ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xiaokai Huang,Wenyang Zhou,Xinwei Chen,Chunhai Jiang,Zhimin Zou
Niobium tungsten oxides (Nb-W-O) have been verified as promising Li storage anodes because of their similar working voltage and cycling stability to Li 4 Ti 5 O 12 but higher specific capacity than the latter. However, the phase and microstructural evolutions of a designated Nb-W-O compound during sintering as well as its possible application in Li-ion hybrid capacitors have not been reported. In this work, micro-sized phase pure Nb 14 W 3 O 44 is obtained by sintering a solvothermal-derived precursor at about 1050 °C, which as a Li-ion insertion host exhibits not only high reversible specific capacity up to 226 mAh g −1 at 0.04 A g −1 , but outstanding rate capability (137 mAh g −1 at 6 A g −1 ) and cycle stability (74.2% capacity retention at 2 A g −1 after 1000 cycles). Such an excellent rate capability enables the Nb 14 W 3 O 4 anode highly matchable to the capacitive cathode and yields high energy densities of 64.6 and 29.2 Wh kg −1 at 198.9 and 14,576 W kg −1 , respectively, in Li-ion hybrid capacitors, along with a high capacity retention of 83.9% after 3,000 cycles at 1 A g −1 . With these excellent electrochemical energy storage performances and a high packing density , the micro-sized Nb 14 W 3 O 44 can be a very promising anode material for both Li-ion batteries and Li-ion hybrid capacitors towards high energy-power outputs.
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
·
2024
·
IF 9.4
Weining Li,Xiaping Lu,Bernard Wiafe Biney,Junfeng Li,Yingchun Yan,Kun Chen
Heteroatom-doped carbon has been widely investigated as anode materials for sodium-ion batteries (SIBs). However, simplifying the preparation process and precisely controlling their microstructure to achieve excellent Na + storage performance remain significant challenges. Therefore, in this study, high-performance N, P co-doped Na + storage carbon anode electrode materials were prepared by one-step carbonization using N, P-rich Eichhornia crassipes (EC) as raw materials and systematically tested for their Na + storage performance. The doping levels of N and P atoms as well as the spatial structure of the carbon material were adjusted by changing the carbonization temperature during the pyrolysis process. Among them, the anode material corresponding to 1300 °C (EC-PN1300) showed an excellent Na + storage capacity of 336 ± 4 mAh g −1 (50 mA g −1 ) and excellent cycling stability (99.8 % retention after 2000 cycles). In addition, the Na + storage mechanism of EC-PN1300 was systematically analyzed using galvanostatic intermittent titration (GITT), ex-situ XPS and in-situ Raman spectroscopy, providing accurate research directions for developing carbon anode electrode materials with superior electrochemical performance. This study not only provides some insights into the preparation of carbon anode materials in alkali metal batteries and the development of carbon materials in other fields, but also realizes the interaction between environmental protection and new energy development.
