JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Donghong Duan,Kaixin Chen,Chongzhi Xing,Xiaoqiang Wang,Xianxian Zhou,Shibin Liu
The development of lithium-sulfur (Li-S) batteries necessitates the creation of efficient cathode materials . By simultaneous phosphating and sulfurating, a spindle-shaped CoP-Co 3 S 4 heterostructure sulfur cathode substrate made up of numerous tiny needle-like structures is created. The benefits of CoP with outstanding conductivity and Co 3 S 4 with great adsorption capacity are combined in the as-prepared CoP-Co 3 S 4 heterostructures, which achieve efficient capture-diffusion-transformation of polysulfides at the interface. The CoP accelerates the redox kinetics toward polysulfide conversion, and the Co 3 S 4 has a considerable adsorption power toward polysulfides. The quick nucleation of polysulfide and increased capture effectiveness are aided by the quick transfer of polysulfide from the Co 3 S 4 surface to the CoP surface. As a result, the CoP-Co 3 S 4 @S cathode battery with a 1.1 mg cm −2 sulfur load achieves a high initial capacity of 1516.9 mAh g −1 at 0.2 C and maintains that capacity after 100 cycles at 750.1 mAh g −1 . After 300 cycles, even the 565.1 mAh g −1 specific capacity can be attained at 1 C.
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 COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yihua Cao,Xueli Yin,Yonghao Gan,Ying Ye,Run Cai,Bo Feng,Qi Wang,Xiaoping Dai,Xin Zhang
Designing bifunctional electrocatalysts with high efficiency and low cost for water splitting is urgently required for the production of green hydrogen. Herein, a bifunctional iron-doped cobalt borate/cobalt phosphide hybrid supported on nickel foam (Fe-CoB i /CoP/NF) was fabricated via hydrothermal and phosphating process. Benefit from the unique nanoneedle architecture for faster mass transfer, the existence of borate on CoB i for accelerating proton transfer , the moderate adsorption of H* species on CoP, Fe doping and the synergistic effect between CoB i and CoP, Fe-CoB i /CoP/NF hybrid exhibits a low overpotential of 137 mV and 260 mV at 100 mA cm −2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Moreover, Fe-CoB i /CoP/NF||Fe-CoB i /CoP/NF also presents a low cell potential of 1.65 V@100 mA cm −2 for overall alkaline water splitting and excellent durability (128 h) without decay. This work provides a new insight into the design of bifunctional electrocatalysts simultaneously through the morphological engineering and heteroatomic doping.
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 Materials Chemistry A
·
2022
·Vol. 10
·期 36
·18907-18915
·
IF 14.511
Xuefan Zheng,Yuqi Wu,Cheng Li,Jinxue Peng,Wu Yang,Zhongwei Lv,Haoyue Zhong,Zhengliang Gong,Yong Yang
All-solid-state lithium–sulfur batteries (ASSLSBs) are promising candidates for the development of next-generation batteries with high energy density and improved safety. Nevertheless, the sluggish reaction kinetics of the S and Li2S cathode and the low active material content hinder the further development of ASSLSBs. Herein, a Co3O4@nitrogen-doped carbon (Co3O4@NC) nanocomposite is used as an electronically conductive additive to promote the conversion kinetics of S and Li2S in the solid sulfur cathode. With a high sulfur content of 50 wt% and sulfur loading of 4 mg cm−2, ASSLSBs with the S–Co3O4@NC–Li7P3S11 (S–CoNC–LPS) composite cathode exhibit a high specific capacity of 1313 mA h g−1 at 0.2 mA cm−2, as well as a reversible capacity of 1167 mA h g−1 after 100 charge/discharge cycles. Furthermore, the S–CoNC–LPS cathode also demonstrates a high areal capacity of 16.12 mA h cm−2, corresponding to a reversible capacity of 1343 mA h g−1, and good cycling stability even with an ultra-high sulfur loading of 12 mg cm−2. Such a superior electrochemical performance can be attributed to the fact that Co3O4@NC lowers the reaction energy barrier and promotes the interconversion of S and Li2S.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Guozhen Liu,Xinguang Yuan,Yanmin Yang,Jianming Tao,Yubin Chi,Lixun Hong,Zhiya Lin,Yingbin Lin,Zhigao Huang
