Tri-Functional Copper Sulfide as Sulfur Carrier for High-Performance Lithium-Sulfur Batteries

He, Deqing; Xue, Pan; Song, Dongdong; Qu, Jie; Lai, Chao

doi:10.1149/2.0871707jes

Cited by 22 publications

(12 citation statements)

References 31 publications

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“…A microporous carbon support with Cu nanoparticles has been tested as S host in a Li–S battery, which enabled to maintain a specific capacity of 600 mAh g −1 after 500 cycles in ether‐based electrolyte . X‐ray absorption spectroscopy (XAS) studies have indicated that the reaction between metallic Cu and polysulfides to generate Cu x S and the higher binding energies of Cu x S toward Li 2 S x , together improve S utilization in Li–S batteries …”

Section: Introductionmentioning

confidence: 99%

Carbonized‐MOF as a Sulfur Host for Aluminum–Sulfur Batteries with Enhanced Capacity and Cycling Life

Guo

Jin

et al. 2019

Adv Funct Materials

120

145

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The rechargeable aluminum-sulfur (Al-S) battery is a promising next generation electrochemical energy storage system owing to its high theoretical capacity of 1672 mAh g −1 and in combining low-cost and naturally abundant elements, Al and S. However, to date, its poor reversibility and low lifespan have limited its practical application. In this paper, a composite cathode is reported for Al-S batteries based on S anchored on a carbonized HKUST-1 matrix (S@HKUST-1-C). The S@HKUST-1-C composite maintains a reversible capacity of 600 mAh g −1 at the 75th cycle and a reversible capacity of 460 mAh g −1 at the 500th cycle under a current density of 1 A g −1 , with a Coulombic efficiency of around 95%. X-ray diffraction and Auger spectrum results reveal that the Cu in HKUST-1 forms S-Cu ionic clusters. This serves to facilitate the electrochemical reaction and improve the reversibility of S during charge/discharge. Additionally, Cu increases the electron conductivity at the carbon matrix/S interface to significantly decrease the kinetic barrier for the conversion of sulfur species during battery operation.

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Section: Introductionmentioning

confidence: 99%

Carbonized‐MOF as a Sulfur Host for Aluminum–Sulfur Batteries with Enhanced Capacity and Cycling Life

Guo

Jin

et al. 2019

Adv Funct Materials

120

145

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“…The peak presented at 932.1 eV belongs to Cu + species in Cu‐N, or from Cu 2 S . And the high‐resolution S 2p XPS spectrum is shown in Figure i; the peaks located at 160.7 and 161.2 eV correspond to the SCu bond from the mixed‐phase of CuS and Cu 2 S and further explains the confinement of sulfur through chemical affects. The peaks at binding energies of 163.1, 164.3, and 167.8 eV are ascribed to S 2p 3/2 , S 2p 1/2 , and the sulfate species, respectively .…”

Section: Resultsmentioning

confidence: 96%

“…The content of sulfur in the Cu x S@NC/S‐F, Cu x S‐NC/S, and NC/S‐F composite estimated from TGA in N 2 is 80, 80, and 88.6 wt%, respectively (Figure S5b, Supporting Information). The second weight loss of 2.3 wt% between 310 and 440 °C is mainly attributed to the phase transformation of CuS to Cu 2 S and sulfur . Thus, the weight fraction of CuS and Cu 2 S in the Cu x S‐containing composites is calculated to be about 13.8 and 2.1 wt%, respectively.…”

Section: Resultsmentioning

confidence: 97%

“…It shows the relatively clear graphitic fringes, and the high crystallinity was revealed by the FFT pattern (inset of Figure e). In addition, the lattice distance of 0.30, 0.27, and 0.28 nm (Figure f) corresponds to the (400), (006), and (044) planes of Cu 2 S, CuS, and sulfur, respectively . Discrete spots in the FFT pattern may be due to the existence of Cu x S. The Raman spectrum of the Cu@NC‐F and NC‐F composites (Figure S4a, Supporting Information) show the lower ratio ( I D / I G ) and the higher intensity of 2D peak at 2798 cm −1 of Cu@NC‐F, revealing a higher degree of graphitization of carbon, which agrees with the HRTEM image in Figure e, suggesting the formation of graphitic carbon via the catalytic effect, since some studies have reported that Cu can promote the graphitization of carbon at a high temperature under H 2 .…”

Section: Resultsmentioning

confidence: 99%

“…With regard to nitrogen doping, it not only increases the conductivity and electrochemistry active sites but also results in a LiN bond to anchor LiPSs during the conversion reaction . Additionally, some metal particles (Fe, Cu) in situ oxidized to metal sulfide by Li 2 S x also exhibit the ability to chemically adsorb soluble sulfur species . Regarding Cu, the reaction between Cu and S occurring at a medium temperature to stabilize S has been reported in some published studies of Li–S batteries .…”

