Preparation of LiNi0.8Co0.1Mn0.1O2 electrodes by 3D printing

The LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM) electrodes are successfully prepared by 3D gel printing (3DGP) technique in this study. The results show that when the slurry with 45 % solid content was squeezed out of the needle, the viscosity of the printing slurry was 1.54 Pa s at the shear rate of 660 s −1 , which shows that the printing slurries are suitable for 3DGP. At the same time, when the inner diameter of the printing needle is 0.25 mm, the air pressure is 0.40 MPa and the printing speed is 4.60 mm s −1 , the structure of printing electrode is complete. The electrochemical measurement results show the printed NCM electrode with 231 μm printing line spacing has a higher capacity of 169.80 mAh g −1  at 4C, a specific capacity of 103.9 mAh g −1  at 1C after 500 cycles and an energy density of 232 Wh kg −1 , which shows that the high specific capacity and good cycling stability exhibited by NCM electrodes fabricated by 3DGP.