JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Qin-Chao Wang,Zhaoquan Peng,Sha He,Hao Chen,Jinglong Du,Huilin Zang,Xiaoge Li,Xiuqin Zhan,Jie Han
Sodium superionic conductor NaTi 2 (PO 4 ) 3 has attracted significant interest as an anode material for sodium-ion batteries (SIBs). However, its practical application is hindered by its low inherent electrical conductivity, particularly at low temperatures. In this study, oxygen vacancies (V O ) were introduced into NaTi 2 (PO 4 ) 3 nanoribbons to enhance sodium storage performance at low temperatures. X-ray diffraction with Rietveld refinement, electron paramagnetic resonance, and X-ray photoelectron spectroscopy confirm that NaTi 2 (PO 4 ) 3 -2 nanoribbons (NTP-2) exhibit the richest V O concentration. These V O , which bridge TiO 6 octahedra and PO 4 tetrahedra, significantly enhance the antibonding interactions of Ti1–O2 and P1–O1 bonds, while stabilizing the bonding in NaTi 2 (PO 4 ) 3 . The energy barrier for Na + migration is reduced to 0.40 eV involving the V O . The optimized NTP-2 anode demonstrates superior low-temperature performance, maintaining a capacity of 106.1 mAh g −1 (about 96.1 % of its initial capacity) at −20 °C after 300 cycles. Additionally, the NTP-2 anode exhibits a moderate Na + diffusion coefficient of 1.47 × 10 –11 cm 2 s −1 at −20 °C. Furthermore, the Na 3 V 2 (PO 4 ) 3 //NTP-2 full cell retains a capacity of 64 mAh g −1 at −20 °C after 250 cycles, highlighting its potential for low-temperature applications. By integrating oxygen vacancies and nanoengineering, both electronic and ionic conductivities are significantly enhanced in NaTi 2 (PO 4 ) 3 , positioning promising applications for SIBs in low-temperature environments.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Yunqin Yang,QiuMing Liang,Tianwei Lei,Huan He,Tianquan Liang
The capacity of Co-free Li-rich Mn-based layered oxide decreases rapidly due to the irreversible lattice oxygen lose and the crystal structure change. The sodium modified cathode materials are synthesized via the sol–gel method and the electrochemical properties are investigated. Specifically, the first discharge capacity of Li 1.18 Na 0.02 Mn 0.54 Ni 0.26 O 2 is 150.5 mAh·g −1 at 2C, demonstrating a capacity preservation rate of 94.1 % after 100 cycles. And the diffusion coefficient of Li 1.18 Na 0.02 Mn 0.54 Ni 0.26 O 2 is 1.2152 × 10 -15 , which is better than 1.3798 × 10 -16 of the undoped material. This work demonstrates that appropriate Na + doping can stabilize the crystal structure, increase the lithium layer spacing and reduce the irrevocable escape of lattice oxygen within material.
研究领域:
材料科学
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电化学
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DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2024
·
IF 2.8
Yitong Sun,Danyang Zhang,Guozhu Ren,Shihong Zhou,Long Tian,Liang Zhou
Hydrothermal method is a common way to synthesize carbon quantum dots (CQDs), but perplexing by-products are non-negligible shortcoming. The small molecules associated with CQDs synthesis have drawn more attentions because of their luminescent property. In this work, Na-doped CQDs with excellent photoluminescent property as well as small molecules 4,4′-diaminoazobenzene with photochromism characteristic were prepared based on p -phenylenediamine and sodium hydroxide via one-step solvothermal method. The photoluminescence of as-synthesized Na-doped CQDs is tremendously influenced by H + ions, and CQDs-O - Na + structure existing in Na-doped CQDs was verified. At the same time, photochromism which was owing to by-product 4,4′-diaminoazobenzene with photochromic was observed and investigated. The absorption spectrum of 4,4′-diaminoazobenzene overlaps markedly with the photoluminescence spectrum of Na-doped CQDs and thus result in fluorescence internal filtering effect, by which the fluorescence causes interesting photochromism phenomenon. Furthermore, compared with conventional synthetic route of 4,4′-diaminoazobenzene, this method has the advantages of simplicity and metal-free.
