Nitrogen-doped multi-channel carbon nanofibers incorporated with nickel nanoparticles as a multifunctional modification layer of the separator for ultra stable Li–S batteries

Wang, Zhikang; Cao, Guiqiang; Bi, Da; Tan, Tianxiong; Lai, Qingxue; Liang, Yanyu

doi:10.1039/d1nj01186c

Cited by 4 publications

(2 citation statements)

References 41 publications

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“…Three peaks at 401.2, 399.6, and 398.3 eV were ascribed to graphitic- N , pyrrolic- N , and pyridinic- N , respectively. More significantly, the pyrrolic- N and pyridinic- N as dominant nitrogen species doped on the carbon surface could guarantee a high chemical affinity and enhance the chemical adsorption of polysulfides by producing the extrinsic defects. − The peak situated at 397.7 eV was attributed to the Mo–N bond, and the shoulder peak at 395.3 eV was attributed to Mo 3p 3/2 ; both of them verified the formation of MoN.…”

Section: Results and Discussionmentioning

confidence: 93%

Thorn-Like Carbon Nanofibers Combined with Molybdenum Nitride Nanosheets as a Modified Separator Coating: An Efficient Chemical Anchor and Catalyst for Li–S Batteries

Tan

Chen

Wang

et al. 2022

ACS Appl. Energy Mater.

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Lithium–sulfur (Li–S) batteries have been regarded as one of the most promising candidates for the next-generation energy storage devices, attributed to their rather high theoretical energy density. However, affected by the shuttle effect and slow redox kinetics of lithium polysulfides (LiPSs), the application of the Li–S batteries is seriously hampered. Herein, novel thorn-like carbon nanofibers combined with molybdenum nitride nanosheets (denoted as MoN@CNFs) were well designed as a modified separator coating for Li–S batteries to restrain the shuttle effect and strengthen the redox kinetics of LiPSs. The conductive carbon nanofibers provided fast electronic transport, and the decorated MoN nanosheets possessed strong affinity to sulfur species, which could effectively anchor LiPSs, boost their redox reaction as an electrocatalyst,accelerate the reversible soluble/insoluble phase conversion process, and greatly increase the efficiency of active substance utilization. As a result, the Li–S batteries with the separators modified by MoN@CNFs exhibited outstanding rate performance, stable cycling capacity, and improved reaction kinetics, which delivered a high initial capacity of 1074 mA h g–1 at 0.2 C and sustained a capacity of 531 mA h g–1 after 500 cycles at 2 C, with only 0.055% capacity fade per cycle.

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Section: Results and Discussionmentioning

confidence: 93%

Thorn-Like Carbon Nanofibers Combined with Molybdenum Nitride Nanosheets as a Modified Separator Coating: An Efficient Chemical Anchor and Catalyst for Li–S Batteries

Tan

Chen

Wang

et al. 2022

ACS Appl. Energy Mater.

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“…CNFs are 1D structures with a diameter of around 100 nm and lengths of 200 μm and are frequently fabricated via the carbonization of polymer nanofibers like PAN [ 91 , 92 ] (discussed in Section 4.1 ). While CNFs have been widely used as modifiers to polyolefin separators or as interlayers in LSBs [ 93 , 94 , 95 , 96 , 97 , 98 , 99 ], there has been growing interest in implementing CNFs directly as separators. However, CNF separators cannot be used directly as separators in LSBs, owing to their poor LiPS-rejection capabilities.…”

Section: Novel Nanofiber Separatorsmentioning

confidence: 99%

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

2023

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Lithium-Sulfur batteries (LSBs) are one of the most promising next-generation batteries to replace Li-ion batteries that power everything from small portable devices to large electric vehicles. LSBs boast a nearly five times higher theoretical capacity than Li-ion batteries due to sulfur’s high theoretical capacity, and LSBs use abundant sulfur instead of rare metals as their cathodes. In order to make LSBs commercially viable, an LSB’s separator must permit fast Li-ion diffusion while suppressing the migration of soluble lithium polysulfides (LiPSs). Polyolefin separators (commonly used in Li-ion batteries) fail to block LiPSs, have low thermal stability, poor mechanical strength, and weak electrolyte affinity. Novel nanofiber (NF) separators address the aforementioned shortcomings of polyolefin separators with intrinsically superior properties. Moreover, NF separators can easily be produced in large volumes, fine-tuned via facile electrospinning techniques, and modified with various additives. This review discusses the design principles and performance of LSBs with exemplary NF separators. The benefits of using various polymers and the effects of different polymer modifications are analyzed. We also discuss the conversion of polymer NFs into carbon NFs (CNFs) and their effects on rate capability and thermal stability. Finally, common and promising modifiers for NF separators, including carbon, metal oxide, and metal-organic framework (MOF), are examined. We highlight the underlying properties of the composite NF separators that enhance the capacity, cyclability, and resilience of LSBs.

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Multifunctional Ni/NiO heterostructure nanoparticles doped carbon nanorods modified separator for enhancing Li–S battery performance

Wang²,

Zhu³

et al. 2022

Electrochimica Acta

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Nitrogen-doped multi-channel carbon nanofibers incorporated with nickel nanoparticles as a multifunctional modification layer of the separator for ultra stable Li–S batteries

Abstract: This work provided insight into the mechanism of the reversible conversion of LiPSs and the construction of ultra-stable Li–S batteries.

Cited by 4 publications

References 41 publications

Thorn-Like Carbon Nanofibers Combined with Molybdenum Nitride Nanosheets as a Modified Separator Coating: An Efficient Chemical Anchor and Catalyst for Li–S Batteries

Thorn-Like Carbon Nanofibers Combined with Molybdenum Nitride Nanosheets as a Modified Separator Coating: An Efficient Chemical Anchor and Catalyst for Li–S Batteries

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

Multifunctional Ni/NiO heterostructure nanoparticles doped carbon nanorods modified separator for enhancing Li–S battery performance

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