Nanomaterials
·
2024
·Vol. 14
·期 13
·1118
·
IF 4.4
Na Guo,Lili Liu,Guilong Cao,Shurui Xing,Jingying Liang,Jianjun Chen,Zuojun Tan,Yuequn Shang,Hongwei Lei
Lead-free Cs3Cu2I5metal halides have garnered significant attention recently due to their non-toxic properties and deep-blue emission. However, their relatively low photoluminescence quantum efficiency and poor stability have limited their applications. In this work, sodium iodide (NaI) is used to facilitate the synthesis of Cs3Cu2I5nanocrystals (NCs), demonstrating improved photoluminescence intensity, photoluminescence quantum yield, and stability. Systematic optoelectronic characterizations confirm that Na+is successfully incorporated into the Cs3Cu2I5lattice without altering its crystal structure. The improved Photoluminescence Quantum Yield (PLQY) and stability are attributed to the strengthened chemical bonding, which effectively suppresses vacancy defects in the lattice. Additionally, light-emitting diodes (LEDs) based on 10% NaI-doped Cs3Cu2I5NCs were assembled, emitting vibrant blue light with a maximum radiant intensity of 82 lux and Commission Internationale de l’Eclairage (CIE) chromaticity coordinates of (0.15, 0.1). This work opens new possibilities for commercial lighting display applications.
研究领域:
材料科学
·
光电技术
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Storage Materials
·
2019
·
IF 0
Bingcheng Ge,Yangyang Wang,Yong Sun,Yunping Li,Jianyu Huang,Qiuming Peng
Developing a rechargeable metal-nitrogen battery is desirable for energy conversion and nitrogen fixation as well as an alternative route for a potential and mild ammonia synthesis . Herein, we realized a proof-of-concept for sodium-nitrogen (Na-N 2 ) rechargeable batteries by introducing the alpha-MnO 2 (α-MnO 2 ) nanowire as a catalyst. In addition, we have also demonstrated a reversible reaction of 6Na + N 2. ↔ 2Na 3 N. This system reveals an outstanding reversible capacity of 600 mAh g −1 at 50 mAg −1 , runs ∼80 cycles with a controlled capacity of 400 mAh g −1 at discharge terminal voltage below 1.6 V and achieves a high actual specific energy density based on total active materials (about 4900 Wh/Kg MnO2 ) at the current density of 100 mAg −1 . In addition, a good efficiency of nitrogen fixation (∼26%) has been achieved. These attractive performances are mainly associated with the distinctive channel structure, high conductivity, and outstanding catalytic activity in terms of in-situ environmental transmission electron microscopy investigations. The success of Na-N 2 batteries not only provides an alternative strategy for the next-generation of electrochemical energy-storage devices, but also builds a new trajectory toward green recycling and utilization of N 2 .
研究领域:
能源化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
Journal of Energy Chemistry
·
2022
·
IF 13.599
Fang Tang,Rongqing Xia,Dong Chen,Yu Yao,Lin Liu,Yuezhan Feng,Xianhong Rui,Yan Yu
Sodium metal battery (SMB) is regarded as a promising candidate for next-generation high-energy battery due to high theoretical capacity and abundant natural resources. However, the growth of sodium dendrites and large volume expansion during the processes of sodium plating and stripping seriously restrict the practical application of SMBs. Here, a three-dimensional skeleton of aluminum nanosheet arrays (Al NSARs) is constructed by a facile etching approach to achieve rapid and reversible Na plating/stripping. The Al NSARs with large geometric specific surface and plentiful cavities can provide rich active nucleation sites, reduce local current density and accommodate Na volume change, which lead to uniform deposition of sodium with dendrite-free morphology. As a result, Na plating/stripping on Al NSARs can stably operate over 650 cycles at 2 mA cm −2 /2 mAh cm −2 with average Coulombic efficiency (CE) of 100.0% and low potential polarization of 27 mV. Moreover, the full cell of Na 3 V 2 (PO 4 ) 3 ‖Al NSARs@Na can run for over 1800 cycles at a high rate of 20C. These superior properties, combined with relatively low cost and weight of Al, enable our Al NSARs to be great prospect for practical applications.
