3D Printing of Graphite Electrode for Lithium‐Ion Battery with High Areal Capacity

Abstract

Combined with the traditional preparation method of graphite anode slurry for lithium battery and the manufacturing technology of pneumatic jet, the organic solvent‐based anode slurry is selected to explore the viscosity curve under different solid–liquid ratios. It is judged that the anode slurry is a non‐Newtonian fluid. It has printability and meets the requirements of direct writing molding technology. The slurry with a solid volume fraction of 50% is selected as the printing material, the graphite anode slurry is molded on the copper foil by a pneumatic printing device and the electrochemical performance of the coin lithium‐ion battery is analyzed. The effect of printing structure and printing interval on the electrochemical performance of lithium‐ion batteries is studied and compared with batteries prepared by traditional coating processes. Finally, the linear electrode pattern is selected to discuss the effect of printing layers on the electrochemical performance of lithium‐ion batteries. The results show that the areal specific capacity of the printed electrode is significantly higher than that of the traditional coated electrode and the shape, interval, and the number of layers of the printing electrode have a significant effect on the performance of the battery.

Last developments in polymers for wearable energy storage devices

“…Regarding the electrodes, on the one hand Zhang et al reported a method to obtain LDM printed ones with commercial graphite slurry 81 . They obtained remarkable capacity values in comparison with traditional electrodes used in LIB.…”

“…A huge amount of the 3D-printed LIB electrolytes 91,92 and electrodes 81 were obtained by LDM process, also known as direct ink writing. 93,94 The LDM method involves a syringe which prints the fed ink by a pneumatic system (Figure 5A).…”

Additive manufacturing for advanced rechargeable lithium batteries: A mini review

“…For cathode materials, some widely used cathode materials have been successfully applied for 3D printed lithium batteries including lithium cobalt oxides (LiCoO 2 ) (Kohlmeyer et al, 2016), lithium manganese oxides (LiMn 2 O 4 ) (Li et al, 2017), lithium transition-metal phosphates (LiMn 1-x Fe x PO 4 ) (Hu et al, 2016), etc., as well as other materials with higher capacities involving carbon materials (graphite and graphene) (Mensing et al, 2020;Zhang et al, 2021), silicon materials (Beydaghi et al, 2021), and quantum dots (Zhang et al, 2018b). For anode materials, some conductive frameworks such as carbon and 2D MXenes (Ti 3 C 2 T x ) can severe as current collectors for hosting Li (Wei et al, 2021).…”

Preparation and Improvement of Electrochemical Performance of LiNi0.5Mn1.5O4 Cathode Materials In Situ Coated with AlPO4

“…The traditional coating method is to disperse the prepared AlPO 4 particles in water to form a dispersion and then add the cathode material particles to the above dispersion so that the AlPO 4 particles are adsorbed on the surface of the LiNi 0.5 Mn 1.5 O 4 particles through adsorptive action, and heat treatment is carried out after evaporation of water to form a cathode active material with AlPO 4 particles on the surface. − However, because AlPO 4 is insoluble in water, AlPO 4 particles are easy to agglomerate in water and difficult to disperse. − Moreover, when a large number of cathode material particles are added to the AlPO 4 dispersion, local cathode material particles will adsorb a large amount of AlPO 4 , while some cathode material particles may not adsorb enough AlPO 4 . , Therefore, the method is difficult to form a uniform AlPO 4 coating on the surface of the electrode, so it is difficult to achieve the purpose of better improving material properties. Considering the above-mentioned facts, the LiNi 0.5 Mn 1.5 O 4 /AlPO 4 composites were synthesized by an in situ coating method in this paper.…”