Joule
·
2023
·
IF 39.8
Zhendong Li,Ge Zhou,Shuai Li,Hongyu Liu,Liping Wang,Hong Li
Conversion-type cathodes for lithium metal batteries are considered long-term targets due to their low cost and high energy density. However, they suffer from poor cycling life. In this study, we present an interface engineering strategy that involves constructing a three-dimensional (3D) ionic-electronic network to overcome this challenge. In detail, we fabricate a cathode-electrolyte interphase (CEI) as an ionic conductor using a specially designed localized high-concentration electrolyte (LHCE). Additionally, we construct a durable electronic network by applying a functional binder and carbon nanotubes (CNTs) onto the surface of the active material. We demonstrate that micro-sized FeS 2 cathode achieves a capacity retention of 72.6% after 700 cycles at a current rate of 0.5 C and 4 mAh/cm 2 . This work addresses the construction of a stable ionic-electronic network that is key to achieving stable performance. Moreover, it reveals the potential of conversion cathodes, even in micro-size, for practical applications.
研究领域:
材料科学
·
电化学
·
能源存储
·
锂金属电池
·
纳米材料
·
界面化学
·
固态离子学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Chuntao Ma,Yuhao Ma,Shuai Li,Hongyu Liu,Hao Wang,Dong Yan,Xiaobin Niu,Hong Li,Liping Wang
Conversion-type transition metal-based materials (MZx) are considered promising cathodes for lithium metal batteries due to their low cost, abundant availability, and high theoretical energy density. However, they suffer from rapid capacity decay caused by the transformation into two inhomogeneous phases during discharge. Herein, we use a pulse current discharge activation method (under 3C) to induce homogeneous phase nucleations. As a result, the microsized FeS2 cathode transforms into a homogeneous mixture of nanosized Fe and Li2S, effectively mitigating volume expansion. It exhibits exceptional cycling performance, delivering a specific capacity of 572.8 mAh g–1 after 800 cycles at 0.33C. Even at a high areal capacity of 5.4 mAh cm–2, it undergoes 180 cycles with a capacity retention of 89.3% at 0.33C. This work highlights the crucial role of homogeneous nucleation in achieving long cycling life for conversion-type cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2013
·Vol. 3
·期 17
·6132-6140
·
IF 2.562
Jian Xia,Jiqing Jiao,Bilong Dai,Wenda Qiu,Shenxian He,Weitao Qiu,Peikang Shen,Liuping Chen
Metal sulfides have received growing attention as electrode materials for lithium ion batteries. However, large volume changes often cause a sharp decrease in capacity and thus leads to poor cycling performance. Here, we developed a facile hydrothermal process for preparation of FeS2 nanocrystals (NCs) with diameter ranging from 10 to 35 nm and tested them as anode materials for lithium-ion batteries. In comparison with FeS2 micro-particles, these FeS2 NCs show higher capacity, a more stable discharge plateau and better cycling performance. Moreover, we studied the magnetic properties of these FeS2 NCs in detail for the first time. The two as-prepared FeS2 NCs have completely different magnetic properties. FeS2 NCs prepared from Fe(acac)3 show antiferromagnetism at room temperature and exhibit weak paramagnetism at low temperature. However, when nano-Fe3O4 was used as the iron source, the synthesized products show ferromagnetic and paramagnetic behaviors which is due to the formation of a trace amount of pyrrhotite in the main phase. Our results indicate that detection of the trace amount of impurity in the main FeS2 phase by traditional methods such as XRD, EDS, XPS and even room-temperature Mössbauer spectroscopy is ineffective, and that magnetic measurements alone are reliable.
