JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yuantao Li,Jiajun Zhu,Jiyang Xie,Yongyun Mao,Wanbiao Hu
Constructing three-dimensional (3D) hierarchical bimetallic pseudocapacitive materials with abundant opening channel and heterojunction structures is rather promising but still challenging for high-performance supercapacitors. Herein, a self-sacrifice-template epitaxial growth strategy was proposed for the first time to construct 3D hierarchical bimetallic pseudocapacitive material. By using this strategy, NiCo 2 O 4 nanowires (NiCo 2 O 4 NW) arrayed randomly to form a porous shell via in-situ epitaxial growth fully enclosing a MnO 2 tube core, forming multiple transport channels and nano-heterojunctions between MnO 2 and NiCo 2 O 4 NW, which facilitates electron transfer, i.e. exhibiting high electronic conductivity than any single component. As a result of the self-sacrifice-template epitaxial growth method, special hollow tectorum-like 3D hierarchical structure with considerable inter-nanowire space and hollow interior space enables easy access of electrolyte to NiCo 2 O 4 NW surface and MnO 2 core, thereby resulting in highly exposed redox active sites of MnO 2 core and NiCo 2 O 4 NW shell for energy storage. Comprehensive evaluations confirmed MnO 2 @NiCo 2 O 4 NW was a supercapacitor electrode candidate, delivering a superior energy density of 106.37 Wh kg −1 . Such performance can be ascribed to the synergistic coupling effect of 3D hierarchical tube and nano-heterojunction structures. The proposed self-sacrifice-template epitaxial growth strategy provides important guidance for designing high-performance energy storage materials.
研究领域:
材料科学
·
储能技术
·
纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 7
·1229
·
IF 5.3
Jing Li,Jun Li,Meng Shao,Yanan Yan,Ruoliu Li
At present, binary bimetallic sulfides are widely studied in supercapacitors due to their high conductivity and excellent specific capacitance (SC). In this article, NiCo-S nanostructured hybrid electrode materials were prepared on nickel foam (NF) by using a binary metal–organic skeleton as the sacrificial template via a two-step hydrothermal method. Comparative analysis was carried out with Ni-S and Co-S in situ on NF to verify the excellent electrochemical performance of bimetallic sulfide as an electrode material for supercapacitors. NiCo-S/NF exhibited an SC of 2081 F∙g−1at 1 A∙g−1, significantly superior to Ni-S/NF (1520.8 F∙g−1at 1 A∙g−1) and Co-S/NF (1427 F∙g−1at 1 A∙g−1). In addition, the material demonstrated better rate performance and cycle stability, with a specific capacity retention rate of 58% at 10 A∙g−1than at 1 A∙g−1, and 75.7% of capacity was retained after 5000 cycles. The hybrid supercapacitor assembled by NiCo-S//AC exhibited a high energy density of 25.58 Wh∙kg−1at a power density of 400 W∙kg−1.Keywords:MOF;self-sacrificing template;transition metal sulfides;supercapacitor
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
ACS Omega
·
2020
·
IF 2.87
Zewen Zhang,Yueping Bao,Xun Sun,Ke Chen,Mingjiong Zhou,Liu He,Qing Huang,Zhengren Huang,Zhifang Chai,Yujie Song
Membrane separation has been widely used in water purification, and mesoporous ceramic membranes show a high potential in the future because of their high stability and resistance to harsh environments. In the current study, a novel polymer-derived ceramic silicon oxycarbide (SiOC) membrane was developed via a preceramic reactive self-sacrificed method and was further applied in a homemade dead-end system for water purification. A cyclosiloxane hybrid polymer was selected as the precursor and polydimethylsiloxane (PDMS) was used as the sacrificial template. Membrane pores were formed because of template removal during the sintering process, creating channels for water transportation. The pore size and porosity could be readily adjusted by changing the amounts and types of PDMS used in the fabrication process. The as-prepared SiOC membrane showed a high water permeability (140 LMH@2.5 bar) and high removal rate of rhodamine B (RhB), demonstrating its potential applications in water treatment. This work would provide an easy and scalable method to prepare ceramic membranes with a controlled pore size, which could be used for different water treatment applications.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 40