Wreath-like Co 3 O 4 particles consisting of microplates are synthesized by a facile solvothermal method and subsequently surface-modified with TiO 2 ultrathin layer using a low-temperature hydrolysis process. Comparing with pure Co 3 O 4 , Co 3 O 4 @TiO 2 exhibits superior electrochemical performances in terms of reversible capacity, rate capability and cycling stability. Co 3 O 4 @TiO 2 exhibits high reversible capacity of 813.0 mAhg −1 at 500 mAg −1 after 180 cycles while the pristine Co 3 O 4 only has a discharge capacity of 512.5 mAhg −1 . The filling of TiO 2 nanoparticles in porous Co 3 O 4 sheets and the TiO 2 -coating on Co 3 O 4 surface, could effectively suppress large volume expansion of Co 3 O 4 and consequently enhance structural stability during the Li-ion insertion/extraction processes. Analysis from the electrochemical measurements reveals that the improved performances should be attributed to reduced the charge-transfer resistance and enhanced Li-ion diffusion kinetics because of TiO 2 -coating. In addition, the reduced work function induced by TiO 2 -coating is helpful to facilitate electron transfer in composites. Moreover, the built-in electric field resulting from the difference in work function between Co 3 O 4 and TiO 2 , would facilitate electron-transfer and Li-ion migration across heterojunction interfaces.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2013
·
IF 4.675
Bin Zhang,Yibo Zhang,Zhenzhen Miao,Tianxiao Wu,Zhendong Zhang,Xiangguang Yang
Two kinds of Co 3 O 4 samples with micro/nano-structure as high capacity anode materials for Lithium-ion Batteries are synthesized by a facile method. The structure, composition and surface morphology are analyzed by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM), respectively. The XRD data indicates that the two Co 3 O 4 materials are crystalline, single-phase without any impurity phase; the size of spheres and cubes are estimated to be 2 μm and the nanoparticles are around 100 nm. The cyclic voltammetry and discharge/charge measurements are carried out to detect the electrochemical properties . The results demonstrate that the two Co 3 O 4 electrodes with micro/nano-structure exhibit low initial irreversible capacity and superior cycling performance. The two Co 3 O 4 materials with micro/nano-structure are confirmed to combine the advantages of the micro-materials and nano-materials for LIBs. Moreover, the Co 3 O 4 spheres (s-Co 3 O 4 ) exhibit more superior cycling performance than that of Co 3 O 4 cubes (c-Co 3 O 4 ) due to the larger void volume in spheres than that in cubes structure.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Liang Chen,Xin Li,Chenxi Xu,Fujia Wang,Wei Wang,Gangyong Li,Minjie Zhou,Binhong He,Wenyuan Xu,Zhaohui Hou
The design and exploitation of advanced transition metal oxides (TMO)/carbon hybrid anodes remain significant but challenging for the evolution of lithium–ion batteries (LIBs). In this work, Co 3 O 4 nanodots anchored into 2D N-doped carbon nanosheets (Co 3 O 4 NDs/NCN) hybrid is successfully fabricated by a facile salt-template assisted pyrolysis strategy using glucose, Co(NO 3 ) 2 ·6H 2 O and NaCl salt template as reaction precursors. The morphology, structure and composition of the resultant Co 3 O 4 NDs/NCN hybrid are systematically investigated, and the effect of salt template on the preparation of products is also deeply explored. It is surprisingly found that the introduction of NaCl template promotes the formation of Co 3 O 4 , which is different from what has been reported previously. In addition, the added NaCl template can be used to regulate the microstructure of Co 3 O 4 NDs/NCN hybrid, which displays unique micromorphology (Co 3 O 4 NDs anchored into 2D NCN), successful N doping in carbon matrix, Co-N-C bond between two components and much increased specific surface area. As a result, this hybrid shows excellent lithium storage performance when used as the anode for LIBs, which can be comparable to those previously reported Co 3 O 4 /C hybrid anodes. Clearly, this work offers a good reference for the construction of low-cost and high-performance TMO/carbon LIBs anodes.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2018
·Vol. 8
·期 1
·1-11
·
IF 4.122
Abdalla Ibrahim,Shen Jiali,Yu Jianyong,Li Zhaoling,Ding Bin
