JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 6
·4303-4307
·
IF 1.339
Zhang Yupeng,Wu Jian,Zhang Ying,Guo Wenbin,Ruan Shenping
Na2Ti3O7 nanotubes was synthesized by a hydrothermal method, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Then the material was coated on Al2O3 ceramic
substrate to fabricate humidity sensors using Ag–Pd as interdigitated electrodes. The sensor shows high humidity sensitivity and quick response-recovery time. The impedance changes about five orders of magnitude within humidity range from 11% to 95% relative humidity (RH). At the frequency
of 100 Hz, the response time is 2 s and recovery time is 4 s, and the maximum hysteresis is less than 3% RH. Moreover, complex impedance property at different RH was investigated to study sensing mechanism. The results indicate the potential applications of Na2Ti3O7
nanotubes for fabricating high-performance humidity sensors.
研究领域:
材料科学
·
传感器技术
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DOI
PubMed
高影响因子
IONICS
·
2018
·Vol. 25
·期 5
·2211-2219
·
IF 2.347
Chen Si,Gao Lin,Zhang Lulu,Yang Xuelin
Four types of mesoporous Na 2 Ti 3 O 7 (NTO) microspheres have been successfully prepared utilizing different concentrations of NaOH treatment. The specific surface areas and pore size distributions of NTO can be well controlled by means of adjusting the amount of NaOH additives. In the meanwhile, the corresponding electrochemical performance has been detected and analyzed. It is concluded that the 3 M-NTO sample prepared with 3 M NaOH solution exhibits the best electrochemical performance. We consider that the less or excess amount of NaOH might not be beneficial to building the most optimal model for efficient Na + ion storage. The addition of NaOH less than 2 M leads to the relatively low surface areas and pore volume, bringing about limited contact areas between active materials and Na + ions as well as unsatisfied specific capacity. On the other hand, the excess augment of NaOH is reversely detrimental to the improvement of electrochemical performance probably owing to the fragile construction of NTO caused by the abundant mesopore distribution.
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
ChemElectroChem
·
2018
·Vol. 5
·期 22
·3498-3505
·
IF 4.446
Su Nie,Li Liu,Min Li,Junfang Liu,Jing Xia,Yue Zhang,Xianyou Wang
Graphical The unique structure of these one-dimensional nanofibers with two-dimensional nanosheets on the surface is successfully synthesized. Large specific surface area can greatly shorten the diffusion routes for both electrons and ions. Besides, the carbon matrix can dramatically improve the overall conductivity. As a result, the anode exhibits excellent electrochemical capability for sodium-ion batteries. Na 2 Ti 3 O 7 /C nanofibers are successfully synthesized through an electrospinning process followed by hydrothermal treatment. The unique structure of these one-dimensional nanofibers with two-dimensional nanosheets on the surface is presumed to significantly shorten the diffusion routes for both electrons and ions. Meanwhile, the carbon matrix with a certain degree of graphitization can dramatically improve the overall conductivity. As a result, the Na 2 Ti 3 O 7 /C nanofiber electrode reveals an impressive electrochemical capability as the anode material of sodium-ion batteries. It demonstrates a reversible capacity of 110 mA h g −1 after 500 cycles at a rate of 1 C. Moreover, with almost no capacity degradation, the discharge capacity of the Na 2 Ti 3 O 7 /C nanofiber electrode remains at 58 mA h g −1 after 1500 cycles at the high rate of 50 C. This superior electrochemical performance places the Na 2 Ti 3 O 7 /C nanofibers as an anode material with great promise for sodium-ion batteries that could be applied in large-scale energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Mingcheng Li,Jingyu Zhao,Yaru Li,Meichen Li,Yongchuan Wu,Chun Wang,Han Jiao,Ping Na
Cesium ions (Cs + ) were absorbed using electrochemically switched ion exchange (ESIX) method based on Na 2 Ti 3 O 7 nanotubes , which were synthesized on surface of foam titanium plate by one-step hydrothermal method (TNT-F). SEM, TEM, XRD , Raman and XPS were used to characterize the TNT-F. During the adsorption process , the effects of adsorption potential, initial Cs + concentration, pH value and competing ions were investigated. It was found that the application of electric field force can effectively promote the adsorption process. Furthermore, pH value and competitive ions have a slight effect on the adsorption process. The desorption ability of TNT-F was also considered. The experimental results show that the desorption ratio also can be greatly improved by applying potential. In addition, TNT-F has a good reusability and reproducibility, it also has good adsorption performance under high concentration of competitive ions. In a word, the high performance TNT-F electrode which was easy to obtain in low cost is expected to become a promising material for Cs + collection.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Bao Qin,Junhao Jiang,Hongbin Hou,Qinggang Wang,Guangye Liu
Rubber materials require nanofiller reinforcement to overcome their intrinsic low modulus and stress-at-elongation limitations. Although traditional carbon black (CB) enhances mechanical properties, its aggregation-induced filler networks exacerbate dynamic hysteresis and heat generation. Silica nanoparticles reduce rolling resistance but face challenges in limited tensile strength improvements. Emerging fillers like carbon nanotubes and graphene suffer from dispersion issues or excessive heat generation. Herein, monodisperse sodium titanate (Na 2 Ti 3 O 7 , NTO) nanorods with high aspect ratios (2–300) were synthesized via a one-step hydrothermal method and incorporated into CB/natural rubber (NR) composites. The NTO(20)/CB(30)/NR system exhibited superior static/dynamic performance: tensile strength (+16%), stress at 100% elongation (+211%), 28% lower compression heat build-up, 204% extended fatigue life, and 11% reduced Akron abrasion loss. These enhancements stem from NTO's high surface area strengthening rubber-filler interactions and rod-like morphology disrupting CB networks. This work demonstrates a scalable hybrid filler strategy to advance sustainable rubber technologies for high-performance industrial and mobility applications.