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 ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 3
·030519
·
IF 3.9
Yi Shuai,Yilong Hu,Jin Lou,Xiongwei Gong,Mingxi Li,Zhixin Xu,Duoduo Deng,Fenglin Jiang,Ming Li
Sodium metal batteries have attracted extensive attention because of the high availability and energy density of Na; however, the practical application of these batteries is significantly plagued by dendritic growth. Aluminum metal has a unique advantage as a current collector for sodium metal anodes because of its low density and low cost. However, problems with dense aluminum oxide mean its application in sodium metal anodes has seldom been studied. In this study, aluminum foam was fluorinated by a facile method and compounded with sodium metal at high temperatures to prepare a sodiophilic aluminum foam@sodium electrode (NaHFAl). Because of the sodiophilic surface, NaHFAl achieves a non-dendritic deposition morphology and markedly reduced voltage hysteresis in symmetric cells for over 2200 h. The NaHFAl/carbonate electrolyte/sulfurized polyacrylonitrile (SPAN) cell exhibited excellent cycle performance, with a capacity retention of 68% after 800 cycles. Our work provides an easily scalable and cost-effective approach for the development of high-performance sodium metal anodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ke Wang,Pengfei Zhao,Ting Zhou,Yanjun Wu,Tianyu Wang,Paul S. Fennell,Edward J. Anthony
CO 2 capture and utilization to produce value-added fuels and chemicals offers a promising avenue to assist in the mitigation of the global warming crisis. However, there are economic challenges for the regeneration of some sorbents used in CO 2 capture, owing to sorbent sintering and high energy requirements, while direct conversion processes are hindered by the lack of cost-effective, efficient, selective, and stable catalysts. We demonstrate the use of sodium zirconate-looping (NaL) with the reverse-Boudouard (RB) reaction enabling high-temperature CO 2 capture and in-situ CO 2 conversion operating in a single isothermal reactor operating at 800 °C. While employing a mild combustion synthesis method, the dual-function material Na 2 ZrO 3 exhibited a high and stable CO 2 uptake capacity of 4.9 mmol CO 2 /g without the use of Ni catalysts. This is due to its fine particle size, macroporous structure, and well-dispersed ZrO 2 stabilizer within the Na 2 O matrix. The resulting Na 2 CO 3 -ZrO 2 and regenerated Na 2 ZrO 3 phases (as synergistic self-catalysts) mixed with renewable and cost-effective biochar (as a reductant) facilitated exceptional in-situ CO 2 conversion efficiency (~90 %), as well as high CO selectivity (approaching 100 %), and relative stability (~80 %) even after multiple cycles. Importantly, theoretical calculations aligned with mechanistic studies revealed that the activation energy barriers at two specific oxygen sites for the monatomic C-assisted CO 2 dissociation/gasification were lower than the desorption energy of CO 2 on the Na 2 ZrO 3 (101) surface, demonstrating the self-catalytic mechanism. Thus, this cost-effective and energy-efficient strategy provides a compelling prospect to make local emissions from large stationary sources CO 2 neutral without requiring carbon sequestration.
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 8
·2004
·
IF 5.076
Junjiao Li,Jun Xie,Dongchen Li,Lei Yu,Chaowei Xu,Senlin Yan,Yuzheng Lu
Interface engineering can be used to tune the properties of heterostructure materials at an atomic level, yielding exceptional final physical properties. In this work, we synthesized a heterostructure of a p-type semiconductor (NiO) and an n-type semiconductor (CeO2) for solid oxide fuel cell electrolytes. The CeO2-NiO heterostructure exhibited high ionic conductivity of 0.2 S cm−1at 530 °C, which was further improved to 0.29 S cm−1by the introduction of Na+ions. When it was applied in the fuel cell, an excellent power density of 571 mW cm−1was obtained, indicating that the CeO2-NiO heterostructure can provide favorable electrolyte functionality. The prepared CeO2-NiO heterostructures possessed both proton and oxygen ionic conductivities, with oxygen ionic conductivity dominating the fuel cell reaction. Further investigations in terms of electrical conductivity and electrode polarization, a proton and oxygen ionic co-conducting mechanism, and a mechanism for blocking electron transport showed that the reconstruction of the energy band at the interfaces was responsible for the enhanced ionic conductivity and cell power output. This work presents a new methodology and scientific understanding of semiconductor-based heterostructures for advanced ceramic fuel cells.
