Materials Today Energy
·
2021
·
IF 7.311
H. Gui,Y. Li,D. Du,F. Liang,Z. Yang
A new method is proposed to fabricate high-performance phase change material capsules with high thermal storage capacity and increased thermal conductivity . The capsules are achieved by free radical polymerization against the example paraffin/water emulsions stabilized with Janus particles (JPs). It is key that the highly conductive Ag-contained JP adopt parallel lying at the emulsion interface, which is responsible for increasing the interfacial thermal conductivity. Thermal storage capacity can be retained over 90% with no paraffin leakage, which is stable after many cycles of heating and cooling. The high-performance phase change material capsules are promising in effective thermal management in the form of either powder or slurry.
研究领域:
材料科学
·
热能工程
✓ 已验证
DOI
高影响因子
Nanoscale Research Letters
·
2017
·Vol. 12
·期 1
·1-6
·
IF 2.833
Zhai Haifa,Liu Hairui,Li Hongjing,Zheng Liuyang,Hu Chunjie,Zhang Xiang,Li Qiling,Yang Jien
Porous- and hollow-structured LiNb 3 O 8 anode material was prepared by a hydrothermal-assisted sintering strategy for the first time. The phase evolution was studied, and the formation mechanism of the porous and hollow structure was proposed. The formation of the unique structure can be attributed to the local existence of liquid phase because of the volatilization of Li element. As the anode material, the initial discharge capacity is 285.1 mAhg −1 at 0.1 C, the largest discharge capacity reported so far for LiNb 3 O 8 . Even after 50 cycles, the reversible capacity can still maintain 77.6 mAhg −1 at 0.1 C, about 2.5 times of that of LiNb 3 O 8 samples prepared by traditional solid-state methods. The significant improvement of Li storage capacity can be attributed to the special porous and hollow structure, which provides a high density of active sites and short parallel channels for fast intercalation of Li + ions through the surface.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Meng Ning,Guojian Qiu,Xinying Wang,Bingbing Li,Zhenghui Li,Haiyan Zhang
Although great progress has been made in carbon anodes for potassium-ion batteries, the development of advanced carbon anodes with fast reaction kinetics and high cycle stability is still a great challenge due to the large radius of K + (0.138 nm). In this work, novel ultrathin carbon nanosheets (UCNs) fabricated by vapor-induced bubbling strategy are reported to address current challenge. The results show that the UCNs are composed of 3D interconnected 30 nm-thick sheet units with well-developed hierarchical micro-/meso-/macro-pores, which can not only increase the contact area between electrode/electrolyte, but also effectively buffer the volume expansion caused by the (de)potassiation. In addition, UCNs have a carbon composite structure of intertwined pseudo-graphite domains and amorphous carbon domains, providing abundant storage active sites and fast transport channels for K + . Specifically, the UCN-1300 delivers a K + storage capacity of ≈350 mAh g −1 at a current density of 0.05 A g −1 . Moreover, it presents excellent cycle stability, maintaining a capacity of 120 mAh g −1 after 5000 cycles at a current density of 5 A g −1 , with a capacity retention rate of more than 99%. In prior reports, carbon anodes demonstrating such a high K + storage capacity and outstanding cycle stability are rarely obtained.
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
·
2022
·
IF 6.371
Hui Liang,Hao Zhang,Yi Zong,Heng Xu,Jun Luo,Xijun Liu,Jie Xu
Doping engineering is an effective strategy to improve the hydrogen storage capacity of magnesium-based materials. Here, we report a magnesium composite containing trace amounts of nickel catalyst (Ni-Mg), in which Ni and Mg layers form a new structural phase. The test shows that Ni-Mg composite has a hydrogen storage capacity of 7.5 wt%, with rapid absorption/desorption kinetics and stable reversible absorption/desorption performance on cycling. Ni-Mg exhibits a superior hydrogen storage performance as compared to the MgNi alloys and Mg-based materials previously reported in the literature. We conclude that a new MgNi phase and MgNi 2 intermetallic compound are formed during the H 2 adsorption process . Based on the theoretical calculations, we show that Ni facilitates hydrogenation by accelerating the dissociation of H 2 molecules into the H atoms, while the MgNi phase formed during the hydrogenation is conducive to the subsequent dehydrogenation, promoting H atoms diffusion between the subsurface and the surface. This work provides a guidance for the development of the efficient hydrogen storage materials .