研究领域:
材料科学
·
纳米技术
·
聚合物复合材料
·
机械工程
·
汽车工程
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产品关联
DOI
高影响因子
ChemElectroChem
·
2019
·Vol. 6
·期 12
·3085-3090
·
IF 3.975
Zehua Chen,Liang Lu,Nianwu Li,Chunwen Sun
Graphical Na 2 Ti 3 O 7 nanotubes prepared by a hydrothermal method are used as anode materials for sodium-ion batteries (SIBs), showing a reversible discharge capacity of 126.2 mAh g −1 at 100 mA g −1 and an excellent cycling performance. Solid-state SIBs containing these nanotube anodes and an Na 3 Zr 2 Si 2 PO 12 solid electrolyte show a performance that is comparable to that of batteries containing a liquid electrolyte. Moreover, the prepared solid-state SIBs can store mechanical energy harvested by triboelectric nanogenerators (TENGs). Na 2 Ti 3 O 7 (NTO) is a potential anode material with low discharge voltage for room-temperature sodium-ion batteries. In this work, NTO nanotubes were prepared by a hydrothermal method. XRD, SEM, TEM, and HRTEM studies are performed to investigate the composition, morphology, and structure. As anodes for sodium-ion batteries, NTO nanotubes show a reversible capacity of 126.2 mAh g −1 at 100 mA g −1 . The discharge capacity can still reach 109 mAh g −1 even for 2000 cycles. Solid-state sodium-ion batteries containing NTO-nanotube anodes and an Na 3 Zr 2 Si 2 PO 12 solid electrolyte display a comparable performance to batteries with a liquid electrolyte. Moreover, the prepared solid-state sodium battery is also demonstrated to store mechanical energy harvested by triboelectric nanogenerators (TENGs). The discharge capacity reaches 121 mAh g −1 at 5 mA g −1 .
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2025
·Vol. 17
·期 11
·6570-6579
·
IF 5.1
Haotian Gong,Baiyao Gan,Xinkang Li,Ting Long,Biaobing Chen,Li Zou,Tong Zhou,Ziyang Ma,ZhiYe Yuan,Jiang Yin,Yahui Yang,Lishan Yang
Na-based layered transition metal oxides with an O3-type structure are considered as promising cathode materials for sodium-ion batteries (SIBs) due to their low cost, wide two-dimensional ion channels and high theoretical specific capacity. However, during storage, exposure to moisture and carbon dioxide in the air results in the formation of increased residual sodium compounds. This degradation exacerbates side reactions with the electrolyte and induces structural collapse, ultimately impairing their electrochemical performance. In this study, two titanium sources (e.g., itanium dioxide nanopowders and tetrabutyl titanate ethanol solution) were applied separately to develop two kinds of Na2Ti3O7 coatings via the reactions between the titanium sources and the residual alkaline species on the O3-Na0.95Ni1/3Fe1/3Mn1/3O2 particle surface. Both two Na2Ti3O7 coatings could effectively enhance the electrolyte wettability and Na+ conductivity of the coated cathodes, along with reducing the dissolution of transition metals during cathode cycling. In particular, the tetrabutyl titanate-derived Na2Ti3O7 coatings (5–8 nm) on O3-Na0.95Ni1/3Fe1/3Mn1/3O2 cathodes realized excellent kinetics (101.9 mA h g−1 at 10C) and optimal cycling stability (85.66% retention over 200 cycles at 1C). These findings demonstrate that the ultrathin Na2Ti3O7 coating strategy effectively enhances layered oxide cathode performance through interface engineering, offering a promising approach for developing air-stable cathodes and emerging as a pivotal technology to advance sodium-ion battery applications.