Electromagnetic (EM) wave absorbing materials have been fabricated from diverse materials such as conductive polymers, carbon based nanostructures and magnetic metal oxides. Nevertheless, it has remained a great challenge to develop lightweight and high-efficiency EM wave absorbing materials with a broad frequency range. Herein, we report a scalable strategy to create Co 3 O 4 /carbon composite nanofibrous membrane by electrospinning technique followed by stabilization and carbonization processes. An optimal reflection loss (R L ) value of 36.27 dB is reached at 13.76 GHz for a layer of 2 mm thickness. RL exceeding −20 dB can be realized in any interval within the 4.5–14.4 GHz range by selecting a proper thickness of the absorbing layer between 1 and 5 mm. The Co 3 O 4 /carbon composite nanofibrous membrane could be well served as promising and attractive candidates for lightweight and enhanced EM wave absorbing materials. This presented research provides an innovative and effective approach to design the novel EM wave absorbing material in a broad frequency range for practical applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Tong Zhang,Yuxin Zhao,Fangxun Liu,Man Zheng,Kun Shi,Jinpeng Liu,Yuena Sun,Yufan Zhang,Huan Wang
In this work, we prepared a novel material of cobalt nanorods@ cobalt-platinum nanoparticles using a facile, green method. We used a hydrothermal method to first synthesize a cobalt nanorod, which was used as a substrate material on which a ZIF-67 MOF structure was controllably loaded, and then, platinum was loaded into the MOF using a redox substitution reaction, resulting in the formation of a new type of nanocomposites , cobalt nanorods@ cobalt-platinum nanoparticles. The composites were successfully doped with a small amount of precious metal platinum into cobalt nanorods @ cobalt MOF by replacement method, which combines the unique structure of cobalt nanorods , cobalt MOF and high electrocatalytic performance of platinum, realizes the organic combination of precious metal-transition metal and effectively improves the electrocatalytic performance of the composites. The novel composites Co NRs@Co 10 –Pt 1 NPs exhibit high catalytic activity and stability for the hydrogen and oxygen evolution reactions , Tafel slopes is 25 mV dec −1 in HER and 56 mV dec −1 in OER. This work provides a new idea for the preparation step of novel transition metal-precious metal composites and contributes to the effective improvement of the material's performance in electrocatalytic water decomposition reaction .
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 COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Kaiyue Zhang,Bin Feng,Hong Wang,Lijie Liu,Liang Hu,Hui Zhao,Zeyu Xu,Xihao Zhang,Jianguo Liu
Vanadium flow batteries (VFBs) face critical challenges in power density due to sluggish redox kinetics and inefficient mass transport. Herein, we propose a dual-functional strategy that synergistically addresses both limitations through precursor morphology engineering. By precisely regulating hydrothermal crystallization kinetics, cobalt carbonate hydroxide (CCH) precursors evolve from 1D nanorods to 2D nanosheets, which transform into Co 3 O 4 nanoarrays after annealing while retaining structural features. The resulting 1D rod-like architectures create open mesoporous channels for rapid ion diffusion, while defective Co 3 O 4 surfaces enriched with oxygen vacancies enhance redox kinetics. DFT calculations reveal that oxygen vacancies upshift the Co d-band center in Co 3 O 4 , strengthening vanadium ion adsorption and accelerating redox reactions. Finite element analysis demonstrates that the rod-like microstructure enhances mass transport and reduces concentration polarization, while its uniform potential distribution suppresses parasitic side reactions. As a result, the VFB with Co 3 O 4 @CF-90 achieves a high energy efficiency of 74.4 % at 300 mA cm −2 , outperforming conventional carbon felt by 9.7 %, and maintains 80.2 % efficiency at 200 mA cm −2 over 400 cycles. This work establishes a scalable morphology-induced vacancy engineering paradigm for high-performance flow battery electrodes, decoupling catalytic and transport optimization through precursor design.
