PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC test results showed that the precipitation reaction time increased from 20min to 1h2h3h4h, and the shell thickness increased from 200nm to 600nm800nm1000nm1200nm. The initial charge-discharge and cyclic performance analysis of the corresponding material shows that the specific capacity of the material decreases gradually with the increase of x, which is mainly the result of the gradual increase of the content of low-capacity component Li(Ni0.5mn0.5O2). When x > 0.2, the material cycle stability is very good, the capacity retention rate can reach more than 95% after 40 cycles.
Overall, the material with x = 0.2 has better electrochemical performance. Using Ni0.8Co0.15Al0.05(OH)2 as raw material, (Ni0.5Mn0.5)0.2(OH) 2-coated [(Ni0.8Co0.15Al0.05)0.8(Ni0.5Mn0.5)0.2](OH)2 was synthesized by coprecipitate method. Li[(Ni0.8Co0.15Al0.05)0.8(Ni0.5Mn0.5)0.2]O2 was obtained by mixing lithium. PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC was characterized by SEM as core-shell structure with shell thickness of about 1.2μm.
EIS, first charge-discharge curve, rate performance diagram, cycle performance diagram and DSC show that the MATERIAL has low impedance, stable cycle performance, high capacity retention rate and high thermal stability in the process of PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC cycle. These are closely related to the composition and structure of materials. The Li(Ni0.5Mn0.5)O2 in the shell inhibits the oxygen precipitation of the high Ni material in the nucleus during overcharging, stabilizes the structure of the material, and isolates the contact between the core and the electrolyte.
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