Frontiers of Materials Science
·
2023
·Vol. 17
·期 3
·1-13
·
IF 2.7
Bo Ruitian,Wang Chunfeng,Wang Yongliang,He Peigang,Han Zhidong
The layer-structured composites were built by the dielectric and insulating layers composed of polyvinylidene fluoride (PVDF) and low-density polyethylene (LDPE) composites containing barium titanate (BT) to modulate the dielectric and energy storage properties of the composites. The simulations on the interface models for molecular dynamics and the geometric models for finite element analysis were performed together with the experimental characterization of the morphology, dielectric, and energy storage properties of the composites. The results revealed that polyethylene as an insulating layer played a successful role in modulating dielectric permittivity and breakdown strength while BT particles exerted positive effects in improving the miscibility between the composed layers and redistributing the electric field. The strong interface binding energy and the similar dielectric permittivity between the PVDF layer and the BT20/LDPE layer made for the layer-structured composites with a characteristic breakdown strength ( E b ) of 188.9 kV·mm −1 , a discharge energy density ( U d ) of 1.42 J·cm −3 , and a dielectric loss factor (tan δ ) of 0.017, which were increased by 94%, 141%, and decreased by 54% in comparison with those of the BT20/PVDF composite, respectively.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Device
·
2023
·
IF 0
Long Qin,Chang Xu,Qingling Che,Fuzhi Yan,Jie Xue,Xiaofei Wei,Siwei Xiang,Jie Wu,Changyuan Tao,Xiaohong Liu,Chong-Yew Lee,Wei Zhang,Xing Fan
The performance of small wearable or robotic devices is limited by the energy and power density of batteries. We present a rechargeable aqueous gel-type AgO-Zn battery, with a power density of 17.9 W/cm 3 and an energy density of 624 mWh/cm 3 at 0.2C and 358 mWh/cm 3 at 50C. We designed a multilayered fractal ion-channel structure for the long, fibrous AgO electrode using a twisting method. A prototype headband of 2 cm × 25 cm woven with the fibrous batteries was tested. With a power output of >4 W, the headband battery can extend the operation time of commercial augmented reality glasses from 2 h to over 12 h. Prototype batteries of different shapes using this design were made, including a carrying bag that works as a power bank for a phone and batteries for a small robotic spider and a robotic bird.
研究领域:
材料科学
·
能源技术
·
电子工程
✓ 已验证
DOI
IONICS
·
2019
·Vol. 26
·期 1
·245-254
·
IF 2.289
Qiao Jia,Zhou Haitao,Liu Zhongsheng,Wen Hejing,Du Juan,Wei Guokang,He Changlei,Yang Jianhong
Although Al-ion battery is attracting researchers’ attention worldwide, its volumetric energy density was not so promising due to low density of graphite-based positive electrodes in the current published literatures. Thus, defect-free yet densely packed graphene electrodes with high electronic conductivity and fast ionic diffusion are crucial to the realization of compacted Al-ion batteries with high volumetric energy density. In the present work, a self-supported and defect-free graphene-positive electrode (R H G-P-2850) was successfully produced by a hydriodic acid reduction of the graphene oxide (GO) method, followed by an ultrahigh temperature (2850 °C) annealing treatment. The density of the R H G-P-2850 (0.32 g cm −3 ) is currently the highest positive electrode material in the preparation of graphene-positive electrodes from GO. R H G-P-2850 positive electrode enables to deliver considerably high specific capacity 27.1 mAh cm −3 (85 mAh g −1 ) at the current density 2 A g −1 . More importantly, a remarkably stable performance was achieved with 20% fading over 8000 cycles. The results enlighten and promote the design and preparation of densely packed graphene-positive electrode to develop high-performance Al/graphene battery.
