Materials
·
2022
·Vol. 15
·期 17
·5881
·
IF 3.748
Yuleng Jiang,Xiang Niu,Wei Liang,Xiaodong Jian,Hongwei Shi,Feng Li,Yang Zhang,Ting Wang,Weiping Gong,Xiaobo Zhao,Yingbang Yao,Tao Tao,Bo Liang,Shengguo Lu
Owing to the high power density, excellent operational stability and fast charge/discharge rate, and environmental friendliness, the lead-free Na0.5Bi0.5TiO3(NBT)-based relaxor ferroelectrics exhibit great potential in pulsed power capacitors. Herein, novel lead-free (1−x)(0.7Na0.5Bi0.5TiO3-0.3Sr0.7Bi0.2TiO3)-xBi(Mg0.5Zr0.5)O3(NBT-SBT-xBMZ) relaxor ferroelectric ceramics were successfully fabricated using a solid-state reaction method and designed via compositional tailoring. The microstructure, dielectric properties, ferroelectric properties, and energy storage performance were investigated. The results indicate that appropriate Bi(Mg0.5Zr0.5)O3content can effectively enhance the relaxor ferroelectric characteristics and improve the dielectric breakdown strength by forming fine grain sizes and diminishing oxygen vacancy concentrations. Therefore, the optimalWrecof 6.75 J/cm3and aηof 79.44% were simultaneously obtained in NBT-SBT-0.15BMZ at 20 °C and 385 kV/cm. Meanwhile, thermal stability (20–180 °C) and frequency stability (1–200 Hz) associated with the ultrafast discharge time of ~49.1 ns were also procured in the same composition, providing a promising material system for applications in power pulse devices.Keywords:Na0.5Bi0.5TiO3;lead-free;relaxor ferroelectrics;compositional tailoring;energy storage
研究领域:
材料科学
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能源技术
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Hong Jia,Xinyu Zhu,Tingting Song,Jinping Pan,Feng Peng,Longhua Li,Yu Liu
Exploring novel structures consisting of multiple highly active components is a crucial challenge for supercapacitor applications. Using an in-situ self-templated method, we demonstrate the controlled fabrication of a fibrous hierarchical nanocomposite made of carbon microfibers covered with a layer of metal–organic framework (MOF) derived from nickel-cobalt layered double-hydroxide (NiCo-LDH) nanosheets decorated with (NiCo)Se 2 nanoparticles . The (NiCo)Se 2 nanoparticles attached tightly onto the surface of the two-dimensional NiCo-LDH, both of which were generated by the decomposition of the NiCo-based MOF, and exhibited multiple active sites that contributed to improved electrical conductivity, high capacity, and structural stability. Density functional theory calculations revealed that the density of states near the Fermi level was significantly enhanced, favoured OH – adsorption, and promoted the kinetics of the electrochemical reaction. Benefiting from the intrinsic synergetic contributions from the hierarchical nanoscale structure, the electrode made from the nanocomposite delivered an impressive capacity of 1394.2 F g −1 (702.7 C g −1 ) at 1 A g −1 . Furthermore, a hybrid supercapacitor based on the developed nanocomposite demonstrated an energy density of 50.6 W h kg −1 and a power density of 800 W kg −1 with high cyclic stability. Our results suggest that the hierarchical nanocomposite can be a powerful electrode for advanced next-generation supercapacitors.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Wei Shao,Zitong Wu,Yi Liu,Guoan Tai
As an exceptional metallic Dirac material, borophene shows promise for superior mechanical and electronic properties, making it increasingly significant in electronics. Both theoretical predictions and experimental evidence underscore its potential in energy storage applications. However, due to existing limitations in synthesis techniques, the application of stacked borophene as flexible electrodes remains unexplored. This study aims to overcome these challenges by introducing an innovative in situ co-eutectic salt method for synthesizing AB-stacked hydrogenated borophene sheets. These sheets are then employed to fabricate large-scale electrodes and construct flexible electric double-layer supercapacitors based on borophene. The robust mechanical stability of stacked borophene facilitates significant improvements in interfacial characteristics and energy storage performance through rolling processes. This enhancement results in increased specific capacity, improved rate performance, and enhanced cyclic stability of thin-film electrodes. Specifically, the optimized borophene-based supercapacitor achieves a high specific areal capacitance of up to 417.3 mF/cm 2 in an organic electrolyte at a current density of 1 mA/cm 2 , which represents a twofold improvement compared to non-stacked borophene structures. Remarkably, it retains over 88.3 % of this specific areal capacitance even at a high current density of 15 mA/cm 2 , demonstrating impressive rate capability. Furthermore, after 5000 charge–discharge cycles, the capacitance retention exceeds 89.3 %. This research is expected to catalyse the application and advancement of borophene in future flexible and portable electronic devices, highlighting its potential transformative impact in energy storage technologies.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 40
·13752-13762
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IF 6.4
