Carbon Patterned Layer for the Low-Temperature Performance of Lithium-Ion Batteries

Abstract

Lithium-ion batteries (LIBs) are widely used as an energy source as the electrification of industries, due to their high energy density, long lifespan, and excellent cost-effectiveness. However, if the LIBs operated in environments that are not at an appropriate temperature, the electrochemical performance of the LIBs can be rapidly reduced and leading to a significant deterioration in cycling characteristics.In particular, at low-temperature environments, the diffusion, migration and charge transfer resistance can substantially increase. As a result, the capacity and rate capability of the lithium-ion battery are lower than that of the room temperature environments. To improve the performance of LIBs at the low-temperature, previous studies have been introduced a heat generation layer inside or outside batteries. However, adding a heat generation layer reduces the energy density of the system, and the layer inside the battery can act as an electrical resistance layer, leading to a decrease in performance at the room temperature.In this research, a patterned carbon layer was introduced at the interface between the current collector and the electrode composite layer to improve the low-temperature characteristics of LIBs. The patterning of the carbon layer not only reduces the decrease in energy density but also does not significantly limit the electron transfer path between the current collector and the electrode composite layer.