Sucrose derived microporous–mesoporous carbon for advanced lithium–sulfur batteries

Wang, Nannan; Hong, Yong Cheol; Liu, Xiaoteng; Wang, Qi; Huang, Jiarui

doi:10.1016/j.ceramint.2020.08.202

Cited by 36 publications

(5 citation statements)

References 65 publications

(64 reference statements)

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“…Large mesopores and macropores can provide good ion transport channels and electrolyte infiltration channels. 26 To sum up, BHPC-4 with three-stage nested pore structure is speculated the best electrochemical feature, due to positive fast kinetics of carbon-based sulfur trestle. Then BHPC-4 and BHPC-4/S composite were further characterized.…”

Section: Resultsmentioning

confidence: 97%

“…Micropores and small mesopores can restrict the dissolution and the “Shuttling Effect” of polysulfide during cycling. Large mesopores and macropores can provide good ion transport channels and electrolyte infiltration channels 26 . To sum up, BHPC‐4 with three‐stage nested pore structure is speculated the best electrochemical feature, due to positive fast kinetics of carbon‐based sulfur trestle.…”

Section: Resultsmentioning

confidence: 99%

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Cicada wing‐like hierarchical porous carbon to facilitate the re‐deposition of sulfur for high‐performance lithium‐sulfur batteries

Yang

Fan

et al. 2022

Intl J of Energy Research

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Summary The poor electrical conductivity of elemental sulfur ultimately results in poorer cycle performance, restricting the marketization of lithium‐sulfur (Li‐S) batteries. Herein, a cicada wing‐like bio‐derived hierarchical porous carbon (BHPC) derived from economical and common oats was prepared and optimized to facilitate the re‐deposition of sulfur in the electrochemical reversible process. Due to the remarkable cicada wing‐like thin layer structure and instinctively three‐stage nested pores with aperture distribution of micropores, mesopores, and macropores as 35.12%, 27.67%, and 37.21% respectively, the BHPC‐4 can mainly provide good conductive network and lots of reactive sites to increase the electro‐reaction contact area as well as the effective utilization of sulfur. The bio‐derived carbon goes a step further to facilitate the re‐uniform distribution of active substances during the cycling and repress the “Shuttling Effect”. The initial discharge specific capacity at 0.1 C is 1554 mA h/g for BHPC‐4/S. Furthermore, the BHPC‐4/S cathode displayed a capacity decay of 0.096% and above 95% of the Coulombic efficiency over 500 cycles at 0.5 C and supported a terrific cycling stability. Novelty Statement This work investigates BHPC/S employed as cathode for Li‐S batteries. Series of bio‐derived hierarchical porous carbon (BHPC) were prepared by high‐temperature activation carbonization method with low‐cost oatmeal as biomass precursor material, KOH as the activator. The SEM images reflect the effect of activator dosage on the morphology of BHPC samples. Among them, the BHPC‐4 prepared under optimal conditions displays a three‐stage network pore structure with cicada wing‐like thin layer. The results of BET reveal that the specific surface area of BHPC‐4 is 1531.7 m2/g and the proportions of three kinds of pores in BHPC‐4 are 35.12%, 27.67%, 37.21%, respectively. The TEM image further proves the cicada wing‐like thin layer structure of BHPC‐4, which can provide vast number of active reaction sites and supply a large conductive network. The three‐stage network pore structure can accelerate the diffusion and adsorption of electrons and ions, effectively inhibit the dissolution and the “Shuttle Effect” of polysulfide, therefore enhance the utilization of active substance. The lithium polysulfide static adsorption test and UV‐vis absorption spectra imply BHPC‐4 can capture polysulfide effectively. Besides, the special structure of BHPC‐4 can facilitate the re‐uniform distribution of active substance during the cycling. So, the BHPC‐4/S electrode exhibits a high initial capacity of 1554 mA h/g at 0.1 C. Furthermore, after 500 ultra‐long cycles at 0.5 C, the BHPC‐4/S remained at 250 mA h/g and the average damping rate is 0.096%/per cycle. The Coulombic efficiency is stable over 95% during cycles. Moreover, it presents a superior rate capability and lower interfacial transfer resistance of 154.6 Ω.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Cicada wing‐like hierarchical porous carbon to facilitate the re‐deposition of sulfur for high‐performance lithium‐sulfur batteries