研究领域:
材料科学
·
纳米科技
·
电化学
·
能源存储
·
磁学
✓ 已验证
DOI
高影响因子
Small
·
2018
·Vol. 14
·期 26
·1801070
·
IF 9.598
Yuxuan Li,Jie Yin,Li An,Min Lu,Ke Sun,Yong-Qin Zhao,Daqiang Gao,Fangyi Cheng,Pinxian Xi
Electrochemical water splitting to produce hydrogen and oxygen, as an important reaction for renewable energy storage, needs highly efficient and stable catalysts. Herein, FeS 2 /CoS 2 interface nanosheets (NSs) as efficient bifunctional electrocatalysts for overall water splitting are reported. The thickness and interface disordered structure with rich defects of FeS 2 /CoS 2 NSs are confirmed by atomic force microscopy and high-resolution transmission electron microscopy. Furthermore, extended X-ray absorption fine structure spectroscopy clarifies that FeS 2 /CoS 2 NSs with sulfur vacancies, which can further increase electrocatalytic performance. Benefiting from the interface nanosheets' structure with abundant defects, the FeS 2 /CoS 2 NSs show remarkable hydrogen evolution reaction (HER) performance with a low overpotential of 78.2 mV at 10 mA cm −2 and a superior stability for 80 h in 1.0 m KOH, and an overpotential of 302 mV at 100 mA cm −2 for the oxygen evolution reaction (OER). More importantly, the FeS 2 /CoS 2 NSs display excellent performance for overall water splitting with a voltage of 1.47 V to achieve current density of 10 mA cm −2 and maintain the activity for at least 21 h. The present work highlights the importance of engineering interface nanosheets with rich defects based on transition metal dichalcogenides for boosting the HER and OER performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yan Wang,Ming Liu,Haibing Liu,Junhang Ding,Tian Wang,Jinfeng Dong,Bingbing Wang,Xing Tian,Yanzhi Xia
Search for anode materials for sodium ions batteries (SIBs) attracts researchers around the world because of their high-rate capability and excellent capacity. However, their stability needs to be improved. Thus, this work demonstrates a controllable method for the synthesis of one-dimensional (1D) hollow microfibers using “egg-box-structured” Fe-alginate fibers. The goal was to obtain an SIBs anode material with the optimal number of voids for efficient Na + storage. An optimized micro and pore structures were designed to obtain the shortest Na + -diffusion distance. The novel FeS 2 /Fe 2 O 3 -HF composite was able to withstand volume expansion during charge/discharge processes and showed high specificity and rate capacity (483 mAh/g at 100 mA/g, 241 mAh/g at 2000 mA/g). The capacity retention of this cell was excellent: it maintained 245 mAh/g over four hundred 1000 mA/g cycles. Thus, FeS 2 /Fe 2 O 3 -HF composite is a very promising active anode material for SIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Mingyi Lu,Kang Qin,Fengyuan Zhang,Fan Qin,Quan Feng,Rongbo Guo
Improving the composting efficiency of lignocellulose wastes has been the focus in the field of aerobic fermentation. In this study, FeS 2 was modified on the surface of palygorskite to regulate the straw composting. Material characterizations showed that FeS 2 /Pal composite exhibited glutathione oxidase and catalase activities, attributing to the fact that nano FeS 2 filled the aggregation space of the original palygorskite, exposing more active sulfur vacancy defects. During the composting process, the addition of FeS 2 /Pal could adjust pH value and increase electrical conductivity, which was conducive to improving the efficiency of biological redox process. The total degradation ratio of cellulose was 52.54% with FeS 2 /Pal added. The repolymerization of small molecule intermediates was strengthened, and the final polymerization degree and maturity of composting products was improved. Since the sequence abundance of aromatic amino acids biosynthesis and carbon fixation pathways was higher revealed by PICRUSt . High-throughput sequencing results showed that bacterial community was more dominant than fungi, with community richness index increased by 2.3–3.7 times. The pathogenic bacteria such as Atopostipes and Corynebacterium were disappeared, and heat-resistant bacteria were dominant. The key bacteria and fungi in the group added with FeS 2 /Pal were Limnochordaceae and Melanocarpus genus, which were related to the cellulose enzymatic hydrolysis and humification degree.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 7