研究领域:
材料科学
·
能源研究
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JAPANESE JOURNAL OF APPLIED PHYSICS
·
2025
·Vol. 64
·期 5
·051002
·
IF 1.8
Han Zheng,Dongxu Pan,Ling Zhang,Zhengfa Li,Jinping Li,Zhirong Guo
The design of high-performance dielectrics is critical for next-generation capacitors and electronic devices. Herein, (1-x)NaNbO3-xNdFeO3 bulk ceramics were synthesized to investigate the effects of Nd3+/Fe3+ substitution on their dielectric and energy-storage properties. It is revealed that the narrow single polarization–electric field (P–E) loop evolved from double loops to enhance energy-storage performances with increasing x. The maximal recoverable energy-storage density of 1.673 J cm−3 and the efficiency of 76.7% were obtained at x = 0.06 and 0.08, respectively. Moreover, a negative relative permittivity in specific frequency ranges was the answer for the oscillation of domain walls. These results not only suggest that the substitution of Nd3+/Fe3+ optimizes the energy-storage properties of NaNbO3-based ceramics, but also provides a feasible strategy for functional design in electromagnetic metamaterials.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yuhua Yan,Shuixin Xia,Hao Sun,Yuepeng Pang,Junhe Yang,Shiyou Zheng
Phosphorus (P) has been regarded as one of promising anodic materials for Li- and Na-ion batteries owing to the merits of high theoretical specific capacity and natural abundance. Nevertheless, its practical applications suffer from huge volumetric change during cycling and low electronic conductivity with the result of fast capacity decay and low Coulombic efficiency (CE). To be noted that, amorphous red P (RP) is universally used as the SIB anodic material in most of the reported works. Herein, we successfully construct crystalline red P (CRP) nanorods confined within 3D rGA (CRP-rGA) architecture composite via prepositioned nanoseeds following with secondary growth method. The unique composite was investigated as anode for sodium-ion batteries (SIBs) for the first time and presents competitive sodium storage performance. For instance, with an ultra-high P loading (75.9%) in the electrode, it delivers an initial specific capacity of 2427 mA h g −1 (93.5% of the theoretical capacity) with Columbic efficiency of ~82% at 0.1 A g −1 , and the relatively higher capacity can be retained at 1 and 2 A g −1 with progressive cycling. The evolutions of CRP-rGA during charging and discharging have also been investigated systematically through ex-situ characterizations such as XPS, TEM, Raman and SEM. It is believed that the good electrochemical Na-ion storage performance of the CRP-rGA composite can be attributed to high dispersion of CRP in rGA , strong interaction between CRP and rGA together with unique porous structure of the electrode. This work may provide some new insights into alloy reaction of crystalline phosphorus and demonstrate a promising new anode design strategy for next-generation batteries.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Nano Research
·
2017
·Vol. 11
·期 2
·1135-1145
·
IF 7.354
Jia Jingchun,Hu Xiang,Wen Zhenhai
A strategy was developed to fabricate a set of MnO@C nanohybrids with MnO nanoparticles (NPs) embedded in an ultrathin three-dimensional (3D) carbon framework for use as anode materials for lithium-ion batteries (LIBs). The 3D carbon frameworks provide MnO NPs with electrical pathways and mechanical robustness, which efficiently improved the reaction kinetics, prevented the MnO from fracturing and agglomerating, and limited the formation of a solid electrolyte interface (SEI) at the MnO–electrolyte interface. Benefitting from the unique 3D framework structure, the MnO/C nanohybrids carbonized at 500 °C exhibited a highly reversible specific capacity of 1,420 mAh·g −1 at 0.2 A·g −1 , excellent cycling stability with 98% capacity retention, and enhanced rate performance of 680 mAh·g −1 at 2 A·g −1 . The feasibility of the large-scale production of such MnO/C nanohybrids, associated with their outstanding Li-ion storage properties, opens a promising avenue for the development of high-performance anodes for nextgeneration LIBs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2020
·
IF 2.906
Shanshan Xiong,XianMeng Lin,Shuai Liu,Shuting Weng,Shuyan Jiang,Yang Jiao,Yanchao Xu,Jianrong Cheng
Transition metal oxide , α-Fe 2 O 3 , has attracted great interest as a kind of potential battery-type electrode material due to its high theoretical specific capacity. However, α-Fe 2 O 3 still suffers from poor conductivity and large volume expansion during charge and discharge process. Herein, for the first time, the oxygen vacancies-modifying α-Fe 2 O 3 are prepared via a novel two-step calcination of MIL-88-Fe (Fe-MOF) template. Note that the incorporation of oxygen vacancies into α-Fe 2 O 3 nano-octahedron will promote faster charge storage kinetics and enables the α-Fe 2 O 3 structure to be retained during the Li-ions. The oxygen vacancies-modifying α-Fe 2 O 3 nano-octahedron exhibits high specific capacity (250.2 mAh g −1 ), and an activated carbon (AC)//α-Fe 2 O 3 hybrid supercapacitor is constructed, delivering a high energy density of 63 W h kg −1 at a power density of 900 W kg −1 . This finding underlines the importance of incorporating oxygen vacancies into battery-type electrode materials for promoting the practical application.