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
ChemSusChem
·
2018
·Vol. 11
·期 11
·1880-1886
·
IF 7.411
Cheng Peng,Chengzhi Guan,Jun Lin,Shiyu Zhang,Hongliang Bao,Yu Wang,Guoping Xiao,George Zheng Chen,Jian-Qiang Wang
Graphical Fe-clad results : A low-cost, high-temperature rechargeable iron–oxygen battery containing a bi-phase electrolyte of molten carbonate and solid oxide is described. This new design merges the merits of a solid–oxide fuel cell and molten metal–air battery, offering significantly improved battery reaction kinetics and power capability without compromising the energy capacity. The energy and power density of conventional batteries are far lower than their theoretical expectations, primarily because of slow reaction kinetics that are often observed under ambient conditions. Here we describe a low-cost and high-temperature rechargeable iron–oxygen battery containing a bi-phase electrolyte of molten carbonate and solid oxide. This new design merges the merits of a solid–oxide fuel cell and molten metal–air battery, offering significantly improved battery reaction kinetics and power capability without compromising the energy capacity. The as-fabricated battery prototype can be charged at high current density, and exhibits excellent stability and security in the highly charged state. It typically exhibits specific energy, specific power, energy density, and power density of 129.1 Wh kg −1 , 2.8 kW kg −1 , 388.1 Wh L −1 , and 21.0 kW L −1 , respectively, based on the mass and volume of the molten salt.
研究领域:
能源材料
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Xinglin Jiang,Xinzheng Wu,Yanting Xie,Zixing Wang,Junfeng Huang,Yuanxiao Qu,Dali Mu,Xiong Zhang,Weiqing Yang,Haitao Zhang
Ionic liquid (IL) electrolytes with a high potential window are promising candidates to high-energy-density supercapacitors; however, they commonly suffer from serious kinetic barriers that lead to poor power density. In this work, we propose an additive engineering method to promote rapid dynamics of IL-based supercapacitors. Additive engineering is based on adding cetyltrimethylammonium bromide-grafted Ti3C2 MXene (Ti3C2-CTAB) into 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4), a typical IL electrolyte for supercapacitors. Remarkably, IL electrolytes show a considerable increase by 38% in ionic conductivity and great reduction in solid–liquid surface energy from 18.03 to 12.37 mN m–1. We prove that electrostatic force and hydrogen bonds generated from the interaction between Ti3C2-CTAB and EMIMBF4 facilitate considerable dissociation of electrolyte ion pairs and ion-transfer capability. Consequently, additive engineering-designed IL-based supercapacitors deliver simultaneously a high energy density of 28.3 Wh kg–1 and power density of 18.3 kW kg–1. The increased high-power characteristics are supported by a faster ion diffusion coefficient (1.50 × 10–12 vs 4.04 × 10–13 cm2 s–1) and shorter relaxation time (3.83 vs 6.81 s). In addition, additive engineering guarantees a stable cycling life of 83.6% capacitance retention after 9000 cycles at the depth potential window from 0 to 3.0 V.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2021
·
IF 6.583
Weikang Zheng,Zongyang Li,Guang Han,Qiannan Zhao,Guanjie Lu,Xiaolin Hu,Jing Sun,Ronghua Wang,Chaohe Xu
