Small
·
2018
·Vol. 14
·期 25
·1800772
·
IF 9.598
Xuejiao Yang,Yuefei Wang,Wei Qi,Jiaxing Zhang,Liwei Zhang,Renliang Huang,Rongxin Su,Zhimin He
The photo-induced reconfigurable assembly of nanostructures via the simultaneous noncovalent and covalent polymerization of a functional ferrocene-tyrosine (Fc-Y) molecule is reported. The Fc-Y monomers can directly self-assemble into nanospheres with a smooth surface driven by noncovalent interactions. By covalent photo-crosslinking of the Fc-Y monomers, the nanospheres transform spontaneously into hollow vesicles composed of hierarchically ordered lamellar structures. It is worth noting that the formed nanostructures exhibit both reducing property for in situ mineralization of gold nanoparticles with tunable biocatalytic behavior, and the redox activity for superior energy storage capacity. The measured energy storage capacity is 31 mAh g −1 for the nanospheres, which is the highest value reported so far for peptide assemblages as supercapacitor. The results offer insights into the dynamic self-assembly of highly ordered multifunctional materials with promising applications in catalysis, sensing, energy and biomedical fields.
研究领域:
材料科学
·
生物化学
·
纳米技术
·
能源科学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 12
·1-9
·
IF 2.5
Chen Fei,Ji Cong,Chen Gang,Zhou Zhijun,Su Zhentang,Cai Wei,Gao Rongli,Fu Chunlin
(1- x )NBT- x BY( x = 0.00-0.04) ferroelectric ceramics were fabricated by a solid-state reaction method, and the crystal structure, surface morphology, dielectric, ferroelectric and energy storage properties of NBT ceramics incorporated BY were investigated in detail. Introduction of BY can transformed the phase of NBT from rhombohedral phase R3c to pseudo-cubic phase Pm3m, and make the diffraction peak shift to a lower angle with increasing BY content. Incorporating BY into NBT matrix contributes to the grain refinement for NBT ceramic, and enhances the relaxation performance to a certain extent. The largest dispersion coefficient is obtained when BY content is 0.02. In addition, the dielectric constant decreases with incorporating BY. The introduction of BY into NBT can greatly increase E b , △ P , W rec , and η , as well as a small decrease in P max . When x = 0.010, the relative best energy storage performance is obtained, W rec = 2.07 J/cm 3 , η = 31.66%, which is 10 times and 8 times higher than that of pure NBT ceramics, respectively. This work provides a strategy to strengthen the relaxation behavior and enhance the energy storage performance of ferroelectrics. These findings suggest that the instruction of BY into NBT is an effective method to improve the energy storage properties of NBT ceramic.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Jun Wang,Jiangting Wang,Guisheng Zhu,Huarui Xu,Xiuyun Zhang,Yunyun Zhao,Jian Zhang,Kunpeng Jiang,Aibing Yu
In this work, to reduce the “dead volume” due to the accumulation of synthesized products, the foam-structured NiCo 2 S 4 (FSNCS) with a specific surface area of 25.4 m 2 g − 1 was successfully synthesized by using well-dispersed SiO 2 nanospheres as the framework. The FSNCS exhibited 559.3 C g − 1 at a current density of 1 A g − 1 , which was 173.3 C g − 1 higher than the performance of the NCS synthesized without the addition of SiO 2 . Additionally, a hybrid supercapacitor is successfully assembled with FSNCS as the positive electrode and active carbon (AC) as the negative electrode. The FSNCS//AC displays maximum specific energy of 28.8 Wh kg −1 at a specific power of 375.0 W kg −1 , together with good cyclic life with 88.9% capacity retention over 5000 cycles at 8 A g − 1 . It is worth noting that the hybrid supercapacitor can provide strong power for the operation of the motor fan. The simple structure design provides an innovative and effective way to develop high-performance energy storage devices.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Hui Lv,Zuoyi Xiao,Shangru Zhai,Jingai Hao,Yao Tong,Guoxiang Wang,Qingda An
The preparation of biomass-derived carbon electrode materials with abundant active sites is suitable for development of energy-storage systems with high energy and power densities. Herein, a hybrid material consisting of highly-dispersed nickel ferrite nanoparticle on 3D hierarchical carboxymethyl cellulose-derived porous carbon (NiFe 2 O 4 /CPC) was prepared by simple annealing treatment. The synergistic effects of NiFe 2 O 4 species with multiple oxidation states and 3D porous carbon with a large specific surface area offered abundant active centers, fast electron/ion transport, and robust structural stability, thereby showing the excellent performance of the electrochemical capacitor. The best performing sample (NiFe 2 O 4 /CPC-800) exhibited a superior capacitance of 2894F g −1 at a current density of 0.5 A g −1 . Encouragingly, an asymmetric supercapacitor with NiFe 2 O 4 /CPC-800 as a positive electrode and activated carbon as a negative electrode delivered a high energy density of 135.2 W h kg −1 along with an improved power density of 10.04 kW kg −1 . Meanwhile, the superior cycling stability of 90.2% over 10,000 cycles at 5 A g −1 was achieved. Overall, the presented work offers a guideline for the design and preparation of advanced electrode materials for energy-storage systems.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Qi Liu,Chongqin Xu,Guiying Wang
