Facile Carbon Fluoride/Sulfur Hybrid Cathode for High‐Rate Lithium Batteries

Peng, Sikan; Wang, Chen; Yan, Sen; Wang, Nan; Wang, Jixian; Dai, Shenglong

doi:10.1002/celc.201900619

Cited by 12 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pattern for as-fabricated material has some peaks that can be well-indexed to the elemental sulfur (JCPDS No. 08-0247). , Besides, the XRD peaks of Al-MOG and S-RGO are also rendered in Figure b.…”

Section: Resultsmentioning

confidence: 94%

Metal–Organic Aerogel Assisted Reduced Graphene Oxide Coated Sulfur as a Cathode Material for Lithium Sulfur Batteries

Chai

Yin

et al. 2021

Energy Fuels

View full text Add to dashboard Cite

As a sort of cathode material with appreciable theoretical capacity, sulfur has received a lot of attention for lithium− sulfur batteries. There is extensive research focused on cathode materials. However, relatively little attention has been gained on a binder in enhancing battery performance. The binding agent is a primary component in the cathode and plays an important role in solving the sulfur volume expansion problem during the reaction. In this work, Al (III)-carboxylate metal−organic aerogels (Al-MOGs) are reported for the first time as a binder, which can anchor the diffusion of hydrophilic polysulfides in the cathode and restrain a self-discharge reaction from proceeding for the Li−S battery. In the charge−discharge system, the admirable electrochemical performance of the as-fabricated combination cathode is proven through a satisfactory initial discharge capacity and good rate performance (1391 mAh g −1 at 0.3 C and 664 mAh g −1 at 6.0 C) and a notable cyclability (902 mAh g −1 after 200 cycles at 0.3 C). Accordingly, the creation of Al-MOG gives an updated perception for high-energy-density Li−S batteries.

show abstract

Section: Resultsmentioning

confidence: 94%

Metal–Organic Aerogel Assisted Reduced Graphene Oxide Coated Sulfur as a Cathode Material for Lithium Sulfur Batteries

Chai

Yin

et al. 2021

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…For traditional C/S composite electrode (Figure 6f,g), the peaks of S 8 (150, 219, and 474 cm −1 ), Li 2 S 6 (176 and 398 cm −1 ) , Li 2 S 4 (202, 235, and 413 cm −1 ), Li 2 S 2 and Li 2 S can be seen during in situ Raman spectral signal collection process, demonstrating a typical electrochemical reactions from S 8 to Li 2 S and then back to S 8 in traditional Li–S battery system. [ 37–44 ] The results clearly indicate different electrochemical behaviors and intermediate products between 3DHG/PS and traditional C/S electrodes. The polysulfide in 3DHG/PS cathode mainly exists in the form of insoluble Li 2 S during charge/discharge, implying the 3DHG/PS composite architecture could effectively avoid severe shuttling effect of long‐chain polysulfides and therefore realize an excellent cycling stability.…”

Section: Resultsmentioning

confidence: 99%

3D Holey Graphene/Polyacrylonitrile Sulfur Composite Architecture for High Loading Lithium Sulfur Batteries

Wang

Zhang

Zhong

et al. 2021

Advanced Energy Materials

154

View full text Add to dashboard Cite

Lithium sulfur (Li–S) batteries have attracted considerable interest as next‐generation high‐density energy storage devices. However, their practical application is limited by low capacity and rapid capacity fading at commerical‐level mass loadings, which is largely attributed to the inferior electron/ion conduction, as well as severe the shuttling effect of soluble polysulfide species. To address these issues, a three‐dimensional holey graphene/polyacrylonitrile sulfur (3DHG/PS) composite cathode is developed for high‐mass‐loading Li–S batteries. The unique architectural design with the 3D holey graphene framework ensures fast electron and ion transport within the thick electrode, and affords enough space for mitigating the volume expansion of the electrode. Moreover, in situ Raman results demonstrate that covalent sulfur within 3DHG/PS fundamentally avoids forming soluble lithium polysulfides, which effectively reduces the undesired shuttling effect. With these advantages, the 3DHG/PS cathode exhibits an ultra‐low capacity fading rate of 0.012% per cycle after continuous 1500 cycles, as well as high specific capacity and superior rate capability with a high mass loading of 15.2 mg cm–2, which offers a promising avenue to construct future Li–S batteries with superior performance at mass loadings that exceed commercial levels.

show abstract

“…From Figure (b), these membranes after cycling all present remarkably reduced resistances when compared with the corresponding fresh cells, which was probably caused by the rearrangement of the physically stable active materials and electrochemically favourable sites. The obtained results indicated a closer contact among the electrodes, separator and collector after cycling . All of these testing results explained why the Li−S battery armed with SiO 2 −F co‐doped PMIA separator has such outstanding conductivity and excellent reversible electrochemical performances.…”

Section: Resultsmentioning

confidence: 58%

Physical Inhibition and Chemical Confinement of Lithium Polysulfides by Designing a Double‐Layer Composite Separator for Lithium‐Sulfur Battery

et al. 2019

View full text Add to dashboard Cite

In this study, a novel double‐layer composite separator based on F‐doped poly‐m‐phenyleneisophthalamide (PMIA) and silicon dioxide (SiO2)−F co‐doped PMIA membrane is designed and prepared by electrospinning technology. The combination of F‐doped PMIA membrane and SiO2−F co‐doped PMIA membrane endows the functional separator with exceedingly high electrolyte uptake and retention, greatly prominent thermostability, and prevented shrinkage. Moreover, its strong physical inhibition and chemisorption can also confine polysulfides. Thus, the lithium‐sulfur (Li−S) batteries using the prepared membrane presented a high initial discharge capacity of 1274.8 mAh g−1 and maintained a reversible discharge capacity of 814.8 mAh g−1 with high Coulombic efficiency of 98.42 % after 600 cycles at 0.5 C. Meanwhile, the cell exhibited small interfacial resistance and excellent rate capacity. The excellent properties were attributed to high ionic conductivity offered by the large pore volume of unique 3D nanofiber network, excellent liquid electrolyte uptake of SiO2−F co‐doped PMIA membrane, and less “shuttle effect” suppressed by both the physical inhibition of polysulfides by the formed gel polymer electrolyte based on F‐doped PMIA membrane and chemical confinement of polysulfides by the addition of F and SiO2. The results indicated that the composite separator through the inexpensive, unsophisticated, and efficient preparation method can provide a good choice for high‐performance Li−S batteries.

show abstract

Facile Carbon Fluoride/Sulfur Hybrid Cathode for High‐Rate Lithium Batteries

Cited by 12 publications

References 34 publications

Metal–Organic Aerogel Assisted Reduced Graphene Oxide Coated Sulfur as a Cathode Material for Lithium Sulfur Batteries

Metal–Organic Aerogel Assisted Reduced Graphene Oxide Coated Sulfur as a Cathode Material for Lithium Sulfur Batteries

3D Holey Graphene/Polyacrylonitrile Sulfur Composite Architecture for High Loading Lithium Sulfur Batteries

Physical Inhibition and Chemical Confinement of Lithium Polysulfides by Designing a Double‐Layer Composite Separator for Lithium‐Sulfur Battery

Contact Info

Product

Resources

About