APPLICATION OF ATOMIC LAYER DEPOSITION IN LI-ION BATTERIES

Li-ion batteries (LIBs) are widely used as portable power sources. The development of new electrode materials for LIBs is an important challenge for material science. The application of modern methods and approaches can facilitate the implementation of this task. One of the new methods which can be used for improvement of Li-ion batteries is an atomic layer deposition (ALD). The method is based of conducting of self-terminating reactions between functional surface groups of solids and low molecular precursors. The thickness of deposited film can be set by number of treatment cycles. In present work we describe the examples of ALD application for the improvement of lithium-ion batteries. In particular, the capacity retention of positive electrodes comprising LiCoO2 and Li1.25Ni0.13Co0.13Mn0.54O2 has been improved after deposition of thin (1-3 nm) alumina films. The application of ALD for deposition of thin films which can be used in lithium solid state 3D batteries is shown. Thin (80 nm) films of SnO2 showed high specific capacity (850-900 mA x h/g) stable during 400 cycles at 1C discharge current density.