CoP@C with chemisorption-catalysis effect toward lithium polysulfides as multifunctional interlayer for high-performance lithium-sulfur batteries

Liu, Lie; Li, Yikai; Zhang, Yinggan; Qiao, Zhensong; Lin, Lin; Yan, Xiaolin; Meng, Zhaohui; Huang, Youzhang; Lin, Jie; Wang, Laisen; Sa, Biswanath; Xie, Qingshui; Peng, Dong‐Liang

doi:10.1016/j.electacta.2022.140391

Cited by 10 publications

(4 citation statements)

References 58 publications

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“…Further, the TEM image [Figure 1D] of the aCoP@CNTs suggests that the CNTs with a diameter of ~10 nm are closely combined with the interface of amorphous CoP and formed a highly conductive network. More significantly, no obvious lattice fringe appears in the lattice-resolved high-resolution TEM images of aCoP@CNTs [Figure 1F], further proving the successful preparation of amorphous CoP [44] . cCoP@CNTs maintains a similar structure to aCoP@CNTs [Figure 1E], while the crystalline properties of CoP are affirmed by its clear lattice stripes [Figure 1G].…”

Section: Resultsmentioning

confidence: 93%

Accelerating redox kinetics by ZIF-67 derived amorphous cobalt phosphide electrocatalyst for high-performance lithium-sulfur batteries

2023

Energy Mater

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The feasibility of the commercialization of lithium-sulfur (Li-S) batteries is troubled by sluggish redox conversion kinetics and the shuttle effect of polysulfides. Herein, a zeolitic imidazolate framework derived amorphous CoP combined with carbon nanotubes conductive network composites (aCoP@CNTs) has been synthesized as an effective dual-electrocatalyst for accelerating the redox kinetics of polysulfides to prolong the lifespan of Li-S batteries. Compared with crystalline CoP, unsaturated Co atoms of aCoP@CNTs exhibit stronger chemical adsorption capacity for polysulfides and serve as catalytic centers to accelerate the conversion from soluble polysulfides to solid-state lithium sulfide. Meanwhile, the 3D porous conductive network not only facilitates ion/electron transportation but also forms a physical barrier to limit the migration of polysulfides. Benefiting from the above preponderances, the batteries with aCoP@CNTs modified interlayer exhibited excellent cycle stability (initial discharge capacity of 1227.9 mAh g-1 at 0.2 C), rate performance (795.9 mAh g-1 at 2.5 C), long-term cycle reliability (decay rate of 0.049% per cycle at 1 C over 1000 cycles), and superior high-loading performance (high initial discharge capacity of 886 mAh g-1 and 753.6 mAh g-1 at 1 C under high S loading of 3 mg cm-2 and 4 mg cm-2).

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Section: Resultsmentioning

confidence: 93%

Accelerating redox kinetics by ZIF-67 derived amorphous cobalt phosphide electrocatalyst for high-performance lithium-sulfur batteries

2023

Energy Mater

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“…As shown in Figure 20 a–k, By using a straightforward coprecipitate technique, Peng et al [ 148 ] implanted CoP nanoparticles into porous C spheres (CoP@C). CoP@C had an SAA of 128.4 m 2 g −1 , a large number of active sites to improve LiPSs chemisorption, and CoP had strong electrocatalytic activity, which could reduce the conversion energy barrier and, ultimately, promote the kinetics of LiPSs transformation.…”

Section: Mcbm For Lithium-sulfur Batteriesmentioning

confidence: 99%

“…( i ) The optical images of the CoP@C-containing Li 2 S 6 solution adsorption experiments. The adsorption energies of the S-containing substance on ( j ) Co (111) and ( k ) CoP (211) [ 148 ]. ( l ) SEM and EDS mapping showed how the ACNF interlayer captured LiPSs.…”

Section: Figurementioning

confidence: 99%

Mesoporous Carbon-Based Materials for Enhancing the Performance of Lithium-Sulfur Batteries

Wang

Han

Feng

et al. 2023

IJMS

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The most promising energy storage devices are lithium-sulfur batteries (LSBs), which offer a high theoretical energy density that is five times greater than that of lithium-ion batteries. However, there are still significant barriers to the commercialization of LSBs, and mesoporous carbon-based materials (MCBMs) have attracted much attention in solving LSBs’ problems, due to their large specific surface area (SSA), high electrical conductivity, and other unique advantages. The synthesis of MCBMs and their applications in the anodes, cathodes, separators, and “two-in-one” hosts of LSBs are reviewed in this study. Most interestingly, we establish a systematic correlation between the structural characteristics of MCBMs and their electrochemical properties, offering recommendations for improving performance by altering the characteristics. Finally, the challenges and opportunities of LSBs under current policies are also clarified. This review provides ideas for the design of cathodes, anodes, and separators for LSBs, which could have a positive impact on the performance enhancement and commercialization of LSBs. The commercialization of high energy density secondary batteries is of great importance for the achievement of carbon neutrality and to meet the world’s expanding energy demand.

