Optimized Assembly of Micro-/Meso-/Macroporous Carbon for Li–S Batteries

Tang, Qiong; Li, Heqin; Zuo, Min; Zhang, Jing; Huang, Yiqin; Bai, P.; Xu, Jiaqi; Zhou, Ke

doi:10.1142/s1793292017500217

Cited by 27 publications

(7 citation statements)

References 40 publications

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“…In order to obtain excellent electrode materials for LSBs, the micro‐/meso‐/macroporous carbon material was synthesized successfully by a facile method with CaCO 3 as a hard template. Meanwhile, Tang and their coworkers explored the effect of total pore volume, specific surface area (SSA) and pore size distribution of porous carbon on the electrochemical performance of LSBs. They found that the pore size distribution influences substantially the electrochemical performance of LSBs rather than the total pore volume and SSA in the same sulfur content.…”

Section: Porous Carbonsmentioning

confidence: 99%

Review of Carbon Materials for Lithium‐Sulfur Batteries

et al. 2018

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Lithium‐sulfur battery as one of the most promising and attractive candidate among the emerging electrical energy storage has attracted enormous attentions. It has superior characteristics of high specific energy density (2600 Wh kg−1) and high theoretical specific capacity (1675 mAh g−1), which is equal to 3–5 times of lithium‐ion batteries, and more closed to the requirement of the pure electric vehicles and hybrid electric vehicles. Furthermore, sulfur element is inexpensive, naturally abundant, and environmentally friendly. However, the commercial application of lithium‐sulfur batteries (LSBs) still faces some major technical obstacles such as the low electrical conductivity of sulfur, the shuttle effect of polysulfides, and the drastic volume expansion during charge/discharge process. In this review paper, we focus on some of the effective strategies in boosting the electrochemical performance of LSBs through the development of sulfur/carbon composite electrode materials, including the use of porous carbons, carbon nanotubes/fibers, and graphene. The integration of carbon materials and sulfur can efficiently improve the utilization of active materials, enhance the conductivity of cathode materials, and provide a polysulfides barrier. Simultaneously, the challenges and prospects on LSBs in the near future are also presented and discussed.

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Section: Porous Carbonsmentioning

confidence: 99%

Review of Carbon Materials for Lithium‐Sulfur Batteries

et al. 2018

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“…In principle, it is critical to prepare a well-defined raw active material before the cathode fabrication in Li–S battery research, − such as the sulfur/carbon ratio (S/C ratio) and mixture distribution, which were more important. − Therefore, many previous experiments have been conducted to optimize such important parameters. In our research, we chose a high sulfur/carbon (S/C ratio equals 4/1) mixture as the active material, which was prepared by a hot melting approach.…”

Section: Resultsmentioning

confidence: 99%

Ion Channel Engineering in Super Thick Cathodes toward High-Energy-Density Li–S Batteries

Zhang

Song

et al. 2022

Energy Fuels

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The lithium–sulfur (Li–S) battery has been expected to be the most promising next-generation energy storage device. Aiming to fabricate a high-energy-density Li–S battery, numerous approaches have been devoted to primarily increase the sulfur loading of cathodes. However, it is unavoidable that the cathode with an increasing sulfur loading will be increasingly thicker, causing severe electrolyte transportation problems that compromise the advantages of thick cathodes. Herein, we propose a novel NaCl template-assisted pore generation strategy to solve the above problem within thick cathodes. The pathway of electrolyte transportation in thick cathodes with a superhigh sulfur loading of more than 20 mg/cm2 is effectively generated, and the resultant Li–S primary battery delivers an unexpectedly high specific capacity of 1346 mA h/g. The overall mass and volume energy densities of the pouch cell are 614.96 W h/kg and 923.00 W h/L, respectively, outdoing the values of its counterparts. The high performance of our advanced Li–S primary battery is well attributed to the favorable microarchitecture of thick cathodes with abundant pores, which act as ion channels and allow electrolytes to penetrate through easily, assuring the fast Li ion transfer. Our findings provide an outstanding avenue for the high-mass-loading cathode design of Li–S batteries to remarkably enhance their practicable energy density.

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“…Tang et al proposed the concept of hierarchically porous carbon using the hard template method to prepare a carbon material with all micro/meso/macropores. 20 The study found that the higher the micropore volume percentage in graded porous carbon, the better the specific performance obtained by the LSB. Li after the carbonization of polyacrylonitrile (PAN), it was doped with nitrogen atoms and exhibited excellent chemisorption for Li + .…”

Section: ■ Introductionmentioning

confidence: 94%

Thiophilic–Lithiophilic Hierarchically Porous Membrane-Enabled Full Lithium–Sulfur Battery with a Low N/P Ratio

Jiang

et al. 2022

ACS Appl. Mater. Interfaces

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Lithium−sulfur batteries stand out as the next-generation batteries because of their high energy density and low cost. However, the shuttle effect of lithium polysulfides (LiPSs), growth of lithium dendrites, and overuse of lithium resources still hinder their further application. To address these problems, we constructed a porous network structure in which Sn is melted and coated on a frame that has a carbon nanotube (CNT) core and a nitrogendoped carbon (NC) coating as cross-linking shell (CNT@NC@Sn). This hierarchically porous membrane electrode, which has an ultrahigh porosity of approximately 90%, works as a matrix to strengthen the conductivity of Li + and electrons and provides enough space for the conversion between sulfur and LiPSs. Moreover, the in situ thin coating of Sn not only promotes the adsorption and catalytic conversion of LiPSs but also provides lithiophilic binding sites and induces uniform lithium deposition. Thus, the thiophilic−lithiophilic porous membrane electrode with lithium loaded on the frame (in the form of Sn−Li alloy) by electroplating can replace lithium sheets, reduce the use of Li, and improve the safety performance of the battery. Additionally, these dual-functional membranes boost the reaction kinetics and conductivity of the cathode by dispersing the sulfur slurry in the porous membrane framework. As a result, the lithium−sulfur full battery assembled with the CNT@NC@Sn integrated membrane electrode exhibits stable cycling with a reversible capacity of 617.1 mAh g −1 after 200 cycles at 1 C. The capacity decay rate per cycle is 0.105%, and the N/P ratio is as low as 2.98.

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Optimized Assembly of Micro-/Meso-/Macroporous Carbon for Li–S Batteries

Cited by 27 publications

References 40 publications

Review of Carbon Materials for Lithium‐Sulfur Batteries

Review of Carbon Materials for Lithium‐Sulfur Batteries

Ion Channel Engineering in Super Thick Cathodes toward High-Energy-Density Li–S Batteries

Thiophilic–Lithiophilic Hierarchically Porous Membrane-Enabled Full Lithium–Sulfur Battery with a Low N/P Ratio

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