Synergistic stabilizing lithium sulfur battery via nanocoating polypyrrole on cobalt sulfide nanobox

Song, Yan; Wang, He; Yu, Wensheng; Wang, Jinxian; Liu, Guixia; Li, Dan; Wang, Tingting; Yang, Ying; Dong, Xiangting; Ma, Qianli

doi:10.1016/j.jpowsour.2018.10.032

Cited by 45 publications

(29 citation statements)

References 47 publications

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“…[ 15 ] However, metal sulfides generally have poor electrical conductivity and high gravimetric density. To address these issues, recently nanostructural metal sulfides combined with carbon materials such as ultrathin TiS 2 nanosheets layered with N, S codoped carbon, [ 35 ] interlaced carbon nanotubes threaded hollow Co 3 S 4 nanoboxes, [ 36 ] polypyrrole on CoS nanoboxes, [ 37 ] and CoS 2 nanoparticles embedded in porous carbon [ 38 ] have been reported.…”

Section: Introductionmentioning

confidence: 99%

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Boyjoo

Shi

Olsson

et al. 2020

Advanced Energy Materials

113

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of 2600 Wh kg −1 and are recognized as one of high energy density storage devices for practical applications. In LSBs the cathode material is mainly sulfur, which is abundantly available, low cost, environmentally friendly and has high theoretical capacity of 1675 mAh g −1 . [1][2][3][4][5][6] However, the challenging issues associated with sulfur-based cathodes are: 1) the low electrical conductivity of sulfur, 2) the dissolution and shuttling effects of lithium polysulfides (LiPs), and 3) large volume variations during charge/discharge cycles. These bring about low efficiency, poor cycling stability, self-discharge phenomena, and ultimately degradation of the electrode material, all of which currently limit the potential commercialization of LSBs. These drawbacks, especially the difficulty to confine LiPs are the current research priorities in the field of LSBs. [1,7,8] To overcome these problems, a vast amount of research has been carried out in the last decade. The encapsulation of sulfur in a conductive carbon host can effectively improve the electrical conductivity of sulfur. Moreover, carbon offers a physical barrier that encapsulates the LiP intermediates. [9][10][11][12] Nevertheless, such weak physical confinement is not enough to suppress the eventual diffusion of LiPs over time. [13] Due to the polar nature of LiPs, the strategies involving functional polar substrates as Lithium-sulfur batteries (LSBs) are a class of new-generation rechargeable high-energy-density batteries. However, the persisting issue of lithium polysulfides (LiPs) dissolution and the shuttling effect that impedes the efficiency of LSBs are challenging to resolve. Herein a general synthesis of highly dispersed pyrrhotite Fe 1−x S nanoparticles embedded in hierarchically porous nitrogen-doped carbon spheres (Fe 1−x S-NC) is proposed.Fe 1−x S-NC has a high specific surface area (627 m 2 g −1 ), large pore volume (0.41 cm 3 g −1 ), and enhanced adsorption and electrocatalytic transition toward LiPs. Furthermore, in situ generated large mesoporous pores within carbon spheres can accommodate high sulfur loading of up to 75%, and sustain volume variations during charge/discharge cycles as well as improve ionic/mass transfer. The exceptional adsorption properties of Fe 1−x S-NC for LiPs are predicted theoretically and confirmed experimentally. Subsequently, the electrocatalytic activity of Fe 1−x S-NC is thoroughly verified. The results confirm Fe 1−x S-NC is a highly efficient nanoreactor for sulfur loading. Consequently, the Fe 1−x S-NC nano reactor performs extremely well as a cathodic material for LSBs, exhibiting a high initial capacity of 1070 mAh g −1 with nearly no capacity loss after 200 cycles at 0.5 C. Furthermore, the resulting LSBs display remarkably enhanced rate capability and cyclability even at a high sulfur loading of 8.14 mg cm −2 .

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Section: Introductionmentioning

confidence: 99%

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Boyjoo

Shi

Olsson

et al. 2020

Advanced Energy Materials

113

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“…However, soluble and polar lithium polysulfides can lose their electrical contact with nonpolar carbon materials and dissolve into the electrolyte after a long work time as a consequence of weak polar-nonpolar effects, leading to poor Coulombic efficiency, low utilization of S and slow redox kinetics [40,41]. Thus, polar host materials, such as transition metal oxides and sulfides, are employed to improve the adsorption of lithium polysulfides by enhancing the chemical binding [42][43][44][45][46][47][48][49]. Unfortunately, unsatisfied electrical conductivity of most metal oxides and sulfides is detrimental to the kinetics of sulfur electrochemical conversion, leading to poor cycling performance and low sulfur utilization, as well as poor rate capability [50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Lotus Root-Like Nitrogen-Doped Carbon Nanofiber Structure Assembled with VN Catalysts as a Multifunctional Host for Superior Lithium–Sulfur Batteries

