Research on high density and safety LiCoO_2 as cathode materials for lithium ion batteries

1IntroductionLithiumion batteries are largely adopted for potable electronic devices due to its high capacity,highvoltage and good safety attributes.The advancement of lithiumbattery requires newtype of cathode mate-rials with high energy density,as well as good safety and lowcost.Accordingly the cathode materials arebeing developedin two directions[1].One wayis toincrease the gravi metric capacity of the materials,e.g.by preparing Li Ni1-yCoyO2with higher capacity but poor thermal stability…

Research on high density and safety LiCoO_2 as cathode materials for lithium ion batteries

Three LiCoO_2 samples of different specifications were synthesized using different Co_3O_4s as starting material, and characterized in physical, electrochemical and safety properties. There demonstrates clear dependence of LiCoO_2 on Co_3O_4 in particle size and density. The main difference among the three LiCoO_2 samples lies in physical, rate capability and safety properties, the sample with larger particle size, higher density (accordingly smaller surface area) demonstrates better safety but lower rate capability, while there is little difference among them in terms of capacity and cycling stability despite of the variation in physical properties.