ACS Applied Energy Materials
·
2023
·
IF 6.4
Yongbing Li,Runhe He,Hao Liu,Yun Zhang,Haihui Liu,Na Han,Xingxiang Zhang
Sulfurized polyacrylonitrile (SPAN) is an attractive cathode material for lithium–sulfur batteries because of its high theoretical energy density, good cyclic stability, and low self-discharging rate. However, the slow reaction kinetics enormously limits the actual capacity and rate performance of SPAN cathodes. In the present work, SPAN nanofibers containing a certain amount of CoS2 were used to prepare high-performance cathode materials for lithium–sulfur batteries, and the redox kinetics of sulfur conversion was promoted by imparting catalytic activities to SPAN. Specifically, Co was uniformly distributed in CoS2-SPAN nanofibers in the form of CoS2, which reduced the charge transfer impedance in the electrode, accelerated the conversion of short-chain polysulfide to Li2S/Li2S2, increased the migration rate of lithium ions, and improved the kinetics of the redox reaction. Hence, after the sulfurization of polyacrylonitrile nanofibers containing 4 wt % of CoCO3, CoS2-SFPAN manifested a high reversible capacity of 762 mAh g–1composite at 0.2 C, an excellent multiplicative performance of 592 mAh g–1composite at 4.0 C, and an extremely stable cycle life of more than 500 cycles at 1.0 C. When the cathode was tested under a high areal loading (S) of 5.5 mg cm–2 and a lean electrolyte (E) condition of E/S = 10 μL mg–1, it maintained high reversible capacities of 710 mAh g–1composite at 0.1 C and 652 mAh g–1composite at 0.2 C.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 12
·9946-9959
·
IF 2.22
Liu Jian,Xu Ying-Ge,Kong Ling-Bin
The CoS 2 /NiS 2 -RGO composite with excellent electrochemical performance is first used as an anode material for sodium-ion capacitors (SICs) and sodium-ion batteries (SIBs). CoS 2 /NiS 2 -RGO is prepared by one-step hydrothermal process. In half-cell tests, CoS 2 /NiS 2 -RGO exhibits a remarkably high reversible capacity of 473.7 mA h g −1 after 50 cycles at the specific current of 100 mA g −1 . SICs show an impressive energy density of 139.1 W h kg −1 at the power density of 14,000 W kg −1 , which has great advantages compare to the commercial lithium ion batteries. SIBs also show a good capacity of 50 mA h g −1 at a rate of 5 °C. The excellent electrochemical performance of CoS 2 /NiS 2 -RGO is mainly attributed to the heterostructure formed by CoS 2 and NiS 2 , which effectively improves the electrical conductivity. On the other hand, there is a good synergistic effect between RGO and CoS 2 /NiS 2 . The large specific surface area of RGO makes CoS 2 /NiS 2 disperse uniformly on the surface of RGO, preventing agglomeration and reducing particle size of CoS 2 /NiS 2 . In turn, CoS 2 /NiS 2 acting on the surface layer of RGO hinders the secondary overlap and increases the electrical conductivity of RGO. The mixed bimetallic sulfide/RGO system is expected to promote the rapid development of sodium storage devices.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 4
·2100885
·
IF 4.149
Jing Hu,Xin-Liang Wang,Hao Guo,Ming Yang,Jin-Xiu Yuan,Ying Chu,Li-Li Zhao
Transition metal sulfide is the most widely used cathode material for thermal batteries. The development of modern weapons requires higher quality and output of transition metal sulfide cathode materials. However, the current synthesis processes have some limitations for large-scale industrial production due to the long production cycle and low production efficiency. Herein, by controlling the synthesis temperature and adopting a high-temperature solid-state method, sulfide FeS 2 , CoS 2 , and NiS 2 with single-phase and good crystalline structure are synthesized. This method with a simple production process, short production cycle, and high single output is suitable for engineering production. Hence, guidance for large-scale industrial synthesis of pure phase FeS 2 , NiS 2 , and CoS 2 is provided, embodying important scientific significance and application value.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Materials Express
