JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 28
·期 7
·2413-2423
·
IF 2.5
Lu Chengwei,Yu Liyue,Zhou Xiaozheng,Gan Yongping,He Xinping,Huang Hui,Zhang Jun,Zhang Wenkui,Xia Xinhui,Xiao Zhen,Fang Ruyi,Xia Yang
Lithium sulfide (Li 2 S) is a promising alternative cathodic material for lithium–sulfur batteries, which can alleviate the volume expansion of sulfur‑based cathodes. As a fully lithiated cathode, Li 2 S can be paired with Li-free anodes, thereby increasing the selectivity of anodic materials. Nevertheless, Li 2 S cathode is hindered by its high cost, harsh preparation conditions, and inadequate conductivity, which impose limitations on its practical application. Hence, the crucial factor in enabling the practicality of Li 2 S cathode is the development of low-cost and facile synthetic methods to produce highly conductive Li 2 S material. Herein, a high‑conductivity Li 2 S@C/CNT composite cathode is prepared using low-cost Li 2 SO 4 as a lithium source through a facile spray drying technique combined with carbothermal reduction method. Benefiting from the high-speed three-dimensional pathway for electron transport provided by the in-situ formed botryoidal highly conductive network, the Li 2 S@C/CNT cathode exhibits ultrahigh initial discharge capacity (1028.5 mA h g − 1 @1 C), superior cycle stability (520.6 mA h g − 1 after 200 cycles), and remarkable rate capability (301.8 mA h g − 1 @5 C). This work not only presents a simple and feasible approach for the low-cost preparation of high‑performance Li 2 S cathode, but also proposes an innovative idea for advancing the development of high energy density lithium–sulfur batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 11
·16940-16957
·
IF 0
Lyu Shiqi,Abidin Zurina Zainal,Yaw Thomas Choong Shean,Resul Mohamad Faiz Mukhtar Gunam
The applications of polysulfides derived from natural plant oil and sulfur via the inverse vulcanization in the removal of heavy metals from aqueous solutions suffered from their low porosity and scarce surface functionality because of their hydrophobic surfaces and bulk characteristics. In this study, polysulfides from sulfur and palm oil (PSPs) with significantly enhanced porosity (13.7–24.1 m 2 /g) and surface oxygen-containing functional groups (6.9–8.6 wt.%) were synthesized with the optimization of process conditions including reaction time, temperature, and mass ratios of sulfur/palm oil/NaCl/sodium citrate. PSPs were applied as sorbents to remove heavy metals present in aqueous solutions. The integration of porosity and oxygen modification allowed a fast kinetic (4.0 h) and enhanced maximum sorption capacities for Pb(II) (218.5 mg/g), Cu(II) (74.8 mg/g), and Cr(III) (68.4 mg/g) at pH 5.0 and T 298 K comparing with polysulfides made without NaCl/sodium citrate. The sorption behaviors of Pb(II), Cu(II), and Cr(III) on PSPs were highly dependent on the solution pH values and ionic strength. The sorption presented excellent anti-interference capability for the coexisting cations and anions. The sorption processes were endothermic and spontaneous. This work would guide the preparation of porous polysulfides with surface modification as efficient sorbents to remediate heavy metals from aqueous solutions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
POLYMER SCIENCE SERIES B
·
2024
·Vol. 65
·期 6
·842-857
·
IF 1
Wanting Zhao,Su Qin,Lyu Ya
Abstract In this paper, tung oil-linseed oil (TO-LSO) and styrene-linseed oil (STY-LSO) were used as raw materials of sulfur-rich copolymers, which were then reversed vulcanized with S 8 at 130°C, and the gel time of the reaction was recorded. At the same time, 1 H NMR, DSC, XRD, sodium sulfite titration and other characterization methods were used to measure the reaction degree, verify the conjugated structure to improve the reaction degree, and study the synthesis mechanism of sulfur-rich copolymer. The results show that the conjugated structure can improve the reaction degree. And when the proportion of TO and STY is 20 and 10% respectively, the reaction gel time is shortened, the reaction degree is greatly deepened, and the effect of promoting polymerization can be significantly obtained. The synthesis mechanism of copolymer is the result of conjugated structure and diallyl group. The self-repair of sulfur-rich copolymers at different temperature and holding time by hot press shows that poly(20-TO-LSO-50S) can realize the S‒S bond self-repair after being compressed at 120°C for 4 h, and the surface of polymer disc was smoother and more uniform. However, poly(10STY-LSO-50S) can be repaired only after being compressed for 8 h. TO can not only enhance the synthesis process, but also enhance the performance of sulfur-rich materials and broaden the application field.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Small Methods
