CoSe nanoparticles in-situ grown in 3D honeycomb carbon for high-performance lithium storage

T Zhang; Y F Yuan; B X Wang; G S Cai; P F Du; Y Z Huang; S Y Guo

doi:10.1016/j.jcis.2023.02.098

CoSe nanoparticles in-situ grown in 3D honeycomb carbon for high-performance lithium storage

J Colloid Interface Sci. 2023 Jun 15:640:52-60. doi: 10.1016/j.jcis.2023.02.098. Epub 2023 Feb 21.

Authors

T Zhang¹, Y F Yuan², B X Wang¹, G S Cai¹, P F Du³, Y Z Huang⁴, S Y Guo⁵

Affiliations

¹ College of Machinery Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.
² College of Machinery Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China; Changshan Research Institute, Zhejiang Sci-Tech University, Changshan 324299, China; School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore. Electronic address: yuanyf@zstu.edu.cn.
³ College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.
⁴ School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore. Electronic address: yzhuang@ntu.edu.sg.
⁵ College of Machinery Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China; Changshan Research Institute, Zhejiang Sci-Tech University, Changshan 324299, China. Electronic address: syiguo@zstu.edu.cn.

PMID: 36841171
DOI: 10.1016/j.jcis.2023.02.098

Abstract

Although transition metal selenides are considered to be extremely promising anode materials for lithium-ion batteries (LIBs), severe volume changes and low electronic conductivity are their huge and unavoidable challenges. To solve these problems, CoSe nanoparticles in-situ grown on the inner surface of every macropore of 3D honeycomb C is successfully synthesized by three simple steps: dense assembling of polystyrene spheres, calcination and gaseous selenylation. The sizes of CoSe and honeycomb pores are 10-15 nm and 190 nm, respectively. The content of CoSe is 72 wt%. This unique architecture guarantees high electrochemical activity, rapid reaction kinetics and excellent structural stability of CoSe, as identified by cycling and rate performance measurements, various electrochemical kinetics analyses and ex-situ characterization of the cycled electrode material. As a result, the CoSe@honeycomb C anode exhibits extraordinary cycling performance (823.5 mAh g^-1 after 200 cycles at 0.5 A g^-1, 610.1 mAh g^-1 after 250 cycles at 2 A g^-1, 247 mAh g^-1 after 1500 cycles at 5 A g^-1) and exceptional rate capability (261.9 mAh g^-1 at 10 A g^-1, 1491.4 mAh g^-1 at 0.1 A g^-1), demonstrating that it is a potential anode material for high-performance LIBs.

Keywords: Anode; CoSe; Honeycomb carbon; Lithium-ion batteries.