·
2020
·Vol. 10
·期 10
·1725-1731
·
IF 1.65
Duan Xiaobo,Ding Yanhong,Yu Meng
Multilayer graphene was prepared in this study by microwave burst method. Cu9S5/CoS/graphene and CuS/CoS2/graphene composites were obtained by hydrothermal method to regulate the molecular structure and combination of Cu and Co metal sulfides on graphene
substrate. Graphite oxide was doped by hydrothermal method, and then Cu9S5/CoS/graphene composite was prepared by microwave explosion method. Raman, SEM and TEM were used to characterize the self-made graphene. Results showed that the multilayer graphene had a bag-like
structure which was beneficial to anchor sulfide. Three graphene-based composites were characterized by scanning electron microscopy, X-ray diffraction, energy spectrum analysis and electrochemical properties. Moreover, results showed that CuS/CoS2/graphene had the best electrochemical
performance, and its specific capacity reached 324 F/g when the current density was 1 A · g–1, which was much higher than that of the other two samples. Capacity retention rate, interfacial charge transfer resistance and electrolyte diffusion resistance also have advantages.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Guoxuan Tang,Yu Chen,Jiaojiao Chen,Lin Liu,Haocun Wen,Wenda Liu,Jingyun Liu,Zeyi Xiao,Senqing Fan
Several CoS 2 /Ni flow-through porous electrodes are fabricated to promote gas bubble release for enhanced oxygen evolution reaction. Structural characterization shows that CoS 2 catalyst is immobilized on the porous Ni substrate. The bubble average diameter can be decreased from 29.21 ± 17.9 μm to 13.38 ± 5.05 μm, and the desorption time is decreased from 1.615 s to 0.067 s, with the electrolyte velocity increasing from 0 cm/s to 2.89 cm/s at the current density of 100 mA/cm 2 . A mathematical model is proposed to describe gas bubble growth, which is found that higher current density is not bring much bigger gas bubble. The overpotential of the CoS 2 /Ni electrode for OER is 498 mV at 100 mA/cm 2 . The overpotential of CoS 2 /Ni electrode can be decreased from 754 mV to 661 mV with the electrolyte velocity increase from 0 cm/s to 9.42 cm/s at 200 mA/cm 2 with the energy required for hydrogen production reduced by 5.01 kWh/kmol.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Shuo Meng,Shanshan Yang,Ting He,Jian Guo,Mingze Xu,Lu Chen,Kexuan Liao,Lianhai Zu,Chen Zhou,Chi Zhang,Jinhu Yang
Benzoquinone (BQ) is considered a promising cathode material for aqueous zinc-ion batteries due to its simplest molecular structure and highest theoretical specific capacity among quinones. However, intrinsic problems derived from BQ including severe dissolution, narrow crystal interplanar d-spacings accessible by desolved Zn2+ only, and poor conductivity cause inferior battery performance. Herein, a strategy based on a “nanopore-confined dual-site synergy mechanism” is proposed to stabilize the BQ cathode and boost Zn2+ desolvation/coordination reactions for stable and fast Zn storage, which is realized by the construction of CoS2 nanodot-embedded MOF-derived porous carbon (MPC) as an efficient host for BQ molecules. The MPC provides enough pore space to accommodate a substantial amount of BQ molecules with good electric conductivity, whereas CoS2 in pores offering abundant Co and S sites exerts strong chemical binding over BQ species and facilitates Zn2+ desolvation/coordination, respectively, synergistically suppressing the dissolution of cathodes and imparting the rapid reaction kinetics of batteries. Consequently, the developed BQ@CoS2-MPC cathode delivers a high reversible capacity of 458 mA h g–1 at 0.5 C, excellent rate capability, and pronounced cycling stability with a low decay of 0.003% per cycle for over 10,000 cycles at 20 C. The work proposes an effective strategy toward high-performance organic electrode materials.
