Issue 20, 2023

An in situ formed lithiophilic Ni3S2@Ni current collector for stable lithium metal batteries

Abstract

Attracting immense interest as a lithium storage material, lithium metal anodes boast the highest specific capacity of 3860 mA h g−1 and lowest redox potential of −3.04 V, compared to the standard hydrogen electrode, and sustainability. Nevertheless, extreme dendrite growth, severe lithium deposition, and enormous volume alteration have seriously impeded the practical progress of lithium anodes. To address these problems, researchers have proposed to construct three-dimensional (3D) current collectors, which can adjust Li deposition and improve cycle stability. Herein, we in situ grow lithiophilic Ni3S2 nanowire arrays on a porous nickel current collector (hereinafter denoted as Ni3S2@Ni) by a simple hydrothermal reaction, which significantly improved the Li metal anode performance. This Ni3S2@Ni composite current collector has a relatively uniform and open micro–nano structure, which facilitates Li+ ion migration/diffusion and also improves electrode–electrolyte interfacial properties. In addition, the Ni3S2@Ni composite current collector achieves a prolonged lithium plating/stripping lifespan of 900 hours at 2 mA cm−2 without short circuit in symmetrical batteries. Furthermore, a full cell assembled with the composite current collector and a LiFePO4 cathode demonstrates outstanding cycling stability, where the capacity retention is 80.6% after 500 cycles at 1C. Our proposed 3D Ni3S2@Ni composite current collector will further boost the development of stable Li metal anodes.

Graphical abstract: An in situ formed lithiophilic Ni3S2@Ni current collector for stable lithium metal batteries

Article information

Article type
Paper
Submitted
21 Jun 2023
Accepted
26 Ago 2023
First published
29 Ago 2023

Sustainable Energy Fuels, 2023,7, 5029-5038

Author version available

An in situ formed lithiophilic Ni3S2@Ni current collector for stable lithium metal batteries

M. Qi, L. Xie, Q. Han, X. Qiu, S. Katiyar, X. Liu, S. Yang, L. Zhu, X. Wu, L. Chen and X. Cao, Sustainable Energy Fuels, 2023, 7, 5029 DOI: 10.1039/D3SE00798G

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