Effective polysulfide adsorption and catalysis by polyoxometalate contributing to high-performance Li–S batteries

Song, Jian; Jiang, Yuanyuan; Lu, Yizhong; Wang, Mingliang; Cao, Yun-Dong; Fan, Linlin; Liu, Hong; Gao, Guanggang

doi:10.1016/j.mtnano.2022.100231

Cited by 16 publications

(10 citation statements)

References 50 publications

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“…15–19 In recent years, the application of POMs has been extended to LSB systems to conquer the shuttle effect. According to previous reports, 20,21 it can be concluded that W-containing POMs present appropriate redox potentials that cover the range of equilibrium potentials of sulfur redox reactions, and thus are more conducive to enhancing the electrochemical property of LSBs. Notably, when bulk POMs are utilized as the sulfur-fixing materials, the inevitable agglomeration will bury the effective active sites of POMs so as to limit their adsorption or catalysis function for LiPSs.…”

Section: Introductionmentioning

confidence: 80%

Graphene-supported polyoxometalate entrapped in a MIL-88A network with highly efficient conversion of polysulfides in Li–S batteries

et al. 2022

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Section: Introductionmentioning

confidence: 80%

Graphene-supported polyoxometalate entrapped in a MIL-88A network with highly efficient conversion of polysulfides in Li–S batteries

et al. 2022

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“…For example, Su and Manthiram reported that the microporous carbon paper between the cathode and separator can significantly improve not only the active materials utilization but also the capacity retention by decreasing the internal charge transfer resistance and localizing the soluble LiPSs. Metals, oxides, , nitrides, , carbides, and sulfides − can act as active sites for chemical adsorption and electrochemical catalysis of LiPSs. A metal nanoparticles composite with a conductive matrix can help in trapping the soluble LiPSs and enhancing the redox reaction kinetics by improving the ion transfer rate .…”

Section: Introductionmentioning

confidence: 99%

In Situ Trapping Strategy Enables a High-Loading Ni Single-Atom Catalyst as a Separator Modifier for a High-Performance Li–S Battery

Sun

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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The poor electrochemical reaction kinetics of Li polysulfides is a key barrier that prevents the Li−S batteries from widespread applications. Ni single atoms dispersed on carbon matrixes derived from ZIF-8 are a promising type of catalyst for accelerating the conversion of active sulfur species. However, Ni favors a square-planar coordination that can only be doped on the external surface of ZIF-8, leading to a low loading amount of Ni single atoms after pyrolysis. Herein, we demonstrate an in situ trapping strategy to synthesize Ni and melamine-codoped ZIF-8 precursor (Ni-ZIF-8-MA) by simultaneously introducing melamine and Ni during the synthesis of ZIF-8, which can remarkably decrease the particle size of ZIF-8 and further anchor Ni via Ni−N 6 coordination. Consequently, a novel high-loading Ni single-atom (3.3 wt %) catalyst implanted in an N-doped nanocarbon matrix (Ni@NNC) is obtained after high-temperature pyrolysis. This catalyst as a separator modifier shows a superior catalytic effect on the electrochemical transitions of Li polysulfides, which endows the corresponding Li−S batteries with a high specific capacity of 1232.4 mA h g −1 at 0.3 C and an excellent rate capability of 814.9 mA h g −1 at 3 C. Furthermore, a superior areal capacity of 4.6 mA h cm −2 with stable cycling over 160 cycles can be achieved under a critical condition with a low electrolyte/sulfur ratio (8.4 μL mg −1 ) and high sulfur loading (4.85 mg cm −2 ). The outstanding electrochemical performances can be attributed to the strong adsorption and fast conversion of Li polysulfides on the highly dense active sites of Ni@NNC. This intriguing work provides new inspirations for designing high-loading single-atom catalysts applied in Li−S batteries.

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“…Carbon materials, inorganic compounds, and conductive polymers are the three general groups of matrix materials used for lithium-sulfur battery composites. 14,15 Graphene derivatives are carbon compounds with a single layer made up entirely of carbon atoms and massless Dirac fermions. 16 Graphene derivatives are efficient substrates for supporting sulfur in lithium-sulfur batteries due to their high specific surface area, strong electronic conductivity, mechanical characteristics, and superior chemical and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Mechanism and thermal effects of phytic acid-assisted porous carbon sheets for high-performance lithium–sulfur batteries

Cheng,

Liu,

Manasa

et al. 2023

Inorg. Chem. Front.

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Effective polysulfide adsorption and catalysis by polyoxometalate contributing to high-performance Li–S batteries

Cited by 16 publications

References 50 publications

Graphene-supported polyoxometalate entrapped in a MIL-88A network with highly efficient conversion of polysulfides in Li–S batteries

Graphene-supported polyoxometalate entrapped in a MIL-88A network with highly efficient conversion of polysulfides in Li–S batteries

In Situ Trapping Strategy Enables a High-Loading Ni Single-Atom Catalyst as a Separator Modifier for a High-Performance Li–S Battery

Mechanism and thermal effects of phytic acid-assisted porous carbon sheets for high-performance lithium–sulfur batteries

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