·
2021
·Vol. 6
·期 2
·2101402
·
IF 14.188
Hao Guo,Jing Hu,Huimin Yuan,Ningning Wu,Yingzhi Li,Guiyu Liu,Ning Qin,Kemeng Liao,Zhiqiang Li,Wen Luo,Shuai Gu,Weihua Wan,Bin Shi,Xusheng Xu,Qinghua Yang,Jiayuan Shi,Zhouguang Lu
Fabrication of a highly porous sulfur host and using excess electrolyte is a common strategy to enhance sulfur utilization. However, flooded electrolyte limits the practical energy density of Li–S pouch cells. In this study, a novel Fe 0.34 Co 0.33 Ni 0.33 S 2 (FCN) is proposed as host for sulfur to realize Ah-level Li–S full cells demonstrating excellent electrochemical performances under 2 µL mg −1 lean electrolyte conditions. Moreover, Kelvin probe force microscopy shows that the FCN surface contains positive charge with a potential of ≈70 mV, improving the binding of polysulfides through Lewis acid base interaction. In particular, the FCN@S possesses inherent electrochemical activity of simultaneous anionic and cationic redox for lithium storage in the voltage window of 1.8–2.1 V, which additionally contributes to the specific capacity. Due to the low carbon content (≈10 wt%), the sulfur loading is as high as ≈6 mg cm −2 , approaching an outstanding energy density of 394.9 and 267.2 Wh kg −1 at the current density of 1.5 and 4 mA cm −2 , respectively. Moreover, after 60 cycles at 1.5 mA cm −2 , the pouch cell still retains an energy of 300.2 Wh kg −1 . This study represents a milestone in the practical applications of high-energy Li–S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
固态离子学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Yufen Yan,Yayu Guo,Huadong Zheng,Liang Qi,Yutao Yang,Yanli Miao,Xixi Shi,Lianqi Zhang,Chunliang Li,Dawei Song
Development of sulfide solid-state electrolytes (SSEs) with high ionic conductivity plays a leading role in achieving all-solid-state sodium batteries (ASSSBs). As an important raw material for synthesizing sulfide SSEs, the purity of Na 2 S significantly affects the ionic conductivity and electrochemical properties of sulfide SSEs. In order to obtain high-purity and low-cost Na 2 S, a hydrogen reduction of industrial grade Na 2 SO 4 followed by ethanol purification has been successfully employed to synthesize and purify Na 2 S, which possesses a high purity of 98 %. Na 3 SbS 4 has been synthesized by as-synthesized Na 2 S (A-Na 2 S) and commercial Na 2 S (C–Na 2 S) by liquid-phase synthesis and solid-state reaction methods, respectively. The electrochemical properties indicate that Na 3 SbS 4 samples synthesized by A-Na 2 S possess higher ionic conductivity and lower Ea, and the assembled ASSSBs exhibit higher specific capacities, superior cycle and rate performance. At 0.5C, the assembled TiS 2 /Na 3 SbS 4 /NaSn ASSSB exhibits a high initial capacity of 211.4 mAh g −1 with capacity retention of 96.2 % after 360 cycles at room temperature. This work provides a simple approach for synthesizing high-purity Na 2 S at low cost, enabling the large-scale application of sulfide SSEs for ASSSBs.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源存储
·
无机合成
·
电池技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 13
·7897-7906
·
IF 10.733
Jingyi Wu,Xiongwei Li,Hongxia Zeng,Yang Xue,Fangyan Chen,Zhigang Xue,Yunsheng Ye,Xiaolin Xie
