Author(s): Zhang, JY (Zhang, Junying); Ma, PP (Ma, Peipei); Hou, ZL (Hou, Zhiling); Zhang, XM (Zhang, Xiaoming); Li, CB (Li, Chuanbo)
Source: ENERGY & FUELS Volume: 34 Issue: 3 Pages: 3895-3900 DOI: 10.1021/acs.energyfuels.9b04242 Published: MAR 19 2020
Abstract: SiOx@graphene composite material was prepared by a one-step hydrothermal method and was used as a high-performance anode material for lithium-ion batteries. Graphene decoration on SiOx particles can help to improve the conductivity, relieve the volume effect thanks to the excellent mechanical property of graphene, and form a stable solid electrolyte interphase layer profit from the separation of SiOx particles from electrolyte. On the other hand, Li-oxide and Li-silicate can be generated due to the reaction of Li+ with Si and O elements during the process of Li+ intercalation and can accommodate the volume changes, which is beneficial for the cyclic performance. The corresponding SiOx@graphene composite electrode shows outstanding cyclic performance with high reversible specific capacity at the second cycle as 1541.3 mA h g(-1) and still maintains 1516.6 mA h g(-1) after 110 cycles with retention as high as 98.4%. The SiOx@graphene composite electrode also has an outstanding rate performance with a reversible specific capacity of more than 800 mA h g(-1) under a current density of 1 A g(-1). The method used in this work is simple, which is very promising in high-capacity lithium-ion battery field.
Accession Number: WOS:000526414800119
ISSN: 0887-0624
eISSN: 1520-5029
Full Text: https://pubs.acs.org/doi/10.1021/acs.energyfuels.9b04242