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
ChemElectroChem
·
2018
·Vol. 5
·期 7
·1080-1086
·
IF 4.446
Qianfeng Liu,Zhiping Chen,Zhao Yan,Yao Wang,Erdong Wang,Sheng Wang,Shudong Wang,Gongquan Sun
Graphical Crystal plane activity : Spinel Co 3 O 4 nanomaterials are synthesized controllably with the specified morphologies of nanocubes, nanosheets, and nanoplates that exhibit different exposed planes: {100}, {110}, and {111}, respectively. The effects of the crystal planes on the activity for the oxygen evolution, oxygen reduction, and hydrogen evolution reactions are investigated in alkaline media. Insights into the relationship between the crystal planes of metal oxides and the catalytic activity of the oxygen evolution reaction (OER), oxygen reduction reaction (ORR), and hydrogen evolution reaction (HER) are essential for developing efficient renewable energy technologies. Herein, spinel Co 3 O 4 nanomaterials were synthesized controllably with the specified morphologies of nanocubes, nanosheets, and nanoplates with different exposed planes of {100}, {110}, and {111}, respectively. The effects of the crystal planes of Co 3 O 4 on the activity for the OER, ORR, and HER were subsequently investigated in alkaline media. Different electrocatalytic performances are possibly attributed to the abundance ratios of Co 3+ /Co 2+ over the different exposed planes. The surface Co 3+ ions exhibit higher activity for the OER and HER, whereas the surface Co 2+ ions exhibit better performance for the ORR; moreover, higher electroconductivity enhances the polarization current for ORR and HER except OER.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2019
·Vol. 93
·期 10
·2067-2071
·
IF 0.581
Jianfeng Dai,Zhu Xiaojun,Liu Jifei,Wang Qing,Li Weixue,Qi Yufeng
Abstract Nanostructuring is a promising approach to the problems of low diffusion coefficient of transition metal oxides anodes. Co 3 O 4 nanofibers electrode materials were successfully synthesized by electrospinning followed by controlled pyrolysis. Electrode materials based on Co 3 O 4 nanofibers applied as anode for lithium-ion batteries (LIBs) show high discharge-charge specific capacity of 595 and 527 mA h g –1 at 0.5C, respectively. Further electrochemical investigation reveals that Co 3 O 4 nanofibers exhibiting high specific capacity (300 mA h g −1 at 0.5C after 200 cycles), the capacity fading is only 11.8% after 200 cycles. Further electrochemical studies reveal that these excellent electrochemical properties should be attribute to the ordered ions diffusion pathway originated from the one-dimensional nanostructure and continuous fibrous network structure. These results revealed that the Co 3 O 4 nanofibers are promising anode materials for LIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 16
·7564-7571
·
IF 6.233
Jie Sun,Haimei Liu,Xu Chen,David G. Evans,Wensheng Yang
Superposed cobalt(II)–cobalt(III) layered double hydroxide (CoII–CoIII-LDH) nanoplates were synthesized by an oil droplet template method, in which the main steps are as follows: LDH nanosheets were first assembled on an oil droplet template to form a multishell sphere, and then the oil droplet was easily removed under centrifugal force due to its very different density from that of the assembled LDH shell. This resulted in the multishell spheres being split open to create superposed LDH nanoplates. The resulting material has a three-stage architecture, namely, the primary building blocks of nanosheets, the secondary architecture of shells derived from the nanosheets, and the long-range architecture of superposed nanoplates assembled from the vertically stacked shells. Most importantly, the as-fabricated LDH-based hierarchical structure can be readily converted to a Co3O4/C composite via calcination, without obvious structural alteration, where the residual surfactant is the source of the carbon. When used as an anode material for Li-ion batteries, the Co3O4/C electrode exhibits an excellent electrochemical performance, which is attributed to the unique hierarchically porous structure.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 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）