Sb nanosheet modified separator for Li–S batteries with excellent electrochemical performance

Zeng, Linchao; Zhu, Jianhui; Liu, Minsu; Zhang, Peixin

doi:10.1039/d0ra10100a

Cited by 5 publications

(3 citation statements)

References 52 publications

(64 reference statements)

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“…Figure 5(b) shows the S 2p spectrum, the peak of terminal sulfur (ST −1 ) at 161.3 eV and bridging sulfur (SB°) at 162.7 eV move to higher binding energy, indicating that the density of electron cloud on sulfur decreases after adsorption [48,49]. The new peaks at 167.4 and 169.1 eV can be attributed to the formation of thiosulfate and polythionate, respectively [50]. Meanwhile, (e) N 1s and (f) S 2p XPS spectra of COF@GO/S; SEM images of (g) COF/S, (h) COF@GO/S; TEM images of (i) COF@GO/S; (j) SEM element mappings of COF@GO/S.…”

Section: Resultsmentioning

confidence: 97%

Covalent organic framework wrapped by graphene oxide as an efficient sulfur host for high performance lithium–sulfur batteries

Yan

Zhao

et al. 2022

Nanotechnology

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The practical application of lithium-sulfur (Li-S) battery is seriously limited by the loss of active substances and the deterioration of cycle stability caused by the “shuttle effect” of lithium polysulfides (LiPSs). In this work, graphene oxide (GO) coated covalent organic framework (COF) compound materials were synthesized as sulfur host material in spray-drying process. The polar groups on COF can efficiently adsorb LiPSs through lithiophilic interaction, which can reduce the “shuttle effect” caused by soluble LiPSs. Besides, GO in the outer layer can wrap discrete sulfur to reduce the loss of active substances, which further improves the cycle stability of the cathode. The COF@GO/S cathode exhibits a high initial specific capacity of 848.4 mAh g-1 and retains a capacity of 601.1 mAh g-1 after 500 cycles at 1 C counting with a low capacity fading of 0.058% per cycle.

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Section: Resultsmentioning

confidence: 97%

Covalent organic framework wrapped by graphene oxide as an efficient sulfur host for high performance lithium–sulfur batteries

Yan

Zhao

et al. 2022

Nanotechnology

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“…S 2 p spectra shows the intrinsic bonds of S B 0 and S T −1 in Li 2 S 6 , which are located at 163.2 and 161.6 eV, respectively. [ 38,39 ] SMg peak at 166.3 eV and SC peak at 163.8 eV further indicates that MCN has strong surface affinity for LiPSs. [ 40 ] In the C 1 s spectra, the strongest peak located at 284.1 eV refers to the NCN bonds, and the COMg bonds and CO 3 2− bonds locate at 284.8 and 289.6 eV, [ 41 ] respectively.…”

Section: Resultsmentioning

confidence: 99%

Bidirectional Catalyst with Robust Lithiophilicity and Sulfiphilicity for Advanced Lithium–Sulfur Battery

Deng

Yang

et al. 2023

Adv Funct Materials

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The application of lithium–sulfur batteries (LSBs) is immensely impeded by notorious shuttle effect, sluggish redox kinetics, and irregular Li2S deposition, which result in large polarization and rapid capacity decay. To obtain the LSBs with high energy density and fast reaction kinetics, herein, a heterostructure composed by nitrogen‐deficient graphitic carbon nitride (ND‐g‐C3N4) and MgNCN is fabricated via a magnesiothermic denitriding technology. Lithophilic C3N4 with abundant nitrogen‐deficient acts as a conductive framework, together with the sulfiphilic MgNCN, lithium‐polysulfides (LiPSs) can be effectively captured followed by a regulated Li2S nucleation. Furthermore, the oxidation conversion kinetics can be accelerated as well. As expected, the LSBs with catalytic MgNCN/ND‐g‐C3N4 as the interlayer exhibit remarkable electrochemical performance with a discharge capacity of 650 mAh g−1 at 4 C. Meanwhile, a low capacity decay of 0.008% per cycle can be reached at 1 C after 400 cycles. Even with a high areal sulfur loading of 5.1 mg cm−2, outstanding capacity retention can be achieved at 0.5 C (64.18%) and 1 C (90.46%). The presented strategy unlocks a new way for the LSBs design with highly efficient catalyst.

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“…1.0 m LiTFSI in 1:1 DOL and DME with 0.1 m LiNO 3 [29] Sb Nanosheets SbNs 997.7 mAh g -1 at 0.1 A g -1 423 mAh g -1 at 1 A g -1.0 m LiTFSI in 1:1 DME: DOL and 1 wt% LiNO 3 [30] Fluorinated covalent organic polymer…”

Section: Li-s Batteriesmentioning

confidence: 99%

Catalytic Effects of Electrodes and Electrolytes in Metal–Sulfur Batteries: Progress and Prospective

et al. 2022

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Sb nanosheet modified separator for Li–S batteries with excellent electrochemical performance

Abstract: Antimony nanosheet modified separator is prepared for high performance Li–S batteries for the first time.

Cited by 5 publications

References 52 publications

Covalent organic framework wrapped by graphene oxide as an efficient sulfur host for high performance lithium–sulfur batteries

Covalent organic framework wrapped by graphene oxide as an efficient sulfur host for high performance lithium–sulfur batteries

Bidirectional Catalyst with Robust Lithiophilicity and Sulfiphilicity for Advanced Lithium–Sulfur Battery

Catalytic Effects of Electrodes and Electrolytes in Metal–Sulfur Batteries: Progress and Prospective

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