研究领域:
材料科学
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化学
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 27
·期 62
·15479-15483
·
IF 5.236
Jingfang F. Zhou,Rukang K. Li
Graphical LiNaTiTa 2 P 2 O 13 displays an open framework comprised of staggered [Ti 1/3 Ta 2/3 O 3 ] ∞ layers and PO 4 tetrahedra with a herringbone-like stacking pattern, similar to monophosphate niobium bronzes. The existence of pentagonal tunnels, hosting the Li + and Na + ions, endow LiNaTiTa 2 P 2 O 13 a moderate ion transport capability (4.67×10 −4 S/cm at 823 K). In addition, the layers constituted by corner-sharing TiO6 and TaO6 octahedra endow a possibility as being photo-catalyst. The successful substitution of Nb for Ta results in the optical absorption red-shifted towards visible range with a narrowing band gap comparable to that of TiO 2 (3.2 eV). Herein, we report a detailed structural, electric, thermal and optical analysis of a titanium and tantalum phosphate LiNaTiTa 2 P 2 O 13 . The title compound is comprised of typical ReO 3 -type layers constituted by corner-sharing TiO 6 and TaO 6 octahedra, bridged by PO 4 tetrahedra, and the structure is closely related to monophosphate niobium bronzes. The existence of pentagonal tunnels, hosting the Li + and Na + ions, endows LiNaTiTa 2 P 2 O 13 a moderate ion transportation behavior (4.67×10 −4 S/cm at 823 K). In addition, the successful substitution of Nb for Ta in LiNaTiTa 2 P 2 O 13 results in the optical absorption red-shift towards visible range with a narrowing band gap, which may provide a route of isomorphic replacement to band engineering for photo-catalysis.
研究领域:
材料科学
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电化学
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光学
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DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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2024
·Vol. 121
·期 5
·e2316914121
·
IF 9.4
Xunzhu Zhou,Yaohui Huang,Bo Wen,Zhuo Yang,Zhiqiang Hao,Lin Li,Shu-Lei Chou,Fujun Li
High-performance sodium storage at low temperature is urgent with the increasingly stringent demand for energy storage systems. However, the aggravated capacity loss is induced by the sluggish interfacial kinetics, which originates from the interfacial Na+ desolvation. Herein, all-fluorinated anions with ultrahigh electron donicity, trifluoroacetate (TFA−), are introduced into the diglyme (G2)-based electrolyte for the anion-reinforced solvates in a wide temperature range. The unique solvation structure with TFA− anions and decreased G2 molecules occupying the inner sheath accelerates desolvation of Na+ to exhibit decreased desolvation energy from 4.16 to 3.49 kJ mol−1 and 24.74 to 16.55 kJ mol−1 beyond and below −20 °C, respectively, compared with that in 1.0 M NaPF6-G2. These enable the cell of Na||Na3V2(PO4)3 to deliver 60.2% of its room-temperature capacity and high capacity retention of 99.2% after 100 cycles at −40 °C. This work highlights regulation of solvation chemistry for highly stable sodium-ion batteries at low temperature.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Energy Material Advances
·
2022
·
IF 0
Qiangqiang Zhang,Xing Shen,Quan Zhou,Kaixuan Li,Feixiang Ding,Yaxiang Lu,Junmei Zhao,Liquan Chen,Yong-Sheng Hu
Na-ion batteries (NIBs) have received significant interest as potential candidates for large-scale energy storage owing to the widespread distribution of sodium and superior low-temperature performance. However, their commercial application is usually hindered by the high production cost and inadequate performance for electrode materials, particularly for cathodes. Na3(VOPO4)2F (NVOPF) has been recognized as one of the most promising cathodes for high-energy NIBs owing to the high working voltage and energy density. Here, we report a facile highly efficient room-temperature solution protocol for large-scale synthesis of NVOPF cathode for NIBs. By simply regulating pH, NVOPF can be obtained, which delivered a discharge capacity of 120.2 mAh g-1 at 0.1 C and 72% capacity retention over 8000 cycles at 25 C. Besides, the kilogram-level NVOPF products have been synthesized, and 26650 cylindrical cells were fabricated, which exhibit excellent cycling stabilities, remarkable low-temperature performance with comparable safety features. We hope our findings could provide insights on the industrial application of NVOPF in NIBs.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Qiuju Xu,Heng Liu,Wenyan Du,Renming Zhan,Linyu Hu,Shujuan Bao,Chunlong Dai,Feng Liu,Maowen Xu
The low Se loading, volumetric expansion and polyselenide shuttling between cathode and anode are major factors to limit the further development of Na-Se batteries . To overcome above issues, metal-organic complex derived hierarchical porous carbon (HPC) was synthesized as host matrix for Se via a facile synthesis combined with annealing treatment. The unique hollow structure holds numerous micropores and mesopores for Se loading to form Se-HPC composite. The Se-HPC electrode shows outstanding rate capabilities of 330 and 260 mA h g -1 at 1 C and 5 C, respectively. It also exhibits a stable cycling performance for 1000 cycles at 2 C with a small capacity decay rate of 0.04% per cycle. Such good performance demonstrates the viability of Na-Se batteries with high Se loading of 56%, which may be attributed to the unique hollow structure of HPC with Se encapsulated within micropores and mesopores. This attractive structure not only promotes electrolyte infiltration and electron transfer but also provides additional buffer space to buffer volumetric expansion of Se and suppress polyselenides dissolution in carbonate electrolyte during cycling.