Yuanze Meng,Jialun Li,Xijia Yang,Yang Gao,Xuesong Li,Liying Wang,Wei Lü
Poly (3,4-ethylenedioxythiophene): poly (4-styrenesulfonic acid) (PEDOT:PSS) is a kind of widely used polymer with excellent electrical conductivity. In this study, PEDOT:PSS was modified to achieve self-healing ability while maintaining excellent energy storage properties. The modified PEDOT:PSS hybrid film demonstrated instantaneous self-healing ability due to physical cross-linking after being subjected to different external cuts (the average self-healing time was 1.44 s). When pressed at different rates, the film had a self-healing time of less than 0.12 s, and a retention rate of 74% after pressing 1750 times consecutively at a rate of 8.6 cm s−1. The mechanism of self-healing was investigated using theoretical calculations. Tungsten trioxide (WO3) was further introduced into the PEDOT:PSS hybrid film to fabricate electrochromic energy storage devices (EESDs), achieving a specific capacitance of 105.35 mF cm−2 and a capacitance retention of 98.2% after 1000 cycles. In the organic/inorganic hybrid system, the modified PEDOT:PSS film acted as both a protective coating for WO3 and exhibited a synergistic color change with WO3, ultimately improving the overall performance of the device. The present self-healing strategy can help design restorers for EESDs and can be extended to other new rechargeable electrochromic battery systems with good application prospects.
研究领域:
材料科学
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能源技术
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电子工程
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产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Xuewen Peng,Bin Yang,Danjiang Deng,Zhiwei Cai,Xi Kong,Letao Yang,Jinming Guo
The application of lead-free dielectric ceramics for energy storage has received extensive attention because of their remarkable potential as pulse capacitors in power electronic devices. The current study developed a strategy for improving the energy storage performance of (K 0.5 Na 0.5 )NbO 3 (KNN)-based ceramics by incorporating Bi(Zn 2/3 Nb 1/3 )O 3 to reduce grain size, increase dielectric breakdown strength, and enhance ferroelectric relaxation degree. The resulting 0.87KNN–0.13BZN ceramics exhibited a high energy density (7.4 J/cm 3 ) and moderate energy efficiency (74%) at an ultrahigh electric field (750 kV/cm) as well as excellent optical properties. Therefore, the 0.87KNN–0.13BZN ceramic is a promising candidate for pulse capacitors, providing a feasible approach for the development of new lead-free energy storage materials.
研究领域:
材料科学
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电子工程
✓ 已验证
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2025
·Vol. 122
·期 3
·e2416817122
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IF 9.1
Zhengqiang Hu,Fengling Zhang,Feng Wu,Li Li,Renjie Chen
Lithium-ion batteries (LIBs) have become advanced energy storage technologies; however, specific capacity remains limited by the active materials in cathodes. Here, we report Li–LiNO3 batteries (LNBs) where LiNO3 in electrolyte serves as both active materials and ion conductor at room temperature. LNBs operate on a highly reversible redox between NO3− and NO2−, which results in an impressive areal capacity of 19 mAh cm−2 at a plateau voltage of 1.75 V. Furthermore, the pouch cell exhibits stable cycling at a capacity of 100 mAh. This research underscores the potential of LNBs for high-capacity energy storage.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Can Qu,Yiting Long,Xuemei Zhang,Jingsong Liu,Linyu Pu,Xu Huang
In this paper, UiO-66 nanoparticles were synthesized through the hydrothermal synthesis technique. Subsequently, a series of metal-organic framework/polyvinylidene fluoride (MOF/PVDF) composite films were produced via a solution-casting approach. The dielectric properties of UiO-66/PVDF (U/P) composite are improved with the addition of UiO-66. The dielectric constant ( ɛ r ) of 20 wt% U/P composite film at 10 2 Hz is 11.20, 1.44 times that of pure PVDF film ( ɛ r = 7.78). However, the breakdown strength ( E b ) was only 95 kV mm −1 . To solve the problem of sharp decline in E b , TiO 2 with a wide band gap was introduced to form an insulating layer on the surface of UiO-66. This reduces the difference in electrical properties between the filler and PVDF, hinders the formation of the conductive path within the composite, reduces leakage current, and increases E b . Compared with the U/P composite, the ɛ r and E b of TiO 2 @UiO-66/PVDF (T@U/P) composite film are increased, and the dielectric loss (tan δ ) and leakage current density ( J ) are decreased. The energy storage density ( U e ) of 10 wt% T@U/P composite film is 4.51 J cm −3 and the charge and discharge efficiency ( η ) is 84.61% at 150 kV mm −1 . These results indicate that the dielectric properties of UiO-66 can be significantly enhanced by using titanium dioxide as an insulating layer. Highlights By introducing UiO-66, the ɛ r of PVDF material is improved. Modifying UiO-66 with TiO 2 can improve its breakdown strength significantly. The U e of the T@U/P-10 composite modified with UiO-66 is 4.51 J cm −3 .
