B-doped SiOx composite with three dimensional conductive network for high performance lithium-ion battery anode
Wenjie He, Tengfei Zhang, Zhiwei Li, Jiangmin Jiang, Chenglong Chen, Nan Liu, Hui Dou, Xiao Gang Zhang
Abstract
Currently, the practical application of SiOx still has a huge hindrance in the area of lithium ion battery, because it is unable to achieve an effective contact with surrounding conducting materials, resulting in failure to form lithium ion migration tunnels. In this work, we presented a facile method to synthesize the B-doped SiOx composite by adhering SiOx particles with MWCNT (multi-walled carbon nanotube) under the assistance of lithium metaborate (LiBO2). LiBO2, as a sintering aid, not only can react with SiOx to form a compacted framework, but also build a three-dimensional (3D) conductive network for ions transportation. Furthermore, B-SiOx@[email protected] anode delivers a remarkable lithium storage performance in terms of long cycles and high rate capability. A full cell coupled with NCM622 cathode achieves a high energy density of 429.5 Wh kg−1 based on the total mass of cathode.