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http://dx.doi.org/10.9713/kcer.2020.58.1.52

Effect of MgF2 Surface Modification for LiNi0.8Co0.15Al0.05O2 Cathode Material on Improving Electrochemical Characteristics  

Jin, Su-Jin (Department of Chemical Engineering, Chungbuk National University)
Seo, Jin-Seong (Department of Chemical Engineering, Chungbuk National University)
Na, Byung-Ki (Department of Chemical Engineering, Chungbuk National University)
Publication Information
Korean Chemical Engineering Research / v.58, no.1, 2020 , pp. 52-58 More about this Journal
Abstract
Electrochemical characterization and thermal stability were investigated for MgF2 coated LiNi0.8Co0.15Al0.05O2 cathode. The ratio of MgF2 was controlled by 0.5, 1, 3 wt%. Cyclic voltammetry, charge-discharge profiles, rate capability, cycle life were measured for electrochemical properties. DSC analysis was measured for thermal stability. The first discharge capacities of MgF2 coated LiNi0.8Co0.15Al0.05O2 were decreased at 0.1C-rate compared to pristine LiNi0.8Co0.15Al0.05O2. But the rate capability and cycle life of MgF2 coated LiNi0.8Co0.15Al0.05O2 were improved at 2C-rate. In DSC analysis result, the exothermic temperature of MgF2 coated LiNi0.8Co0.15Al0.05O2 was increased and peak height was decreased.
Keywords
Lithium secondary battery; Cathode material; $LiNi_{0.8}Co_{0.15}Al_{0.05}O_2$; $MgF_2$ coating; Thermal stability;
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