JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Henan Jia,Pei Su,Jiahang Fan,Taotao Guo,Yiming Zhang,Lingfen Miao,Lei Wan,Penghui Yang,Mao-Cheng Liu
Yolk-shell-structured transition metal sulfides (TMSs)/carbon nanocomposites are highly desirable in advanced energy storage system, such as sodium-ion batteries (SIBs) and supercapacitors (SCs). Nevertheless, practical applications are still prevented by the loose attachment of TMSs with carbon caused by conversion stress, the aggregation of TMSs nanoparticles and the sluggish ion transport caused by high crystallinity of carbon. Here, the disperse hollow Co 9 S 8 nanoparticles encapsulated into N,S-codoped carbon nanotubes (CNTs) with poor crystallinity through Co N C bond was synthesized (CS-NSCNT) to overcome the above obstacles. The designed CS-NSCNT can provide the short diffusion path and prevent the huge volume expansion of conversion reaction. Moreover, the established Co N C bond endows the strong interaction and regulates the electronic structure thus promote the stability and rate performance effectively. The CS-NSCNT SCs’s electrode delivers a high specific capacitance of 1150 F g −1 at 1 A g −1 , with a high cycling life stability and rate performance. For SIBs, the CS-NSCNT cathode demonstrates an initial reversible capacity of 475 mAh g −1 at 0.1 A g −1 and an excellent rate performance with a capacity retention of 53 % at 10 A g −1 . This work may satisfy the long-stability, high-capacitance/capacity, high-power/energy density application requirements of future applications.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Boxin Fan,Anmin Lei,Yueping Zou,Miaomiao Liu,Lianhua Zhao,Biyao Jin
The charging and discharging processes of rechargeable Zn-air batteries (ZABs) require the use of precious metal catalysts (Pt and RuO 2 ) that are expensive. Therefore, preparing efficient, stable, and affordable metal bifunctional oxygen electrocatalysts compatible with both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial. Herein, a nanoflower-like Co 9 S 8 /Co 1-x S/WS 2 bifunctional oxygen electrocatalyst with a layered structure has been prepared. The cobalt sulfide serves as the main active site and the synergistic interaction between the multi-components modulates the electronic structure of the active site and generates abundant S vacancies, thereby effectively improving the bifunctional oxygen electrocatalytic performance. The electrocatalytic activity of the prepared catalyst for ORR/OER is close to that of commercial noble metal catalysts. When Co 9 S 8 /Co 1-x S/WS 2 is used as the cathode material in Zn-air batteries, the batteries exhibit high specific capacity (822.6 mAh g Zn −1 ), excellent energy density (958.9 Wh kg Zn −1 ), as well as a battery charge/discharge cycling time that was twice that of the commercial catalyst PtC+RuO 2 .
研究领域:
材料科学
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电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2018
·
IF 2.179
Yun Zhou,Shengqi Xi,Xigang Yang,Hongjing Wu
Conductivity and morphology are the two important factors affecting the performance of electrocatalysts . In this article, a facile two-step hydrothermal process was developed to grow Co 9 S 8 -Ni 3 S 2 nanoarrays on nickel foam (Co 9 S 8 -Ni 3 S 2 NAs/NF). The as-obtained catalyst possessed a novel morphology, in which the Co 9 S 8 nanoneedles were surrounded by Ni 3 S 2 ultrathin nanosheets . The resultant Co 9 S 8 -Ni 3 S 2 nanoarrays not only permitted more exposures of active sites but also facilitated the charges and ions transport along the nanoarrays. Moreover, both Co 9 S 8 and Ni 3 S 2 exhibited metallic properties allowed the catalysts with conductivity (metallic conductor vs. semiconductor). Co 9 S 8 -Ni 3 S 2 NAs/NF exhibited excellent electrocatalytic activities for both HER and OER in 1.0 M KOH solution. To reach a large current density of 100 mA cm −2 , it only required overpotentials of 204 mV and 346 mV for HER and OER, respectively. After long-term electrolysis, the high activities were still preserved. This work indicates efficient electrocatalysts can be obtained by the rational design of the heterostructure , which sheds some light on the development of noble metal-free electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 29
