J. Mater. Sci. Technol. ›› 2020, Vol. 55: 203-211.DOI: 10.1016/j.jmst.2019.08.013

• Research Article • Previous Articles     Next Articles

Hollow Co2P/Co-carbon-based hybrids for lithium storage with improved pseudocapacitance and water oxidation anodes

Lei Hua, Fuxin Wangc,*(), M.-Sadeeq Balogunb,* (Jie Tang)(), Yexiang Tonga,*()   

  1. a MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
    b College of Materials Science and Engineering, Hunan University, Changsha 410082, Hunan, China
    c School of Applied Physics and Materials, Wuyi University, Jiangmen 529020, China
  • Received:2019-05-23 Accepted:2019-08-22 Published:2020-10-15 Online:2020-10-27
  • Contact: Fuxin Wang,M.-Sadeeq Balogun,Yexiang Tong


A porous hollow hybrid nanoarchitecture that consist of Co2P/Co nanoparticles confined in nitrogen-doped carbon (NC) and carbon nanotube (CNT) hollow nanocubes (denoted as H-Co2P/Co-NC/CNT) has been rational designed as anode for lithium ion batteries (LIBs) and electrocatalytic oxygen evolution reaction (OER). Such design involves simple synthetic process of using metal-organic frameworks (MOFs) as sacrificial precursor. The uniform cubic-shaped H-Co2P/Co-NC/CNT hybrid is investigated with several intriguing advantages, including improved structural integrity, superior electronic conductivity, hollow architecture and large specific surface area and so on. The as-synthesized H-Co2P/Co-NC/CNT displays excellent lithium storage behaviour in terms of long cycle life (> 500 cycles), remarkable rate performance (up to 5 A g-1), high reversible capacity (601 mA h g-1 at 0.2 A g-1) and high pseudocapacitance behavior. Besides, it also delivers a superior catalytic property for OER with a small Tafel slope of 45.3 mV dec-1 and overpotential of 256 mV (at 10 mA cm-2). The excellent performance can be attributed to the synergistic effect between Co2P/Co and NC/CNT, leading to enhanced conductivity through high pseudocapacitance contribution. This present work demonstrates that MOF-derived H-Co2P/Co-NC/CNT hybrid is a promising candidate for high-performance multifunctional energy systems.

Key words: Co-based hybrid, Carbon-based hybrid, Hollow morphology, Lithium ion battery, Oxygen evolution reaction