In this work, a continuous thermochromic energy storage material (CTESM) was developed based on two distinct mechanisms, which provided a wider range of colors. Separate formulations of thermochromic energy storage materials were made using hexadecanol as the solvent, crystal violet lactone (CVL) as the color former, bisphenol A (BPA) as the developer, or crystal violet lactone and cresol red (CSR) interacting as color former and developer, respectively. More color changes were explored according to the above two combinations. Functional groups and thermal properties of CTESM were studied utilizing Fourier Transform Infrared, Thermogravimetry Analysis, X-ray diffraction and differential scanning calorimetry. This research indicates that the maximum color difference, which occurs in the condition that the ratio of CVL:BPA:CSR:HD is 2:1:2:140, enables transitions from blue-gray to green hues and then to red. Overall, CTESM has excellent thermal stabilities and cycling capabilities, leading to significant potential in anti-counterfeiting and sensors.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Xinhai Wang,Wensheng Yang,Shengshang Lu,Shangshu Peng,Tong Guo,Quan Xie,Qingquan Xiao,Yunjun Ruan
Aqueous potassium-ion batteries (APIBs), recognized as safe and reliable new energy devices, are considered as one of the alternatives to traditional batteries. Layered MnO 2 , serving as the main cathode, exhibits a lower specific capacity in aqueous electrolytes compared to organic systems and operates through a different reaction mechanism. The application of highly conductive graphene may effectively enhance the capacity of APIBs but could complicate the potassium storage environment. In this study, a MnO 2 cathode pre-intercalated with K + ions and grown on graphene (KMO@rGO) was developed using the microwave hydrothermal method for APIBs. KMO@rGO achieved a specific capacity of 90 mA h g −1 at a current density of 0.1 A g −1 , maintaining a capacity retention rate of >90% after 5000 cycles at 5 A g −1 . In-situ and ex-situ characterization techniques revealed the energy-storage mechanism of KMO@rGO: layered MnO 2 traps a large amount of “dead” water molecules during K + ions removal. However, the introduction of graphene enables these water molecules to escape during K + ions insertion at the cathode. The galvanostatic intermittent titration technique and density functional theory confirmed that KMO@rGO has a higher K + ions migration rate than MnO 2 . Therefore, the capacity of this cathode depends on the interaction between dead water and K + ions during the energy-storage reaction. The optimal structural alignment between layered MnO 2 and graphene allows electrons to easily flow into the external circuit. Rapid charge compensation forces numerous low-solvent K + ions to displace interlayer dead water, enhancing the capacity. This unique reaction mechanism is unprecedented in other aqueous battery studies.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Ming-Sheng Zheng,Yu-Ting Zheng,Jun-Wei Zha,Yu Yang,Peng Han,Yong-Qiang Wen,Zhi-Min Dang
The low permittivity of the polypropylene (PP) film has become a barrier for the further development of film capacitors with high energy storage density . An advanced strategy of the high-permittivity filler/polymer nanocomposite turns out to be a promising way of solving this problem. In this work, we coated ethylene propylene diene monomer (EPDM) as the shell on the surfaces of BaTiO 3 successfully to fabricate core-shell structural nanoparticles . The addition of surface rubberized BaTiO 3 into PP matrix promotes the permittivity to about 5.8, while the dielectric loss is barely changed as compared with PP itself. In addition, the elongation at break is as high as 364%, which is over 4 times higher than that of PP. The influences of shell thickness (3 nm, 5 nm and 7 nm) for the nanoparticles and hot-stretching process for the nanocomposite films were also carefully investigated, both of which greatly affected the properties of nanocomposites. Finally, the optimum breakdown strength as high as 370 MV/m is obtained, leading to a maximum energy density of 3.06 J/cm 3 , which can be attributed to both high breakdown strength and high permittivity of the core-shell structural BaTiO 3 /PP nanocomposites.
