In Situ Synthesis of Multilayer Carbon Matrix Decorated with Copper Particles: Enhancing the Performance of Si as Anode for Li-Ion Batteries

• DOI: 10.1021/acsnano.8b08088
• Publication Date: 2019-03-05T21:27:08Z
• Authors: Hui Zhang; Ping Zong; Mi Chen; Hong Jin; Yu Bai; Shiwei Li; Fei Ma; Hui Xu; Kun Lian
• Keywords: Carbon fibers

A 3D structured composite was designed to improve the conductivity and ease volume problems of Si anode during cycling for lithium-ions batteries. An in situ method via a controllable gelation process explored fabricate multilayer carbon matrix toughened by cross-linked nanotubes (CNTs) decorated with conductive Cu agents. Structurally, bifunctional shell formed on surface but alleviate side reactions. particles as conducting agents are also used further conductivity. The issue can be effectively released toughening through multilayered structure CNTs. Moreover, might prevent silicon from agglomeration. Consequently, Si@C@Cu is expected exhibit benign electrochemical performances commendable capacity 1500 mAh g-1 (900 cycles, 1 g-1) high rate performance (1035 g-1, 4 g-1). DLi+ ranging 10-11 10-9 cm-2 s-1 obtained GITT test, which higher than most reported data.