The polysulfide shuttle effect and sluggish reaction kinetics can severely reduce the sulfur utilization and cycle stability of Li–S batteries, undermining their use in practical applications. Herein, we design a core–shell nanocomposite by encapsulating radially oriented MoS2 nanosheets by porous nitrogen-doped carbon (MoS2@NC) via an eco-friendly method. The highly oriented MoS2 nanosheets in MoS2@NC avoid aggregation of the active sites for polysulfide adsorption, and the desirable integration of the catalytic MoS2 nanosheet core and a highly conductive carbon shell provides a constant flow of electrons to the captured polysulfides for improved polysulfide conversion kinetics. The combined benefits of high polysulfide inhibition and smooth electron and Li+ transfer by a thin layer of MoS2@NC (3.3 μm thick) enable a simple sulfur–carbon black cathode with high reversible capacities, good rate performances (876 mA h g−1 at 3C), an excellent cycle stability over 1500 cycles with a negligible 0.034% decay per cycle, and satisfactory areal capacities with increased sulfur loading (2.0–3.7 mA h cm−2 at various rates). This work provides a proof-of-concept study on the rational design of interlayer materials in energy storage systems.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Shengheng Nong,Dongyuan Huang,Yaoying Li,Ruoxi Yang,Jiawei Xie,Jia Li,Haifu Huang,Xianqing Liang,Guangxu Li,Zhiqiang Lan,Haizhen Liu,Dan Huang,Shuaikai Xu,Jin Guo,Wenzheng Zhou
Lithium–sulfur batteries have been researched extensively because of their high energy density and low price. However, the poor conductivity of sulfur, the shuttle effect of polysulfide, the slow redox kinetics of sulfur species, and the significant volume expansion and contraction during charging and discharging have hindered the commercial application of lithium–sulfur batteries. In this study, a simple, scalable, and cost-effective strategy was developed to control the balance of the porosity, specific surface area, graphitization , heteroatom co-doping, and polar-polar interactions of a biomass carbon source. With this strategy, multifunctional porous carbon materials with three-dimensional network structures were prepared to serve as sulfur-loading hosts with high specific surface area, strong adsorption activity, and good conductivity. Moreover, the optimal porous carbon material was directly coated on a commercial separator, and the modified separator was found to further improve the electrochemical performance of a lithium–sulfur battery . As a result, for the battery with GPCS-3 as cathode electrode and modified separator as separator, the initial discharge capacity at 1.0C is 926.2 mAh g −1 . After 300 cycles, the discharge capacity is 712.7 mAh g −1 , and the average capacity decay is only 0.077 % per cycle. Since the three-dimensional network structure material exhibits good performance as a sulfur-loading host as well as the ability to effectively modify a separator, this study provides a valuable strategy for the fabrication of high energy density lithium–sulfur batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
·
2017
·
IF 4.519
Junhui Li,Shan Li,Lufeng Yan,Tian Ding,Robert J. Linhardt,Yanlei Yu,Xinyue Liu,Donghong Liu,Xingqian Ye,Shiguo Chen
Fucosylated chondroitin sulfates (fCSs) are structurally unusual glycosaminoglycans isolated from sea cucumbers that exhibit potent anticoagulant activity . These fCSs were isolated from sea cucumber, Isostichopus badionotus and Pearsonothuria graeffei . Fenton reaction followed by gel filtration chromatography afforded fCS oligosaccharides , with different sulfation patterns identified by mass and NMR spectroscopy , and these were used to clarify the relationship between the structures and the anticoagulant activities of fCSs. In vitro activities were measured by activated partial thromboplastin time (APTT), thrombin time (TT), thrombin and factor Xa inhibition, and activation of FXII . The results showed that free radicals preferentially acted on GlcA residues affording oligosaccharides that were purified from both fCSs. The inhibition of thrombin and factor X activities, mediated through antithrombin III and heparin cofactor II of fCSs oligosaccharides were affected by their molecular weight and fucose branches. Oligosaccharides with different sulfation patterns of the fucose branching had a similar ability to inhibit the FXa by the intrinsic factor Xase (factor IXa-VIIIa complex). Oligosaccharides with 2,4- O -sulfo fucose branches from fCS- Ib showed higher activities than ones with 3,4- O -disulfo branches obtained from fCS- Pg . Furthermore, a heptasaccharide is the minimum size oligosaccharide required for anticoagulation and FXII activation. This activity was absent for fCS oligosaccharides smaller than nonasaccharides . Molecular size and fucose branch sulfation are important for anticoagulant activity and reduction of size can reverse the activation of FXII caused by native fCSs.
