Nanomaterials
·
2022
·Vol. 12
·期 22
·4041
·
IF 5.719
Tao Zhang,Yan Liu,Guihuan Chen,Hengjun Liu,Yuanyuan Han,Shuhao Zhai,Leqing Zhang,Yuanyuan Pan,Qinghao Li,Qiang Li
Transition metal fluoride (TMF) conversion cathodes, with high energy density, are recognized as promising candidates for next-generation high-energy Li/Na-ion batteries (LIBs/SIBs). Unfortunately, the poor electronic conductivity and detrimental active material dissolution of TMFs seriously limit the performance of TMF-LIBs/SIBs. A variety of FeF3-based composites are designed to improve their electrochemical characteristics. However, the storage mechanism of the conversion-type cathode for Li+and Na+co-storage is still unclear. Here, the storage mechanism of honeycomb iron (III) fluoride and carbon (FeF3@C) as a general cathode for LIBs/SIBs is analyzed by kinetics. In addition, the FeF3@C cathode shows high electrochemical performance in a full-cell system. The results show that the honeycomb FeF3@C shows excellent long-term cycle stability in LIBs (208.3 mA h g−1at 1.0 C after 100 cycles with a capacity retention of 98.1%). As a cathode of SIBs, the rate performance is unexpectedly stable. The kinetic analysis reveals that the FeF3@C cathode exhibit distinct ion-dependent charge storage mechanisms and exceptional long-durability cyclic performance in the storage of Li+/Na+, benefiting from the synergistic contribution of pseudocapacitive and reversible redox behavior. The work deepens the understanding of the conversion-type cathode in Li+/Na+storage.Keywords:full-cell;kinetic analysis;metal fluorides;storage mechanism
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·Vol. 21
·期 5
·3422-3434
·
IF 1.8
Zhiyuan Ma,Qingqing Yang,Bin Meng,Xinyu Ping,Xiaoyu Pan,Congcong Fang
A series of (Ba 0.2 Sr 0.2 Na 0.2 Ca 0.2 La 0.2 )(Zr x Ti 1- x )O 3 (BSNCLZ x T 1- x ) ( x = 0, 0.05, 0.1, 0.15, and 0.2) high-entropy ceramics were prepared in forms of bulks and thin films by conventional sintering and spin-coating, respectively. All ceramic bulks and thin films are composed of a single perovskite-structured solid solution. The introduction of the Zr element reduces the dielectric loss of bulks and thin films and improves the frequency stability of the dielectric constant. The ceramic bulks have a higher dielectric constant and lower loss than their corresponding thin films. As x rises from 0 to 0.2, the breakdown strength E b of the ceramic bulks increases from 209 to 327 kV/cm, and that of thin films enhances from 890 to 1770 kV/cm. The bulks and thin films of BSNCLZ 0.1 T 0.9 possess the maximum recoverable energy density W rec (0.82 and 3.48 J/cm 3 ) and energy storage efficiency η (95.8% and 86.8%).
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 8
·2118-2125
·
IF 5.934
Xianglong Huang,Wei Wang,Jianhua Deng,Wei Gao,Dingyu Liu,Qianru Ma,Maowen Xu
In this study, a novel hollow carbon matrix was designed and prepared using a facile NaCl crystal template for the effective encapsulation of Se. This superior carbon electrode plays a significant role in facilitating sufficient energy storage and conversion of Se-based cathode materials. A large specific surface area of 416 m2 g−1 was obtained, and the matrix provided numerous hollow spheres for the storage of Se. The thermogravimetric analysis and electrochemical results show that the as-prepared Se-hollow porous carbon composite with an ideal Se content of 42% can make excellent capacity contribution. The hollow porous structure not only effectively accommodates the volumetric expansion during the discharge–charge process but also makes the composite have a good contact with the electrolyte. In addition, the 3D open framework structure can be conducive to fast electron transportation. As a result, the Se-hollow porous carbon composite exhibited outstanding electrochemical performance when evaluated as a cathode material for rechargeable K–Se 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
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2022
·
IF 7.305
Xiangyang Liu,Zeyang Kang,Jiahao Zhao,Shaoxuan Huang,Ying Zhang,Maogang He
Coupling with supercritical power cycle can improve the thermal efficiency of the concentrated solar system. Design the suitable thermal storage medium is critical to the new coupling system. A new ternary eutectic salt with low cost was developed composed of NaCl , Na 2 CO 3 , and Na 2 SO 4 based on the calculation method of phase diagram , meeting the requirements of solar energy storage over 873 K. The eutectic point and composition of the designed salt were predicted to be 900 K and 50 mol% NaCl-35 mol% Na 2 CO 3 -15 mol% Na 2 SO 4 . The designed salt shows high specific heat capacity and phase-change enthalpy, and low cost, which indicates it has good thermal storage capacity. Composite phase change materials with multi-walled carbon nanotubes and graphene nanosheets which can enhance the thermal conductivity and heat capacity of designed salt were prepared. The effects of preparation methods on the thermophysical properties of the composite phase change materials were analyzed.
