MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Fujia Ben,Dan Xu,Xinyuan Zhou,Taolin Yu,Jiale Wei,Wenjie Zhao
Based on the synergistic roles of defect dipoles and MnO 2 sintering aid, 0.8BaTiO 3 -0.2BiScO 3 (BTBS 0.2 ) ceramics with and without 0.3 wt% MnO 2 were prepared by a solid-phase reaction route. The impacts of MnO 2 dopant and sintering conditions on the crystalline structure, micro-morphology, dielectric, and energy storage properties were investigated in detail. The X-ray diffraction (XRD) and Raman results demonstrate the coexistence of tetragonal (T) and pseudo-cubic (pC) phases. The increased pC phase content caused by MnO 2 modification is beneficial for the improvement of the relaxation degree. The O 1s fine spectra of X-ray photoelectron spectroscopy (XPS) confirms a remarkable increase in the concentration of oxygen vacancy due to the acceptor Mn dopant, indicating the valence changes of Mn ions from Mn 4+ to Mn 3+ /Mn 2+ . The reduced dielectric loss is induced by the improved density and the pinning effect from the defect dipoles, thereby yielding a higher E b . An optimal energy density of W rec = 0.70 J/cm 3 with a high energy efficiency of η = 95.8 % at 140 kV/cm was realized in the BTBS 0.2 +Mn ceramic composition sintered at 1300 °C. Moreover, the ceramic also exhibits good temperature stability (30–120 °C). Therefore, the BTBS 0.2 +Mn ceramics have a promising application prospect in the energy storage field.
研究领域:
材料科学
·
电介质物理
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Yuelin Lu,Jie Bai,Binbin Sun,Nannan Li,Zhenhuai Yang,Hailing Yu,Cong Wang,Cong Gu,Huan Liu,Peng Tang,Qiang Wang
MXene materials exhibit substantial energy storage capabilities owing to their high specific surface areas, tunable interlayer spacings, and excellent electrical conductivities. However, these layers are prone to re-stacking, negatively affecting the energy storage capacity of the material. Herein, through a process involving liquid nitrogen-assisted freeze-drying and subsequent annealing, Ti 3 C 2 T x nanosheets were combined with polyvinyl alcohol (PVA) polymer chains via hydrogen bonding to produce MXene and PVA-derived carbon composite aerogels (MPAs) with microstructures ranging from ordered to disordered arrangements. The incorporation of PVA inhibited nanosheet stacking, and PVA carbonization enhanced the electrical conductivity of the aerogel. The carbonized aerogel (MPA2.0) exhibited a larger specific capacitance along with a more disordered and denser microstructure, thereby accounting for the increased capacitance due to enhanced ion storage in the more structurally disordered carbon nanopores. The optimized MPA aerogel demonstrated a high power density, along with an excellent specific capacitance (MPA2.0 = 348.14 F g −1 , 2 mV s −1 scan rate), and a cycling stability of 92.52 % after 10,000 charge/discharge cycles. Furthermore, the MPA2.0-based supercapacitor obtained an impressive energy density (37.8 Wh kg −1 ) and an exceptionally high power density (1800 W kg −1 ) at a current density of 1 A g −1 . By adjusting the PVA loading, the shrinkage and stress–strain characteristics of the microstructure during freeze-drying and carbonization were altered, and the microstructural orientation of the resulting aerogels was controlled. The increased disorder in the aerogel enhanced its capacitor energy storage ability, providing a new approach for the design of multi-component high-performance hybrid supercapacitor electrodes.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACTA MATERIALIA
·
2024
·
IF 8.3
Kun Wei,Jianhong Duan,Gaosheng Li,Huifen Yu,He Qi,Hao Li
Multi-phase NaNbO 3 (NN) exhibits high adjustability on the ordering of both polarization and oxygen octahedral tilt, becoming a perfect carrier to design heterogeneous structure for boosting comprehensive energy storage properties. To balance the energy storage density and efficiency, the coexistence of the relaxor antiferroelectric (AFE) with high polarization capability and the relaxor ferroelectrics (RFE) with high efficiency is designed in this work by introducing Sr 0.7 Bi 0.2 □ 0.1 Ti 0.75 Ta 0.2 □ 0.05 O 3 (SBTT) into NaNbO 3 -BiFeO 3 . As a result, an outstanding capacitive energy density ( W rec ) of 12.25 J cm −3 with a high η of 83 % can be achieved in NN-BF-SBTT ceramic, which can be identified as a novel heterogeneous coexisting structure with the crossover of high polarization capability in relaxor AFE and high efficiency in RFE in terms of high-resolution TEM. Furthermore, grain refinement and the dense structure inhibit the leak current, suppress the concentration of oxygen vacancy defects and raise the activation energy ( E a ), thus enhancing the E B . These excellent energy storage properties overcome the trade-offs between the two sets of parameters ( W rec - η , Δ P - E B ), offering a refreshing strategy for the development of high-performance ceramic capacitors.
