APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Hongen Shi,Yanzhong Wang,Zhen Tian,Baofeng Zhang,Li Guo,Yanjun Chen
To improve the inherent conductivity and extend the cycling durability of Na 3 V 2 (PO 4 ) 3 (NVP), this study suggests a technique for synthesis of phenol-formaldehyde (PF) resin-derived lamellar intercalated spherical NVP (PF-NVP/C) structures via solvothermal method. The unique lamellar intercalated sphere structure typically possesses good mechanical toughness, enabling better tolerance to the current impact. Moreover, spherical morphology features a significantly enlarged specific area of 144.32 m 2 g -1 , facilitating full contact between electrolyte and electrode, and providing additional active sites for Na + storage. Coupled with protective effect of carbon coating layers, the cycling stability is significantly improved. Meanwhile, highly conductive graphitized carbon skeleton from the pyrolysis of PF bonding with the uniform amorphous carbon layers constructs favourable networks for electronic transportation. Notably, the modified PF-NVP/C delivers a capacity of 115.5 mAh g -1 at 0.1 C. Remarkably, it can maintain a high capacity of 71.1 mAh g -1 and keeps 50.8 mAh g -1 even after 16000 cycles at 50 C, exhibiting outstanding cycling stability. Ex-situ XRD indicates the redox reaction of V 3+ /V 4+ is highly reversible. Furthermore, by comparing morphological and electrochemical kinetic characteristics of the PF-NVP/C before and after cycling, further evidence is provided to demonstrate its unique lamellar intercalated spherical morphology and excellent structural stability.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机非金属材料
·
纳米结构材料
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Jiaping Guan,Guomin Sun,Gaoyuan Yu,Yu Chen,Jiawen Wei,Xiaohui Zhu,Xiaogu Huang
Sodium-ion batteries (SIBs) have garnered significant interest due to their cost-effectiveness and operational similarities to lithium-ion batteries. Amongst the various components, the cathode plays a pivotal role in determining the energy density of these batteries. Mn-based layered oxides stand out as promising cathode materials, owing to their abundance and non-toxicity. However, these oxides tend to suffer from structural instability during high-voltage cycling, leading to a decline in capacity. In this work, we have designed Ce-doped Na 0.6 Li 0.2 Mn 0.79 Ce 0.01 O 2 cathodes through a solid-state reaction process. This innovation aims to inhibit undesirable phase transitions and enhance the electrochemical performance of the electrodes. By integrating electrochemical testing with a suite of characterization techniques, we have shown that 1 mol% Ce doping effectively suppresses the formation of birnessite and the irreversible oxygen redox reactions in the high-voltage region. Moreover, our findings indicate that the detrimental phase transitions can be significantly mitigated throughout the electrochemical cycling process, thereby bolstering structural stability. Notably, the capacity of the Ce-doping cathode after 20 cycles substantially exceeds its initial discharge specific capacity, reaching 169.3 mAh g –1 . This research introduces a strategy for stabilizing the cathode structure of P2-type Mn-based layered oxides through Ce-doping, offering valuable insights for the advancement of next-generation SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2017
·Vol. 8
·期 7
·1702267
·
IF 16.721
Shanshan Yao,Jiang Cui,Jiaqiang Huang,Jian-Qiu Huang,Woon Gie Chong,Lei Qin,Yiu-Wing Mai,Jang-Kyo Kim
This paper reports the rational assembly of novel hollow porous carbon nanospheres (HPCNSs) as the hosts of phosphorous (P) active materials for high-performance sodium-ion batteries (SIBs). The vaporization-condensation process is employed to synthesize P/C composites, which is elucidated by both theories and experiments to achieve optimized designs. The combined molecular dynamics simulations and density functional theory calculations indicate that the morphologies of polymeric P 4 and the P loading in the P/C composites depend mainly on the pore size and surface condition of carbon supports. Micropores of 1–2 nm in diameter and oxygenated functional groups attached on carbon surface are essential for achieving high P loading and excellent structural stability. In light of these findings, HPCNS/amorphous red phosphorus composites with enhanced structural/functional features are synthesized, which present an extremely low volume expansion of ≈67.3% during cycles, much smaller than the commercial red P's theoretical value of ≈300%. The composite anodes deliver an exceptional sodium storage capacity and remarkable long-life cyclic stability with capacity retention over 76% after 1000 cycles. This work signifies the importance of rational design of electrode materials based on accurate theoretical predictions and sheds light on future development of cost-effective P/C composite anodes for commercially viable SIBs.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
