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Tailoring the Growth and Morphology of Lithium Peroxide: Nickel Sulfide/Nickel Phosphate Nanotubes with Optimized Electronic Structure for Lithium–Oxygen Batteries by Se‐Si Li; Yu‐Si Liu; Xue‐Yan Wu; Kai‐Xue Wang; Jie‐Sheng Chen is a Engineering article available to read on EtoBox.

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## Abstract Heterogeneous crystalline‐amorphous structures, with tunable electronic structures and morphology, hold immense promise as catalysts for lithium‐oxygen batteries (LOBs). Herein, a nanotube network constructed by crystalline nickel sulfide/amorphous nickel phosphate (NiS/NiPO) heterostructure is prepared on Ni foam through the sulfurization of the precursor generated hydrothermally. Used as cathodes, the NiS/NiPO nanotubes with optimized electronic structure can induce the deposition of the highly porous and interconnected structure of Li~2~O~2~ with rich Li~2~O~2~–electrolyte interfaces. Abundant active sites can be created on NiS/NiPO through the charge redistribution for the uniform nucleation and growth of Li~2~O~2~. Moreover, nanotube networks endow cathodes with efficient transport channels and sufficient space for the accommodation of Li~2~O~2~. A high discharge capacity of 27 003.6 mAh g^−1^ and a low charge overpotential of 0.58 V at 1000 mAh g^−1^ can be achieved at 200 mA g^−1^. This work provides valuable insight into the unique role of the electronic structure and morphology of catalysts in the formation mechanisms of Li~2~O~2~ and the performances of LOBs.

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Author

Se‐Si Li; Yu‐Si Liu; Xue‐Yan Wu; Kai‐Xue Wang; Jie‐Sheng Chen

Publisher

Wiley

Published

2023

Language

EN

Field

Engineering (Physical Sciences)