·921
·
IF 4.7
Sheng Wu,Qian Liu,Wei Zhang,Ruizhe Wu,Hongping Tang,Yulin Ma,Wenqiang Xu,Shufang Jiang
As a promising candidate for high-energy-density rechargeable lithium metal batteries, Li/FeS2batteries still suffer from the large volume change and severe shuttle effect of lithium polysulfides during cycling. To improve the electrochemical performance, great efforts have been made to modify FeS2cathodes by constructing various nanocomposites. However, energy density is sacrificed, and these materials are not applicable at a large scale. Herein, we report that the electrochemical performance of commercial FeS2can be greatly enhanced with the application of a double-layer MoS2-CNTs-PVA (MCP)/PVA separator fabricated by electrospinning. The assembled Li/FeS2batteries can still deliver a high discharge capacity of 400 mAh/g after 200 cycles at a current density of 0.5 C. The improved cycling stability can be attributed to the strong affinity towards lithium polysulfides (LiPSs) of the hydroxyl-rich PVA matrix and the unique double-layer structure, in which the bottom layer acts as an electrical insulation layer and the top layer coupled with MoS2/CNTs provides catalytic sites for LiPS conversion.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Di Shang,Xinru Wang,Haiyu Lei,Jiamin Wei,Hualin Lin,Sheng Han
Generalizable anode via interfacial kinetics: MXene scaffold + conversion chalcogenide + surfactant-guided control. • Nb 2 C: 2D percolation network and stress buffer; FeS 2 : high capacity; CTAB: nanospheronization, uniform anchoring, C–S–C linkages. • In situ hydrothermal + electrostatic guidance: Nb 2 C@FeS 2 @CTAB heterostructure with expanded interlayers and uniform current. Nb 2 C@FeS 2 @CTAB heterostructured composite anode was fabricated via a dual-phase modification strategy to enhance the electrochemical performance of lithium-ion batteries. The constructed heterointerface markedly shortens Li + migration pathways within the active phase and reduces the energetic barriers (0.36 eV) for ion migration and diffusion, thereby improving high-rate capability and energy storage performance. Experiments demonstrate that the Nb 2 C@FeS 2 @CTAB composite delivers excellent rate characteristics and high capacity, achieving a discharge specific capacity of 1296 mAh g −1 and stable operation for 100 cycles. Moreover, at a high current density of 5 A g −1 , it maintains a discharge specific capacity of 219 mAh g −1 with robust cycling stability over 2000 cycles. These findings offer a new design paradigm for FeS 2 -based anodes and underscore the potential of Nb 2 C@FeS 2 @CTAB heterostructures for high-performance battery applications.
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2016
·
IF 0
Yu Xuan Liang,Peng Peng Bai,Shu Qi Zheng
Pyrite (FeS2) is an important semiconductor material which shows various excellent optical and electrical properties and extensive applied prospect as a new-type, photoelectrical functional materials. In this study, a low cost and efficient simple hydrothermal two-step synthetic method was given to obtain FeS2 microspheres with 2-3 μm in diameter. The obtained products were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and ultraviolet and visible spectrophotometer (UV-Vis). XRD showed that the synthetic sample consisted of two crystal structures of FeS2, pyrite and marcasite. SEM observation indicated that FeS2 microspheres were well crystallized and had good uniformity. UV-Vis spectrum had a strong optical absorption in the region of 200-400 nm wave length. The reaction temperature had an impact on the size of FeS2 microspheres. A possible mechanism for the size of the FeS2 microspheres generated at high temperature is smaller than that at low temperature is discussed.
