Currently, electric vehicles and other applications for large-capacity lithium-ion rechargeable batteries commonly used * 3 elements: lithium cobalt oxide (LiCoO2) lithium manganese oxide (LiMn2O4) or lithium iron phosphate (LiFePO4), the cathode with graphite anode (Note 3). The future direction of development may be followed by higher energy density, better security and lower material costs and other factors of the three key guidelines.
Candidate cathode materials selection issues involved with different anode materials. Compared with the anode material, do not have any new candidate for high-capacity cathode material. Look, unless as a lithium-ion rechargeable battery after (such as lithium or lithium sulfur battery gas) and sulfur, air or other material, the energy did not increase. After the lithium-ion rechargeable battery type is faced with many outstanding issues still need time to consider commercial applications. Therefore, the current focus on the development of cathode materials improves the battery voltage to obtain higher output.
Industry has no shortage of candidates for high capacity anode material, but they charge / discharge when the over-expansion and contraction, causing substantial disintegration, and too short charge / discharge cycle life.
In addition, the design is now used by nearly all opposed to the graphite has a low potential of lithium may cause lithium deposited on the surface of the graphite electrode and electrolyte decomposition.
Improved (second generation) lithium-ion rechargeable battery may be combined to support higher North Korea to improve the output voltage cathode materials, and can provide better security of energy and anode materials development, have the potential range (potential window) , which is able to withstand High voltage fire resistant electrolyte must also be developed.