SmartMat
·
2024
·Vol. 5
·期 6
·e1306
·
IF 15.3
Huili Wang,Jianing Qi,Peixin Jiao,Zhonghan Wu,Ziheng Zhang,Na Jiang,Dongjie Shi,Geng Li,Zhenhua Yan,Kai Zhang,Jun Chen
P2-type layered Ni–Mn-based oxides are vital cathode materials for sodium-ion batteries (SIBs) due to their high discharge capacity and working voltage. However, they suffer from the detrimental P2 → O2 phase transition induced by the O 2− −O 2− electrostatic repulsion upon high-voltage charge, which leads to rapid capacity fade. Herein, we construct a P2-type Ni–Mn-based layered oxide cathode with a core-shell structure (labeled as NM–Mg–CS). The P2-Na 0.67 [Ni 0.25 Mn 0.75 ]O 2 (NM) core is enclosed by the robust P2-Na 0.67 [Ni 0.21 Mn 0.71 Mg 0.08 ]O 2 (NM–Mg) shell. The NM–Mg–CS exhibits the phase-transition-free character with mitigated volume change because the confinement effect of shell is conductive to inhibit the irreversible phase transition of the core material. As a result, it drives a high capacity retention of 81% after 1000 cycles at 5 C with an initial capacity of 78 mA h/g. And the full cell with the NM–Mg–CS cathode and hard carbon anode delivers stable capacities over 250 cycles. The successful construction of the core-shell structure in P2-type layered oxides sheds light on the development of high-capacity and long-life cathode materials for SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
ACS Materials Letters
·
2022
·
IF 11.17
Shumin Zheng,Dan Feng,Lekai Xu,Jiang Du,Bao Li,Bao Wang
Electrodes with a high areal capacity are critical for developing high-energy-density sodium-ion batteries (SIBs). The free-standing thick electrode is a promising candidate among the state-of-art electrodes, since it has the advantages of high areal mass, binder-free, current-collector-free, and no carbon additive; thus, the whole mass of the electrode is an active material that can contribute to capacity. However, enhancing areal density by introducing thick electrodes impinges on the transport of charge carriers including ions and electrons. Here we designed and synthesized an ultrathick (1500 μm) free-standing foam, which is a carbon framework with 1T-MoS2 nanosheets embedded in the vertically aligned channel wall. To tune the areal mass and morphology of the as-obtained foam, a confined iterative self-assembly strategy was proposed. The Na+ storage behavior was studied by using the as-obtained foam as a free-standing electrode against Na metal. Consequently, it displays good cycle stability even with a high areal mass of 20.74 mg cm–2 and delivers an astonishing reversible areal capacity of 19.75 mAh cm–2 at 0.01 A g–1, which greatly exceeds that of most sodium storage materials. The proposed confined iterative self-assembly strategy for fabricating thick electrodes opens new avenues for high areal capacity batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Jujun Yuan,Xiaofan Li,Jun Liu,Shiyong Zuo,Xiaokang Li,Fangkun Li,Yunfei Gan,Haishan He,Xijun Xu,Xianke Zhang,Junxia Meng
The distinctive pomegranate-like Nb 2 O 5 /Carbon@ N -doped carbon (Nb 2 O 5 /C@NC) composites are fabricated using hydrothermal method integrated with nitrogen doped carbon coating procedure. For the SIBs anode, the Nb 2 O 5 /C@NC composites present superior rate character and sustainable capacity (117 mAh g −1 upon 1000 cycles at 5 A g −1 ). The in-situ X-ray diffraction (XRD) is utilized to research its sodium storage mechanism. Furthermore, for PIBs, the Nb 2 O 5 /C@NC composites present sustainable capacity (81 mAh g −1 upon 1000 cycles at 1 A g −1 ). The outstanding performance of Nb 2 O 5 /C@NC composites is ascribed to its unique architecture, in which Nb 2 O 5 nanocrystals embedded in porous carbon can restrain agglomeration of Nb 2 O 5 nanocrystals, enhance electron/ion diffusion kinetics , and ensure electrolyte accessibility, and moreover, NC shell layer can provide effective active sites and further increase ions/electrons transfer.