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
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Juan Zeng,Liubing Dong,Wuxin Sha,Lu Wei,Xin Guo
Most developed flexible energy storage devices lack sufficient softness and toughness to tolerate various deformations, such as stretching, compressing, twisting, folding and puncturing, meanwhile guarantee a stable energy output required for the soft human-machine interfaces and intelligent wearable electronics. In this work, all-hydrogel soft supercapacitors consisting of reversibly deformable hydrogel electrodes and electrolyte are constructed without using additional stretchable substrate or separator membrane. Both electrode and electrolyte contain the same polyacrylamide/sodium alginate dual-network hydrogel matrix, making them possess superb self-adhesion due to hydrophilic interaction/hydrogen bonds, and highly softness/toughness thanks to the energy-dissipative mechanism. After adding carbon nanotube conductive network/electrode active material and electrolyte salt/redox couple in the hydrogel matrix, the newly developed supercapacitor with all-in-one architecture is intrinsically highly stretchable/compressible and can even be deformed arbitrarily under various severe stress-strain deformation conditions at device level, simultaneously deliver high areal capacitance (232 mF cm −2 at 5 mV s −1 and 128 mF cm −2 at 1 mA cm −2 ) and maintain stable energy output. The simple device architecture, novel structural components, steady mechanical properties combined with excellent electrochemical properties make the soft supercapacitors promising for truly wearable applications.
研究领域:
材料科学
·
能源技术
·
软体机器人
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 6
·9058-9068
·
IF 5.164
Yingying Ma,Jinyong Tian,Liang Li,Lingtong Kong,Song Liu,Kunkun Guo,Xuli Chen
Summary With the increasing challenge of energy, resource, and environment, it is highly desired to develop renewable energy and corresponding efficient energy storage technologies basing on reproducible materials. Recently, using biomass and biotechnology to prepare electrode material for energy storage devices is gaining growing attention. Here, we use biomass, celery, as a material source and developed a new way to prepare highly qualified graphitized porous carbon. Besides, instead of direct carbonization, the celery is first freeze-dried to protect the original elements and structure of biomass. Furthermore, to sculpture more nanoscale pores in the produced material, the following carbonization process is also greatly modified by investigating proper carbonization temperature and time. Therefore, the interconnected hierarchical porous structure can be formed based on the protected original pores with size of micrometers and the newly formed pores with size of nanometers. The resulted interconnected hierarchical porous carbon is used to prepare supercapacitor electrode and exhibit excellent energy storage properties. Without any extra activating or doping process, the specific capacitance of the resulted electrode reached 350.0 F g −1 at 1 A g −1 , which is 5.28 times of that of directly carbonized material. And the power density reached 8.0 kW kg −1 with the energy density maintaining 16.3 Wh kg −1 .