研究领域:
材料科学
·
能源研究
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Bin Wang,Yu Dong,Zihao Zeng,Hai Lei,Yue Yang,Peng Ge
Attracted by the potential value of spent lithium-ion batteries, their high effective-recycling has been devoted to numerous attentions. Unfortunately, spent graphite is always used as fossil fuel, accompanying with the serious resources wasting and carbon emission. Owing to low-cost and energy-consumption, their direct regeneration has been regarded as the next-generation key technology. Although high-temperature sintering can induce the recovering of internal structure, they still suffer from strong surface anisotropy. Herein, through the introduction of coating-layer, their infiltration abilities and isotropy are effectively improved. And, their physical-chemical properties can be recovered to that of commercial materials, containing compact-density, impurities-content and conductivities. The as-regenerated sample delivers a Li-storage capacity of 324 mA h g −1 at 1.0 C after 250 cycles. Even at high rates, their specific capacity can be still kept at about 286 mA h g −1 after 300 loops. Assisted by detailed electrochemical analysis, the pre-storage role of surface/near-surface layer is successfully confirmed, accompanied by stable charge balance. Moreover, its diffusion energy barrier of layers is further decreasing, accompanying with the considerable ion-diffusion behaviors. Therefore, the work is anticipated to provide significant surface-tailoring strategy for spent graphite, meanwhile illustrating the in-depth understanding of carbon-layers effect.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2025
·
IF 3.2
Zhu Xueli,Yin Xiangru,Zhang Yinan,Mei Qiqi,Bai Jinshuo,Yang Guixiang,Zhang Dequan,Liang Xiaoping
V 2 O 5 films with high ion storage capacity (Q) and wide optical modulation range (∆T) have great potential for application in electrochromic devices. In this paper, Ni-La-V 2 O 5 porous ion storage films are prepared by the sol–gel method. The effects of Ni-La co-doping content, PEG content, and heat treatment temperature on the properties of V 2 O 5 films were investigated. By comparison, it was found that the Q value of 9 mol% Ni-5.5 mol% La-V 2 O 5 film was increased compared to 9 mol% Ni-V 2 O 5 film, but ∆T was decreased. In order to improve ∆T, Ni-La-V 2 O 5 porous ion storage films were prepared using Ni-La co-doping and PEG pore-former, and the optimization of process parameters was carried out via Response Surface Methodology (RSM). The RSM results showed that the influence on the Q value was in the following order: heat treatment temperature > Ni-La co-doping content > PEG content. Under the near-optimal process parameters, a satisfying V 2 O 5 film with a high Q value (120.23 mC/cm 2 ), a good ∆T (79.8%), and a short response time (3.1 s/2.8 s) were obtained, which further demonstrated the superior electrochromic performance. Graphical
研究领域:
材料科学
·
电致变色技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Jianhua Yu,Xiancai Pang,Qunchao Yin,Di Chen,Hongzhou Dong,Qian Zhang,Jing Sui,Lina Sui,Lifeng Dong
Constructing self-supporting porous electrode material with abundant electrochemical active sites can effectively improve the energy storage capacity of supercapacitors . Herein, a novel electrode material (NCS@Co-ZIF/NF) is developed by depositing zeolitic imidazolate frameworks (Co-ZIF) on nickel foams (NF), which is adopted as a precursor (Co-ZIF/NF) to electrodeposit nickel-cobalt sulfides (NCS). The nanosheet arrays with cross-porous structures provide NCS@Co-ZIF/NF with excellent electrochemical characteristics, including a high specific capacity of 144.4 mAh g −1 at the current density of 1 mA cm −2 , 60.5% capacity retention at 50 mA cm −2 , and superb long-term cycle stability. Furthermore, NCS@Co-ZIF/NF//AC hybrid supercapacitor is fabricated by using NCS@Co-ZIF/NF as positive electrodes and activated carbon (AC) as negative electrodes , which exhibits a high energy density of 33.9 Wh kg −1 at a power density of 145 W kg −1 .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Ying Su,Xiaodong Liu,Haoyu Wang,Yijia Hao,Lianyue Guan,Weilin Chen
Designing friction materials with high electron storage capacity, high work function, low cost, and high stability is an important method to improve the output performance of a triboelectric nanogenerator (TENG). Here, we report two kinds of friction materials based on Keggin-type polyoxometalates (POMs)-modified graphite carbon nitride (g-C3N4), namely, g-C3N4@PMo12 and g-C3N4@PW12, and form TENG with commercial indium tin oxide/poly(ethylene terephthalate) (ITO/PET) electrodes. The performance test shows that the g-C3N4@PMo12 TENG device exhibits a high output voltage of about 78 V, a current of about 657 nA, and a transfer charge of about 15 nC, which is more than 3 times higher than that of unmodified TENG. This performance improvement is attributed to the fact that POM loaded on the surface of g-C3N4 can be used as a shallow electron trap to increase the electron storage capacity through electron interaction and to increase the charge density on the surface of the material by increasing the work function of the composite. This work not only broadens the choices of TENG friction materials but also offers a practical means of enhancing TENG’s output performance.
研究领域:
材料科学
·
能源技术
·
纳米科技
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Miao Xu,Shen Wang,Shengyu Zhou,Wenhai Sun,Zhenmin Ding,Xiang Zhang,Jiupeng Zhao,Yao Li
In this study, a novel TiO 2 @C@Prussian Blue core-shell nanorod arrays film was constructed through two-step hydrothermal and electrodeposition methods. Such a designed structure could increase the specific surface area, reactive site, and conductivity of Prussian Blue (PB) and reduce the diffusion distance of ions due to the nano-architecture arrays of TiO 2 and the high conductivity of the carbon layer, thus leading to the remarkably improved storage capacity and reaction speed of ions during the electrochromic (EC) process of PB. Moreover, porous morphology and strong adhesion on the FTO substrate of the TiO 2 nanorod arrays could alleviate the lattice stress and volume expansion and enhance the binding force, thus improving the cycle stability of EC. Given these benefits, the TiO 2 @C@PB films display a large optical modulation range (67%), fast switching speed (t c /t b = 1.25 s/2.71 s), and high coloration efficiency (129.4 cm 2 /C). In particular, the EC cycle stability is remarkably improved (96.3% after 5000 cycles), implying a promising application in high-performance EC devices (ECDs).