研究领域:
材料科学
·
电化学
·
纳米能源材料
·
储能技术
·
先进电池
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Wenchao Chen,Xin Liu,Jianghai Wu,Qing Wang,Yahui Zhang,Shengxue Yan,Pengqing Hou,Shaohua Luo
Iron sulfide is a potential anode material for sodium-ion batteries because of its abundant natural resources and high theoretical specific capacity. However, they show poor cycling performance due to the serious volume change of iron sulfide materials during the process of charge and discharge. In this work, Fe 1-x S particles are encapsulated in nitrogen-doped 1D carbon fiber material by an electrospinning/high-temperature vulcanization process. The carbon fiber skeleton effectively stabilized the structure of the material; The heteroelement doped carbon improved the electrical conductivity properties and capacitive sodium storage performance. Owing to the unique structure of nitrogen-doped 1D carbon fiber, the material obtains good cycling stability and rate capability. The optimized Fe 1-x S@ nitrogen-doped carbon fibers (Fe 1-x S@NCFs) material was used as the anode of the sodium-ion batteries and maintained a discharge capacity of 382 mAh g -1 after 100 cycles at 0.1 A g -1 and 330 mAh g -1 after 150 cycles at 1 A g -1 .
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2018
·Vol. 61
·期 8
·1057-1066
·
IF 4.318
Huang Zhen-Dong,Zhang Ting-Ting,Lu Hao,Yang Jike,Bai Ling,Chen Yuehua,Yang Xu-Sheng,Liu Rui-Qing,Lin Xiu-Jing,Li Yi,Li Pan,Liu Xianming,Feng Xiao-Miao,Ma Yan-Wen
Durability, rate capability, capacity and tap density are paramount performance metrics for promising anode materials, especially for sodium ion batteries. Herein, a carbon free mesoporous CoTiO 3 micro-prism with a high tap density (1.8 g cm −3 ) is newly developed by using a novel Co-Ti-bimetal organic framework (BMOF) as precursor. It is also interesting to find that the Co-Ti-BMOF derived carbon-free mesoporous CoTiO 3 micro-prisms deliver a superior stable and more powerful Na + storage than other similar reported titania, titanate and their carbon composites. Its achieved capacity retention ratio for 2,000 cycles is up to 90.1% at 5 A g −1 .
研究领域:
材料科学
·
电化学
·
纳米能源
·
储能技术
·
无机功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 13
·5756-5772
·
IF 4.5
Liao Minjian,Zhao Yanyan,Pan Yue,Pan Jing,Yao Qin,Zhang Shuting,Zhao Hui,Hu Yang,Zheng Wenxu,Zhou Wuyi,Dong Xianming
Wound dressings play an important role in the wound healing process. For the shortcomings of traditional wound dressings, hydrogel wound dressing with high strength and high water content is a new ideal wound dressing. In this study, polyvinyl alcohol and sodium alginate were selected as raw materials to form the first layer of network structure by physical cross-linking and chemical cross-linking. Then, the double network structure composite hydrogels were obtained by immersed in tannic acid solution. The microstructure, mechanical properties, water content, swelling ratio, antibacterial properties, adhesion properties and rheology of the hydrogels were subsequently investigated. The obtained double network hydrogels have high mechanical properties due to chemical cross-linking and hydrogen bonding interactions, and the maximum tensile strength can reach 4.06 MPa and the elongation at break is up to 569.12%. The optimized calculations from molecular simulations proved that the strengths of the three different types of hydrogen bonds formed reached 37.70, 54.98 and 60.50 kJ/mol, respectively, also justifying the high mechanical strength of the hydrogels. The hydrogel can form good adhesion on various substrate materials such as wood, plastic, glass and pigskin with maximum adhesion strengths of 200.6, 24.8, 24.4 and 13.1 kPa, respectively. Wood surface has higher adhesion strength due to the presence of large amount of cellulose and hydrogen bonds formed by hydrogel. In conclusion, good adhesion can be formed on the surface of different materials. It was a wound dressing with potential application. Graphical abstract
研究领域:
生物材料
·
组织工程
·
高分子科学
·
创伤修复
·
药物递送
·
表面科学
·
再生医学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 38
·22064-22071
·
IF 12.732
Wenda Zhang,Jie Feng,Fengqi Lu,Alberto J. Fernández-Carrión,Hui Fu,Xiaojun Kuang
Na-doped melilite-type silicate Sr2MgSi2O7 was reported to display high oxide ion conductivity. In this work, through multiple complementary techniques including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, solid-state 29Si and 23Na nuclear magnetic resonance spectroscopy, and DFT calculations of defect formation energies, we found that it is hard to replace Sr with Na in Sr2MgSi2O7, and the Sr2−xNaxMgSi2O7−0.5x compositions formed mixed crystalline Sr2MgSi2O7 and Na-containing glassy phases. AC impedance spectroscopy measurements indicated that the ionic conduction in Sr2−xNaxMgSi2O7−0.5x could be from Na+ ions in the glassy phase, instead of the oxide ions.