·7090-7096
·
IF 3.545
Chong Lin,Xiao He,Huiqin Li,Junjie Zou,Miaoling Que,Jingyang Tian,Yong Qian
Metal–organic frameworks (MOFs) are regarded as advanced materials for oxygen evolution reactions (OER) because of their large specific surface area, adjustable pore size and abundant intrinsic molecular/atomic metal active sites. However, their essential features, such as the organic-ligand-shielded metal centres and low conductivity, make their electrocatalytic potential far from being exploited. These undesired issues can be avoided by designing and constructing MOF nanoarrays (MOF NAs) on self-supporting and conductive substrates such as the carbon cloth. Transforming appropriate solid material nanoarrays into MOF NAs provides a possibility to unlock the bottleneck. Herein, we have successfully developed a general approach for the morphological and electronic modulation of Co/Ni-MOF-74 NAs with wall-like Co/Ni(OH)2 NAs as the self-sacrificing template. The wall- or spindle-like morphology of MOF-74 NAs was modulated by changing the dosage of ligand. As a result, Co/Ni-MOF-74 NAs displayed superior activity and stability to those of Co/Ni-MOF-74 prepared without the template. The Co0.5Ni0.5-MOF-74 NAs delivered a low overpotential of 244 mV at a current density of 10 mA cm−2 due to the high proportion of active high-valence Co(III) and Ni(III). The proposed strategy can be extended to obtain brick-like Ni-BDC NAs and needle-like Ni BTC MOF NAs on carbon cloth.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Xiaoyu Xie,Xiaojun He,Xiaolong Shao,Shian Dong,Nan Xiao,Jieshan Qiu
It is a challenge to synthesize low-cost carbon materials with abundant pores by a simple route for supercapacitors. Herein, layered microporous carbons (LMPCs) with the specific surface area up to 1865 m 2 g −1 are fabricated from coal tar and melamine via a directing, space-confinement and self-sacrificed template strategy coupled with in-situ KOH activation. The button-type supercapacitor fabricated from LMPCs exhibits a high specific capacitance of 274 F g −1 at 0.05 A g −1 , a good rate performance of 191 F g −1 at 20 A g −1 and a superior cycle stability with 98.8% capacitance retention after 10000 cycles. This work presents a facile strategy for mass production of LMPCs from liquid polycyclic hydrocarbon molecules for supercapacitors.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 29
·期 6
·1895-1908
·
IF 2.523
Li Jinhao,Bao Agula
The current greenhouse effect issue and climate change crisis has urged the advancement of highly efficient and cost-effective CO 2 adsorbents for environmental remediation. We present a sustainable and convenient self-sacrificed templating method for the preparation of nitrogen-doped hierarchical porous carbons (GNCK-X-Y). Glucose serves as a carbon source for the GNCK-X-Y, and graphitic carbon nitride (g-C 3 N 4 ) is used as both a self-sacrificing template and nitrogen doping agent during pyrolysis. The use of these precursors will allow for substantial cost reductions, making the designed materials considerably attractive from an industrial perspective. The adsorbents all demonstrated large specific surface areas and well-developed porosities. Furthermore, the influences of the carbonization temperature and activator on CO 2 capture performance were also systematically investigated. The samples prepared under the optimum conditions exhibit excellent CO 2 uptake capacities of up to 3.65 and 6.12 mmol/g at 25 ℃ and 0 ℃ (1 bar), respectively. The outstanding CO 2 capacity of the material can be attributed to the cooperative effect produced by its surface structure and chemical composition. Additionally, this adsorbent also displays moderate adsorption heat, high CO 2 /N 2 selectivity, excellent reusability and a certain adsorption performance at higher temperatures. These characteristics give the as-synthesized materials broad practical application prospects for CO 2 capture.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Jinglian Yang,Jing Hu,Yuhui Zheng,Jinwei Gao,Chunyu Wu,Shuilian Yan,Lu Zhang,Qianming Wang
