The electrification of transportation necessitates the growth of high-power-density lithium ion batteries. However, traditional graphite anodes in lithium ion batteries perform poorly especially when charged or discharged under high current density. In this work, we deposit nanoflake δ-MnO₂ on the carbon nanotubes-Graphene-Nickel foam compound matrix and apply it as a self-standing anode without binder or conductive agent. This composite buffers volume change, enables more electrochemical active sites, boosts the conductivity of electrode materials and facilitates lithium-ion diffusion. The resulting lithium ion batteries with the composite anodes show improved cycle life and enhanced rate performance, yielding a high specific capacity of 1250 mAh g⁻¹ for 350 cycles at 0.4 A g⁻¹ and 490 mAh g⁻¹ over 700 cycles at 4.0 A g⁻¹.

运输的电气化要求高功率密度锂离子电池的发展。但是，锂离子电池中的传统石墨阳极性能较差，尤其是在高电流密度下充电或放电时。在这项工作中，我们沉积纳米片δ-的MnO ₂在碳纳米管-石墨烯镍泡沫化合物基质，并将其应用为没有粘合剂或导电剂的自立阳极。这种复合材料可以缓冲体积变化，实现更多的电化学活性位，提高电极材料的电导率并促进锂离子扩散。所得的具有复合阳极的锂离子电池显示出更长的循环寿命和更高的倍率性能，在0.4 A g的电压下可在350次循环中产生1250 mAh g ^-1的高比容量^-1和490 mAh g ^-1在4.0 A g ^-1下经过700次循环。