研究领域:
材料科学
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能源存储技术
·
陶瓷材料
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2014
·
IF 3.541
Nan Zhang,Yanping Yuan,Yaguang Yuan,Xiaoling Cao,Xiaojiao Yang
The effect of carbon nanotubes (CNTs) on thermal behavior of palmitic–stearic acid binary eutectic mixture (PA–SA) was investigated experimentally. Four samples of PA–SA/CNTs composite phase change materials (PCMs) with mass fractions of CNTs of 5–8 wt.% at an increase of 1 wt.% were prepared. The thermal properties of the PA–SA/CNTs composite PCMs characterized by Differential Scanning Calorimeter indicated that the phase change temperatures and latent heats of the composites changed slightly as the change of the mass fraction of CNTs. The thermal conductivities of the PA–SA/CNTs composite PCMs increased by 20.2%, 26.2%, 26.2% and 29.7% respectively when the mass fractions of CNTs were 5 wt.%, 6 wt.%, 7 wt.% and 8 wt.%. The thermal performance test results showed that the thermal release rate of the prepared composite PCMs increased due to the addition of CNTs while the storage rate decreased. Thermal cycling test results revealed that the PA–SA/CNTs composite PCMs performed well in thermal reliability.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2021
·
IF 4.311
Fuming Wu,Jianping Gao,Saisai Zuo,Wei Wang,Haixia Qiu
In this paper, Cu 2 O-loaded S-doped worm-like hierarchical porous carbon flakes (SCu-HPCFs) have been prepared for supercapacitor applications by using cheap sweet potato starch as a raw material via a controlled carbonization–activation-hydrothermal reaction process. The as-prepared SCu-HPCFs possess hierarchical porous structure, large specific surface area (2543.68 m 2 g −1 ), s doping state and good electrical conductivity. The SCu-HPCFs electrode exhibits a high specific capacitance of 451 F g −1 at 1 A g −1 and good rate capability (retention of 79% from 1 to 15 A g −1 ). Moreover, the asymmetric supercapacitor assembled using the SCu-HPCFs as a negative electrode and NiO/RGO as a positive electrode shows a high energy density of 30.2 W h kg −1 at a high power density of 800.4 W kg −1 and can still achieve 23.5 W h kg −1 at 8070.9 W kg −1 . At the same time, it has excellent cycling stability (90.8% retention after 10,000 cycles). The high capacity performance can be attributed to rich porous structure, high specific area and pore volume, Faraday contribution caused by S doping and the fast redox reaction of Cu 2 O.
