Self-supported VN arrays coupled with N-doped carbon nanotubes embedded with Co nanoparticles as a multifunctional sulfur host for lithium-sulfur batteries

Zhuang, Yaxuan; Fei, Ban; Zhang, Chaoqi; Wang, Yaguang; Cai, Daoping; Zhan, Hongbing

doi:10.1016/j.cej.2021.132931

Cited by 35 publications

(12 citation statements)

References 64 publications

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“…Areal capacities of high-sulfur-loaded Li–S batteries using the DCNS/CFC electrode at (a) 5 and (b) 10 mg cm –2 at 0.1 C. (c) Comparison of the sulfur loading, electrolyte/sulfur ratio, and areal capacity for the DCNS/CFC cathode with other reported works including *, clover, heart, spade, ⧫, and ▽ …”

Section: Resultsmentioning

confidence: 99%

DNA-Guided Li₂S Nanostructure Deposition for High-Sulfur-Loaded Li–S Batteries

Song

et al. 2023

ACS Appl. Nano Mater.

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The low areal capacity caused by low sulfur loading (<2.0 mg cm −2 ) and the poor sulfur utilization due to the insulating Li 2 S layer covering the cathode always limit the practical applications of lithium−sulfur batteries (Li−S batteries). Deoxyribonucleic acid (DNA)-controlled nucleation and growth of Li 2 S in the Li−S system were first studied in this work. The negatively charged sugar-phosphate backbone of DNA could attract Li + ions and allow crystalline Li 2 S to grow along the DNA chains. The electrodeposition of Li 2 S with a unique three-dimensional nanostructure during the polysulfide conversion and deposition process was realized, which can not only boost electron and ion transport but also expose and retain more active sites in the cathode. A Li−S battery with ultrahigh sulfur loading of 10 mg cm −2 and a low electrolyte/sulfur ratio of 6.08 delivered a high areal capacity of 8.1 mA h cm −2 , which is more than 2 times that of commercial Li-ion batteries, demonstrating a great enhancement of the Li−S battery compared to other studies. Therefore, this study provides an effective strategy of DNA-guided 3D Li 2 S deposition for achieving high-sulfurloading Li−S batteries.

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Section: Resultsmentioning

confidence: 99%

DNA-Guided Li₂S Nanostructure Deposition for High-Sulfur-Loaded Li–S Batteries

Song

et al. 2023

ACS Appl. Nano Mater.

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“…It is found that the cell delivers a high initial capacity of 959 mAh g –1 after an active cycle at 0.2 C and remains 590 mAh g –1 after 800 cycles with a low capacity fading rate of 0.048% per cycle. Compared with other published works with metal compounds as catalytic host in sulfur electrodes, − this work with the metal free CMP@CNT as catalytic coatings for separators is undoubtedly outstanding in reducing the costs of batteries and understanding the structure–property relationship of the catalytic materials. Moreover, common CNT rather than well-designed materials was used as the sulfur host to demonstrate the application potential of CMP@CNT modified separator.…”

Section: Resultsmentioning

confidence: 99%

Donor–Acceptor Conjugated Microporous Polymer toward Enhanced Redox Kinetics in Lithium–Sulfur Batteries

Huang

Zhang

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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Conjugated microporous polymers (CMPs) with porous structure and rich polar units are favorable for high-performance lithium−sulfur (Li−S) batteries. However, understanding the role of building blocks in polysulfide catalytic conversion is still limited. In this work, two triazine-based CMPs are constructed by electron-accepting triazine with electron-donating triphenylbenzene (CMP-B) or electron-accepting triphenyltriazine (CMP-T), which can grow on a conductive carbon nanotube (CNT) to serve as separator modifiers for Li−S batteries.

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“…[122] In addition, the introduction of highly conductive ingredients (such as transition metal nitrides, namely, vanadium nitride) can boost the diffusion of lithium ions within the electrode (with the diffusion coefficient of up to ≈10 −7 cm 2 s −1 ) and simultaneously enhance the electronic conductivity of the cathode (by decreasing the charge transfer resistance of the cells). [123] Furthermore, the kinetics of the redox process can be enhanced by involving catalytic materials (e.g., metal-based compounds: metal nanoparticles/sulfides/carbides/phosphides/sulfates/nitrides/hydroxides) in the electrochemical conversion of the sulfur-containing species. For instance, cobalt phosphide (Co 2 P) integrated with CNTs (as the cathode host) is effective in accelerating the redox conversion of Li 2 S 4 to Li 2 S 2 /Li 2 S by significantly reducing the reaction energy barriers (indicated by the right-shifted starting point of the reduction peak in the CV profiles, as shown in Figure 12g).…”

Section: Hybridization Strategiesmentioning

confidence: 99%

Solutions to the Challenges of Lithium–Sulfur Batteries by Carbon Nanotubes

Shearer

et al. 2023

Advanced Sustainable Systems

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The continuously increasing demands for energy storage devices for portable electronics and electric vehicles have aroused massive research interest in developing lithium–sulfur batteries (LSBs) with high energy density and long‐term stability. Carbon nanotubes (CNTs), possessing numerous superior properties, are integrated into various components of LSBs for performance improvement. Nevertheless, a systematic and insightful issue‐based study of their inherent roles in addressing the practical challenges of LSBs is lacking. There is a growing consensus that CNTs do not directly contribute to the specific capacity (i.e., being involved in the redox reactions with electron loss/gain), while their auxiliary roles, such as providing a conductive and mechanically reinforced framework for active materials, are of prime significance in regulating the electrochemical reaction, charge transport, and mass transfer in the system. In this paper, after briefly introducing the working principles of LSBs and the promising applicability of CNTs, current challenges in various components of LSBs are discussed with the corresponding CNT‐based solutions, followed by an evaluation of the potential for commercializing CNT‐involved LSBs. Finally, some future research directions are provided to improve the device performance further.

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Self-supported VN arrays coupled with N-doped carbon nanotubes embedded with Co nanoparticles as a multifunctional sulfur host for lithium-sulfur batteries

Cited by 35 publications

References 64 publications

DNA-Guided Li₂S Nanostructure Deposition for High-Sulfur-Loaded Li–S Batteries

DNA-Guided Li₂S Nanostructure Deposition for High-Sulfur-Loaded Li–S Batteries

Donor–Acceptor Conjugated Microporous Polymer toward Enhanced Redox Kinetics in Lithium–Sulfur Batteries

Solutions to the Challenges of Lithium–Sulfur Batteries by Carbon Nanotubes

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Self-supported VN arrays coupled with N-doped carbon nanotubes embedded with Co nanoparticles as a multifunctional sulfur host for lithium-sulfur batteries

Cited by 35 publications

References 64 publications

DNA-Guided Li2S Nanostructure Deposition for High-Sulfur-Loaded Li–S Batteries

DNA-Guided Li2S Nanostructure Deposition for High-Sulfur-Loaded Li–S Batteries

Donor–Acceptor Conjugated Microporous Polymer toward Enhanced Redox Kinetics in Lithium–Sulfur Batteries

Solutions to the Challenges of Lithium–Sulfur Batteries by Carbon Nanotubes

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DNA-Guided Li₂S Nanostructure Deposition for High-Sulfur-Loaded Li–S Batteries

DNA-Guided Li₂S Nanostructure Deposition for High-Sulfur-Loaded Li–S Batteries