High performance Si/MgO/graphite composite as the anode for lithium-ion batteries |
| |
Authors: | Wenchao Zhou Shailesh Upreti M. Stanley Whittingham |
| |
Affiliation: | aChemistry and Materials, State University of New York, Binghamton, New York 13902-6000, USA |
| |
Abstract: | The Si/MgO/graphite composite was synthesized by high energy ball-milling and evaluated as a durable anode for lithium-ion batteries. EDX mapping indicated that Si was dispersed homogeneously in the MgO matrix. The composite delivered an initial capacity of ~ 700 mAh/g and maintained a capacity of 630 mAh/g after 74 cycles at 0.5 mA/cm2; even at 8 mA/cm2 it delivered more than 85% of its capacity. Its volumetric capacity is double that of carbon. The coulombic efficiency climbed from 77% in the first cycle to above 99.5% after 20 cycles, and retained that value. |
| |
Keywords: | Lithium battery Anode |
本文献已被 ScienceDirect 等数据库收录! |