研究领域:
材料科学
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能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 17
·10282-10292
·
IF 4.22
Hussain Taimoor,Nie Pengfei,Hu Bin,Shang Xiaohong,Yang Jianmao,Liu Jianyun
Alkaline-earth metal-based MOF has many merits such as light weight, environmental friendliness and low cost, but it has rarely been used in energy storage and capacitive deionization (CDI). This paper presents a facile method for the fast synthesis of small-size magnesium formate MOF (Mg-MOF) under mild conditions by linker-free incubation in the presence of Mg(CH 3 COO) 2 ⋅ 4H 2 O and dimethylformamide. The formic acid was in situ formed as ligand to facilitate the formation of Mg-MOF. The effect of incubation time on the morphology of MOF crystals was investigated. The small and well-defined Mg-MOF particles with the size of ~ 18 nm were formed in 1 h incubation, characterized by scanning electron microscopy and X-ray diffraction. Following carbonization, the Mg-MOF-derived mesoporous carbon was obtained. N 2 -sorption isotherm confirmed the mesoporous structure. Cyclic voltammetry test indicated the good electric double-layer feature of the Mg-MOF-derived carbon electrode, and the impedance results showed the excellent conductivity. As a capacitor electrode material, it delivered the specific capacitances of 102 F/g by GCD (0.2 A/g). The Mg-MOF-derived carbon electrode was applied successfully for capacitive deionization (CDI) with a desalination capacity of 8.0 mg/g in a CDI device. A supper fast desalination rate of 1.1 mg/g/min was achieved due to the abundant mesoporous structure. The work provides a cost effective and environmentally friendly way for the synthesis of MOF-based carbon materials free of transition metal, and the prospects for CDI application have been demonstrated.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xue Bai,Tao Fan,Gang Chen,Jie Wang,Cong Ji,Chao Chen,Zixuan Zhang,Wei Cai,Rongli Gao,Chunlin Fu
NaMg 0.12 Nb 0.88 O 3 - x BiYbO 3 (abbreviated as NMN- x BY) ( x = 0, 0.005, 0.01, 0.015, 0.02, 0.04 and 0.08) ceramics were fabricated by using a traditional solid-state reaction method. The crystal structure, morphology, relaxation behavior and energy storage properties of NMN- x BY) ceramics were systematically investigated. X-ray diffraction patterns (XRD) demonstrates that all samples present a single pseudo-cubic phase. It is also found that the grain sizes vary irregular with the BY content, and it can be reduced by the appropriate addition of BY content as indicated by scanning electron morphology. From the measured dielectric properties , it can be seen that all samples are transformed from normal ferroelectric (FEs) to relaxor ferroelectric (RFEs). The maximum relaxor diffuseness coefficient γ (∼1.78) is obtained for 0.98NMN-0.02BY ceramic. As x increases, the polarization-electric ( P - E ) hysteresis loops gradually become slimmer. The largest discharged energy density (∼0.998 J/cm 3 ) and the maximum energy efficiency (∼70%) are obtained at 170 kV/cm for x = 0.04. Meanwhile, the discharge energy densities present relatively excellent temperature stability for x = 0.02 in the temperature range from 20 to 140 °C. This work demonstrates a wide potential application in enhancing the storage properties of lead-free ferroelectric materials by co-doping MgO and bismuth-based perovskites .