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
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Guiwei Yan,Liqin Xu,Bijun Fang,Shuai Zhang,Xiaolong Lu,Xiangyong Zhao,Jianning Ding
A novel dual priority strategy of strengthening charge compensation in A-site of perovskite structure and widening bandgap width was designed to prepare (Ba 0.98- x Li 0.02 La x )(Mg 0.04 Ti 0.96 )O 3 (BLLMT x ) ceramics, which can solve the conflict between polarization and breakdown strength, and improve the pulse energy storage performance of the BaTiO 3 -based system. As a result, ultrahigh discharge energy density of 3.98 J/cm 3 and giant pulse power density of 321.6 MW/cm 3 with current density of 2786.4 A/cm 2 are obtained at 360 kV/cm for the (Ba 0.94 Li 0.02 La 0.04 )(Mg 0.04 Ti 0.96 )O 3 (BLLMT 0.04 ) ceramics with considerable fast discharge rate and outstanding temperature stability as well as cycle life, correlating with multi-ferroelectric phases coexistence, increasing bandgap width, strengthening charge compensation and establishing small size of the polar nano-regions (PNRs), which exceeds the great mass of reported lead-free ceramics. The comprehensive properties indicate that the BLLMT 0.04 ceramics present potential application in pulse energy storage system. The concept of composition design via increasing bandgap width and strengthening charge compensation provides a new idea for developing lead-free dielectric ceramic capacitors.
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 Energy Storage
·
2022
·
IF 8.907
Yi Zhang,Pengcheng Xie,Chunhai Jiang,Zhimin Zou
Nitrogen and oxygen co-doped micro-foam like mesoporous carbons are prepared from gelatin, an abundant hydrolyzed product of animal collagen with high carbon content and fruitful heteroatoms. Benefiting from the swelled structure of gelatin after pre‑carbonization at 300 °C, the following moderate chemical activation with KOH results in highly mesoporous carbons with specific surface area over 3000 m 2 g −1 and total pore volume larger than 1.96 cm 3 g −1 while preserving the micro-foam structure. As cathode materials of zinc ion capacitors (ZICs), the carbon micro-foams display very encouraging energy storage performance in both organic and aqueous electrolytes. A high energy density of 90 Wh kg −1 is obtained at a power density of 445 W kg −1 in 1 M Zn(CF 3 SO 3 ) 2 /DMF ( N , N -dimethylformamide) electrolyte, whereas in 1 M ZnSO 4 aqueous electrolyte the ZIC exhibits much better rate capability (54 Wh kg −1 at 14650 W kg −1 ) possibly due to the better wettability and higher ionic conductivity. These excellent electrochemical properties suggest that the N and O co-doped mesoporous carbon micro-foams derived from gelatin can be potential cathode materials of high-performance Zn-ion capacitors.