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“…Although porous carbon materials exhibit physical adsorption to polysulfide and inferior the 'shuttle effect' to some extent, the weak physical adsorption can only reduce the diffusion rate of polysulfide, and some polysulfide is still dissolved in the electrolyte, leading to poor cycling stability [25]. Recently, introducing polar material (metal sulfides [26], metal oxides [27], metal nitrides [28], and so on [29,30]) into cathode material to strengthen the chemisorption of polysulfide has been received widely investigated. Among these polar compounds, SnS 2 stands out because of the enhanced chemical absorption interaction with polysulfide and the unique catalyst property, which can accelerate the transformation of long-chain polysulfides to Li 2 S/Li 2 S 2 and promote the kinetics of chemical reactions [31,32].…”

Section: Introductionmentioning

confidence: 99%

Construction of SnS₂-modified multi-hole carbon nanofibers with sulfur encapsulated as free-standing cathode electrode for lithium sulfur battery

Liu,

Li,

Yang

et al. 2024

Nanotechnology

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Lithium-sulfur (Li-S) batteries exhibit a huge potential in energy storage devices for the thrilling theoretical energy density (2600 Wh kg-1). Nevertheless, the serious shuttle effect rooted in polysulfides and retardative hysteresis reaction kinetics results in inferior cycling and rate performances of Li-S batteries, impeding commercial applications. In order to further promote the energy storage abilities of Li-S batteries, a unique binder-free sulfur carrier consisting of SnS2-modified multi-hole carbon nanofibers (SnS2-MHCNFs) has been constructed, where MHCNFs can offer abundant space to accommodate high-level sulfur and SnS2 can promote the adsorption and catalyst capability of polysulfides, synergistically promoting the lithium-ion storage performances of Li-S batteries. After sulfur loading (SnS2-MHCNFs@S), the material was directly applied as a cathode electrode of the Li-S battery. The SnS2-MHCNFs@S electrode maintained a good discharge capacity of 921 mAh g-1 after 150 cycles when the current density was 0.1 C (1 C=1675 mA g-1), outdistancing the MHCNFs@S (629 mAh g-1) and CNFs@S (249 mAh g-1) electrodes. Meanwhile, the SnS2-MHCNFs@S electrode still exhibited a discharge capacity of 444 mAh g-1 at 2 C. The good performance of SnS2-MHCNFs@S electrode indicates that combining multihole structure designation and polar material modification are highly effective methods to boost the performances of Li-S batteries.

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CoP@C with chemisorption-catalysis effect toward lithium polysulfides as multifunctional interlayer for high-performance lithium-sulfur batteries

Cited by 10 publications

References 58 publications

Accelerating redox kinetics by ZIF-67 derived amorphous cobalt phosphide electrocatalyst for high-performance lithium-sulfur batteries

Accelerating redox kinetics by ZIF-67 derived amorphous cobalt phosphide electrocatalyst for high-performance lithium-sulfur batteries

Mesoporous Carbon-Based Materials for Enhancing the Performance of Lithium-Sulfur Batteries

Construction of SnS₂-modified multi-hole carbon nanofibers with sulfur encapsulated as free-standing cathode electrode for lithium sulfur battery

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CoP@C with chemisorption-catalysis effect toward lithium polysulfides as multifunctional interlayer for high-performance lithium-sulfur batteries

Cited by 10 publications

References 58 publications

Accelerating redox kinetics by ZIF-67 derived amorphous cobalt phosphide electrocatalyst for high-performance lithium-sulfur batteries

Accelerating redox kinetics by ZIF-67 derived amorphous cobalt phosphide electrocatalyst for high-performance lithium-sulfur batteries

Mesoporous Carbon-Based Materials for Enhancing the Performance of Lithium-Sulfur Batteries

Construction of SnS2-modified multi-hole carbon nanofibers with sulfur encapsulated as free-standing cathode electrode for lithium sulfur battery

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Construction of SnS₂-modified multi-hole carbon nanofibers with sulfur encapsulated as free-standing cathode electrode for lithium sulfur battery