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
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
You Zhou,Zhengyong Huang,Huijun Liao,Jian Li,Hanxiang Wang,Yu Wang
Graphene, as a family of 2D materials , can be used as film electrodes in energy storage devices because of its high surface area, electrical conductivity , and environmental stability. However, the pure graphene electrode attains aggregating nature, which significantly limits its practical application. To solve the overstacking problems, we construct a 3D porous reduced graphene (rGN) film by a novel and green Cu 2 O template-assisted route based on “coordinating etching and precipitating” process. Noticeably, a brand new material-NiCo 2 O 4 is generated when the template is removed by optimizing the coordinating etchant and the reaction conditions. It is observed that NiCo 2 O 4 perfectly imitates the shape of Cu 2 O template and has a hollow hydrangea-like structure. Furthermore, these emerging hollow NiCo 2 O 4 hydrangeas not only prevent the re-accumulation of sheet layers, but also afford 3D porous structure for film, and greatly enhance the energy storage properties on account of the pseudocapacitance of NiCo 2 O 4 . The 3D graphene/NiCo 2 O 4 film (3D rGN/NiCo 2 O 4 ) exhibits high specific capacity of 708.36 F g −1 at 1 A g −1 , remarkable rate performance of 582.11 F g −1 even at 16 A g −1 , and superior circulation ability with 94.3% capacitance retention after 6000 cycles at 10 A g −1 , indicating the potential applications in energy storage.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Bo Zheng,Wang Rui,Wang Bin,Sunny Sanjay,Zhao Yuping,Ge Kangkang,Xu Kui,Song Yajing,Raymundo-Piñero Encarnacion,Lin Zifeng,Shao Hui,Yu Qian,Yan Jianhua,Cen Kefa,Taberna Pierre-Louis,Simon Patrice
Clarifying the relationship between ion desolvation, ion-electrode interactions, and charge storage capacity during ion intercalation in host electrode materials is crucial for advancing fast and efficient energy storage systems. However, the absence of direct evidence for ion desolvation and lack of detailed understanding of the interactions between surface terminations and intercalated cations (Li ions)/solvents hinder the exploration of their effects on energy storage mechanisms. In this paper, we study the intercalation of Li ions from a non-aqueous electrolyte in two-dimensional metal carbides Ti 3 C 2 MXenes with different surface chemistries: HF-Ti 3 C 2 (F-, OH- and O-terminated) and MS-Ti 3 C 2 (O- and Cl-terminated) MXenes. We are able to visualize the full ion desolvation and solvents-ions co-intercalation in the interlayers of MS-MXene and HF-MXene, respectively at the atomic scale. The combination of several techniques and characterization tools reveal that the complete ion desolvation in Cl- and O-terminated MS-Ti 3 C 2 MXenes is associated with the formation of a dense solid electrolyte interface layer, resulting in improved charge storage capacity. The O-rich surface terminations of MS-MXenes are found to be responsible for the efficient Li ions storage. These findings shed lights on identifying the critical role of non-electrostatic ion-electrode interactions and ion desolvation in designing high-performance energy storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 47
·19086-19093
·
IF 5.7
Xiaowei Zhu,Wei Liu,Guobin Zhu,Siyu Xiong,Deqin Chen,Xiuyun Lei,Laijun Liu,Chunchun Li
The present study reports on entropy-engineered perovskite ceramics (Ca1/3Sr1/3Ba1/3)(SnxTi1−x)O3 (CSBTO-xSn) with varying Sn-doping levels (x = 0.1, 0.2, 0.3), achieved through synergistic compositional design in both the A-sites and B-sites of the perovskite. Increasing the Sn-doping content induces a transition in configuration entropy from medium to high values. Notably, at an optimal composition of x = 0.1, the ceramic exhibits exceptional energy storage characteristics including an ultrahigh recoverable energy density (Wrec) of 5.05 J cm−3 and a high efficiency (η) of 82.56% at an electric field strength (Eb) of 540 kV cm−1 over a wide temperature range spanning from 30 to 100 °C and frequencies ranging from 1 Hz to 200 Hz. Furthermore, this ceramic demonstrates remarkable charge–discharge properties with a discharge energy density (Wdis) of 2.94 J cm−3 and a rapid discharge rate of t0.9 ∼ 67 ns. This study underscores the effectiveness of entropy engineering as a viable approach for developing advanced energy storage capacitors.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 7
·1-12
·
IF 2.8
Xie Le-Tian,Zhou Xiao-Xiao,Tang Yu-Cheng,Yin Yang,Hao Yijin,Pei Jun,Zhang Bo-Ping