研究领域:
材料科学
·
固体离子导体
·
无机非金属材料
·
能源材料
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2017
·
IF 3.671
Ping Shao,Ben Niu,Hangjun Chen,Peilong Sun
Edible packaging films using polymer for food preservation have been developed for a long time. In this study, the effects of different concentrations (0.5%, 1%, 1.5%, w/v) of tea polyphenols incorporated into pullulan-Carboxymethylcellulose sodium (Pul-CMC) solutions on electrospun nanofiber films were evaluated. The fiber size distribution was characterized by scanning electron microscopy. The morphological features of nanofibers were modulated through adjusting process parameters (e.g. concentration of polymer solution, applied voltage and feeding rate). Increasing the applied voltage from 19 to 21 kV and the feed rate from 0.36 to 0.6 mL/h leads to a reduction in mean fiber diameter. Fruit packaging potential was evaluated using strawberry. The pullulan-CMC-TP nanofibers significantly decreased weight loss and maintained the firmness of the strawberries, and improved the quality of the fruit during storage. The findings demonstrate a facile packaging route to improve food sustainability and reduce waste.
研究领域:
食品科学
·
材料科学
·
高分子化学
·
农产品贮藏与加工
·
功能食品
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2020
·
IF 5.88
Gang Tao,Rui Cai,Yejing Wang,Hua Zuo,Huawei He
Hydrogel-based wound dressings are ideal materials as they could provide a moist environment to promote wound healing. Silk sericin is a natural macromolecular protein produced by silkworms and has positive effects on fibroblasts and keratinocytes. Sodium alginate is a natural polysaccharide known as a mouldable matrix. To develop novel hydrogel wound dressings, sodium alginate was functionalized with silk sericin to yield an injectable and mouldable semi-interpenetrating network hydrogel (SA/Se) using calcium ions as the crosslinking agents. Meanwhile, silver nanoparticles (AgNPs) were synthesized in situ by the phenolic hydroxyl group of tyrosine in sericin to enhance the antibacterial activity of the hybrid hydrogel. UV–visible spectroscopy, fluorescence spectroscopy, transmission electron microscope, X-ray photoelectron spectroscopy and energy dispersive spectroscopy demonstrated the successful synthesis of AgNPs with average size of 15.7 nm in SA/Se-Ag0.2. Field emission scanning electron microscopy showed the macroporous structure of the hydrogel. The hybrid hydrogel had a swelling ratio of 32 and more than 5% of retention ratio after 50 h. It exhibited effective antibacterial activity through irreversibly disrupting bacterial membrane structure to result in bacterial lysis and death. Cell counting kit-8 assay suggested the hybrid hydrogel was highly cytocompatible. The animal experiment showed the wound contraction ratio in SA/Se-Ag0.2 group was 99% after 12 days, indicating it can effectively promote wound healing. This novel hydrogel is promising for wound healing and tissue engineering.
研究领域:
生物材料
·
组织工程
·
再生医学
·
创伤修复
·
纳米医学
·
生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）