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P-doped CoSe2 nanoparticles embedded in 3D honeycomb-like carbon network for long cycle-life Na-ion batteries by Ye, Jiajia; Li, Xuting; Xia, Guang; Gong, Guanghao; Zheng, Zhiqiang; Chen, Chuanzhong; Hu, Cheng is a Engineering article available to read on EtoBox.

What is P-doped CoSe2 nanoparticles embedded in 3D honeycomb-like carbon network for long cycle-life Na-ion batteries about?

We report for the first time a Na-ion battery anode material composed of P-doped CoSe 2 nanoparticles (P-CoSe 2 ) with the size of 5-20 nm that are uniformly embed in a 3D porous honeycomb-like carbon network. High rate capability and cycling stability are achieved simultaneously. The honeycomb-like carbon network is rationally designed to support high electrical conductivity, rapid Na-ion diffusion as well as the accommodation of the volume expansion from the active P-CoSe 2 nanoparticles. In particular, heteroatom P-doping within CoSe 2 introduces stronger P-Co bonds and additional P-Se bonds that significantly improve the structure stability of P-CoSe 2 for highly stable sodiation/desodiation over long-term cycling. P-doping also improves the electrical conductivity of the CoSe 2 nanoparticles, leading to highly elevated electrochemical kinetics to deliver high specific capacities at high current densities. Benefiting from the unique nanostructure and atomic-level P-doping, the P-CoSe 2 (2:1)/C anode delivers an excellent cycle stability with a specific capacity of 206.9 mA h g -1 achieved at 2000 mA g -1 after 1000 cycles. In addition, this material can be synthesized using a f

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Author

Ye, Jiajia; Li, Xuting; Xia, Guang; Gong, Guanghao; Zheng, Zhiqiang; Chen, Chuanzhong; Hu, Cheng

Publisher

Allerton Press Inc; Elsevier ; Allerton Press Inc.; Elsevier BV (ISSN 1005-0302)

Published

2021

Language

EN

Field

Engineering (Physical Sciences)