Lithium-ion capacitors (LICs) have become one of the most popular energy storage devices because of the combination of high energy densities and power densities. However, the kinetic imbalance of anode and cathode restricts the specific capacities and voltage windows of LICs. Herein, an in-situ nitrogen-doped activated porous carbon (ANMPC) material with high specific surface area (1894.9 m 2 /g) is proposed to act as both cathode and anode for the preparation of the 4.5 V “all carbon” LICs. The hierarchically porous ANMPC obtained by KOH activation and carbonization of polypyrrole (PPy) has plenty of mesopores created by surfactant (added during the PPy process) as well as micropores generated by KOH activation, thus can provide abundant active sites for ion intercalation and large area for electrostatic adsorption simultaneously, satisfying the critical requirements of high-performance anode and cathode, respectively. After coupling the pre-lithiated ANMPC anode and fresh ANMPC cathode, the complete LIC device delivers large energy density of 167.5 Wh/kg at a power density of 269.0 W/kg, and still remains 88.9 Wh/kg at an ultrahigh power density of 13,198.5 W/kg, exhibiting enormous potential for applications in high performance lithium-ion capacitors.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ying Lu,Peng Li,Juan Du,Peng Fu,Jigong Hao,Huarong Zeng,Wei Li
Dielectric capacitors show great potential in superior energy storage devices. However, the energy density of these capacitors is still inadequate to meet the requirement of energy storage applications. In this study, the Bi 0.5 Na 0.47 Li 0.03 TiO 3 - x NaNbO 3 (BNLT- x NN) ceramics were prepared via conventional solid-phase reaction. Results showed that NN can efficaciously enhance the breakdown strength ( E b ) and the relaxation behavior of the BNLT ceramic because of the broken ferroelectric long-range order. When x = 0.3, the maximum E b reached 350 kV/cm, at which the 0.7BNLT-0.3NN ceramic exhibited the high recoverable energy storage density ( W rec ) of 4.83 J/cm 3 and great efficiency ( η ) of 78.9%. The ceramic demonstrated good temperature stability at 20 °C-160 °C and excellent fatigue resistance . Additionally, the 0.7BNLT-0.3NN ceramic presented high power density ( P D ; ∼77.58 MW/cm 3 ), large current density ( C D ; ∼861.99 A/cm 2 ), and quite short discharge time ( t 0.9 ; ∼0.090 μs). These results indicated that the 0.7BNLT-0.3NN material has excellent energy storage properties and various application prospects.
研究领域:
材料科学
·
电介质物理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Tao Yang,Yukun Sun,Xianyang Meng,Jiangtao Wu,J. Ilja Siepmann
This work reports new experimental data for the density and viscosity of n -decane + CO 2 binary mixtures. A simultaneous density and viscosity measurement apparatus was redesigned using a vibrating–wire viscometer coupled with a vibrating–tube densimeter. The measurements for the pure component ( n -decane) and three different binary mixtures ( n -decane + CO 2 ), with mole fractions of n -decane of (0.4026, 0.2225, 0.1262), were carried out at temperatures ranging from (303.15 to 373.15) K and pressures up to 80 MPa. The expanded relative uncertainties ( k = 2, level of confidence = 0.95) were estimated to be 0.2% for density and 3.0% for viscosity over the entire measurement range, respectively. Densities were correlated as a function of temperature and pressure through a modified Tait–type equation with an average absolute percentage deviation less than 0.05%. To model the viscosity of the binary mixtures as a function of temperature, density, and composition, the extended hard–sphere method combined with simple quadratic mixing rules were used to describe our experimental data. Good agreement is found between experiments and correlations, which attests to the predictive capabilities of semi–empirical equations. In addition, Monte Carlo simulations in the isobaric-isothermal ensemble with the Transferable Potential for Phase Equilibria–United Atom (TraPPE–UA) force field were carried out to characterize the microscopic structure of the studied systems.
