Abstract
Lithium iron (ferrium) phosphate (LFP) use iron as a transition metal, so there is lower resource risk. And because of tolerant to overcharging, they have excellent safety and durability. Lithium-ion secondary batteries using LFP have become widely used as main power sources for EVs and ESSs in recent years. Originally, LFP has higher bulk resistance than other layered rock salt-based positive materials, so that carbon-coating was applied to surface of LFP particles. This idea was extremely effective in putting LFP into practical use. However, the use of the carbon coat has led disadvantage of high cost despite the use of cheaper iron because the manufacturing process increases. We report that we have developed LFP that has extremely high-rate charge and discharge performance even though it does not have carbon coating. Figure 1
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