·17345-17356
·
IF 10.733
Shifu Wang,Zuoyi Xiao,Shangru Zhai,Haisong Wang,Weijie Cai,Longfei Qin,Jianying Huang,Di Zhao,Zhongcheng Li,Qingda An
The design of advanced supercapacitors requires electrode materials that combine high surface area with a developed hierarchical porous structure to facilitate ion transport and electrolyte permeability. Herein, we report a cross-linking and in situ sulfuration strategy for synthesizing nickel sulfide (Ni3S2) nanocrystal-attached cobalt sulfide (Co9S8) encapsulated on three-dimensional (3D) N-doped hierarchical porous carbon (Ni3S2@Co9S8/N-HPC). The Ni3S2@Co9S8/N-HPC composite was extensively studied using different characterization technologies. The results revealed that the obtained material integrated the advantages of a developed N-doped carbon framework (fast ion transport and excellent electrical conductivity) and transition metal sulfide species (high theoretical specific capacitance). Benefiting from the synergistic effect of a strawberry-like Ni3S2@Co9S8 structure and 3D interconnected hierarchical porous carbon, the resulting Ni3S2@Co9S8/N-HPC composite exhibited an ultrahigh attractive specific capacitance of 1970.5 F g−1 at a current density of 0.5 A g−1 and excellent cycling stability with a capacitance retention of 89.5% after 5000 cycles at 10 A g−1. In addition, an asymmetric supercapacitor (ASC) of Ni3S2@Co9S8/N-HPC//HPC was assembled in a 6 M KOH electrolyte. It delivered an energy density of 77.1 W h kg−1 at a power density of 263.3 W kg−1, and it remained as high as 36.1 W h kg−1 even at 25.9 kW kg−1. It is believed that the presented work opens up a new strategy to fabricate high-performance supercapacitor electrodes.
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 SOLID STATE CHEMISTRY
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2020
·
IF 2.726
Yan Zhou,Jingtong Zhang,Fengchao Sun,Xinping Yu,Wenpei Kang,Jun Zhang
In this work, sheet-like Co 9 S 8 was directly grown on Ni 3 S 2 spheres (donate as Co 9 S 8 @Ni 3 S 2 ) via a one-step hydrothermal synthetic approach. The structural characterization of Co 9 S 8 @Ni 3 S 2 revealed that the Co 9 S 8 nanosheets were perpendicularly arrayed on Ni 3 S 2 spheres. This heterostructure thus fixes the two-dimensional Co 9 S 8 in position on Ni 3 S 2 spheres to obtain a stable heterostructural material. Due to the strengthened morphological structure, high surface area, metallic feature of Co 9 S 8 and Ni 3 S 2 , and the synergetic effect, the Co 9 S 8 @Ni 3 S 2 showed excellent performance in sodium ion battery (SIB) anode and HER cathode. The electrochemical tests showed that Co 9 S 8 @Ni 3 S 2 can demonstrate excellent HER catalytic activity with only −0.16 V and −0.23 V overpotential needed to achieve 10 mA cm −2 and 100 mA cm −2 current density in acidic condition. Besides, Co 9 S 8 @Ni 3 S 2 heterostructure as an anode in SIB also delivered high discharge capacity of 699 mAh g −1 at 0.5 A g −1 current density in the first cycle, with 92% Columbic efficiency.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Weibin Chen,Chao Chen,Lei Li,Zhan Lin
Transition metal sulfides and their hybrids are promising alternative to precious metal catalyst for the oxygen evolution reaction (OER). Herein, the high-density Co 9 S 8 nanoparticles (NPs) embedded in N-doped carbon has been prepared by using surface-engineered zeolitic imidazolate framework-9 (ZIF-9) nanosheets as precursor. The surface of ZIF-9 was modified with TAA , which is able to create chemical barrier and prevents metal from aggregation in the subsequent pyrolysis , thus making small Co 9 S 8 NPs densely anchored on carbon layers . Arising from the unique structure, Co 9 S 8 @NC affords an optimized electronic structure and rich effective reactive sites for OER. As expected, Co 9 S 8 @NC exhibits small overpotential of 264 mV at 10 mA cm −2 , low Tafel slope of 68.4 mV dec −1 , and superior stability for alkaline OER (0.1 M KOH). The electrolysis cell , which was equipped with Co 9 S 8 @NC cathode and Pt/C anode, shows low water splitting voltage of 1.58 V at 10 mA cm −2 in 1.0 M KOH. This work employs an efficacious surface engineering strategy to design metal sulfide-based electrocatalysts for enhancing OER performance.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Qin Wu,Ruichen Chen,Pengju Su,Daxin Shi,Yaoyuan Zhang,Kangcheng Chen,Hansheng Li
