Surface-Phosphided Metal Oxide Microspheres as Catalytic Host of Sulfur to Enhance the Performance of Lithium–Sulfur Batteries

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(17), С. 21943 - 21952

Опубликована: Апрель 18, 2024

Lithium–sulfur (Li–S) batteries are one of the most promising high-energy density secondary due to their high theoretical energy 2600 Wh kg–1. However, sluggish kinetics and severe "shuttle effect" polysulfides well-known barriers that hinder practical applications. A carefully designed catalytic host sulfur may be an effective strategy not only accelerates conversion but also limit dissolution mitigate effect." Herein, in situ surface-phosphided Ni0.96Co0.03Mn0.01O (p-NCMO) oxide microspheres prepared via gas-phase phosphidation as a sulfur. The as-prepared unique heterostructured microspheres, with enriched surface-coated metal phosphide, exhibit superior synergistic effect absorption otherwise soluble intermediate polysulfides. Correspondingly, cathode exhibits excellent electrochemical performance, including initial discharge capacity (1162 mAh gs–1 at 0.1C), long cycling stability (491 after 1000 cycles 1C), rate performance (565 5C). Importantly, newly shows areal 4.0 cm–2 cycle under harsh conditions (high loading 5.3 mg lean electrolyte/sulfur ratio 5.8 μL mg–1). This work proposes develop hosts for achieving high-performance Li–S surface phosphidation.

Язык: Английский

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Chemically bonded Co2P-Cu3P heterostructure nanoparticles on porous carbon framework as efficient hydrogen evolution/oxidation electrocatalysts

Separation and Purification Technology, Год журнала: 2024, Номер unknown, С. 129863 - 129863

Опубликована: Сен. 1, 2024

Язык: Английский

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Carbon-Based Porous Bimetallic Phosphide in CNT Network as a Separator for Li–S Batteries

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(7), С. 7172 - 7183

Опубликована: Март 21, 2024

Lithium–sulfur (Li–S) batteries have received continuous attention due to their high theoretical specific capacity. However, the shuttle effect of lithium polysulfides (LiPSs) severely limits its development. Modification commercial polypropylene (PP) separators is regarded as an effective strategy suppress effect. In this paper, NiFe-PBA-derived carbon-based porous bimetallic phosphide (NFP) was inserted into carbon nanotube (CNT) networks, and these composites were utilized modify PP separator. CNT networks provide abundant pathways electron transport improve conductivity S cathode Li2S. Ni2P Fe2P in NFP exhibit robust chemisorption catalytic effects on LiPSs. Moreover, structures beneficial for Li+ immigration. The synergistic enable modified separator obtain a electrical conductivity, superior adsorption capability, enhanced performance. Assembled Li–S show initial discharge capacity 1244 mAh g–1 at 0.2 C. Notably, highest discharge-specific reached up 938.9 1 C, average decay rate per cycle after 300 cycles mere 0.067%. This study paves way research pathway harnessing transition metal phosphides materials separators, offering realize high-performance batteries.

Язык: Английский

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(FeO)2FeBO3 nanoparticles attached on interconnected nitrogen-doped carbon nanosheets serving as sulfur hosts for lithium–sulfur batteries

Frontiers of Materials Science, Год журнала: 2024, Номер 18(2)

Опубликована: Июнь 1, 2024

Язык: Английский

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Ni12P5 nanoparticles anchored P, N co-doped carbon nanosheets modified separators for superior lithium‑sulfur battery

Journal of Energy Storage, Год журнала: 2024, Номер 99, С. 113270 - 113270

Опубликована: Авг. 18, 2024

Язык: Английский

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