Facile Synthesis of Hierarchical Hollow CoP@C Composites with Superior Performance for Sodium and Potassium Storage

Authors

Qiannan Liu, University of WollongongFollow
Zhe Hu, University of WollongongFollow
Yaru Liang
Lin Li
Chao Zou
Huile Jin
Shun Wang
Huanming Lu
Qinfen Gu
Shulei Chou, University of WollongongFollow
Yong Liu, Central South University
Shi Xue Dou, University of WollongongFollow

RIS ID

142338

Publication Details

Liu, Q., Hu, Z., Liang, Y., Li, L., Zou, C., Jin, H., Wang, S., Lu, H., Gu, Q., Chou, S., Liu, Y. & Dou, S. (2020). Facile Synthesis of Hierarchical Hollow CoP@C Composites with Superior Performance for Sodium and Potassium Storage. Angewandte Chemie - International Edition, 59 (13), 5159-5164.

Abstract

© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Hierarchical hollow CoP and carbon composites were obtained through a facile synthetic method, where carbonization and phosphorization of the precursor were completed within one single step. The composites are composed of hollow CoP@C spheres, which are further made up of CoP nanoparticles with a thin outer carbon layer. Electrochemical performances of the prepared CoP@C composites as anodes for sodium and potassium storage were evaluated and compared. In situ TEM, in situ synchrotron XRD, and DFT calculations were conducted to study the structural evolution and the interaction between Na/K and CoP during cycling processes. Benefiting from the synergistic effect of conductive carbon layer and hierarchical hollow structure, the as-prepared CoP@C composites demonstrate superior sodium and potassium storage capability as anode materials for rechargeable batteries.