研究领域:
材料科学
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电气工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 44
·期 7
·5441-5454
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IF 3.741
Yingqi Heng,Nianrong Feng,Yexin Liang,Dongying Hu
Summary Shaped-stabilized reversible thermochromic phase change materials of (TBC-LB, TBB-LB) were assembled by impregnation the TBC (crystal violet lactone/bisphenol A/tetradecanol) or TBB (3,3′-Bis (1-n-octyl-2-methylindol-3-yl) phthalide/bisphenol A/tetradecanol) into lignin-retained bamboo (LB) for energy storage. Analysis of the chemical structure of lignin-retained wood showed that the removal of part of lignin from the bamboo contributes to the penetration of the compound, and the partial retention of lignin is advantageous for maintaining high mechanical properties. The SEM micrographs of TBC-LB and TBB-LB indicate that TBC and TBB are well immersed into the porous LB. The TBC-LB showed an endothermic peak at 40.8°C with Δ H m of 113.3 J g −1 and two exothermic peaks at 28.8°C and 21.9°C with Δ H L+S of 110.2 J g −1 , and the value is basically equal to the pure TBC compound, indicating that TBC has been fully immersed in LB to form a composite phase change material. For phase change latent heat and melting-cooling temperature, TBB-LB and TBC-LB showed the same trend. About 100 heating-cooling cycles were performed to evaluate the reliability of TBC-LB and TBB-LB, showing excellent cycle stability. It is foreseen that the prepared shape-stable TBC-LB and TBB-LB have great potential for applying insulation systems in reversible thermochromic phase change energy storage.
研究领域:
材料科学
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能源存储
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jian Zhang,Tianlin Li,Qingyan Yuan,Yunjia Wu,Yibo Dou,Jingbin Han
Transition-metal compounds (oxides, sulfides, hydroxides, etc.) as lithium-ion battery (LIB) anodes usually show extraordinary capacity larger than the theoretical value due to the transformation of LiOH into Li2O/LiH. However, there has rarely been a report relaying the transformation of LiOH into Li2O/LiH as the main reaction for LIBs, due to the strong alkalinity of LiOH leading to battery deterioration. In this work, layered silicate MgAl saponite (MA-SAP) is applied as a −OH donor to generate LiOH as the anode material of LIBs for the first time. The MA-SAP maintains a layered structure during the (dis)charging process and has zero-strain characteristic on the (001) crystal plane. In the discharging process, Mg, Al, and Si in the saponite sheets become electron-rich, while the active hydroxyl groups escape from the sheets and combine with lithium ions to form LiOH in the “caves” on sheets, and the LiOH continues to decompose into Li2O and LiH. Consequently, the MA-SAP delivers a maximum capacity of 536 mA h·g–1 at 200 mA·g–1 with a good high-current discharging ability of 155 mA h·g–1 after 1000 cycles under 1 A·g–1. Considering its extremely low cost and completely nontoxic characteristics, MA-SAP has great application prospects in energy storage. In addition, this work has an enlightening effect on the development of new anodes based on extraordinary mechanisms.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 42
·2103214
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IF 18.808
Xianbo Yu,Guangyu Zhao,Chao Liu,Canlong Wu,Huihuang Huang,Junjie He,Naiqing Zhang
Owing to the low-cost, dendrite-free formation, and high volumetric capacity, rechargeable Li + /Mg 2+ hybrid-ion batteries (LMIBs) have attracted great attention and are regarded as promising energy storage devices. However, due to the strong Coulombic interaction of Mg 2+ with host materials, the traditional “Daniell Type” LMIBs with only Li + intercalation usually cannot ensure a satisfactory energy density. Herein, graphene monolayers are arranged intercalating into MoS 2 interlamination to construct van der Waals heterostructures (MoS 2 /G VH). This operation transforms the construction of ion channels from pristine interlamination of two MoS 2 monolayers to the interlamination of MoS 2 monolayer with graphene monolayer, thereby greatly reducing ion diffusion energy barriers. Compared with pristine MoS 2 , the MoS 2 /G VH can obviously reduce the migration energy barriers of Li + (from 0.67 to 0.09 eV) and Mg 2+ (from 1.01 to 0.21 eV). Moreover, it is also demonstrated that MoS 2 /G VHs realize Li + /Mg 2+ co-intercalation even at a rate current of 1000 mA g −1 . As expected, the MoS 2 /G VH exhibits superior electrochemical performance with a reversible capacity of 145.8 mAh g −1 at 1000 mA g −1 after 2200 cycles, suggesting the feasibility of potential applications for high-performance energy storage devices.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Hongmin Liu,Pankun Wu,Ronghao Wang,Huanjiang Meng,Yaqi Zhang,Weizhai Bao,Jingfa Li
