Issue 16, 2020

Nitrogen-doped polymer nanofibers decorated with Co nanoparticles for uniform lithium nucleation/growth in lithium metal batteries

Abstract

Lithium (Li) metal is deemed to be the most promising anode for new-generation lithium batteries due to its high specific capacity (3860 mA h g−1) and low redox potential (−3.04 V vs. SHE). However, Li dendritic formation during battery cycling results not only in poor performance, such as low coulombic efficiency and short cycling, but also serious safety risks such as fire and explosion. In this paper, we propose a novel interlayer with a 3D network which is rich in N-containing functional groups and Co nanoparticles to guide uniform Li nucleation/growth and thus relieve the Li dendritic formation. As a result, the as-designed composite delivers an ultra-long lifespan of 1500 h with a small and stable voltage profile of 38.1 mV for symmetric cells. The composite electrode also exhibits a prominent electrochemical performance in full cells with LiFePO4 as the cathode for lithium ion batteries (LIBs). Our findings provide strong support for inducing the uniform nucleation of Li by introducing lithiophilic sites, which is important for inhibiting Li dendritic formation.

Graphical abstract: Nitrogen-doped polymer nanofibers decorated with Co nanoparticles for uniform lithium nucleation/growth in lithium metal batteries

Supplementary files

Article information

Article type
Paper
Submitted
08 Feb 2020
Accepted
11 Mar 2020
First published
12 Mar 2020

Nanoscale, 2020,12, 8819-8827

Nitrogen-doped polymer nanofibers decorated with Co nanoparticles for uniform lithium nucleation/growth in lithium metal batteries

M. Shu, X. Li, L. Duan, M. Zhu and X. Xin, Nanoscale, 2020, 12, 8819 DOI: 10.1039/D0NR01111H

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