With the increasing demand for portable electronics, power electronics and other devices, energy storage materials with high power density and large energy storage density are becoming more and more important. BiFeO 3 -BaTiO 3 lead-free ferroelectric ceramics are deemed as a potential lead-free energy storage material due to their high spontaneous polarization and high Curie temperature. However, high remanent polarization has become a serious obstacle to its practical application. In this work, 0.67Bi (1- x ) Sm x FeO 3 -0.33BaTiO 3 (BS x F-BT, 0 ≤ x ≤ 0.10) was prepared by the conventional solid phase sintering method. The phase transforms from rhombohedral to pseudocubic, and the dielectric and electrical data reveal that relaxor ferroelectrics are favorable for achieving the small size polar nanoregions and enhanced relaxation behavior. Due to enhanced relaxation behavior by doping Sm 3+ , the recoverable energy storage density ( W rec ) reaches 1.99 J/cm 3 , and the energy storage efficiency ( η ) is 57% at a low electric field (190 kV/cm), which is higher than the undoped ceramic ( W rec = 0.272 J/cm 3 and η = 26%). This work also puts forward the concept of Ergodic relaxor ferroelectrics and Non-ergodic relaxor ferroelectrics to explain the improvement of energy storage performance.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Journal of Advanced Dielectrics
·
2019
·
IF 0
Yue-Mao Dang,Ming-Sheng Zheng,Jun-Wei Zha
The influence of thermal treatment on the dielectric properties and energy storage performances of a classical dielectric nanocomposite system (barium titanate/polyvinylidene fluoride PVDF) was discussed systematically. The results demonstrated that the permittivity of thermal treated nanocomposites increased and dielectric loss decreased compared with the untreated system. In addition, the energy density was also greatly improved due to the inclined residual polarization. For example, the energy density of the treated nanocomposite with 50 vol.% nanofillers was 3.14 times higher than the untreated nanocomposite at 50 MV/m. Moreover, the charge–discharge efficiency was also promoted from 6.36% to 56.89%. According to the viewpoint of microstructure, the improvement of the dielectric and energy storage properties would be ascribed to the suppression on void defects in the interphase of dielectric nanocomposite by employing the thermal treatment process. Finally, thermal treatment turns out to be a simple and an effective method to improve the dielectric performances and energy storage properties in the dielectric nanocomposites.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
ACS Applied Energy Materials
·
2021
·
IF 6.024
Xiao-Lei Li,Ke-Cheng Long,Gao Zhang,Wei-Tian Zou,Shuang-Quan Jiang,De-Yi Zhang,Jiang-Qi Zhou,Mei-Jun Liu,Guan-Jun Yang
Integrating revolutionary perovskite solar cells with energy storage devices is a very promising technology to reduce the total cost of solar power utilization. Here, for the first time, lead-free (C6H5NH3)BiI4 perovskite materials were used as light absorbers in low-cost triple-layer mesoscopic perovskite solar cells with a power conversion efficiency of 0.35%. We fabricated a dense and pinhole-free (C6H5NH3)BiI4 perovskite film via homemade gas pump treatment equipment. We discovered storage characteristics in this carbon electrode-based, hole-conductor-free, and fully printable mesoporous solar cells infiltrated by (C6H5NH3)BiI4 perovskite, which indicates that this type of device might work under dark conditions. This study may provide some useful inspiration for the further exploration of the potential of (C6H5NH3)BiI4 as a lead-free candidate for the direct storage of electric energy in solar cells.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Dongdong Huang,Li Chen,Liguo Yue,Fan Yang,Hao Guo,Wu Yang
This article aims to use nitrogen-doped metal p - π conjugated-organic frameworks and derived carbon-rich electrode materials for high-performance electrode materials. Nitrogen-doped contributes to the energy storage performance, and the p-π conjugated-organic ligands of the conjugated system can not only improve the stability of the structure, but increase the conductivity of the material. Gradient carbonization can explore the maximum electrochemical potential of MOF-B, from which the previous 1271.0 increased to 2727.5 F·g −1 at a current density of 1.0 A·g −1 . The excellent capacitance retention rate is 86.67% of the initial value at a high current density after 20,000 cycles. Besides, the MOF-B-600//AC also shows a high energy density of 63.62 Wh·kg −1 at a power density of 400 W·kg −1 and good coulomb efficiency of 90.7%. As a result, the excellent electrochemical performance of the nitrogen-doped and carbon-enriched MOF-B-600 has potential application prospects in energy storage devices.
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
危险品化学品经营许可证（带存储）