Reactions under hydrothermal conditions between lanthanide ions and different loading hosts (phosphates, vanadates and molybdates) lead to a group of rare earth-based solid state materials. As for the cases of phosphates and vanadates, a novel self-sacrificing template route with ultrasonic assisted hydrothermal treatments has been utilized. The emission intensities of building blocks derived from yttrium (YPO 4 :Eu 3+ and YVO 4 :Eu 3+ ) were significantly stronger than their counterparts (GdPO 4 :Eu 3+ and GdVO 4 :Eu 3+ ). Ultrasonic irradiation of reaction solution ahead of hydrothermal treatments would also improve their red luminescence. In the case of molybdates , red/green emissive phosphors (BaMoO 4 : Eu 3+ and BaMoO 4 : Tb 3+ ) were achieved in the presence of polyaspartic acid as the template. Their structures and photophysical features have been investigated in detail.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Hongwei Mi,Xiaodan Yang,Yongliang Li,Peixin Zhang,Lingna Sun
Due to its high specific capacity, silicon (Si) is considered as the most promising alternative anode material for high energy density lithium-ion batteries, but it suffers from dramatic volume expansion during the charge/discharge process. Fabricating yolk-shell structure is regarded as an essential way to improve the conductivity and cycle stability of Si-based anode. In this work, we proposed a “self-sacrifice template strategy” by using polyethyleneimine (PEI) to form the void space during carbonation without acid or base etching, which was different from the colloidal templates method. The yolk-shell structured silicon@void@carbon (Si@void@C) composites were synthesized to enhance cycle stability for lithium-ion batteries, which delivered a capacity of 854.1 mAh·g −1 at the current density of 0.2 A·g −1 after 200 cycles. Our work is also expected to be extended to the synthesis of other yolk-shell structured composites and the application in energy storage, catalysis, biomedicine and other fields.
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 ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Chuncai Kong,Wenjing Lu,Jingui Zong,Fangzhao Pu,Xuanxuan Hu,Xiaojing Zhang,Zhimao Yang,Fei Wang,Hong Jin
Herein, Cu nanowires are utilized as a self-sacrificial template to synthesize CuO hollow nanotubes (HTs) by a facile wet chemical method . The HTs with a diameter 549 ± 83.6 nm and rough surface, are constructed by well-distributed curved ultrathin nanosheets . When employed as an anode electrode in Li-ion batteries, the resulting CuO HTs exhibited a high specific capacity of 736 mAh g −1 , superior rate performance and high cyclic performance. The excellent electrochemical performance of CuO HTs can be attributed to the high specific surface area, abundant unimpeded diffusion paths and high electron transfer rate due to the unique two-dimensional nanosheets structure and hollow structure. Moreover, the hollow structure provides enough space to accommodate volumetric changes and structural strain during the charge/discharge process, resulting in excellent cyclic stability. The current report presents a novel strategy to develop high-performance anodes for next-generation Li-ion 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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xianke Zhang,Li Li,Yuqiang Zeng,Jujun Yuan,Yi Yu,Xiurong Zhu,Zuzhou Xiong,Huajun Yu,Yingmao Xie