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
W.W. Yan,Y.F. Yuan,J.Y. Xiang,Y. Wu,T.Y. Zhang,S.M. Yin,S.Y. Guo
Triple-layered sandwich nanotubes of carbon@mesoporous TiO 2 nanocrystalline@carbon were prepared through coating hydrous titania and resorcinol-formaldehyde resin on carbon nanotubes followed by controllable crystallization and carbonization . Material characterization indicated that TiO 2 nanocrystalline with the size of 5–6 nm was uniformly assembled to the mesoporous sandwich layer of carbon nanotube-in-nanotube, leading to large specific surface area of 465.4 m 2 g −1 and large pore volume of 0.695 ml g −1 . As anode material for lithium ion batteries , triple-layered sandwich nanotubes exhibited high lithium storage capacity (244 mAh g −1 at 0.1C), good rate capability (115 mAh g −1 at 5C), and excellent cycling stability (191 mAh g −1 with coulombic efficiency of 100.2% was retained after 200 cycles at 0.2C, presenting 79% of capacity retention ratio). The superior lithium storage properties should be attributed to synergistic superiorities of TiO 2 nanocrystalline, the mesoporous sandwich layer structure and carbon nanotube-in-nanotube. These unique structural characteristics effectively reduce Li + diffusion length; enhances intercalation storage capability and pseudocapacitive interfacial storage capability of TiO 2 ; provides sufficient space to accommodate volume variation of TiO 2 nanocrystalline; increases electron conductivity and structure stability of TiO 2 . It is anticipated that the present triple-layered sandwich nanotube provides a unique carbon-based hybrid structure for other energy storage materials.
研究领域:
材料科学
·
纳米技术
·
能源存储
✓ 已验证
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 41
·30045-30054
·
IF 3.9
Yang Zhang,Linze Li,Bingwei He
Poly(3,4-ethylenedioxythiophene) (PEDOT) has emerged as a promising coating for neural electrodes especially through convenient electrodeposition methods. To investigate the influences of solvents and EDOT monomer concentrations on the electrochemical performance and structural characteristics of PEDOT, both aqueous and acetonitrile solutions were employed with varying monomer concentrations during deposition. The prepared PEDOT films were examined for the surface morphology, electrochemical performance, and chemical structures. The results showed that an increase in EDOT concentration in either solvent led to PEDOT films with improved charge storage capacity and reduced impedance magnitude. At equivalent monomer concentrations, PEDOT films generated in acetonitrile exhibited a rougher surface texture and better electrochemical performance. Notably, the growth rate of charge storage capacity of PEDOT prepared in acetonitrile relative to the deposited charge density was 2.5 times that of PEDOT prepared in water. These findings could help to the optimization of PEDOT coating preparation to enhance electrode performance.
研究领域:
材料科学
·
电化学
·
神经接口
·
涂层与薄膜
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Shijin Zhou,Wenhao Zhang,Ding Liu,Xuan Yi,Wenjia Han,Xia Li,Xingxiang Ji,Guangfan Meng,Xiaobao Li,Jiayi Chang,Jiaxin Xiong
Biomass-derived hard carbon has emerged as an anode material for sodium-ion batteries due to its cost-effectiveness and sustainability, but faces challenges in commercialization due to low sodium storage capacity and heterogeneity of precursors. This work presents a one-step acidothermal pretreatment strategy that rationally engineers walnut shell precursors through selective component modulation—effectively removing hemicellulose while reducing amorphous cellulose and acid-soluble lignin. The optimized precursor (RW-2) achieves balanced cellulose (48.9 %) and acid-insoluble lignin (49.6 %) composition with hierarchical porosity, enabling the synthesis of architecturally superior hard carbon (HC-2). The derived hard carbon (HC-2) integrates expanded interlayer spacing, hierarchical porosity, and defect-rich interfaces, synergistically enhancing sodium storage via intercalation-adsorption hybrid mechanisms. Electrochemically, HC-2 achieves a high reversible capacity (356 mAh/g at 20 mA/g), exceptional rate capability (280 mAh/g at 1000 mA/g) and sustained cyclability (79.3 % retention over 600 cycles at 1000 mA/g). By correlating precursor composition evolution with carbon microstructure, this work establishes a universal biomass engineering paradigm that decouples precursor heterogeneity from performance limitations while elucidating defect-mediated storage dynamics. The strategy provides a scalable pathway toward sustainable, high-performance sodium-ion battery anodes, bridging agricultural waste valorization with advanced energy storage technologies.
研究领域:
材料科学
·
储能技术
·
电化学
·
纳米技术
·
可持续化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）