B-doped SiOx composite with three dimensional conductive network for high performance lithium-ion battery anode

Currently, the practical application of SiO x 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 SiO x composite by adhering SiO x particles with MWCNT (multi-walled carbon nanotube) under the assistance of lithium metaborate (LiBO 2 ). LiBO 2 , as a sintering aid, not only can react with SiO x to form a compacted framework, but also build a three-dimensional (3D) conductive network for ions transportation. Furthermore, B-SiO x @CNT@LBO 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.