Core-double shell sulfur@carbon black nanosphere@oxidized carbon nanosheet composites as the cathode materials for Li-S batteries

Chiochan, Poramane; Phattharasupakun, Nutthaphon; Wutthiprom, Juthaporn; Suksomboon, Montakan; Kaewruang, Siriroong; Suktha, Phansiri; Sawangphruk, Montree

doi:10.1016/j.electacta.2017.03.199

Cited by 22 publications

(10 citation statements)

References 55 publications

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“…Carbon fiber paper (CFP) with a thickness of 400 μm and an electrical resistance of < 12 MΩ cm −2 (SGL CARBON SE, Germany) was firstly soaked in the mixed solution of H 2 SO 4 and HNO 3 in a volume ratio of 3:1 at 60 °C for 1 h. The CFP was washed with DI water several times and dried at 60 °C overnight to obtain the functionalized-CFP ( f -CFP) 23 , 41 . To prepare the Janus interlayer (ZnPTz/ f -CFP), ZnPTz was mixed with super P and polyvinylidene fluoride (PVDF) in a weight ratio of 8:1:1 in N -methyl-pyrrolidone to form a slurry.…”

Section: Methodsmentioning

confidence: 99%

Chemical Adsorption and Physical Confinement of Polysulfides with the Janus-faced Interlayer for High-performance Lithium-Sulfur Batteries

Chiochan

Kaewruang

Phattharasupakun

et al. 2017

Sci Rep

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We design the Janus-like interlayer with two different functional faces for suppressing the shuttle of soluble lithium polysulfides (LPSs) in lithium-sulfur batteries (LSBs). At the front face, the conductive functionalized carbon fiber paper (f-CFP) having oxygen-containing groups i.e., -OH and -COOH on its surface was placed face to face with the sulfur cathode serving as the first barrier accommodating the volume expansion during cycling process and the oxygen-containing groups can also adsorb the soluble LPSs via lithium bonds. At the back face, a crystalline coordination network of [Zn(H2PO4)2(TzH)2]n (ZnPTz) was coated on the back side of f-CFP serving as the second barrier retarding the left LPSs passing through the front face via both physical confinement and chemical adsorption (i.e. Li bonding). The LSB using the Janus-like interlayer exhibits a high reversible discharge capacity of 1,416 mAh g−1 at 0.1C with a low capacity fading of 0.05% per cycle, 92% capacity retention after 200 cycles and ca. 100% coulombic efficiency. The fully charged LSB cell can practically supply electricity to a spinning motor with a nominal voltage of 3.0 V for 28 min demonstrating many potential applications.

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Section: Methodsmentioning

confidence: 99%

Chemical Adsorption and Physical Confinement of Polysulfides with the Janus-faced Interlayer for High-performance Lithium-Sulfur Batteries

Chiochan

Kaewruang

Phattharasupakun

et al. 2017

Sci Rep

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“…As shown in Figure a, the resolved high‐resolution S 2p XPS spectrum displays several peaks over the binding energy of 172 ~ 162 eV. Among them, the S 2p peaks at 170.1, 168.6, 166.7, and 166.3 eV correspond to the polythionate complex and sulfite, respectively . These species can be attributed to the partial oxidation of the chain end S 2− due to the unavoidable air exposure in the interval during the XPS measurement.…”

Section: Resultsmentioning

confidence: 98%

“…However, despite the intrinsic low electronic conductivity of S cathode, the critical issue of Li‐S battery is the dissolution of polysulfides in the electrolyte, so‐called “shuttle effect,” which causes low Coulombic efficiency, capacity fading, Li corrosion, and self‐discharging . To address challenging issues, rational designs of the electrode are examined in the Li‐S battery system, including 1) impregnation of sulfur inside the hierarchical structural carbon hosts (i.e., graphene, carbon nanotube, carbon nanofiber, and meso/microporous carbon), 2) warping of the sulfur with compact shell materials (hollow carbon sphere, functional polymers), and 3) capturing of sulfur species with the polarity materials (e.g., metal, metal oxides, transition metal sulfide, covalent organic frameworks (COFs), heteroatom‐doped carbon, MXene,). Additionally, well‐designed chemical‐confinement strategies (i.e., introduction of sulfur in polysulfides polymer) are adopted to improve the cycling stability of Li‐S cells.…”