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
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yafei Xue,Dan Luo,Na Yang,Ge Ma,Zhen Zhang,Junfeng Hou,Jiantao Wang,Chuyin Ma,Xin Wang,Mingliang Jin,Zhongwei Chen,Lingling Shui
Lithium-sulfur (Li-S) batteries are showing a huge potentiality in the energy storage market owing to its high theoretical energy density and cost-effectiveness. However, there are still some thorny issues needed to be tackled before realizing their practical applications, including underperformed rate capability and unsatisfactory cycling stability. Herein, we have constructed the checkerboard-like heterostructured CoS 2 /Co nanoparticle inside porous carbon by the electrochemically-sulfonated reaction of lithium polysulfides (LiPS) and used them as sulfur electrocatalyst. Benefiting from this structure advantage, the catalyst can not only promote the chemical adsorption of LiPS, but also acts as promoter to provide coupled electrons to accelerate its redox reaction. Through synergistic enhancement, the checkerboard-like CoS 2 /Co heterostructure provides a boosted chemical adsorption and accelerated catalytic conversion of LiPS, rendering suppressed shuttle effect and enhanced Li-S kinetics. In addition, the porous carbon carriers offer abundant nanoscale pores to effectively immobilize sulfur and accommodate its volume expansion. Therefore, the CoS 2 /Co sulfur composites exhibit decent rate capability up to 5C and long-term cycling performance over 500 cycles at 1C with a capacity fading rate below 0.059% per cycle. Moreover, an admirable cyclic stability can also be achieved under raised sulfur loading of 7.13 mg∙cm −2 and low E/S ratio of 4.5 mL∙g −1 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2026
·Vol. 31
·期 7
·1131
·
IF 5.1
Shuai Shao,Xiaocan Liu,Ping Liang,Weiye Yang,Lijian Meng,Hongyan Peng,Shihua Zhao
Cobalt disulfide (CoS2) features highly active catalytic sites and is regarded as a promising candidate for electrocatalytic hydrogen evolution. In this study, molybdenum-doped cobalt disulfide (CoS2:Mo) was synthesized via a facile hydrothermal approach. XRD analysis confirms that the obtained samples crystallize in a cubic pyrite structure, with diffraction peaks consistently shifting towards lower angles. SEM characterization reveals that the samples exhibit microrod-like morphologies with an average size of approximately 1 μm. Integrated analyses from XRD, XPS, and EDS mapping demonstrate that Mo is uniformly distributed across the surface and successfully doped into the CoS2lattice. Electrochemical measurements indicate that the CoS2:Mo sample delivers a low overpotential of 122 mV and a Tafel slope of 128 mV dec−1at a current density of 10 mA cm−2in alkaline media, significantly surpassing the performance of pure CoS2and MoS2. Moreover, the CoS2:Mo exhibits an enhanced double-layer capacitance, with a Cdlvalue of 2.72 mF cm−2, superior to that of pure CoS2(1.63 mF cm−2) and MoS2(0.31 mF cm−2). Mo doping enhances conductivity and active sites, thereby boosting electrocatalysis. This work presents an effective strategy for the development of cost-efficient and high-performance non-precious metal electrocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 8.3
Kejie Zhang,Hongyu Yuan,Yunhao Wang,Chen Mao,Zhen Mou,Peng Chen,Wei Meng,Zhiping Zhou
In this paper, CdS nanopaticles were first prepared by a simple hydrothermal method, and then CoS 2 nanosheet was grown in situ on CdS, thereby successfully constructing CdS/CoS 2 binary heterojunction photocatalyst. The prepared CdS/CoS 2 -15 % nano-heterojunction exhibited the highest hydrogen yield in photocatalytic water decomposition (45.89 mmol h −1 g −1 ), which was 112 times higher than that of single CdS. The high photocatalytic activity and relatively high stability of the CdS/CoS 2 -15 % nano heterojunction could be mainly attributed to the loading of the co-catalyst CoS 2 . Density functional theory (DFT) calculations show that CoS 2 has properties similar to metals, and the Fermi level of CoS 2 are lower than that of CdS. The sheet-like CoS 2 and its higher binding energy provide favorable conditions for the adsorption of hydrogen ions, and its metallic like properties and lower Fermi level help CoS 2 effectively obtain photo generated electrons from CdS, which effectively promotes the production of hydrogen gas. This study provides a useful idea for the development of cost-effective co-catalysts to assist other semiconductor materials in improving the hydrogen production efficiency of visible-light-driven photolysis of water.
