Evaluate different properties of lithium-ion batteries in different materials. Review recent materials in collectors and electrolytes. Lithium-ion batteries are one of the most popular energy storage systems today, for their high-power density, low self-discharge rate and absence of memory effects.
The energy density of the traditional lithium-ion battery technology is now close to the bottleneck, and there is limited room for further optimization. Now scientists are working on designing new types of batteries with high energy storage and long life span. In the automotive industry, the battery ultimately determines the life of vehicles.
It is concluded that the room for further enhancement of the energy density of lithium-ion batteries is very limited merely on the basis of the current cathode and anode materials. Therefore, an integrated battery system may be a promising future for the power battery system to handle the mileage anxiety and fast charging problem.
1. Introduction Lithium-ion batteries (LIBs) have changed our daily life significantly by allowing us to carry along our cell phones, laptops and power tools. They aim to revolutionize the transportation industry with electric cars and devices to store renewable energy from solar and wind [1, 2].
There is great interest in exploring advanced rechargeable lithium batteries with desirable energy and power capabilities for applications in portable electronics, smart grids, and electric vehicles. In practice, high-capacity and low-cost electrode materials play an important role in sustaining the progresses in lithium-ion batteries.
A Li-ion battery consists of a intercalated lithium compound cathode (typically lithium cobalt oxide, LiCoO 2) and a carbon-based anode (typically graphite), as seen in Figure 2A. Usually the active electrode materials are coated on one side of a current collecting foil.