研究领域:
材料科学
·
纳米技术
·
半导体材料
·
光电子学
✓ 已验证
DOI
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Hao Du,Changzhu Yang,Wenhong Pu,Lingyu Zeng,Jianyu Gong
Electrochemical reduction of N2 reaction (NRR) into NH3 promises a sustainable and environmentally friendly technology at ambient temperature. However, high energy barrier and the competition with the hydrogen evolution reaction result in poor NH3 yield and low faradaic efficiency (FE) of NRR. Herein, the FeS2 catalyst was synthesized via a one-step hydrothermal method for NRR. In the N2-saturated Na2SO4 electrolyte, this catalyst exhibited superior catalytic performance to achieve a high NH3 yield (37.2 μg h–1 mgcat.–1) and FE (11.2%) with high stability and selectivity at −0.5 V versus the reversible hydrogen electrode, outperforming other NRR catalysts. According to experimental results, a preferable associative distal pathway was proposed. Density functional theory calculations revealed that the NRR process can proceed preferably on Fe atoms instead of S atoms, and the conversion of *NH2 to *NH3 was the potential-determining step with an energy barrier of 0.45 eV. Therefore, this work offers a new avenue to prepare high-efficiency and highly selective transition-metal-based catalysts for NRR under ambient conditions.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 2
·1422-1433
·
IF 2.993
Jiang Jibo,Zhu Liying,Chen Haotian,Sun Yaoxin,Qian Wei,Lin Hualin,Han Sheng
Electrocatalytic hydrogen evolution is the most cost-effective method for producing hydrogen as a large-scale clean energy source. Thus, catalysts of low-cost hydrogen evolution are developing at great speed. FeS 2 –reduced graphene oxide (RGO) hybrid catalysts are synthesized with the use of abundant and inexpensive component worldwide. The catalyst has satisfactory electrocatalytic performance and excellent stability in 0.5 M H 2 SO 4 solution. The catalyst supported by RGO is the ideal electrocatalyst with satisfactory electrical conductivity with 61 mV dec −1 of the Tafel slope. What is more, the current density changes slightly in 36 h and the catalytic performance is relatively stable at 200 mV overpotential. Therefore, the catalyst supported by RGO has high potential for industrial production due to its simple composition and satisfactory electrocatalytic effect.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Mudassir Habib,Meesam Ali,Tehreem Ayaz,Ali Shan,Guilu Zeng,Zhengyuan Zhou,Shuguang Lyu
Rapid growth and industrialization have become a major threat to water contamination with carcinogenic chlorinated hydrocarbons such as trichloroethylene (TCE). Therefore, this study aims to assess the TCE degradation performance through advanced oxidation process (AOP) using catalyst FeS 2 in combination with oxidants persulfate (PS), peroxymonosulfate (PMS), and hydrogen peroxide (H 2 O 2 ) in PS/FeS 2 , PMS/FeS 2 , and H 2 O 2 /FeS 2 systems, respectively. TCE concentration was analyzed using gas chromatography (GC). The results found the trend for TCE degradation by the systems was PMS/FeS 2 >PS/FeS 2 >H 2 O 2 /FeS 2 (99.84, 99.63, and 98.47%, respectively). Degradation of TCE was analyzed at different pH ranges (3–11) and maximum degradation at a wide pH range was observed for PMS/FeS 2 . The analysis using electron paramagnetic resonance (EPR) and scavenging tests explored responsible reactive oxygen species (ROS) for TCE degradation and found that HO• and SO 4 − • played the most effective role. The results of catalyst stability showed PMS/FeS 2 system the most promising with the stability of 99, 96 and 50% for the first, second and third runs, respectively. The system was also found efficient in the presence of surfactants (TW-80, TX-100, and Brij-35) in ultra-pure water (89.41, 34.11, 96.61%, respectively), and actual groundwater (94.37, 33.72, and 73.48%, respectively), but at higher reagents dosages (5X for ultra-pure water and 10X actual ground water). Furthermore, it is demonstrated that the oxic systems have degradation capability for other TCE-like pollutants. In conclusion, due to its high stability, reactivity, and cost-effectiveness, PMS/FeS 2 system could be a better choice for the treatment of TCE contaminated water and can be beneficial for field application.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）