ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 16
·2313241
·
IF 18.5
Cuicui Li,Liang Hu,Xiuyun Ren,Lu Lin,Changzhen Zhan,Qingsong Weng,Xiaoqi Sun,Xiaoliang Yu
Small molecule quinone compounds are attractive cathode materials for rechargeable aqueous zinc-organic batteries (AZOBs) because of their structural diversity and low-cost merits. Among them, nonpolar quinones are dominant given the relatively low solubilities in aqueous electrolytes. However, their poor electronic conductivity and accumulated Coulombic repulsion lead to underutilized active sites and sluggish redox kinetics. Here, polar 2,6-dimethoxy-1,4-benzoquinone ( m -DMBQ) works as an advanced AZOB cathode with unexpectedly superior performance over the nonpolar isomer of 2,5-dimethoxy-1,4-benzoquinone ( p -DMBQ). The asymmetric charge distribution of active centers in the p−π conjugated backbone of m -DMBQ induces reduced bandgap with improved electronic conductivity and redox activity, thus achieving a high specific capacity of 312 mAh g −1 approaching the theoretical limit. Additionally, the lowest unoccupied molecular orbital energy level is lowered for an increased average discharge voltage of 0.88 V. Characterizations and computational studies revealed boosted competitiveness of H + relative to Zn 2+ for significantly enhanced charge transfer kinetics and reversibility. As a result, the as-fabricated AZOB achieves a high energy density of 275 Wh kg −1 based on m -DMBQ along with high-rate capability and long-term cycling stability. This work provides a new molecular engineering strategy through regulating charge distribution symmetry for boosting charge storage in organic cathodes.
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
·
2025
·
IF 9.8
Hao Zheng,Yaohang Gu,Kailong Ma,Xiaoyan Zhang,Xiwei Qi
High-performance dielectric capacitors are essential due to their exceptionally high instantaneous power density and rapid charge-discharge rates. To date, lead-free ceramic capacitors still face the challenge of low energy storage density. In this study, an entropy-driven optimization strategy was employed to enhance energy storage performance. As a result, the manipulation of configurational entropy in 0.62Sr 0.7 Bi 0.2 TiO 3 –0.38K 0.5 Bi 0.5 TiO 3 compounds (KBT-SBT) is realized by adding different amounts of Re 2 O 3 (where Re = La, Nd, Sm). Entropy-driven effects inhibit grain growth and, at the same time, limit the development of ferroelectric domains. Accordingly, the refinement of ferroelectric domains not only increased the breakdown field strength but also improved the energy storage efficiency. Moreover, doping KBT-SBT with 1 % (La 2/3 Nd 2/3 Sm 2/3 )O 3 exhibits the optimal energy storage performance. Which the material demonstrates an impressive energy density of 4.07 J/cm 3 with the efficiency of 79.75 % when applying an electric field strength of 230 kV·cm −1 . Interestingly, at an electric field strength of 100 kV·cm −1 , it demonstrated exceptional stability across temperature, frequency, and fatigue tests. The outstanding performance of KBT-SBT based ceramics proves that our entropy-driven strategy opens a new way to understand and design dielectric energy storage materials.
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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Chang Liu,Yuhao Kong,Jianhong Zhang,Chongguang Lyu,Huifang Ma
Dielectric capacitors with high power density, cost-effectiveness, and harsh environmental working abilities have gained considerable research attention. Dielectric materials are key components of dielectric capacitors and directly influence their operational performance. Among others, high-entropy perovskites are emerging as attractive candidates for energy storage materials owing to their exceptional performance driven by the high-entropy effect. Here, a high-entropy (1- x )(Bi 0.4 Na 0.2 K 0.2 Ba 0.2 )TiO 3 - x Bi(Zn 2/3 Ta 1/3 )O 3 system for energy storage devices was designed. A systematic study was conducted to investigate the ferroelectric and dielectric properties of BNKBT-BZT high-entropy ceramics (HECs). The resultant sample exhibits strong relaxor properties and exceptional energy storage properties, with a high recoverable energy storage density ( W rec ) of 4.11 J/cm³ and an energy storage efficiency ( η ) of 84 % under an electric field of 260 kV/cm. More interestingly, the BNKBT-15BZT HECs also display outstanding thermal and frequency stability. These findings suggest that the resultant BNKBT-15BZT HECs are highly promising for applications in dielectric energy storage within low-to-moderate electric field ranges.