研究领域:
储能
·
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2026
·
IF 8.8
Wang Ziyan,Zhou Meng,Zhang Rongzheng,Zou Yuening,Zhang Sikai,An Wen,Hu Hai,Huang Zhifeng,Ye Zhongqiang,Liu Li
The Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 /C composite (NFPP-E) featuring a highly graphitized N- and P-co-doped carbon coating and hierarchical pore structure was successfully synthesized using a facile ball-milling-calcination approach. Ethylenediamine tetra(methylene phosphonic acid) (EDTMPA) acts as a multifunctional precursor and concurrently serves as a chelating, phosphorus, carbon, nitrogen, and pore-forming agent. The unique “phosphorus-catalyzed graphitization” effect during EDTMPA pyrolysis plays a pivotal role; the released active phosphorus oxides facilitate the ordered transformation of the carbon matrix, thereby yielding a highly graphitized N- and P-co-doped carbon coating with a low defect density. Electrochemical measurements demonstrated significant performance enhancements of NFPP-E relative to the sample prepared with conventional NH 4 H 2 PO 4 . Specifically, NFPP-E delivered a high reversible capacity of 103.09 mAh·g −1 at 0.1 C (1 C = 129 mA·g −1 ) and retained 77.41 mAh·g −1 even at an elevated rate of 10 C, demonstrating excellent rate capability. Furthermore, it exhibited superior long-term cycling stability, with a capacity retention rate of 94.9% after 500 cycles at 1 C. When assembled into a full cell with hard carbon as the anode, the NFPP-E achieved a capacity retention rate of 92.74% over 200 cycles, highlighting its great potential for practical applications. This study not only uncovers the universal principle for regulating the structure and properties of carbon layers via the “phosphorus-catalyzed graphitization” mechanism using organic phosphonic acid precursors but also offers a novel strategy for the development of high-performance and low-cost cathode materials for sodium-ion batteries.
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
J.C. Xi,Y.F. Yuan,G.C. Cai,B.X. Wang,Y.Z. Huang,S.Y. Guo,P.F. Du
As a novel anode material for sodium-ion batteries, ultrafine Ni 0.85 Se nanoparticles encapsulated inside hollow porous carbon spheres (HPCS@Ni 0.85 Se) are prepared by impregnating Ni(NO 3 ) 2 into HPCSs, calcination and selenization, which is based on the strong capillary effect of HPCSs. Material characterization reveals that Ni 0.85 Se nanoparticles with a diameter of 5–15 nm are evenly dispersed and intimately coupled to the internal wall of HPCSs, and the content of Ni 0.85 Se reaches 52.81%. HPCSs as unique reactors and Ni 0.85 Se carriers improve electronic conductivity of Ni 0.85 Se, facilitate electrolyte penetration and storage, buffer volume variation of Ni 0.85 Se, effectively confine Ni 0.85 Se during long-term cycles. Consequently, HPCS@Ni 0.85 Se exhibits excellent cycling durability and extraordinary rate capability. High reversible capacities of 341 mA h g −1 at 1 A g −1 after 1000 cycles, 280 mA h g −1 at 5 A g −1 after 2000 cycles and 305 mA h g −1 at 10 A g −1 after 540 cycles are achieved. The reaction kinetics and Na + storage mechanism are further analyzed by galvanostatic intermittent titration technique, cyclic voltammetry and electrochemical impedance spectra measurements. Ex-situ characterizations confirm outstanding structural stability of HPCS@Ni 0.85 Se. It is demonstrated that HPCS@Ni 0.85 Se is an excellent anode material, and this unique HPCS-based nanoencapsulation structure is an effective composite strategy for transition metal selenides .
