Silver effect of Co-Ni composite material on energy storage and structural behavior for Li-ion batteries

摘要

Ag powder has been comparatively applied to the Co-Ni materials preparing by mixing method and the prepared electrodes were used as negative electrodes for Li-ion batteries applications. The prepared Co-Ni and Ag-Co-Ni with 10wt.% of Ag composite electrodes are characterized by XRD, FE-SEM with EDX, impedance and electrochemical charge-discharge studies. These electrochemical studies are demonstrated at current rates of 0.1 C and 0.5 C between 0.01 and 2.0 V vs. Li/Li~+. The porous Co-Ni and Ag-Co-Ni composite materials are electrochemically tested in lithium half cells. The porous Ag-Co-Ni composite material demonstrates that the initial and end of discharge capacity up to 20th cycles is, respectively, 860 and 715 mAh g~(-1) at 0.1 C rate maintaining at approximately 83%. The porous Ag-Co-Ni composite electrode may be a good candidate for high power lithium-ion batteries.