Yang

Fan

et al. 2022

Intl J of Energy Research

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“…1 B , Inset ). Using as the sulfur host, the synergy of macro-/meso-/microporous triple structure not only can ensure high sulfur utilization and anchor sulfur/sulfides firmly but also can provide good ion transport channels and effectively relieve the volume expansion of sulfur particles upon cycling, which facilitates to realize the fast kinetics and long-life cycling stability of sulfur-based batteries ( 33 , 34 ).…”

Section: Resultsmentioning

confidence: 99%

A triple-synergistic small-molecule sulfur cathode promises energetic Cu-S electrochemistry

Lin,

Zhang,

Yan

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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Metal-sulfur batteries have received great attention for electrochemical energy storage due to high theoretical capacity and low cost, but their further development is impeded by low sulfur utilization, poor electrochemical kinetics, and serious shuttle effect of the sulfur cathode. To avoid these problems, herein, a triple-synergistic small-molecule sulfur cathode is designed by employing N, S co-doped hierarchical porous bamboo charcoal as a sulfur host in an aqueous Cu-S battery. Expect the enhanced conductivity and chemisorption induced by N, S synergistic co-doping, the intrinsic synergy of macro-/meso-/microporous triple structure also ensures space-confined small-molecule sulfur as high utilization reactant and effectively alleviates the volume expansion during conversion reaction. Under a further joint synergy between hierarchical structure and heteroatom doping, the resulting sulfur cathode endows the Cu-S battery with outstanding electrochemical performance. Cycled at 5 A g −1 , it can deliver a high reversible capacity of 2,509.8 mAh g −1 with a good capacity retention of 97.9% after 800 cycles. In addition, a flexible hybrid pouch cell built by a small-molecule sulfur cathode, Zn anode, and gel electrolytes can firmly deliver high average operating voltage of about 1.3 V with a reversible capacity of over 2,500 mAh g −1 under various destructive conditions, suggesting that the triple-synergistic small-molecule sulfur cathode promises energetic metal-sulfur batteries.

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“…[6][7][8] These problems inevitably lead to low sulfur utilization rate, severe structural instability, limited capacity, rapid capacity decay, poor coulomb efficiency and so on. [4][5][6][7][8] To handle these challenges, various carbon/sulfur composites, such as nanostructured porous conducting carbon (e.g., Micro/mesoporous carbon, carbon nanotubes (CNTS), graphene, activated carbon), [9][10][11][12][13] have been paid close attention by improving electrode conductivity, providing fast ion/electron transport paths and capturing polysulde via physical domain. For instance, Nazar et al 9 reported a simple and widely available method for encapsulating sulfur into the porous structure of ordered mesoporous carbon (CMK-3) to provide both electrical contacts with sulfur and adequate controlled porosity for trapping polysuldes species.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of porous carbon shell confinement and catalytic conversion of nickel nanoparticle cores for improved lithium–sulfur batteries

et al. 2023

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Sucrose derived microporous–mesoporous carbon for advanced lithium–sulfur batteries

Abstract: Sucrose derived microporous-mesoporous carbon for advanced lithium-sulfur batteries. Ceramics International, 47 (1). pp. 899-906.

Cited by 36 publications

References 65 publications

Cicada wing‐like hierarchical porous carbon to facilitate the re‐deposition of sulfur for high‐performance lithium‐sulfur batteries

Cicada wing‐like hierarchical porous carbon to facilitate the re‐deposition of sulfur for high‐performance lithium‐sulfur batteries

A triple-synergistic small-molecule sulfur cathode promises energetic Cu-S electrochemistry

Synergistic effect of porous carbon shell confinement and catalytic conversion of nickel nanoparticle cores for improved lithium–sulfur batteries

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