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2015
·
IF 2.353
Renping Cao,Dedong Peng,Haidong Xu,Shenhua Jiang,Ting Fu,Wenjie Luo,Zhiyang Luo
A series of Sr 3 (VO 4 ) 2 :Sm 3+ ,P 5+ ,Na + phosphors are synthesized by using solid-state reaction method in air. The strongest emission band peaking at ∼600 nm is assigned to the 4 G 5/2 → 6 H 7/2 transition of Sm 3+ ion, and the strong excitation peak at ∼402 nm due to 6 H 5/2 → 4 F 7/2 transition indicates that these phosphors can be excited by near ultraviolet light emitting diode chip. Energy transfer (ET) between VO 4 3− group and Sm 3+ ion can be observed. Sr 3 (VO 4 ) 2 :Sm 3+ phosphor with excitation 320 nm exhibits a systematically varied hues from green to yellow by changing Sm 3+ ion concentration from 0 to 6 mol%. The luminous mechanism of Sr 3 (VO 4 ) 2 :Sm 3+ phosphor is explained by using the energy level diagrams of VO 4 3− group and Sm 3+ ion. The luminescence properties of Sr 3 (VO 4 ) 2 :Sm 3+ phosphor can be improved and tuned by codoping the P 5+ and Na + ions due to ET and charge compensation. Lifetimes of Sr 2.925 Sm 0.05 (VO 4 ) 2 , Sr 2.925 Sm 0.05 (V 0.9 P 0.1 O 4 ) 2 , and Sr 2.9 Na 0.05 Sm 0.05 (V 0.9 P 0.1 O 4 ) 2 phosphors are 1.208, 1.219, and 0.796 ms, respectively. The experiment results are helpful to adjust the luminescence properties of Sm 3+ -doped other phosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jiachen Li,Jun Pu,Ziqiang Liu,Jian Wang,Wenlu Wu,Huigang Zhang,Haixia Ma
The energy and power densities of rechargeable batteries urgently need to be increased to meet the ever-increasing demands of consumer electronics and electric vehicles. Alloy anodes are among the most promising candidates for next-generation high-capacity battery materials. However, the high capacities of alloy anodes usually suffer from some serious difficulties related to the volume changes of active materials. Porous supports and nanostructured alloy materials have been explored to address these issues. However, these approaches seemingly increase the active material-based properties and actually decrease the electrode-based capacity because of the oversized pores and heavy mass of mechanical supports. In this study, we developed an ultralight porous nickel to scaffold with high-capacity SnSb alloy anodes. The porous-nickel-supported SnSb alloy demonstrates a high specific capacity and good cyclability for both Li-ion and Na-ion batteries. Its capacity retains 580 mA h g–1 at 2 A g–1 after 100 cycles in Li-ion batteries. For a Na-ion battery, the composite electrode can even deliver a capacity of 275 mA h g–1 at 1 A g–1 after 1000 cycles. This study demonstrates that combining the scaffolding function of ultralight porous nickel and the high capacity of the SnSb alloy can significantly enhance the electrochemical performances of Li/Na-ion batteries.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2017
·Vol. 1
·期 12
·2656-2663
·
IF 0
Chen Wu,Yuehua Wei,Qingwang Lian,Chao Cui,Weifeng Wei,Libao Chen,Chengchao Li
Enhancing the conductivity of electrode materials is critically important for improving the high-rate performance of Na-ion batteries (NIBs). Herein, we report a multifaceted strategy for optimizing the conductivity and electrochemical properties of nickel cobalt selenides via the combination of fine component regulation and C coating. The electrical conductivity of C@Ni0.33Co0.67Se2/C nanofiber (CNF) (Co0.67) hybrids achieved in this study was 0.3733 S mm−1, a conductivity five-fold higher than that of selenides with a Ni/Co ratio of 2 : 1. Coupled with desirable three-dimensional (3D) nanobrush morphology and the 1D conducting path of CNFs, the Co0.67 electrode achieved a superior rate performance of 413.1 mA h g−1, even at 2 A g−1. Furthermore, the Co0.67 electrode exhibited an impressive cycling performance of 499 mA h g−1 after 100 cycles (exhibiting an 89.5% capacity retention of the second cycle). Finally, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry analysis at different sweep rates were conducted to demonstrate the Co0.67 electrode's fast charge/ion transport ability and increased electrode kinetics.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）