研究领域:
材料科学
·
能源技术
·
电化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Jun Cong,Shao-hua Luo,Pengyu Li,Kun Li,Pengwei Li,Shengxue Yan,Lixiong Qian,Xin Liu
Na3V2(PO4)3 has been attracting great interest from scholars owing to its high voltage platform and high energy storage capacity. However, its poor electronic conductivity and weak ion diffusion ability seriously restrict the application of its actual industrialization. In view of the above defects, Na3+xV2(PO4)3/C (x = 0, 0.2, 0.4, 0.6) cathode materials for sodium-ion batteries (SIBs) are prepared through a solid-phase method in this paper. The X-ray diffraction (XRD) results show that the Na-rich amount of x = 0.4 attains the upper limit of the solid solution of the Na-rich Na3V2(PO4)3, and the “ultracapacity” effect reaches the maximum at this x value; the capacity is as high as 132.4 mAh/g, with remarkable cycle stability (96% capacity retention after 300 cycles). The results of density functional theory (DFT) calculations clearly explain that the reason for the excess sodium occupying the electrochemically active Na2 site is the reason for the ultracapacity. It is found through the electron paramagnetic resonance (EPR) test that excessive sodium caused some high-valent V to be reduced to low-valent V, which maintained the electrical balance of the crystal and the stability of the Na-rich solid solution structure. Through the X-ray absorption near edge structure (XANES) of the V element, it is found that the change of V valence during the charge and discharge process of the Na-rich Na3V2(PO4)3 solid solution is consistent with that of Na3V2(PO4)3. Refined structural characterization by spherical aberration electron microscopy and ex situ XRD also prove that the Na-rich Na3V2(PO4)3 solid solution undergoes a phase transition during the charge–discharge process and can be reversibly recovered. These findings further prove that it is feasible to synthesize a new Na-rich Na3V2(PO4)3 solid solution with a stable structure, which makes Na3V2(PO4)3 a practical cathode material for SIBs having great potential in the future.
研究领域:
材料科学
·
电化学
·
储能技术
·
电池技术
·
固态化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiarong He,Tao Tao,Fan Yang,Zhipeng Sun
Sodium-ion batteries (SIBs) are prospective and fascinating for stationary energy storage systems (ESS) because of the abudance of sodium (Na) resource and their excellent cycle stability. Exploring for advanced anode materials with robust framework and appropriate crystallographic sites, is of great significance to effectively boost the practical applications of SIBs and to largely decrease the potential safety issues of alloy-type anodes with large volume changes during cycling. Herein, two hydrated vanadium phosphates [K 3 V 3 (PO 4 ) 4 ·H 2 O, KVP] are delicately prepared by freeze-drying and sol–gel heating drying, denoted as KVP-FD and KVP-HD, respectively, and used as novel anodes for SIBs to reveal their Na + intercalation mechanism. KVP-HD electrode possesses a much superior discharge capacity and a higher capacity retention (185.6 mAh g −1 , 72.2 %) at 1C for 300 cycles, and more excellent rate capability at high C-rates (greater than1C) than KVP-FD (127.4 mAh g −1 , 45.5 %). Cyclic voltammetry, galvanostatic intermittent titration and electrochemical impedance spectroscopy, manifest a more alleviated polarization, smaller impedance and faster diffusion kinetics of KVP-HD electrode than KVP-FD. Exsitu -X-ray diffraction ( exsitu -XRD) further reveals that polyanionic KVP-HD material possesses a robust structure and provides fast ion diffusion tunnels to reversibly (de)intercalate the Na + /K + due to the pillar K + residing and holding the structure. The electrochemical mechanism switch successively from an initial predominant K + to a subsequent mixed Na + /K + (de)intercalation in the polyanionic KVP during cycling. This work innovatively lights up the future to use Na-free KVP polyanion as robust framework for advanced anode in SIBs, which gives insightful reference for using Na-free materials for next-generation SIBs anodes towards a much safer and a more cost-effective battery system.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy and Sustainability Research
·
2021
·Vol. 2
·期 6
·2000095
·
IF 0
Jun Pan,Nana Wang,Dan Lv,Wujie Dong,Jian Yang,Fuqiang Huang