Section: Introductionmentioning

confidence: 99%

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In Situ Formation of Copper‐Based Hosts Embedded within 3D N‐Doped Hierarchically Porous Carbon Networks for Ultralong Cycle Lithium–Sulfur Batteries

Luo

et al. 2018

Adv Funct Materials

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Lithium-sulfur (Li-S) batteries are promising energy storage systems due to their large theoretical energy density of 2600 Wh kg −1 and cost effectiveness. However, the severe shuttle effect of soluble lithium polysulfide intermediates (LiPSs) and sluggish redox kinetics during the cycling process cause low sulfur utilization, rapid capacity fading, and a low coulombic efficiency. Here, a 3D copper, nitrogen co-doped hierarchically porous graphitic carbon network developed through a freeze-drying method (denoted as 3D Cu@ NC-F) is prepared, and it possesses strong chemical absorption and electrocatalytic conversion activity for LiPSs as highly efficient sulfur host materials in Li-S batteries. The porous carbon network consisting of 2D cross-linked ultrathin carbon nanosheets provides void space to accommodate volumetric expansion upon lithiation, while the Cu, N-doping effect plays a critical role for the confinement of polysulfides through chemical bonding. In addition, after sulfuration of Cu@NC-F network, the in situ grown copper sulfide (Cu x S) embedded within Cu x S@NC/S-F composite catalyzes LiPSs conversion during reversible cycling, resulting in low polarization and fast redox reaction kinetics. At a current density of 0.1 C, the Cu x S@NC/S-F composites' electrode exhibits an initial capacity of 1432 mAh g −1 and maintains 1169 mAh g −1 after 120 cycles, with a coulombic efficiency of nearly 100%. development of advanced energy storage systems. Li-S batteries have been considered a new generation energy storage system because of their high theoretical energy density of 2600 Wh kg −1 and theoretical specific capacity of 1675 mAh g −1 , [1] and the merits of safe, low-cost and nonpolluting also make these batteries an exceptional storage system. To date, researchers' knowledge of boosting the energy density of Li-S batteries has resulted in an increase in energy density to 500 Wh kg −1 or more. However, a series of problems inherent in Li-S batteries remain unsolved, such as the low conductivity of sulfur (5 × 10 −30 S cm −1 at 25 °C) and its discharge products (Li 2 S/Li 2 S 2 ), [2] the solubility and shuttle effect of long-chain LiPS intermediates (Li 2 S n , 4 ≤ n ≤ 8), and large volume expansion of ≈80% cause low sulfur utilization, rapid capacity fading, and poor rate-performance and low coulombic efficiency, which still limit practical applications of Li-S batteries. [3,4] At the current stage of Li-S battery research, research has been concentrated on reducing the shuttle effect by advancing electrolyte additives, [5] optimizing cathode structures, [6] using modified separators or bifunctional interlayers, [7,8] and devising protective anode structures, [9] to enable sufficient protection and Lithium-Sulfur BatteriesThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.

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Recent Advances in Non‐Carbon Dense Sulfur Cathodes for Lithium–Sulfur Battery with High Energy Density

Phuong Nguyen,

Lee

2024

ChemElectroChem

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The seemingly advantageous features of carbon‐based materials, such as large pore volume and lightweight structure, could actually lead to low tap density for the sulfur cathode and excessive electrolyte consumption, potentially significantly decreasing the energy density of lithium–sulfur battery. Recently, non‐carbon‐based materials composed of inorganic matter have emerged as promising candidates for creating dense sulfur cathodes and reducing electrolyte intake. Additionally, inorganic matter exhibits strong interactions with lithium polysulfides, which can address the intrinsic problems of the severe shuttling effect and poor reaction kinetics. In this review, we first discuss the relationship between the tap density of the sulfur cathode and the energy density of lithium–sulfur battery. Subsequently, we systematically summarize recent advances in non‐carbon‐based materials as sulfur hosts. Finally, we propose future research directions and perspectives for sulfur host materials to inspire the realization of practical lithium–sulfur battery with high energy density.

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Tri-Functional Copper Sulfide as Sulfur Carrier for High-Performance Lithium-Sulfur Batteries

Cited by 22 publications

References 31 publications

Carbonized‐MOF as a Sulfur Host for Aluminum–Sulfur Batteries with Enhanced Capacity and Cycling Life

Carbonized‐MOF as a Sulfur Host for Aluminum–Sulfur Batteries with Enhanced Capacity and Cycling Life

In Situ Formation of Copper‐Based Hosts Embedded within 3D N‐Doped Hierarchically Porous Carbon Networks for Ultralong Cycle Lithium–Sulfur Batteries

Recent Advances in Non‐Carbon Dense Sulfur Cathodes for Lithium–Sulfur Battery with High Energy Density

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