlled route developed our work can also be applied other support materials structures compositions.