研究领域:
材料科学
·
电介质物理
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2024
·
IF 8.1
Hongmei Qin,Ziwei Li,Shiyu Qin,Yanda Jiang,Man Liu,Ling Zhou,Siyu Yu,Shan Wang,Chuanxi Xiong
High-temperature polymer dielectric capacitors are urgently needed in the new-generation electronic and electrical systems. Whereas, current commercial polymer represented by polyimide (PI) suffer from exponentially growing conduction loss at high temperatures and high electric fields, and hence extremely low discharged energy density and sharply declined charge-discharge efficiency. In this work, we developed superior Al 2 O 3 /PI/Al 2 O 3 sandwich films with drastically improved capacitive energy storage performance via atomic layer deposition (ALD) technology. Notably, resultant PI hybrid dielectrics deposited by 130 nm-thickness Al 2 O 3 (Al 2 O 3 /PI/Al 2 O 3 -130nm) exhibits the highest breakdown strength and the lowest leakage current density compared to pristine PI. Consequently, Al 2 O 3 /PI/Al 2 O 3 -130nm delivers a discharged energy density of 4.9 J/cm 3 at 25 °C and 3.3 J/cm 3 at 150 °C, as high as 2.7 times and 3.3 times respectively that of near PI film. Moreover, PI hybrid dielectrics can operate steadily under 200 MV/m and 150 °C during 10,000 cycle measurements. The excellent performance is mainly attributed to the improved barrier height of the electrode/PI interface endowed by deposited large-bandgap Al 2 O 3 .This work provides a scalable approach to enable excellent high-temperature energy storage performance of polymer dielectrics and promising to promote the application of PI for capacitive energy storage under harsh conditions.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yanrui Hao,Hao Guo,Mingyue Wang,Liping Peng,Henglong Ren,Wu Yang
In this article, MOF-derived (NiCo)Se 2 -x-CeO 2 sphere-rod structure composite with mixed ligands (BPDC: biphenyl-4, 4′-dicarboxylic acid, PTA : terephthalic acid) is constructed via a two-step solvothermal technique. The carboxyl functional groups of BPDC act as nucleation modulation to inhibit transverse growth of MOF by enhancing steric hindrance , and two symmetric carboxyl groups and unsaturated metal nodes of adjacent layers generate the coordination, thus forming ordered nanostructures with relatively large aspect ratio. The structure produces larger pores to balance the opposite and different rate of diffusion for metal and nonmetallic ions in hydrothermal selenization. The construction of heterostructure by combining highly reactive (NiCo)Se 2 with low reactive CeO 2 improves diffusion kinetics. As-prepared (NiCo)Se 2 –3:7-CeO 2 derived from MOF-3:7-CeO 2 of largest aspect ratio generates large mesopore to achieve strong penetration of electrolyte ions and exhibits enhanced performance through synergistic interaction between all components on heterointerface. After testing, the (NiCo)Se 2 –3:7-CeO 2 (PTA:BPDC = 3:7) electrode shows superior specific capacitance of 2715 F g −1 (1222 mAh g −1 ) at 1 A g −1 . The assembled (NiCo)Se 2 –3:7-CeO 2 //AC HSC (hybrid supercapacitor) delivers energy density of 45.9 Wh kg −1 at power density of 747 W kg −1 .
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
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Zhenyu Xiao,Licai Fu,Jiajun Zhu,Wulin Yang,Deyi Li,Lingping Zhou
H2O, with its mild etching ability, was frequently used to regulate the morphology and crystal structure of substances, thereby enhancing their properties. Inspired by this, we utilized the crystal H2O in FeF3·3H2O to perform an etching process with an aim to improve the conductivity of FeF3, which could enhance its capacity level and rate capabilities. Herein, this research reported that this in-situ etching was conducted during the dehydration of FeF3·3H2O; meanwhile, the surface of the FeF3 grains was roughened, and traces of iron oxyfluoride were produced on it. The conductivity of the FeF3 grains was significantly enhanced, attributed to the semiconducting property of iron oxyfluoride. Moreover, the rough surface increased the effective contact area between the grains and the electrolyte, thereby increasing the exchange flux of Li+. With the increased quantity of iron oxyfluoride compounds, the charge transfer resistance of the electrode was reduced from 61.87 to 37.2 Ω, and the initial discharge capacity increased from 83.5 to 108.1 mAh g–1 at 2C. This finding provided strategies and methods for the surface modification of compound materials. Especially for halogen metal compounds with high theoretical capacity energy density, their chemical performance can be improved by in-situ defect engineering in the process of dehydration of their hydrates.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2025
·
IF 6.2
Haoming Xu,Wenli Li,Imtiaz Haider,Yuhua Zheng,Mianqi Xue,Jiechao Ge,Bao Wang,Serge Zhuiykov,Yanbin Cui
Structural design and interlayer architecture of electrochromic (EC) materials play significant role in their performance. Herein, tungsten trioxide (WO 3 ) nanoflowers have been synthesized through in situ intercalation with polyaniline (PANI), developing a 3D hierarchical structure with optimized interlayered spacing. The PANI-WO 3 composite showed superior EC stability due to improved ion storage capacity by 3D hierarchical structure with extended surface area for ion interaction. The enlarged layer spacing of PANI-WO 3 composites allows for accommodating more exchangeable Li + . The PANI-WO 3 film maintains remarkable cycling stability, retaining 80% of its initial capacity after 30000 cycles. The EC device based on PANI-WO 3 demonstrates high optical modulation (57% at 633 nm), rapid switching speeds (coloration to 23% in 15 s and bleaching to 80% in 10 s) and high coloration efficiency (168 cm 2 C −1 ). Meanwhile, the PANI-WO 3 EC supercapacitor achieves a high specific capacitance (121 mF cm −2 at 0.2 mA cm −2 ) and prolonged cyclic life (specific capacity remains at 58% and coulombic efficiency at 65% after 1500 cycles). The PANI-WO 3 serves as an effective candidate for the fabrication of high-performance EC devices (ECDs) with potential applications in energy-saving smart windows, outdoor static displays, and other energy-efficient technologies.