研究领域:
材料科学
·
能源技术
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Zheng Bo,Kexin Yi,Huachao Yang,Xinzheng Guo,Zhesong Huang,Zhouwei Zheng,Jianhua Yan,Kefa Cen,Kostya (Ken) Ostrikov
Ever-increasing mass loading of transition metal oxides (TMOs) yields high pseudocapacitance in laboratory electrochemical capacitors . However, their performance based on whole electrode mass is still far from industry standards. Highly-promising solution based on loading TMOs into 3D porous electrodes causes a yet unresolved challenge to find ways to achieve ultimate energy storage by atomically precisely loading less active material. Inspired by single-atom catalysis, we propose a new “ more from less but precise ” concept of homogeneously dispersing a common MnO 2 TMO via atomic sites to maximize atom redox reaction efficiency for industry-relevant pseudocapacitance. The concept is materialized by multifunctional MXene aerogel with super-hydrophilicity and surface functional groups, which provides 3D atomic nucleation sites to homogeneously load in-situ -formed, covalently-bonded MnO 2 nanosheets . The gravimetric capacitance of MnO 2 is largely enhanced, yielding superior pseudocapacitance of >400 F/g at > 5 mg/cm 2 that is typically achieved at 10 times lower loadings. Outstanding electrode areal capacitance is achieved using 2–3 times less MnO 2 mass, demonstrating industry-relevant pseudocapacitance almost twice higher than in state-of-the-art devices. MnO 2 /MXene//MXene asymmetric supercapacitor shows practically-high energy (~50.1 Wh/kg) and power (~10.0 kW/kg) densities, among the best MnO 2 pseudocapacitors . Capacitive-mechanism-controlled redox reactions, rarely achievable in diffusion-controlled porous pseudocapacitive electrodes, are revealed.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Sijie Xie,Zhijie Bi,Yongbo Chen,Xiaoli He,Xiangxin Guo,Xiangdong Gao,Xiaomin Li
Amorphous Mo-doped WO 3 films are successfully synthesized via an electrodeposition method. In comparison with the reported time-consuming and costly techniques involving heating or vacuuming steps, the proposed electrodeposition method achieves the preparation of Mo-doped WO 3 in a simple and economic all-solution route. By optimizing the dopant concentration of Mo, the as-prepared 2 at% Mo-doped WO 3 film exhibits excellent electrochromic and energy-storage properties with large optical modulation of 83.3% at 633 nm and high pseudocapacitance of 117.1 mF cm −2 (334.6 mF g −1 ), greatly superior to those of pure WO 3 films. These great electrochemical properties could be attributed to the amorphous state and the proper structure distortion caused by doped atoms. Furthermore, bifunctional devices on various substrates contained the 2 at% Mo-doped WO 3 films are demonstrated with satisfactory electrochromic and energy-storage properties as well, indicating the practical applications of the Mo-doped WO 3 films in both energy-saving and energy-storage fields.
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 Applied Materials & Interfaces
·
2018
·
IF 8.097
Meng Han,Anjali Jayakumar,Zongheng Li,Qiannan Zhao,Junming Zhang,Xiaoping Jiang,Xiaolong Guo,Ronghua Wang,Chaohe Xu,Shufeng Song,Jong-Min Lee,Ning Hu
Inspired by “water ripples” in nature and the flocculation phenomenon in colloid chemistry, a novel liquid drop/colloid flocculation approach is developed to fabricate an extremely flexible and compressible 3D macroscopic graphene-based architecture (hydrogels or aerogels), via a new coagulation-induced self-assembly mechanism. This facile and universal technique can be achieved in a neutral, acidic, or basic coagulation bath, producing microsized hydrogels with various structures, such as mushroom, circle, disc shapes, etc. The method also allows us to introduce various guest materials in the graphene matrix using transition metal salts as the coagulating bath. A mushroom-shaped NiCo oxide/GS hybrid aerogel (diameter: 3 mm) is prepared as an example, with ultrathin NiCo oxide nanosheets in situ grown onto the surface of graphene. By employing as binder-free electrodes, these hybrid aerogels exhibit a specific capacitance of 858.3 F g–1 at 2 A g–1, as well as a good rate capability and cyclic stability. The asymmetric supercapacitor, assembling with the hybrid aerogels as cathode and graphene hydrogels as anode materials, could deliver an energy density of 21 Wh kg–1 at power density of 4500 W kg–1. The ease of synthesis and the feasibility of obtaining highly flexible aerogels with varied morphologies and compositions make this method a promising one for use in the field of biotechnology, electrochemistry, flexible electronics, and environment applications.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）