Structural design and modification are effective measures to improve the lithium storage performance of electrode materials. Herein, three‐dimensional (3D) porous Co‐doped MnO/nitrogen‐doped reduced graphene oxide aerogels (Co−MnO/NG‐G) have been prepared by successive self‐assembly processes, including the self‐assembly nucleation of Co−MnO on GO in H₂O/N,N‐Dimethylformamide (DMF) mixed solvent, and the 3D reduction‐assembly of hydrogels accompanied with nucleation‐inducing growth of Co−MnO nanocrystals. Due to high‐efficient electron/ion transport channels dating from the novel 3D porous microstructure and improved electron/ion conductivity deriving from doping MnO with Co, the 3D Co−MnO/NG‐G electrode demonstrates high pseudocapacitive lithium storage behavior with 88.3 % at 2 mV s⁻¹. As an anode in lithium‐ion battery, the 3D Co−MnO/NG‐G shows a high capacity of 982.8 mAh g⁻¹ at 0.5 A g⁻¹ after 100 cycles, outstanding rate capability with 424.0 mAh g⁻¹ at 8 A g⁻¹, as well as superior cycle stability with 508.9 mAh g⁻¹ after 800 cycles at 4 A g⁻¹. This work demonstrates that the synergistic strategy between cation doping and 3D porous channels for electron/ion transport is an effective way to design high‐rate anode materials.

中文翻译：

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三维钴掺杂的MnO /氮掺杂的还原氧化石墨烯气凝胶中的伪电容锂存储作为高档阳极材料

结构设计和改进是提高电极材料储锂性能的有效措施。在此，通过连续的自组装过程，包括Co-MnO的自组装成核，制备了三维（3D）多孔共掺杂MnO /氮掺杂还原氧化石墨烯气凝胶（Co-MnO / NG-G）。在H ₂ O / N，N-二甲基甲酰胺（DMF）混合溶剂中的GO上，以及水凝胶的3D还原组装并伴随成核诱导Co-MnO纳米晶体的生长。由于源自新颖的3D多孔微结构的高效电子/离子传输通道以及掺杂Co的MnO产生的改善的电子/离子电导率，因此3D Co-MnO / NG-G电极表现出较高的假电容锂存储行为，在88.3％处2 mV s ^-1。3D Co-MnO / NG-G作为锂离子电池的阳极，经过100次循环后，在0.5 A g ^-1下显示982.8 mAh g ^-1的高容量，出色的速率能力在8 A下为424.0 mAh g ^-1 g ^-1，以及在4 A g ^-1下800次循环后具有508.9 mAh g ^-1的优异循环稳定性。这项工作表明，阳离子掺杂和3D多孔通道之间的电子/离子迁移协同策略是设计高速率阳极材料的有效方法。