Cellulose substance derived nanofibrous activated carbon as a sulfur host for lithium-sulfur batteries

Li, Shun; Lin, Zehao; He, Gang; Huang, Jianguo

doi:10.1016/j.colsurfa.2020.125129

Cited by 22 publications

(19 citation statements)

References 60 publications

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“…Besides, a good rate capability with a reversible capacity of 789 mAh g −1 was obtained after high rate charge/discharge processes. As compared with the carbon based materials derived from other biomass sources as reported in the literatures (Table 3), [42,43] this natural cellulose substance based activated‐carbon/sulfur composite displayed higher cycling specific capacity as the cathodic materials for Li−S batteries. Benefiting from the three‐dimensionally conductive network structures of the cellulose‐derived activated carbon scaffolds, the large volume expansion of the sulfur and the dissolution and diffusion of the polysulfides during the discharge process were effectively restricted, which resulted in the excellent electrochemical performances of the natural cellulose substances based carbon‐sulfur material.…”

Section: Natural Cellulose Substances Based Carbon Materials For Lithmentioning

confidence: 65%

“…As an example, a nanofibrous activated carbon was fabricated via the alkali activation process by employing the biocompatible and low‐cost natural cellulose substance ( e. g . common commercial filter paper) as both the structural matrix and carbon source [42] . A schematic of the fabrication process of the corresponding cellulose derived carbon‐sulfur cathode was illustrated in Figure 4a.…”

Section: Natural Cellulose Substances Based Carbon Materials For Lithmentioning

confidence: 99%

Section: Natural Cellulose Substances Based Carbon Materials For Lithmentioning

confidence: 99%

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Natural Cellulose Substance Based Energy Materials

Lin

Huang

2021

Chemistry An Asian Journal

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Natural cellulose substances have been proven to be ideal structural templates and scaffolds for the fabrication of artificial functional materials with designed structures, psychochemical properties and functionalities. They possess unique hierarchically porous network structures with flexible, biocompatible, and environmental characteristics, exhibiting great potentials in the preparation of energy‐related materials. This minireview summarizes natural cellulose‐based materials that are used in batteries, supercapacitors, photocatalytic hydrogen generation, photoelectrochemical cells, and solar cells. When natural cellulose substances are employed as the structural template or carbon sources of energy materials, the three‐dimensional porous interwoven structures are perfectly replicated, leading to the enhanced performances of the resultant materials. Benefiting from the mechanical strengths of natural cellulose substances, wearable, portable, free‐standing, and flexible materials for energy storage and conversion are easily obtained by using natural cellulose substances as the substrates.

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Section: Natural Cellulose Substances Based Carbon Materials For Lithmentioning

confidence: 65%

Section: Natural Cellulose Substances Based Carbon Materials For Lithmentioning

confidence: 99%

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Natural Cellulose Substance Based Energy Materials

Lin

Huang

2021

Chemistry An Asian Journal

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“…Since sulfur is non-conductive, the cathode is prepared as a composite of sulfur with a conductive additive. The most frequently used conductive additives are porous carbons of different origin and morphology [ 2 , 3 , 4 , 5 , 6 , 7 ], carbon nanotubes [ 2 ], graphene oxide [ 2 , 8 ], hollow carbon spheres or nanofibers [ 7 ], and their combination in a form of hierarchical materials [ 7 , 8 , 9 , 10 ]. They provide both high electronic conductivity and enough space to accommodate volume changes during charging and discharging.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the dissolving of PS on the cathode pushes the reaction forward, but their diffusion to the anode and parasitic reactions with electrolyte solvents and Li anode worsen considerably the Coulombic efficiency, increase the self-discharge rate, and decrease the cell capacity [ 1 ]. Suppression of the above-mentioned issues consists in a confinement of PS diffusion to the cathode compartment, which can be achieved by an additional barrier layer between the cathode and the separator [ 11 ], appropriate separator modification [ 12 ], conductive additive structure engineering [ 3 , 6 , 8 , 10 , 13 , 14 ], or carbon additive surface functionalization [ 2 , 15 , 16 , 17 , 18 , 19 ]. Since the operation of the Li–S battery represents a complex problem involving both single- and two-phase processes, optimization of its performance requires a multifaceted approach as well.…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline TiO2/Carbon/Sulfur Composite Cathodes for Lithium–Sulfur Battery

et al. 2021

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This paper evaluates the influence of the morphology, surface area, and surface modification of carbonaceous additives on the performance of the corresponding cathode in a lithium–sulfur battery. The structure of sulfur composite cathodes with mesoporous carbon, activated carbon, and electrochemical carbon is studied by X-ray diffraction, nitrogen adsorption measurements, and Raman spectroscopy. The sulfur cathode containing electrochemical carbon with the specific surface area of 1606.6 m2 g−1 exhibits the best electrochemical performance and provides a charge capacity of almost 650 mAh g−1 in cyclic voltammetry at a 0.1 mV s−1 scan rate and up to 1300 mAh g−1 in galvanostatic chronopotentiometry at a 0.1 C rate. This excellent electrochemical behavior is ascribed to the high dispersity of electrochemical carbon, enabling a perfect encapsulation of sulfur. The surface modification of carbonaceous additives by TiO2 has a positive effect on the electrochemical performance of sulfur composites with mesoporous and activated carbons, but it causes a loss of dispersity and a consequent decrease of the charge capacity of the sulfur composite with electrochemical carbon. The composite of sulfur with TiO2-modified activated carbon exhibited the charge capacity of 393 mAh g−1 in cyclic voltammetry and up to 493 mAh g−1 in galvanostatic chronopotentiometry. The presence of an additional Sigracell carbon felt interlayer further improves the electrochemical performance of cells with activated carbon, electrochemical carbon, and nanocrystalline TiO2-modified activated carbon. This positive effect is most pronounced in the case of activated carbon modified by nanocrystalline TiO2. However, it is not boosted by additional coverage by TiO2 or SnO2, which is probably due to the blocking of pores.

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Waste Office Paper Derived Cellulose‐Based Carbon Host in Freestanding Cathodes for Lithium‐Sulfur Batteries

et al. 2022

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Due to large sulfur (S) content and simple manufacturing techniques, free-standing cathodes for lithium-sulfur (LiÀ S) batteries are gaining a lot of attention recently. Waste office paper, which is consumed in large quantities annually, was used to make a free-standing paper-based carbon (FPC) substrate, which inherited fiber-like morphology. In addition, reduced graphene oxide (rGO) nanosheets modified FPC (rGO@FPC) host was also prepared by a vacuum filtration method. After S impregnation, the FPC/S and rGO@FPC/S freestanding cathodes were employed in LiÀ S batteries. The rGO@FPC/S free-standing cathode exhibited extremely competitive electrochemical performance, including a reversible discharge capacity of 315 mAh g À 1 at 0.5 C after 500 cycles. This is due to the uniform S distribution, which boosts the utilization ratio, and the significant blocking action for polysulfide ions, which prevents the redox shuttle effect.

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Cellulose substance derived nanofibrous activated carbon as a sulfur host for lithium-sulfur batteries

Cited by 22 publications

References 60 publications

Natural Cellulose Substance Based Energy Materials

Natural Cellulose Substance Based Energy Materials

Nanocrystalline TiO2/Carbon/Sulfur Composite Cathodes for Lithium–Sulfur Battery

Waste Office Paper Derived Cellulose‐Based Carbon Host in Freestanding Cathodes for Lithium‐Sulfur Batteries

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