Polysulfide Filter and Dendrite Inhibitor: Highly Graphitized Wood Framework Inhibits Polysulfide Shuttle and Lithium Dendrites in Li–S Batteries

Chen, Yuanzhen; Zou, Kunyang; Dai, Xin; Bai, Han; Zhang, Shilin; Zhou, Tengfei; Li, Chang-Jiu; Liu, Yongning; Pang, Wei; Guo, Zaiping

doi:10.1002/adfm.202102458

Cited by 51 publications

(29 citation statements)

References 77 publications

(78 reference statements)

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“…For example, we reported previously a 3D conductive carbon framework with graphitic microvilli in the tunnel by using pine wood, and found that abundant microvilli were beneficial to the immobilization of polysulfides because they could offer more active sites and enhance the reaction kinetic of Li–S battery. [ 31 ] To expand the scope of the application of our research results, another kind of 3D conductive carbon framework is filled with carbon nanotubes to further use the microchannel space. On the other hand, perovskite compounds with oxygen vacancies are used as catalysts in microchannels to accelerate the conversion of polysulfides.…”

Section: Resultsmentioning

confidence: 99%

Defect Engineering in a Multiple Confined Geometry for Robust Lithium–Sulfur Batteries

Zou

Zhou

Chen

et al. 2022

Advanced Energy Materials

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The decay of lithium–sulfur (Li–S) batteries is mainly due to the shuttle effect caused by intermediate polysulfides (LiPSs). Herein, a multiple confined cathode architecture is prepared by filling graphitized Pinus sylvestris with carbon nanotubes and defective LaNiO3−x (LNO‐V) nanoparticles. The composite electrode with high areal sulfur loading of 11.6 mg cm−2 shows a high areal specific capacity of 8.5 mAh cm−2 at 1 mA cm−2 (0.05 C). Both experimental results and theoretical calculations reveal that this unique structure not only provides physical restriction on LiPSs within microchannels but also offers strong chemical immobilization and catalytic conversion of LiPSs attributed to the spin density around oxygen vacancies of LaNiO3−x. These oxygen vacancies elongate the SS and LiS bonds and make them easy to break. Furthermore, the lengthwise channels derived from cytoderm restrict the transverse diffusion of polysulfides, leading to a uniform areal current and thus homogeneous lithium infiltration. This suppresses the corrosion of the lithium anode due to polysulfides confinement. The discovery of the multiple confined structure that provides chemical adsorption, fast diffusion, and catalytic conversion for polysulfides can broaden the application of biomass materials and offer a new strategy to achieve robust Li–S batteries.

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Section: Resultsmentioning

confidence: 99%

Defect Engineering in a Multiple Confined Geometry for Robust Lithium–Sulfur Batteries

Zou

Zhou

Chen

et al. 2022

Advanced Energy Materials

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“…Raman spectra (Figure 2b) display two peaks of D band (1346 cm −1 ) and G band (1578 cm −1 ) to reveal the amorphous structure and sp 2 ‐hybridized graphitic, respectively. [ 34 ] The intensity ratios of I D to I G are 0.99, 0.985, 0.98, 0.972 of the N/O‐HC700, N/O‐HC800, N/O‐HC900, N/O‐HC1000, respectively. These tiny changes can be assigned to the carbonization process in which graphitic carbon is easily formed at high temperatures.…”

Section: Resultsmentioning

confidence: 99%

A Highly Efficient Sulfur Host Enabled by Nitrogen/Oxygen Dual‐Doped Honeycomb‐Like Carbon for Advanced Lithium–Sulfur Batteries

Zou

Jing

Dai

et al. 2022

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High energy density and long cycle life of lithium–sulfur (Li–S) batteries suffer from the shuttle/expansion effect. Sufficient sulfur storage space, local fixation of polysulfides, and outstanding electrical conductivity are crucial for a robust cathode host. Herein, a modified template method is proposed to synthesize a highly regular and uniform nitrogen/oxygen dual‐doped honeycomb‐like carbon as sulfur host (N/O‐HC‐S). The unique structure not only offers physical entrapment for polysulfides (LiPSs) but also provides chemical adsorption and catalytic conversion sites of polysulfides. In addition, this structure offers enough space for loading sulfur, and a regular space of nanometer size can effectively prevent sulfur particles from accumulating. As expected, the as‐prepared N/O‐HC900‐S with high areal sulfur loading (7.4 mg cm−2) shows a high areal specific capacity of 7.35 mAh cm−2 at 0.2 C. Theoretical calculations also reveal that the strong chemical immobilization and catalytic conversion of LiPSs attributed to the spin density and charge distribution of carbon atoms will be influenced by the neighbor nitrogen/oxygen dopants. This structure that provides cooperative chemical adsorption, high lithium ions flux, and catalytic conversion for LiPSs can offer a new strategy for constructing a polysulfide confinement structure to achieve robust Li–S batteries.

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“…Plating lithium in porous current collectors, which mitigates the volume change of anode, physically suppresses dendrites growth, and provides more electrical contact between lithium and conductor than 2D current collectors, is popularly researched to enhance the performances of lithium anodes. [266][267][268] Compared to 2D plane copper current collector, 3D porous carbon materials are lighter and more chemically stable. 269 In addition, the high surface area of porous structures is advantageous in terms of lowering the local current density and thus prolonging Sand's time.…”

Section: Hcps For Stabilizing a Li-metal Anodementioning

confidence: 99%

Status and perspectives of hierarchical porous carbon materials in terms of high‐performance lithium–sulfur batteries

et al. 2022

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Lithium-sulfur (Li-S) batteries, although a promising candidate of nextgeneration energy storage devices, are hindered by some bottlenecks in their roadmap toward commercialization. The key challenges include solving the issues such as low utilization of active materials, poor cyclic stability, poor rate performance, and unsatisfactory Coulombic efficiency due to the inherent poor electrical and ionic conductivity of sulfur and its discharged products (e.g., Li 2 S 2 and Li 2 S), dissolution and migration of polysulfide ions in the electrolyte, unstable solid electrolyte interphase and dendritic growth on anodes, and volume change in both cathodes and anodes. Owing to the high specific surface area, pore volume, low density, good chemical stability, and particularly multimodal pore sizes, hierarchical porous carbon (HPC) materials have received considerable attention for circumventing the above problems in Li-S batteries. Herein, recent progress made in the synthetic methods and deployment of HPC materials for various components including sulfur cathodes, separators and interlayers, and lithium anodes in Li-S batteries is presented and summarized. More importantly, the correlation between the structures (pore volume, specific surface area, degree of pores, and heteroatom-doping) of HPC and the electrochemical performances of Li-S batteries is elaborated. Finally, a discussion on the challenges and future perspectives associated with HPCs for Li-S batteries is provided.

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Polysulfide Filter and Dendrite Inhibitor: Highly Graphitized Wood Framework Inhibits Polysulfide Shuttle and Lithium Dendrites in Li–S Batteries

Cited by 51 publications

References 77 publications

Defect Engineering in a Multiple Confined Geometry for Robust Lithium–Sulfur Batteries

Defect Engineering in a Multiple Confined Geometry for Robust Lithium–Sulfur Batteries

A Highly Efficient Sulfur Host Enabled by Nitrogen/Oxygen Dual‐Doped Honeycomb‐Like Carbon for Advanced Lithium–Sulfur Batteries

Status and perspectives of hierarchical porous carbon materials in terms of high‐performance lithium–sulfur batteries

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