In this study, we report a facile in situ synthesis of hierarchical NiO/NiFe 2 O 4 sub-microcubes by annealing Ni 3 [Fe(CN) 6 ] 2 sub-microcubes fabricated via a one-step solution-precipitation method. The temperature-dependent magnetization curves show that there exists a collective freezing of the moments of interface spin clusters at T B ≈ 296 K , which further indicates the appearance a coupling interaction between the ferrimagnetic NiFe 2 O 4 and antiferromagnetic NiO nanoparticles . Furthermore, hysteresis loops measurements reveal the existence of an exchange bias effect in the NiO/NiFe 2 O 4 composite system . Interestingly, no training effect of exchange bias is observed, which indicates that the magnetic pinning interaction between NiFe 2 O 4 and NiO is stable and robust. Exchange bias field shows an exponential dependence on temperature and vanishes at about 150 K, which reveals the strong coupling interaction does not improve effectively the thermal stability of exchange bias effect in the current system.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Weidong Lei,Baokun Yang,Yijiao Sun,Liwei Xiao,Diyong Tang,Ke Chen,Jie Sun,Jun Ke,Yuan Zhuang
In this study, a heteroatom-doped porous biochar from waste biomass was prepared via a facile self-sacrificial template strategy for enhanced electrochemical capacitive performance. Numerous narrow pores and carbonized frameworks were formed by hydrothermally decomposing the unstable components in the biomass, which were further broadened to micropores and even larger mesopores through a molten salt activation method. The synthesized porous biochar displayed apparently increased specific surface area, up to 1138 m 2 g −1 , well-developed porous structure , and moderate heteroatom doping (5.35 at.% O and 1.02 at.% N), which offered more active storage sites and charge capacities. Consequently, the modified biochar exhibited significantly enhanced specific capacitance of 447 F g −1 at 0.2 A g −1 , which was 1.6 and 6.0 times higher than that of the samples carbonized directly by molten salt and inert reduction methods, respectively. The findings indicate that the facile self-sacrificial template synthetic route of biochar does not only provide larger pores for reducing the ion diffusion resistance, but also introduces heteroatoms into the carbon frame to increase charge mobility. Moreover, the assembled two-electrode symmetric supercapacitor presented not only a specific capacitance of 367 F g −1 with an energy density of 12.75 Wh∙kg −1 but also an excellent stability after 10000 cycles.
研究领域:
材料科学
·
能源存储
·
环境科学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 12
·1779-1788
·
IF 2.6
Songwei Ye,Zunxian Yang,Yuliang Ye,Zhiming Cheng,Hongyi Hong,Zhiwei Zeng,Zongyi Meng,Qianting Lan,Hui Zhang,Ye Chen,Jiaxiang Wang,Yuting Bai,Xudong Jiang,Benfang Liu,Jiajie Hong,Tailiang Guo,Shen Xu,Zhenzhen Weng,Yongyi Chen
A carbon layer usually covers the outside of SnS/MoS2 nanosheets produced by a traditional C-layer cladding process, resulting in a material with a lower specific surface area and fewer active sites. Therefore, it is difficult for these as-obtained SnS and MoS2 materials to be directly employed as electrode materials. There is a great need to develop a new C-layer coating process that can effectively coat active materials and simultaneously increase the specific surface area. In this study, novel SnS@C/MoS2 nanotubes were designed and synthesized by a self-sacrificing template method (SSTM). Specifically, MoO3 nanoribbons were first coated with Sn to produce Sn-MOF, and SnS@C/MoS2 nanotubes with a particular nanosheet architecture preserved were achieved via an elegant SSTM vulcanization strategy. This SSTM preparation method not only retains the nanosheet microstructure of the surface but also leaves a thin layer of amorphous carbon on the surface, which greatly improves the conductivity and effectively improves the cycling stability. In addition to above-mentioned advantages, there is a synergistic effect between the various components of the SnS@C/MoS2 nanotubes, which has a positive effect on the electrochemical performance. When used as the anode of a lithium-ion battery (LIB), the SnS@C/MoS2 composite can maintain a specific discharge capacity of 970.9 mAh g−1 after 500 cycles at a current density of 1 A g−1, and a specific discharge capacity of 778.1 mAh g−1 even after 1000 cycles at a current density of 2 A g−1. This method provides a reference for the synthesis of other nanostructured materials.
研究领域:
材料科学
·
纳米技术
·
电化学
·
能源存储
·
无机合成
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）