Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6604106 | Electrochimica Acta | 2018 | 6 Pages |
Abstract
Ag@LiFePO4 cathode materials have been prepared successfully by performing solid-state reactions between AgNO3 and the ascorbic acid in the presence of LiFePO4 powders at ambient temperature. Metallic Ag nanoparticles of ca. 10â¯nm in diameter can be produced with the environmental benign approach and efficiently attached onto the surfaces of commercial LiFePO4 cathode materials. The as-prepared composites show highly enhanced electrochemical performances in storing Li with ca. 22% increase in their discharge specific capacity from 128 to 156â¯mAhgâ1 at C/10 rate, after loading Ag additive of 2â¯wt%. The coulombic efficiency of the composites can retain 97%, after cycling for 80 times. They can also remain up to 94â¯mAhgâ1 of their discharge specific capacity at high rate of 5â¯C, which is almost twice higher than that of LiFePO4 cathode materials.
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Authors
Erchao Meng, Miao Zhang, You Hu, Feilong Gong, Linsen Zhang, Feng Li,