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Yanhui Liang,Qian Liu,Yonglan Luo,Xuping Sun,Yuquan He,Abdullah M. Asiri
In this paper, we report the use of Zn 0.76 Co 0.24 S/CoS 2 nanowires array on Ti mesh (Zn-Co-S/TM) topotactically derived from ZnCo 2 O 4 nanowires array precursor as a durable and efficient bifunctional hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalyst in strongly alkaline media. This Zn-Co-S/TM electrode drives 20 mA cm −2 at 238 mV HER overpotential and 20 mA cm −2 at 330 mV OER overpotential. The corresponding two-electrode alkaline water-splitting system achieves 10 mA cm −2 at a cell voltage of 1.66 V.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 11
·期 1
·98-106
·
IF 7
Xiaoqu Wang,Limin Wang,Karuppasamy Kohila Rani,Xinglan Peng,Yu Ning,Xiaotian Liu,Youjun Fan,Du-Hong Chen,Wei Chen
Delicately fabricating efficient electro-catalysts to boost the catalytic kinetics of the oxygen evolution reaction (OER) is essential for realizing the efficient performance of water splitting into hydrogen to alleviate environmental issues and the energy crisis. Here, heterogeneous and hollow microspheres (denoted as CoS2/MS2-HPMS, M = Fe, FeCo) were obtained by the sulfurization of Fe3+-decorated ZIF-67 hollow microspheres (ZIF-67-HMS). At a current density of 10 mA cm−2, the prepared CoS2/MS2-HPMS showed an overpotential of 217 mV for the OER, which is lower than that of commercial RuO2 (336 mV). Density functional theory calculations demonstrated low reaction free energies of the intermediates of the OER and significant charge accumulation at the heterojunction interface between CoS2 and FeCoS2. This work establishes a method for the assembly of nanoparticles and the construction of heterojunctions.
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产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2026
·
IF 2.7
Zhou HuiPing,Zhu Wei,Gao YingChun,Zhang YuanGuang
Dopamine (DA) as an important catecholamine neurotransmitter in the human body, plays a crucial role in regulating cognition, emotions, and physical movement. Therefore, quantitative detection of DA is of great significance. Recently, transition metal sulfides such as cobalt sulfide (CoS 2 ) receive widespread attention in the field of DA detection due to their low cost, excellent catalytic performance and structural stability. To achieve the optimal electrochemical response of CoS 2 /Nafion/GCE to DA, we systematically investigate the effects of electrode coating volume, electrolyte solution pH value, and scanning speed on DA detection performance. After optimizing the above parameters, the CoS 2 /Nafion/GCE sensor exhibited excellent peak current responses for the electrochemical detection of DA. It exhibits a linear response range spanning 1.0-300.7 µM, which can be divided into two distinct segments: 1.0-108.8 µM (LOD = 0.13 µM, S/ N = 3) and 108.8-300.7 µM (LOD = 1.3 µM, S/ N = 3). Furthermore, the sensor demonstrates specific electrocatalytic activity toward DA, endowing it with excellent detection selectivity even in the presence of high concentrations of interfering species such as ascorbic acid, uric acid, and glucose. In the detection of real samples of human urine, the recovery rate of DA is 95.47% to 101.78%. This result provides an ideal material platform for developing highly selective and low-cost DA detection sensors.
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DOI
高影响因子
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