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
Materials Today Communications
·
2023
·
IF 3.8
Gang Chen,Cong Ji,Xue Bai,Jie Wang,Chao Chen,Zhijun Zhou,Zixuan Zhang,Zhengtan Su,Rongli Gao,Wei Cai,Xiaoling Deng,Zhenhua Wang,Chunlin Fu
(1- x ) (0.99 Na 0.5 Bi 0.5 TiO 3 -0.01BiYbO 3 )- x SrTiO 3 (abbreviated as (1- x ) (0.99NBT-0.01BY)- x STO) ( x = 0.1⁓0.4) relaxor ferroelectric ceramics were fabricated by a solid-state reaction method. The crystal structure, surface morphology as well as dielectric , ferroelectric and energy storage properties of (1- x ) (0.99NBT-0.01BY)- x STO were investigated in detail. X-ray diffraction patterns show that NBT-BY-STO ceramics have a single perovskite structure with a pseudo-cubic phase. The introduction of STO can effectively refine the NBT-based ceramic grain. The relaxation behavior of NBT-BY can be enhanced by incorporating moderate STO, and the impedance reduced with the increase of STO content. The results of hysteresis loop analysis indicate that incorporating STO into NBT-BY contributes to an increase in the electric breakdown field and a reduction in remnant polarization, thus enhancing its energy storage performance significantly. A moderate energy storage property with large W rec (∼2.5 J/cm 3 ) and high η (∼80.97%) was achieved at 260 kV/cm for x = 0.4. Meanwhile, 0.98(0.99NBT-0.01BY)− 0.2STO relaxor ferroelectric ceramic presented relatively good frequency and temperature stabilities of W rec and η . This work provides an effective strategy for enhancing the energy storage performance of NBT-based relaxor ferroelectric ceramics applied in pulsed power devices.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Minghui He,Ting Wang,Weiping Gong,Fuqing Zhao,Taotao Ai,Xing Zhao,Yang He,Meng Qi,Xinyu Chen,Xinyu Liu,Guanghua Wu,Yuxiang He,Alexander N. Vtyurin,Gang Liu,Yan Yan
There is an urgent need to develop stable and high-energy storage dielectric ceramics; therefore, in this study, the energy storage performance of Na 0.5- x Bi 0.46- x Sr 2 x La 0.04 (Ti 0.96 Nb 0.04 )O 3.02 ( x = 0.025–0.150) ceramics prepared via the viscous polymer process was investigated for energy storage. It was found that with increasing Sr 2+ content, the material transforms from a mixture of rhombohedral and tetragonal phases ( x = 0.025) to a mixture of orthorhombic and pseudo-cubic phases ( x = 0.15). The emergence of a dielectric plateau for the sample with x = 0.15 widens the applicability of the host compound. Finite element simulations show that a smaller grain size has a beneficial effect on the critical breakdown electric field and that the relaxor transformation benefits from the reduction of residual polarization ( P r ). The obtained ceramics achieve a value of 6.69 J/cm 3 for the energy storage density ( W rec ) and 89.48 % for the energy storage efficiency ( η ) under an applied electric field of 400 kV/cm, with a discharge time ( t 0.9 ) of 0.168 μs at 90 % of the energy under an electric field of 280 kV/cm, and a power density ( P d ) of 148 MW/cm 3 . This study shows a novel strategy for the modification of the dielectric and ferroelectric properties of NBT-based ceramics, providing an effective way to expand the operational temperature range and improve energy storage performance.
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
APPLIED ENERGY
·
2024
·
IF 10.1
Xunhe Deng,Cong Li,Xiaohan Sun,Chengyu Wang,Baosheng Liu,Yudong Li,Haiyue Yang
Wood-based composite phase change materials (PCMs) have considerable development potential in shape-stable thermal energy storage . However, Wood-based composite PCMs possess inflammability due to wood-based supporting materials and organic PCM , which limits its practical application. In this work, a novel strategy of wood-based composite PCMs with flame retardant coating is adopted, in which the introduction of expanded graphite (EG)-based coating can not only enhance the flame retardant property, and EG can be used as photothermal material to improve the photothermal conversion efficiency. The flame-retardant wood-based composite PCMs show excellent flame retardant properties, which peak of heat release rate (pHRR) is reduced by 40.1–52.3% compared with PEG-1000@delignified wood (DW). It is worth noting that when the amount of EG is >0.5 g, the flame-retardant wood-based composite PCMs can be completely protected in the ignition combustion test, and the combustion flame is extinguished by itself. The loading mass fraction of the PEG-1000 of the flame-retardant wood-based composite PCMs is 53.1–73.4%, which shows that it has good energy storage performance. At the same time, the flame-retardant wood-based composite PCMs still have good cycle reliability after 100 heating-cooling cycles. Due to the excellent light absorption properties of EG, the flame-retardant wood-based composite PCMs exhibit excellent photothermal conversion efficiency (68.1–80.0%), which has considerable application potential in solar energy utilization systems and thermal management.