Sodium-ion batteries (SIBs), as next-generation energy storage devices, can be made by a similar production process to lithium-ion batteries (LIBs). The key to accelerating their commercialization is to discover appropriate high-performance electrode materials with low cost, nontoxicity, and simple synthetic features. Herein, layered-structure Na 2 Ti 3 O 7 , with the advantages of appropriate charge/discharge plateaus, superior stability, environmental friendliness, and ease of preparation using cheap raw materials, is selected for assembly in full-cell battery packs to evaluate its suitability for practical application. When evaluated in a coin cell, it has a capacity of 77.2 mAh g −1 at 1 A g −1 after 10 000 cycles with capacity retention of 99.9%, demonstrating its excellent stability. In the case of a soft-pack battery, it retains 22.3 mAh g −1 at 0.1 A g −1 and 18.1 mAh g −1 at 0.05 A g −1 after 50 cycles. After cycling, there is no sodium dendrite formation or active material shedding, further confirming its safety in practical application. Therefore, Na 2 Ti 3 O 7 as another intercalation/deintercalation mechanism material has application potential in the future.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
Soft Matter
·
2017
·Vol. 14
·期 4
·499-507
·
IF 3.889
Zhaolan Zhai,Xinyan Yan,Zhanqian Song,Shibin Shang,Xiaoping Rao
A novel bio-based anionic surfactant containing a large rigid group and a flexible alkyl chain, namely, sodium N-dodecyl-maleimidepimaric carboxylate (C12-MPA-Na), was synthesized from rosin. The molecular structure of C12-MPA-Na was identified using 1H NMR, FT-IR spectroscopy and MS. Despite containing 36 carbon atoms, C12-MPA-Na showed good water solubility at room temperature. Large spherical aggregates with diameters of 100–200 nm were formed by C12-MPA-Na when its concentration was above 0.1 mM, which was slightly higher than the critical micelle concentration (0.078 mM). Annular wormlike micelles were discovered with increasing C12-MPA-Na concentration, and began to change into extremely long threadlike wormlike micelles when the C12-MPA-Na concentration reached approximately 58 mM. The viscoelastic properties of the wormlike micelle solutions were investigated using steady state and oscillatory shear sweep rheological measurements. The zero-shear viscosity (η0) strongly depended on the concentration of C12-MPA-Na, and the scaling exponent was 34.1. Cryo-TEM confirmed the formation of large spherical aggregates and wormlike micelles. 1H–1H 2D nuclear Overhauser effect spectroscopy (NOESY) was used to detect the molecular interactions of C12-MPA-Na. The results indicated that the alkyl chain of C12-MPA-Na was partially overlapped with its non-planar rigid structure in aqueous solution, and the possible aggregation process for C12-MPA-Na was proposed.
研究领域:
化学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jingwei Wang,Guohua Chen,Shenhua Song
A sodium-ion conducting poly(vinyl alcohol)-based gel polymer electrolyte membrane is developed by plasticizing with an ionic liquid , for the fabrication of electric double-layer capacitors. Sodium triflate is selected as the sodium salt. 1-Ethyl-3 methylimidazoliumtrifluoromethanesulfonate is employed as the plasticizer . The properties of the electrolyte membranes are analyzed in terms of their crystallinity , morphology, thermal stability, electrochemical stability window, ionic transference number, and ionic conductivity . The composition with poly(vinyl alcohol) - 30% sodium triflate + 10% 1-ethyl-3 methylimidazoliumtrifluoromethanesulfonate shows the optimal performances such as good thermal stability up to 150 °C and wide electrochemical stability window of 4.70 V. It is thus employed in the fabrication of electric double-layer capacitors, serving as both ion-conducting electrolyte and separator. The capacitor shows almost 100% coulombic efficiency and stable charge-discharge cyclic property with almost 100% capacity retention after 1000 cycles, when charging up to 1.6 V and 2.0 V with a specific capacitance of 103.7 and 127.8 F g −1 , respectively. It compares well with that made of a liquid electrolyte . This excellent performance is attributed to the sodium triflate with large-sized anions and thus high ionic conductivity (3.8 × 10 −3 S cm −1 ) of the electrolyte membrane.
研究领域:
电化学
·
材料科学
·
能源存储
·
高分子科学
·
纳米科技
·
功能材料
✓ 已验证
DOI
高影响因子
CHEMICAL COMMUNICATIONS
·
2015
·Vol. 51
·期 15
·3227-3230
·
IF 6.834
Maowen Xu,Jun-Ke Hou,Yu-Bin Niu,Guan-Nan Li,Yu-Tao Li,Chang Ming Li
Na2.65Ti3.35Fe0.65O9 rods were prepared by a simple solid-state route and coated with carbon to enhance their electronic conductivity. For the first time, Na2.65Ti3.35Fe0.65O9 was explored as an anode material for Na-ion batteries to deliver a discharge capacity of 137.5 mA h g−1 at a current rate of 40 mA g−1. The charge/discharge capacity of a carbon-coated sample increased by 46.3% to achieve 201.1 mA h g−1.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）