Design and Performances of Three-Dimensional Lithium-Ion Battery

High-power and high-energy densities of lithium ion batteries are required, whereas there has been much less progress in the improvement of the conventional lithium ion batteries.  Three-dimensional (3D) concept of batteries has been suggested to improve performances of batteries. A number of 3D architectures, such as 3D interdigitated rods, 3D interdigitated plates, concentric tube, and 3D aperiodic sponge structures, have been proposed in order to increase the areal energy density [1]. The 3D cells showed higher energy and power compared to the conventional structure of cells; however, their energy was limited due to the limitation of the manufacturing process.[2]

In this paper, the novel design and the performances of 3D lithium ion battery were suggested. First, the 3D trench cathode structure was rendered without a conducting agent or a binder. The cathode has an internal current collector for the electronic conduction and was controlled as a thick-film. Lipon and Li metal were applied as the electrolyte and the anode, respectively. Expansion buffers were located in the anode to stable the cell structure under the anode expansion during the charge. The design of the 3D cell increased the energy density considerably, depending on the dimension of the electrode.

References

[1] Stefania Ferrari et al, J. Power Sources, 286 (2015) 25-46

[1] Matthew Roberts et al, J. Mater. Chem, 21 (2011) 9876-90