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
RARE METALS
·
2025
·Vol. 44
·期 2
·889-900
·
IF 11
Feng Ping-Xian,Chen Qi-Liang,Yang Dong-Jie,Wang Huan
Developing high-capacity carbon-based anode materials is crucial for enhancing the performance of lithium-ion batteries (LIBs). In this study, we presented a nitrogen-doped lignin mesoporous carbon/nickel/nickel oxide (NHMC/Ni/NiO) nanocomposite for developing high-capacity LIBs anode materials through carbonization and selective etching strategies. The synthesized NMHC/Ni/NiO-0.33 composite exhibited a highly regular microstructure with well-dispersed Ni/NiO particles. The composite had a surface area of 408 m 2 ⋅g −1 , a mesopore ratio of 75.0%, and a pyridine–nitrogen ratio of 58.9%. The introduction of nitrogen atoms reduced the disordered structure of lignin mesoporous carbon and enhanced its electrical conductivity, thus improving the lithium storage capabilities of the composite. Following 100 cycles at a current density of 0.2 A⋅g −1 , the composite demonstrated enhanced Coulomb efficiency and rate performance, achieving a specific discharge capacity of 1230.9 mAh⋅g −1 . At a high-current density of 1 A⋅g −1 , the composite exhibited an excellent specific discharge capacity of 714.6 mAh⋅g −1 . This study presents an innovative method for synthesizing high-performance anode materials of LIBs. Graphical abstract
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Congwei Wang,Yongfeng Yuan,Weiwei Yan,Shenhui Shen,Min Zhu,Gaocan Cai,Bingxu Wang
For sodium-ion batteries, nickel telluride (NiTe 2 ) is an excellent anode material. However, significant volume changes and slow kinetics compromise its structural stability and its capacity for high-current reactions. To increase sodium storage performance, NiTe 2 nanoparticles are synthesized in situ within hollow porous carbon spheres (NiTe 2 @HPCS) through a “drop-dry” process, vacuum-assisted adsorption, and vapor tellurization. Then, a large number of NiTe 2 @HPCS particles are densely encapsulated in carbon fibers (CFs) via electrospinning and carbonization (NiTe 2 @HPCS/CF). In coin-type half cells, NiTe 2 @HPCS/CF exhibits a high and stable capacity of 432 mAh g −1 after 500 cycles at 1.0 A g −1 . When half cells are operated at 5.0 and 10.0 A g −1 , the lifespan reaches 1000 cycles and the capacities sustain at 332 and 195 mAh g −1 . The cycled electrode materials preserve the intact composite structure, demonstrating remarkable robustness. Kinetic investigation affirms swift electron and Na + conduction within NiTe 2 @HPCS/CF. Furthermore, in Na 3 V 2 (PO 4 ) 3 //NiTe 2 @HPCS/CF full cells, NiTe 2 @HPCS/CF also exhibits favorable cycling stability. At 1.0 and 5.0 A g −1 after 300 and 500 cycles, reversible capacities reach 299 and 172 mAh g −1 , respectively. The outstanding performance is associated with the unique dual carbon encapsulation structure: HPCSs effectively confine NiTe 2 nanoparticles, maintaining their high electrochemical activity and promoting the sodiation/de-sodiation reactions. CFs further reinforce structural stability and electron conduction of NiTe 2 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Tianran Zhang,Bofeng Shi,Siyu Zhang,Mengfan Song,Jiping Wang,Lixue Zhang,Fang Kang
Due to the development of advanced electronic systems, there is an urgent need for polymer dielectric film capacitors with high breakdown strength ( E b ) and high discharge energy density ( U d ) at elevated temperatures. Herein, an all-organic blend polymer composite is fabricated by blending polyetherimide (PEI) and a trace amount of Poly(vinylidene fluoride) (PVDF), achieving nanoscale phase separation and forming interfaces between PEI and PVDF grain. The real permittivity ( ε r ) and E b of blend composites are simultaneously enhanced after PVDF introduction. It is worth noting that increasing the temperature does not reduce the E b of the PEI/xPVDF blend composite. Our Study shows that optimizing the plasticity and storage modulus of PEI/xPVDF significantly contributes to maintaining E b at elevated temperatures. Additionally, high temperatures enhance the entanglement of molecular chains at the PVDF-PEI interface, further supporting the preservation of E b . Finally, a high E b of 540 MV/m, a high U d of 5.92 J/cm 3 are achieved for the PEI/0.5PVDF blend at 150 °C. This work presents a new approach to enhance the E b of dielectric polymers by optimizing mechanical properties at high temperature, which providing a different strategy for enhancing the energy storage performance.
