Structuring Al3+-doped LiNi1∕3Co1∕3Mn1∕3O2 by 3D-birdnest-shaped MnO2

The successfully prepared 3D-birdnest-shaped MnO2 had a hollow structure and a large amount of free space among nanotubes, which was more favorable for other substances to attach on it. Due to its special structure, we prepared the LiNi1∕3Co1∕3−xMn1∕3AlxO2 (x=0.00, 0.01, 0.03, 0.05, 0.08) in a simple way by employing 3D-birdnest-shaped MnO2, and revealed the influence of Al3+-doped in LiNi1∕3Co1∕3Mn1∕3O2. And the sample of LiNi1∕3Co1∕3Mn1∕3O2 had outstanding electrochemical properties; when a small amount of Al3+ (x=0.05) was doped into the material, the cyclic performance of the material was improved significantly (90.9% capacity retention after 100 cycle), and the capacity of the LiNi1∕3Co1∕3−xMn1∕3AlxO2 reached 186.2mAhg−1. Our results provided the underlying insights needed to guide the design of cathode materials.