Carbon-based materials derived from metal-organic framework compounds have tunable chemical composition , morphology, and electrochemically active surface combined with good electrical conductivity and stability. In this work, Fe(OH) 3 grows on a zeolitic imidazolate framework , 2-Methylimidazole cobalt salt (ZIF-67), through oxidation and deposition. The Co 9 S 8 /NC@FeCoS 2 /NC composites with hollow yolk shell structure (HYS-Co 9 S 8 /NC@FeCoS 2 /NC) is prepared through solvothermal sulfidation combined with high-temperature carbonization using ZIF-67@Fe(OH) 3 as the precursor. A dye-sensitized solar cell assembled with HYS-Co 9 S 8 /NC@FeCoS 2 /NC as a counter electrode achieves a photovoltaic conversion efficiency of 7.07% (PCE Pt = 7.36%). The reason for this phenomenon is that the hollow yolk shell structure of Co 9 S 8 /NC@FeCoS 2 /NC material has a high specific surface area, which affords a good deal of active sites and promotes the contact between electrolyte and catalytic sites. The Fe-Co bimetal center synergies with each other to catalyze the reduction of iodide ion, showing a high catalytic activity. Besides, the material has good electrochemical stability in iodide-based electrolysis.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Huanzhong Zeng,Rui Liu,Yuanyou Peng,Jiyi Sun,Junlong Chen,Jinling Li,Jianzhou Niu,Fuliang Zhu,Fen Ran
Carbon-based composites with nano dispersed transition metal sulfides (TMS)/transition metal phosphides (TMP) are successfully prepared using a bio-assisted strategy, where non-ferrous metals in leaves are converted to TMS and those in stems are converted to TMP. Carbon films obtained from the conversion of naturalized bioreactor (plant cells) membranes not only successfully achieve the nano-materialization of TMS/TMP, but also ensure good conductivity and can effectively accommodate the volume changes during cycling and maintain structural integrity. Besides, nonferrous metals will also optimize the dense structure of leaf-derived carbon during calcination, exposing more active sites and ion transport channels. Benefiting from these, the as-prepared carbon-based cobalt sulfide composite (CdL Co) exhibits excellent electrochemical performance as an anode for lithium-ion batteries (LIBs), including high reversible capacity, outstanding cycling stability, and good rate performance. Especially after 1, 000 cycles under 1 A g −1 , a high reversible capacity of 441 mAh g −1 can still be maintained. Besides, the dual-conversion achieved by this bio-assisted strategy can also be used to explore the preparation of nanocomposites for other applications, with universality.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 40
·21353-21361
·
IF 8.867
Hao Li,Zheng Guo,Xinwei Wang
The oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are the key processes in many renewable energy conversion systems, and the development of high-performance non-precious bifunctional OER/ORR electrocatalysts is of crucial importance for various energy conversion devices, such as rechargeable metal–air batteries and regenerative fuel cells. Herein, we report a novel efficient bifunctional OER/ORR catalyst of Co9S8/CNT, which is synthesized using an advanced technique of atomic layer deposition (ALD) for conformally coating a uniform thin layer of Co9S8 on a high-surface-area carbon-nanotube (CNT) network scaffold. The ALD-synthesized Co9S8/CNT catalyst displays remarkable electrocatalytic performance with excellent catalytic activity and stability toward both the OER and ORR, and is further demonstrated to be a superior bifunctional oxygen catalyst for high-performance rechargeable Zn–air batteries. The fabricated aqueous rechargeable Zn–air batteries are able to deliver a remarkably high power density with superior long-term cycling stability, and the fabricated solid-state rechargeable Zn–air batteries are able to display very good flexibility and stability upon bending. Therefore, we believe that the ALD-synthesized bifunctional Co9S8/CNT electrocatalyst will have broad and promising applications for renewable energy conversion devices.