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
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 5
·2963-2971
·
IF 3.9
Nan Weng,Ji Zhang,Jiajia Wang,Tianze Pan,Jing Wang,Yaojin Wang
Ceramic capacitors with high electrostatic energy storage performances have captured much research interest in latest years. Sodium bismuth titanate (Na 0.5 Bi 0.5 TiO 3 )-based ferroelectric ceramics show great potential due to their environment-friendly composition, high polarization, and excellent relaxor properties. However, the nonergodic relaxor state of Na 0.5 Bi 0.5 TiO 3 -based ceramics hampers the decrement of remanent polarization, leading to poor energy storage performance. Herein, the (1 − x )Na 0.5 Bi 0.5 TiO 3 – x La(Ni 2/3 Ta 1/3 )O 3 ceramics were designed to generate the transformation between nonergodic and ergodic relaxor state. As a result, the ceramics exhibit improved dielectric relaxation, slim polarization–electric field loops, and flattened current–electric field curves due to highly dynamic polar nanoregions. Particularly, the 0.85Na 0.5 Bi 0.5 TiO 3 –0.15La(Ni 2/3 Ta 1/3 )O 3 ceramics show large breakdown electric field E b (345 kV/cm), high recoverable energy density W rec (3.6 J/cm 3 ), and efficiency η (80.6%), revealing potential applications in electrostatic energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yun Luo,Chengxiang Wang,Xianfen Wang
We report CoFe 2 O 4 and carbon nanotubes hybrid aerogels as a novel anode material for potassium ion batteries (KIBs). The synthetic route take the advantage of marine biobased materials as the precursor and facilely produce large-scale production of hybrid CoFe 2 O 4 and carbon nanotubes aerogels as the advanced anode. The hybrid aerogels deliver a remarkable capacity of 180 mAh g −1 with high stability over 200 cycles at a current density of 0.1 A g −1 . The high rate charge/discharge reveals a relatively high capacity of 83 mAh g −1 even at the current density of 1.0 A g −1 . In-situ XRD investigations reveal the phase evolution during charge/discharge, demonstrating the high stability of hybrid aerogels for the potassium intercalation/extraction. The high specific surface area and large numbers of mesopores with more active sites can benefit the effective transmission of electrons and K ions , leading to an improved specific capacity and cycle stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 5
·期 1
·266-274
·
IF 8.262
Man Huang,Kan Mi,Junhao Zhang,Huili Liu,Tingting Yu,Aihua Yuan,Qinghong Kong,Shenglin Xiong
To tackle the issue of the low specific capacity (372 mA h g−1) of graphite as the anode material for lithium-ion batteries (LIBs), an effective and controllable strategy was developed to construct porous bimetallic Co/Zn embedded N-doped carbon (Co–Zn/N–C) polyhedral nanocages via annealing a ZIF-8@ZIF-67 precursor at 800 °C under Ar atmosphere. The results clearly displayed that metallic Co and Zn particles are uniformly dispersed in the carbon matrix. Porous Co–Zn/N–C polyhedral nanocages have a large specific surface area of 349.12 m2 g−1 and contain plenty of micropores and mesopores, which benefit from the carbonization of organic ligands and the catalytic effect of cobalt in the calcination process. As anodes for LIBs, the porous Co–Zn/N–C polyhedral nanocages showed an initial discharge capacity of 809 mA h g−1 and a capacity retention of 702 mA h g−1 after 400 cycles at a current density of 0.2 A g−1. Furthermore, a reversible capacity of 444 mA h g−1 was obtained at a much higher current density of 2 A g−1. The improved electrochemical performance was attributed to the synergistic effect of Zn and Co, the unique porous hollow structure as well as N doping, which relieved the impact of volume changes, maintained perfect electrical conductivity throughout the electrode and enhanced the electrochemical activities of lithium storage.
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
危险品化学品经营许可证（带存储）