Red Phosphorus-Embedded Cross-Link-Structural Carbon Films as Flexible Anodes for Highly Reversible Li-Ion Storage

3 years ago

Red Phosphorus-Embedded Cross-Link-Structural Carbon Films as Flexible Anodes for Highly Reversible Li-Ion Storage

Tao Yuan, Shiyou Zheng, Xuanxuan Bi, Jiafeng Ruan, Junhe Yang, Yuepeng Pang, Cheng Zhong, Zi-Feng Ma, Wenbin Hu, Xinbo Xu

Red phosphorus (P) is considered to be one of the most attractive anodic materials for lithium-ion batteries (LIBs) due to its high theoretical capacity of 2596 mAh g^–1. However, intrinsic characteristics such as the poor electronic conductivity and large volume expansion at lithiation impede the development of red P. Here, we design a new strategy to embed red P particles into a cross-link-structural carbon film (P–C film), in order to improve the electronic conductivity and accommodate the volume expansion. The red P/carbon film is synthesized via vapor phase polymerization (VPP) followed by the pyrolysis process, working as a flexible binder-free anode for LIBs. High cycle stability and good rate capability are achieved by the P–C film anode. With 21% P content in the film, it displays a capacity of 903 mAh g^–1 after 640 cycles at a current density of 100 mA g^–1 and a capacity of 460 mAh g^–1 after 1000 cycles at 2.0 A g^–1. Additionally, the Coulombic efficiency reaches almost 100% for each cycle. The superior properties of the P–C films together with their facile fabrication make this material attractive for further flexible and high energy density LIB applications.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b12556

DOI: 10.1021/acsami.7b12556