The combination of photo-driven self-powered supplies and energy storage systems is considered as a promising candidate to solve the global energy dilemma. The photo-absorber and the energy storage material are integrated into the photocathode to effectively achieve a high-energy and high-efficiency energy system. In this work, we report the customized Janus-jointed photocathode design (integrating with highly efficient halide perovskite and tellurium composite electrode) and introduce it into the aqueous zinc–tellurium battery. The well-matched energy level of the Janus-jointed photocathode ensures the conversion of the photoenergy into electrical energy by transferring the photoexcited charge between each. As expected, in the photo-assisted recharging model, the decreased 0.1 V charge voltage and the extra 362 mA h g–1 at 100 mA g–1 demonstrated the significant merits of saving energy for such a photo-rechargeable Zn–Te (PRZT) battery. When the current density is 1000 mA g–1, the specific capacity of the prepared photocathode is 83% higher than that under dark conditions. More importantly, the photogenerated charge by the perovskite under light illumination could also directly photocharge the battery with no external current, indicating the self-powering traits. The rational design in this work is believed to provide a sustainable mode for efficient charging of the aqueous PRZT battery.
研究领域:
材料科学
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能源工程
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Qingguo Chi,Tao Ma,Yue Zhang,Qingguo Chen,Changhai Zhang,Yang Cui,Tiandong Zhang,Jiaqi Lin,Xuan Wang,Qingquan Lei
The high-performance energy-storage dielectric capacitors are increasingly necessary for the development of miniaturization, integration, and multifunctionality of electronic devices. Here, we describe a new strategy of a sandwich-structured polymer-based dielectric composite with inorganic fillers of semiconductor@perovskite hybrid fibers, and this novel dielectric composite possesses an excellent energy-storage performance at low electric field. It is of crucial importance to achieve hybrid nanofibers of 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 nanofibers (BZT–BCT NFs) deposited by CoFe2O4 nanoparticles (CFO; hereafter, CFO@BZT–BCT NFs in short). Herein, the BZT–BCT NF ceramic has the typical perovskite structure and large dielectric constant, which is used as the ceramic-support for CFO. Meanwhile, the semiconductor of CFO works as the electron donor to offer a great interfacial polarization for the improvement of overall dielectric constant of the composite. Remarkably, the trilayer structure is composed of outer poly(vinylidene fluoride) (PVDF) layer to improve the breakdown strength and middle CFO@BZT–BCT NFs–PVDF nanocomposite to enhance the dielectric properties. The BZT–BCT NFs were prepared by electrospinning, and then the CFO@BZT–BCT NFs were gained by hydrothermal method. Furthermore, the BZT–BCT NFs and the CFO@BZT–BCT NFs were modified by polydopamine (PDA). Finally, the sandwich-structured composites were gotten by a typical process of solution-casting and hot-pressing. The influences of fillers’ volume fraction and type on the performances of composites have been systematically investigated. The PVDF/CFO@BZT–BCT NFs–PVDF/PVDF composite (P/CFO@BZT–BCT NFs–P/P) exhibits an outstanding energy density performance under a low electric field. The trilayer structure composite with an optimized content of nanofibers possesses an excellent dielectric performance (dielectric constant ∼20.1 at 100 Hz) and great energy-storage performance (electric displacement ∼10.7 μC/cm2, discharged energy density ∼11.3 J/cm3, and efficiency ∼55.5% at a low electric field of 350 kV/mm). This work paves the way for potential applications in integrated electronic devices.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
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