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
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yuting Wan,Penghao Hu,Binzhou Sun,Shuyi Shen,Hang Luo,Shujun Zhang,Dou Zhang,Ce-Wen Nan,Yang Shen
Dielectric polymers must exhibit low conductivity and thermal stability to realize high-performance capacitive energy storage under high-temperature conditions. However, conventional heat-resistant polymers suffer from deteriorated insulation at elevated temperatures, limiting their practical applications. Here, it is proposed and demonstrated that a self-driven thermal crosslinking approach, without crosslinker, is highly efficient in breaking the adverse correlation between the insulation and thermal stability of dielectric polymers at high temperatures. By decarboxylation-driven crosslinking within polyetherimide (PEI) molecular chains, a robust network is formed, effectively suppressing charge carrier migration. The synergistic combination of decarboxylation-induced structural densification and residual carboxyl-enabled deep charge trapping synergistically reduces the electrical conductivity of the modified PEI by 3 orders of magnitude relative to conventional polyimide (Kapton PI) at 250 °C. Consequently, a significantly enhanced discharge energy density of 3.7 J cm −3 with a charge-discharge efficiency of 91% is achieved at 250 °C, outperforming existing pure polymer dielectrics. Furthermore, the scalability of this approach is demonstrated by producing a 100-meter-long modified film through an industrial-scale roll-to-roll solution-casting process, highlighting its compatibility with mass production. This strategy also proves to be universal to other dielectric polymers to achieve high insulation and heat resistance at elevated temperatures.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Nengneng Luo,Xiafeng He,Chao Xu,Zhengu Chen,Kun Zhao,Zhenyong Cen,Xiyong Chen,Dongliang Shan,Yunya Liu,Zhaobo Liu,Han Xie,Ye Zhu,Houbing Huang,Jing-Feng Li,Shujun Zhang
Dielectric capacitors possessing high power density and ultrashort discharge time are valuable for high-power energy storage applications. However, achieving high energy storage density remains challenging due to the limited breakdown strength of dielectric ceramics. In this study, inspired by the layered architecture of natural nacre and with the guidance of phase-field simulations, a strategy of constructing a nacre-like layered structure is proposed to improve the breakdown strength and energy storage density of the ceramics. This unique structure is formed by controlling the morphology and ordering of high-voltage-resistant fillers in a ceramic matrix. The (Pb 0.98 La 0.02 )(Zr 0.7 Sn 0.3 ) 0.995 O 3 -Al 2 O 3 antiferroelectric composite ceramics, containing 5vol% parallel-aligned Al 2 O 3 plates, demonstrate a remarkable enhancement in breakdown strength from 390 to 570 kV cm −1 . Of particular importance is that an ultrahigh recoverable energy storage density of up to 13.2 J cm −3 is achieved, representing a 50% enhancement compared to the pure ceramic (8.7 J cm −3 ). The parallel-aligned Al 2 O 3 plates are strongly bound together with the ceramic matrix, effectively blocking charge migration and controlling the breakdown path, thus greatly enhancing the voltage endurance of the composite ceramics. This work provides an innovative approach to designing high-performance composite ceramics for next-generation energy storage applications.
研究领域:
材料科学
·
能源存储
✓ 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）