In order to avoid the influence of PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC on the battery results, only the positive electrode plate charged to 4.45V (vs Li+/Li) is encapsulated with the electrolyte. The gas generation phenomenon in the storage process at high temperature (60 or 85℃) was analyzed by measuring the volume change of the soft pack cell. The EC: DMC: EMC=30:30:40 solution of 1M LiPF6 electrolyte was used.
High temperature storage gas production of three PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC removal cathode LiCoO2, LiNi0.5Co0.2Mn0.3O2 and LiNi0.85Co0.12Al0.03O2 was analyzed. At the same time, in order to verify the influence of impurities such as LiOH and Li2CO3 on gas production, 0.03g of Li2CO3 or LiOH were added into 0.5g electrolyte respectively, and aluminum plastic film was used for encapsulation.
The volume change of aluminum-plastic film bags using LCO, NCM and NCA materials during storage at 60℃ shows that Ni-based materials NCM and NCA produce more gas at the initial stage, but the gas production rate decreases significantly with the increase of storage time. PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC iron removal LCO, on the contrary, in the initial storage of little gas production, but with the increase of storage time, gas production continues to increase.
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