et al. 2019

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Lithium–sulfur batteries (LSBs) are regarded as one of the most promising energy-recycling storage systems due to their high energy density (up to 2600 Wh kg−1), high theoretical specific capacity (as much as 1672 mAh g−1), environmental friendliness, and low cost. Originating from the complicated redox of lithium polysulfide intermediates, Li–S batteries suffer from several problems, restricting their application and commercialization. Such problems include the shuttle effect of polysulfides (Li2Sx (2 < x ≤ 8)), low electronic conductivity of S/Li2S/Li2S2, and large volumetric expansion of S upon lithiation. In this study, a lotus root-like nitrogen-doped carbon nanofiber (NCNF) structure, assembled with vanadium nitride (VN) catalysts, was fabricated as a 3D freestanding current collector for high performance LSBs. The lotus root-like NCNF structure, which had a multichannel porous nanostructure, was able to provide excellent (ionically/electronically) conductive networks, which promoted ion transport and physical confinement of lithium polysulfides. Further, the structure provided good electrolyte penetration, thereby enhancing the interface contact with active S. VN, with its narrow resolved band gap, showed high electrical conductivity, high catalytic effect and polar chemical adsorption of lithium polysulfides, which is ideal for accelerating the reversible redox kinetics of intermediate polysulfides to improve the utilization of S. Tests showed that the VN-decorated multichannel porous carbon nanofiber structure retained a high specific capacity of 1325 mAh g−1 after 100 cycles at 0.1 C, with a low capacity decay of 0.05% per cycle, and demonstrated excellent rate capability.

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“…In the case of S, the peak with binding energy of 162.4 eV is related to Co−S bond (Figure 3e) [35] . Two peaks at 163.3 and 164.2 eV can be assigned to C−S 2p 3/2 and C−S 2p 1/2 , [36] while the other two peaks with binding energy of 168.8 and 169.9 eV are ascribed to S−O 2p 3/2 and S−O 2p 1/2 [37] . Nitrogen adsorption‐desorption isotherm measurement is performed to probe pore structure and specific surface area of Si@C−Co 9 S 8 /C.…”

Section: Resultsmentioning

confidence: 97%

“…[35] Two peaks at 163.3 and 164.2 eV can be assigned to CÀ S 2p 3/2 and CÀ S 2p 1/ 2 , [36] while the other two peaks with binding energy of 168.8 and 169.9 eV are ascribed to SÀ O 2p 3/2 and SÀ O 2p 1/2 . [37] Nitrogen adsorption-desorption isotherm measurement is performed to probe pore structure and specific surface area of Si@CÀ Co 9 S 8 /C. As illustrated in Figure 3f, Si@CÀ Co 9 S 8 /C displays a typical type IV adsorption-desorption isotherm with an H3type hysteresis loop, suggesting the presence of mesopores in Si@CÀ Co 9 S 8 /C.…”

Section: Morphology and Structure Characterizationmentioning

confidence: 99%

A Nanocomposite of Si@C Nanosphere and Hollow Porous Co₉S₈/C Polyhedron as High‐Performance Anode for Lithium‐Ion Battery

Yuan

et al. 2020

ChemElectroChem

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Silicon (Si) is regarded as one of the most promising anode materials for lithium-ion batteries (LIBs) due to its high capacity and low working voltage. However, dramatic volume expansion and inferior electrical conductivity greatly impede the commercial use of Si anodes. Herein, we design and synthesize a novel nanocomposite of Si nanosphere coated by carbon (Si@C) and hollow porous Co 9 S 8 /C polyhedron (Si@CÀ Co 9 S 8 /C). The hollow porous Co 9 S 8 /C derived from Co-based zeolitic imidazolate framework can serve as a buffering matrix to accommodate the volume expansion of Si, which is beneficial to improve the cycle performance. The vast conductive carbon layer originated from Co 9 S 8 /C and Si@C plays a key role in accelerating the electron transfer and lithium ion transport kinetics, which can significantly enhance the rate performance. As a result, the Si@CÀ Co 9 S 8 /C anodes deliver stable cycle performance with a reversible capacity of 1399 mA h g À 1 after 200 cycles at 100 mA g À 1 , improved rate performance and high Coulombic efficiency. This simple route sheds light on designing Si-based composites for LIBs anodes.

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Synergistic stabilizing lithium sulfur battery via nanocoating polypyrrole on cobalt sulfide nanobox

Cited by 45 publications

References 47 publications

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Lotus Root-Like Nitrogen-Doped Carbon Nanofiber Structure Assembled with VN Catalysts as a Multifunctional Host for Superior Lithium–Sulfur Batteries

A Nanocomposite of Si@C Nanosphere and Hollow Porous Co₉S₈/C Polyhedron as High‐Performance Anode for Lithium‐Ion Battery

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Synergistic stabilizing lithium sulfur battery via nanocoating polypyrrole on cobalt sulfide nanobox

Cited by 45 publications

References 47 publications

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Lotus Root-Like Nitrogen-Doped Carbon Nanofiber Structure Assembled with VN Catalysts as a Multifunctional Host for Superior Lithium–Sulfur Batteries

A Nanocomposite of Si@C Nanosphere and Hollow Porous Co9S8/C Polyhedron as High‐Performance Anode for Lithium‐Ion Battery

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A Nanocomposite of Si@C Nanosphere and Hollow Porous Co₉S₈/C Polyhedron as High‐Performance Anode for Lithium‐Ion Battery