Section: Introductionmentioning

confidence: 99%

Stable and Fast Lithium–Sulfur Battery Achieved by Rational Design of Multifunctional Separator

Song

Peng

Bian

et al. 2019

Energy & Environ Materials

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Lithium–sulfur (Li‐S) battery is considered as one of the most promising candidates for future portable electronics and electric vehicles due to high energy density and potentially low cost. However, the severe polysulfides shuttling in Li‐S battery always causes low Coulombic efficiency, capacity fading, and hindering its practical commercialization. Herein, a dual‐functional PEI@MWCNTs‐CB/MWCNTs/PP (briefly denoted as PMS) separator is assembled through Langmuir–Blodgett–Scooping (LBS) technique for improvement of Li‐S battery performance, that is, rational integrating conductive MWCNTs multilayer on a routine PP separator with polyethyleneimine (PEI) polymer. Owing to “proton‐sponge”‐based PEI feature with the abundant amino/imine groups and branched structures, the PMS separator can provide strong affinity to immobilize the negatively charged polysulfides via electrostatic interaction. Simultaneously, incorporated with the conductive MWCNTs multilayers for the electron transportation, the Li‐S cells assembled with PMS separators achieve exceptional high delivery capacity, good rate performance (~550 mAh g−1 at a current density of 9 A g−1), and stable cycling retention (retention of 84.5% at a current density of 1 A g−1) even over 120 cycles, especially in the case of high‐loading sulfur cathode (80 wt% of S content). This multifunctional separator with dual‐structural architectures via self‐assembly LBS method paves new avenues to develop high‐performance Li‐S batteries.

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“…The I D /I G value of S/graphene is 1.17, indicating a highly defective graphite structure, which is beneficial to fast electron transfer [ 28 ]. Moreover, there are three characteristic Raman peaks of sulfur at 150, 215 and 477 cm −1 , indicating the inclusion of sulfur in the composite [ 29 ].…”

Section: Resultsmentioning

confidence: 99%

A 3D MoS2/Graphene Microsphere Coated Separator for Excellent Performance Li-S Batteries

Yang

Zhang

Tan³

et al. 2018

Materials

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Lithium-sulfur (Li-S) batteries are the most prospective energy storage devices. Nevertheless, the poor conductivity of sulfur and the shuttling phenomenon of polysulfides hinder its application. In this paper, flower-like MoS2/graphene nanocomposite is prepared and deposited on a multi-functional separator to enhance the electrochemical behavior of Li-S batteries. The results demonstrated that the MoS2/graphene-coated separator is contributing to inhibit the shuttling phenomenon of polysulfides and improve the integrity of sulfur electrode. The initial discharge capacity of the battery using MoS2/graphene-coated separator at 0.2 C was up to 1516 mAh g−1. After 100 cycles, a reversible capacity of 880 mAh g−1 and a coulombic efficiency of 98.7% were obtained. The improved electrochemical behavior can be due to the nanostructure and Mo-S bond of the MoS2/graphene composite, which can combine physical shielding and chemisorption to prohibit the shuttle effect of polysulfides. The results prove that the MoS2/graphene-coated separator has the potential for feasible application in Li-S batteries to enhance their electrochemical performance.

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Core-double shell sulfur@carbon black nanosphere@oxidized carbon nanosheet composites as the cathode materials for Li-S batteries

Cited by 22 publications

References 55 publications

Chemical Adsorption and Physical Confinement of Polysulfides with the Janus-faced Interlayer for High-performance Lithium-Sulfur Batteries

Chemical Adsorption and Physical Confinement of Polysulfides with the Janus-faced Interlayer for High-performance Lithium-Sulfur Batteries

Stable and Fast Lithium–Sulfur Battery Achieved by Rational Design of Multifunctional Separator

A 3D MoS2/Graphene Microsphere Coated Separator for Excellent Performance Li-S Batteries

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