研究领域:
材料科学
·
电化学
·
能源转换与存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xin Cui,Xiaoyang Yang,Zeyi Liu,Wei Jiang,Jiafeng Wan,Yifu Liu,Fangwei Ma
Construction of Prussian blue analogues (PBAs) with heterostructure is beneficial to preparing PBAs derivatives with superior electrochemical performance. In this work, the core–shell nanostructured nanocubes composed of nickel hexacyanocobalt PBA (NiCo-PBA)@cobalt carbonate hydroxide (CCH) are synthesized through an in-situ epitaxial growth strategy, and the formation mechanisms of coating are carefully validated and specifically discussed. Then, the precursors are successfully transformed into hierarchical CoNi 2 S 4 /Co 9 S 8 @Co 4 S 3 via the gas-phase vulcanization method. Benefiting from the intriguing heterostructure and multicomponent sulfides, the CoNi 2 S 4 /Co 9 S 8 @Co 4 S 3 -80 electrode exhibits a high specific capacity of 799 ± 16C/g (specific capacitance of 1595 ± 31F/g) at 1 A/g, ultra-high capacity retention of 80 % at a high current density of 20 A/g. The assembled asymmetric supercapacitor (ASC) device delivers a high energy density of 43.3 Wh kg −1 at a power density of 899 W kg −1 and exhibits superior cycling stability with the capacity retention of 88 % after 5,000 cycles. Subsequently, the fabricated all-solid-state ASC device shows an excellent energy density of 36.4 Wh kg −1 with a power density of 824 W kg −1 . This work proposing rational design of combining multicomponent sulfides and core–shell heterostructure based on PBA nanocubes opens up a novel route for developing asymmetric supercapacitor electrode materials with superior performance.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Lian Liu,Yujin Li,Yaoyu Zhang,Xueni Shang,Cuimeng Song,Fanbin Meng
Supercapacitors attract tremendous research attention due to the cost-effectiveness, high power capacity and environment-friendly in the field of energy storage. In this work, Ni 3 S 2 thin-layer nanosheets coupled with Co 9 S 8 nanoparticles anchored on 3D cross-linking composite structure 5 mLCNT@MXene matrix (Ni/Co@C 5 M) was successfully synthesized via two-step hydrothermal and subsequent annealing treatment, possessing excellent electrochemical performance in terms of high rate capability, superior reversible capacity and outstanding durability. The electrode materials have distinct 3D cross-linking composite structure characteristics, which can significantly boost capacitive storage performance due to the introduction of CNT cross-linking conductive bridges and sulfides. Meanwhile, CNT can also prevent re-stacking of MXene layers and improve the electrical conductivity. As expected, the specific capacitance of Ni/Co@C 5 M electrode is 1827.5 F g −1 at 1 A g −1 , which retains 88.57% after 10,000 cycles at a high current density of 30 A g −1 in cycling stability. Notably, an asymmetric supercapacitor (Ni/Co@C 5 M as the negative electrode and AC as the positive electrode, Ni/Co@C 5 M // AC) has exceptionally high energy density up to 78.4 Wh kg −1 at a power density of 699.3 W kg −1 and long capacitance retention of 86.67% at 20 A g −1 for 10,000 cycles. The designed Ni/Co@C 5 M // AC asymmetric supercapacitor in this work holds a promising future for the upgrading new high-performance energy storage device.
研究领域:
储能
·
材料科学
·
电化学
·
纳米材料
·
超级电容器
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Kaifeng Zhao,Youwei Zhao,Menghui Hao,Xiaoting Li,Shuang Liu,Ling Li,Wenming Zhang
Synthesis of non-precious metal materials with cost-effective and excellent electrocatalytic activity as counter electrode (CE) of dye-sensitized solar cells (DSSCs) remains a challenge. Herein, MOF-based self-sustaining template and ion exchange method are developed to fabricate Co 9 S 8 and Ni 9 S 8 loaded on N-doped porous carbon nanocage materials (Co 9 S 8 /Ni 9 S 8 @C-N) with large specific surface area and remarkable catalytic activities to the reduction of I 3 − ions. The excellent performance of Co 9 S 8 /Ni 9 S 8 @C-N is owing to the synergistic effect of Ni 9 S 8 and Co 9 S 8 can further improve the catalytic activity and N-doped porous carbon nanocage as a good conductor provides a suitable place for the redox reaction and guarantees the stability of the material. As a CE catalytic material, Co 9 S 8 /Ni 9 S 8 @C-N reveals excellent catalytic activity and stability, making the photoelectric conversion efficiency (PCE) 17.54% higher than Pt CE. The Co 9 S 8 /Ni 9 S 8 @C-N composite material reveals the remarkable potential as a CE in the DSSCs.
研究领域:
材料科学
·
可再生能源
·
电化学
·
纳米材料
·
太阳能电池
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）