研究领域:
生物化学
·
药理学
✓ 已验证
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2020
·
IF 4.335
Ling Tang,Qin Yang,Jianfang Zhang,Guisheng Deng
A regioselective reverse strategy for the construction of eight-membered sulfur-containing heterocycle-fused γ-pyrones and 2-(1,4-dithianyl)-4-pyrones starting from 2-diazo-γ-pyrones and dithioacetals was achieved for the first time. The process combines C–S bond formation via sulfur ylides and C–C bond formation via electron transfer to afford the target molecules in a facile manner with 100% regioselectivity and in excellent isolated yields (up to 90%).
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2019
·Vol. 52
·期 29
·295502
·
IF 2.829
Binbin Qian,Chaodeng Liu,Junmin Xu,Qingqing Sun,Huige Yang,Wentao Liu,Li Zhang,Takeo Minari,Xuying Liu,Jinzhou Chen
Three-dimensional (3D) nitrogen-doped graphene frameworks contributing to high-efficiency and high-stability Li-S batteries have received wide interest in energy storage fields. Herein, a 3D nitrogen-doped graphene composite framework was prepared with spatial dendritic triamines as crosslinking interconnectors, and subsequently employed for Li-S batteries with high efficiency and stability. The nanoscale spatial network of triamine-bonded graphene as molecular spacers can enlarge the interlayer spacing and change surface topography, which allows the nanocomposites to inhibit phase separation and thus capture and homogeneously store well-dispersed sulfur nanocrystals at a high capacity exceeding 70%, even by a solution process. In our work, the composite of S@GO-TAPA as the cathode material delivers the highest initial discharge capacity of 965 mAh g−1. Besides that, an average coulombic efficiency of 91% is achieved after more than 100 cycles and 66.5% of the capacity remains, even after 100 cycles at 0.2 °C. The results suggest that the shuttle effect is remarkably suppressed. Therefore, the design strategy for cathode media is promising for fully solution-processing energy storage devices with printing, coating and spraying techniques.
研究领域:
能源存储
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Shunli Wang,Ying Liang,Tingting Dai,Yalin Liu,Zhuyin Sui,Xinlong Tian,Qi Chen
Covalent organic frameworks (COFs) with pre-designed structure and customized properties have been employed as sulfur storage materials for lithium-sulfur (Li-S) batteries. In this work, a cationic mesoporous COF ( COF-NI ) was synthesized by grafting a quaternary ammonium salt group onto the pore channel of COFs via a one-pot three components tandem reaction strategy. The post-functionalized COFs were utilized as the matrix framework to successfully construct the Li-S battery with high-speed capacity and long-term stability. The experimental results showed that, after loading active material sulfur, cationic COF-NI effectively suppressed the shuttle effect of the intermediate lithium polysulfide species in Li-S batteries, and exhibited better cycle stability than the as-obtained neutral COF ( COF-Bu ). For example, compared with COF-Bu based sulfur cathode (521 mA h g −1 ), the cationic COF-NI based sulfur cathode maintained a discharge capacity of 758 mA h g −1 after 100 cycles. These results clearly showed that appropriate pore environment of COFs can be prepared by rational design, which can reduce the shuttle effect of lithium polysulfide species and improve the performance of Li-S battery.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 22
·225402
·
IF 3.953
Zongjie Hu,Gaojie Yan,Jinchen Zhao,Xiaojie Zhang,Yi Feng,Xiongwei Qu,Haijie Ben,Jingjing Shi
The practical application of lithium–sulfur 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.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）