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 SURFACE SCIENCE
·
2023
·
IF 6.7
Fan Zhao,Siqi Gong,Huiting Xu,Meng Li,Lina Li,Junjie Qi,Honghai Wang,Chunli Li,Wenchao Peng,Jiapeng Liu
As candidates of the next generation batteries, aqueous zinc-ion batteries (ZIBs) have drawn widespread attention owing to the advantages of environmental friendliness, low cost and ultrahigh theoretical capacity. In order to obtain superior zinc ions (Zn 2+ ) storage ability, the cathode materials with eminent electrochemical property are placed great expectations. Herein, the hierarchical 3D a-V 2 O 5 @Ti 3 C 2 T x microsphere is prepared by a simple spray drying process. In the heterostructure, the amorphous V 2 O 5 not only endows abundant active sites for Zn 2+ storage but also effectively alleviates Ti 3 C 2 T x MXene nanosheets restacking. Meanwhile, the presence of conductive Ti 3 C 2 T x MXene framework significantly enhances the conductivity and reaction kinetics of the electrode material. As a result, the 3D a-V 2 O 5 @Ti 3 C 2 T x exhibits an impressive Zn 2+ storage ability, including the high reversible capacity (604 mAh g −1 at 0.5 A g −1 ), the superior rate performance and the splendid cycling stability. Furthermore, the relevant mechanism is illustrated via various characterizations. Moreover, the as-fabricated pouch ZIBs based on the 3D a-V 2 O 5 @Ti 3 C 2 T x displays a potential practical application prospect as flexible energy storage devices. Hence, this work may provide an inspiration for the rational design of high performance ZIBs cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Li Ao,Liang Ying,Zhang Zhen,Fang Bin
It has been widely recognized that the structure, composition, and morphology of materials determine their properties. Sulfur-doped nickel cobalt hydroxide (S-Ni 1− x Co x (OH) 2 ) nanostructures were synthesized directly on the surface of stainless steel wire mesh via a one-step facile electrodeposition route. Comparative experiments have shown that the presence of thiourea can inhibit the reduction of nickel and cobalt ions, while promoting the formation of hydroxides and further sulfurization, thereby obtaining sulfur-doped nickel cobalt hydroxide nanostructures. The doping of sulfur has been found to improve the specific capacities of the monometallic hydroxides (Ni(OH) 2 and Co(OH) 2 ), while the synergistic effect between Ni and Co has a more pronounced impact on energy storage performance. In addition, the molar ratio of nickel to cobalt can affect the morphology of material. S-Ni 0.5 Co 0.5 (OH) 2 with a favorable morphology of nanosheet array, and porous structure exhibits the highest specific capacity, optimal rate performance, and improved cycling stability among the studied electrodes. In 1 M KOH electrolyte, the specific capacities of S-Ni 0.5 Co 0.5 (OH) 2 electrode at current densities of 1 and 10 A g −1 are 488 and 275 C g −1 , respectively, and the capacity retention is 56.6% after 10,000 cycles at the current density of 10 A g −1 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Tingyu Zhao,Ruirui Cui,Kaixin Guo,Min Zhang,Xu Wang,Jun Zhang,Chaoyong Deng
In this work, by doping the B-site of BaTiO 3 with Mg elements, we have prepared BaMg x Ti 1- x O 3- x (BM x T) films with superparaelectric behaviors. The microstructures, polarization behaviors, breakdown strength, leakage current density, and energy storage performance are investigated systematically of the BM x T films. The breakdown strength of the film reaches 7.5 MV/cm when x = 0.18, at the same time, excellent energy storage density (67.7 J/cm 3 ) and energy storage efficiency (94.9 %) are obtained, which is attributed to the doping of the acceptor element Mg. By doping Mg with a lower chemical valence state to form defect dipoles in the lattice, the breakdown strength and polarization properties of the film are improved while reducing the crystallinity of the film, forming a hysteresis loop with superparaelectric properties. This work provides a feasible route to design superparaelectric materials with simple compositions for high-performance capacitive energy-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
OPTICAL MATERIALS
·
2022
·
IF 3.754
Bo Zhang,Jie Luo,Zhi Chen,Yuanshun Xiang,Lu Tang,Hongyi Jiang,Yuanyuan Tian,Shengli Liu
The development of high-quality cathode material is of important value to the research of bifunctional electrochromic energy storage device. Therefore, Nb-doped TiO 2 mesoporous film as the high-performance cathode was prepared via a facile sol-gel technology successfully. The Nb doping content has great effects on the crystallinity and chemical state of TiO 2 films. Compared to the pure TiO 2 film, the optimum Nb-doped TiO 2 film exhibits the excellent optical-electrochemical performance including highest large-rate capability, largest specific capacity (62.4 mAh/g), short switching time (3.4 s/4.5 s) and large transmittance modulation (50.7%). These data indicate that Nb-doped TiO 2 mesoporous films possess the important application prospect.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）