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

Qiannan Liu; Zhe Hu; Yaru Liang; Lin Li; Chao Zou; Huile Jin; Shun Wang; Huanming Lu; Qinfen Gu; Shu-Lei Chou; Yong Liu; Shi-Xue Dou

doi:10.1002/anie.201913683

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

Angew Chem Int Ed Engl. 2020 Mar 23;59(13):5159-5164. doi: 10.1002/anie.201913683. Epub 2020 Feb 25.

Authors

Qiannan Liu^{1

2}, Zhe Hu², Yaru Liang^{3

4}, Lin Li⁵, Chao Zou¹, Huile Jin¹, Shun Wang¹, Huanming Lu³, Qinfen Gu⁶, Shu-Lei Chou², Yong Liu⁷, Shi-Xue Dou²

Affiliations

¹ College of Chemistry and Materials Engineering, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang, 325027, China.
² Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Innovation Campus, Squires Way, North Wollongong, NSW, 2522, Australia.
³ Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.
⁴ State Key Laboratory of Powder Metallurgy, Powder Metallurgy Research Institute, Central South University, Changsha, Hunan, 410083, China.
⁵ Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Centre of Chemical Science and Engineering, College of Chemistry, Nankai University, Tianjin, 300071, China.
⁶ Australian Synchrotron, 800 Blackburn Road, Clayton, VIC, 3168, Australia.
⁷ School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, 270 Xueyuanxi Road, Wenzhou, 325027, China.

PMID: 31849145
DOI: 10.1002/anie.201913683

Abstract

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.

Keywords: CoP@C composites; hierarchical hollow structures; potassium storage; sodium storage.

Grants and funding

Australian Renewable Energy Agency