研究领域:
化学工程
·
流体力学
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2022
·Vol. 34
·期 14
·2109870
·
IF 32.086
Situo Cheng,Wenzheng Gao,Zhen Cao,Yifan Yang,Erqing Xie,Jiecai Fu
Conductive 2D conjugated metal−organic frameworks (c-MOFs) are attractive electrode materials due to their high intrinsic electrical conductivities, large specific surface area, and abundant unsaturated bonds/functional groups. However, the 2D c-MOFs reported so far have limited charge storage capacity during electrochemical charging and discharging, and the energy density is still unsatisfactory. In this work, a strategy of selective center charge density to expand the traditional electrode materials to the electrode−electrolyte coupled system with the prototypical of 2D Co-catecholate (Co-CAT) is proposed. Electrochemical mechanism studies and density functional theory calculations reveal that dual redox sites are achieved with the quinone groups (CAT) and metal-ion linkages (Co−O) serving as the active sites of pseudocapacitive cation (Na + ) and redox electrolyte species (SO 3 2− ). The resultant electrode delivers an exceptionally high capacity of 1160 F g −1 at 1 A g −1 and a special self-discharge rate (86.8% after 48 h). Moreover, the packaged asymmetric device exhibits a state-of-the-art energy density of 158 W h kg −1 at the power density of 2000 W kg −1 and an excellent self-discharge rate of 80.6% after 48 h. This success will provide a new perspective for the performance enhancement for the 2D-MOF-based energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2024
·
IF 2.8
Tao Jia,Weixue Jiang,Jia Yu
The compressed liquid densities of n -pentane(1) + n -dodecane(2) binary mixtures were measured using a high pressure vibrating-tube densimeter at temperatures from 283 K to 363 K, pressures up to 100 MPa, and five different compositions ( x 1 = 0.3778, 0.6230, 0.7968, 0.9051, and 1). The densities of binary mixtures were correlated using the modified Tait equation, and the absolute average deviations of the experimental and calculated values were 0.010 %, 0.019 %, 0.016 %, 0.025 %, and 0.017 %, respectively. In addition, the isothermal compressibility and the isobaric thermal expansivity were calculated from the obtained densities.
研究领域:
物理化学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 8
·4115-4124
·
IF 2.047
Li Jiaojiao,Xiao Zhen,Zhou Xiaozheng,Zhang Wenkui,Zhang Jun,Gan Yongping,Huang Hui,He Xinping,Wang Guoguang,Xia Yang
Lithium-sulfur (Li-S) batteries are a promising electrochemical energy storage device due to their low cost, high energy density, and excellent sustainability, making them superior to many commercial lithium-ion batteries. Despite the great road to market, Li-S batteries still suffer from low practical energy density, which is intimately related to fundamental scientific and technological issues of sulfur cathodes. As a non-negligible parameter in sulfur cathodes, the compaction density plays a crucial role in the energy density of Li-S batteries. Herein, the effect of compaction density of sulfur/carbon cathodes on the electrochemical performance of Li-S batteries is investigated. It is demonstrated that sulfur/carbon cathodes with an optimized compaction density of 1.2 g cm −3 not only can guarantee the good contact of active materials, but can also ensure the rational dosage of electrolyte, thereby increasing the sulfur utilization as well as reducing the dissolution of polysulfide into the electrolyte. As a result, the pouch cells paired with the sulfur/carbon cathode and Li metal anode deliver superior specific capacity and remarkable cycling performance, which is attributable to the better contact between particles and the faster redox kinetics. This work reveals the contribution of the compaction density of the sulfur cathode to the electrochemical performance of the Li-S battery, providing an instructive paradigm for the rational design of an advanced sulfur cathode for large-scale commercialized Li-S pouch cells.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Lvyin Hong,Qianting Zhou,Yongsheng Chen,Yafeng Li,Mingdeng Wei
Herein, a one-step route has been developed for synthesizing terbium-phosphine (Tb-(Ph) 3 P) compound, which exhibited an excellent rate capability and an outstanding long cycling stability. The highest specific capacitance of 1866 F g −1 has been obtained at 2 A/g in 6 M KOH, and the capacitance retention of 81.02% has also been achieved at 10 A/g after 30,000 cycles, resulted in a maximum energy density of 93.3 W h kg −1 and a maximum power density of 6.04 kW kg −1 . Such an excellent performance might be attributed to the insolvability and intrinsic characteristics of the Tb-based phosphine complexes, which provided abundant active sites for the charge storage and conductive networks for electron transport. Moreover, a flexible quasi-solid-state asymmetric supercapacitor composed of Tb-(Ph) 3 P and active carbon has been fabricated, and a specific capacitance of 275 mF cm −2 at a current density of 2 mA cm −2 , and a capacitance retention of 100% after 10,000 cycles at 10 mA cm −2 have been respectively achieved, exhibiting an excellent electrochemical property. Thus, the present work might provide a new strategy for designing new metal–organic complex materials and their applications in energy storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 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）