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Lixun Cheng,Xiaonan Luo,Binghui Ge
Na2Ti3O7 has attracted significant attention due to its ecofriendliness and cost-effectiveness for sodium-ion batteries. However, their limited cycling stability hampers their practical applications. Herein, we elucidate a mechanism of structural degradation caused by the heterogeneous phase transition in the Na2Ti3O7 anode using aberration-corrected (scanning) transmission electron microscopy (S)TEM and in situ TEM. It is found that the unevenly distributed phase transition results in the accumulation of strain, which promotes the growth of microcracks and eventually leads to structural decomposition and electrochemical failure. Motivated by this degradation mechanism, nanowires were proposed, and the structural stability is thus improved with the lattice strain effectively released. These findings deepen our understanding of ion transport and degradation mechanisms in intercalated layered electrode materials while emphasizing the significance of the material structure engineered for improving electrode performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2017
·
IF 3.012
Haojie Zhu,Ke Yang,Hua Lan,Shangshu Qian,Haoxiang Yu,Lei Yan,Nengbing Long,Miao Shui,Jie Shu
In this work, Na 2 Ti 3 O 7 is fabricated as lithium storage material via one-step solid state reaction. Worked as anode material , Na 2 Ti 3 O 7 delivers a stable electrochemical performance with good lithium storage capability. Structural analyses show that Na 2 Ti 3 O 7 anode experiences slight volume change during electrochemical lithiation/delithiation process. Moreover, the reversibility of structural evolution is further demonstrated by in-situ X-ray diffraction technique . All these evidences prove the cycling stability of Na 2 Ti 3 O 7 as lithium storage material. Besides, the kinetic properties of the Li + ion storage in Na 2 Ti 3 O 7 are systematically investigated. The observed results reveal that Na 2 Ti 3 O 7 delivers the lithium ions diffusion coefficient in the range of 10 − 14 –10 − 12 cm 2 s − 1 during the discharge process and 10 − 15 –10 − 12 cm 2 s − 1 during the recharge process. It suggests that Na 2 Ti 3 O 7 has good lithiation/delithiation kinetics in rechargeable batteries.
研究领域:
电化学
·
材料科学
·
能源存储
·
无机化学
·
固体化学
✓ 已验证
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
Nanomaterials
·
2025
·Vol. 15
·期 12
·885
·
IF 4.3
Chen Wu,Yuandong Xia,Kejing Song,Yongda Cao,Chenzhi Huang,Jiayi Chen,Yuan Wang,Chunliu Xu
Na2Ti3O7(NTO), with low sodium insertion potential (~0.3 V vs. Na+/Na) and potential for high-energy-density batteries, is regarded as one of the most promising anode materials for sodium-ion batteries (SIBs). However, its practical application is hindered by poor electronic conductivity, sluggish Na⁺ (de)intercalation kinetics, and interfacial instability, leading to inferior cycling stability, low initial Coulombic efficiency, and poor rate capability. In this work, micron-sized rod-like NTO and Al-doped NTO (NTO-Al) samples were synthesized via a one-step high-temperature solid-state method. Al doping slightly reduced the size of NTO microrods while introducing oxygen vacancies and generating Ti3+, thereby enhancing electronic conductivity and reducing ionic diffusion resistance. H2-TPR confirms that doping activates lattice oxygen and promotes its participation in the reaction. The optimized NTO-Al0.03 electrode delivered a significantly improved initial charge capacity of 147.4 mA h g−1at 0.5 C, surpassing pristine NTO (124.7 mA h g−1). Moreover, it exhibited the best cycling stability (49.5% capacity retention after 100 cycles) and rate performance (36.3 mA h g−1at 2 C).
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 9
·4782-4787
·
IF 3.784
Lilian Yang,Youling Hou,Guishang Pei,Yuntao Xin,Xuewei Lv
Sodium-ion batteries (NaIBs) have attracted extraordinary attentions as a promising scalable energy storage alternative to current lithium-ion batteries (LIBs), owing to their natural abundance and low costs. Sodium trititanate (Na 2 Ti 3 O 7 ) is a promising material as the material of NaIBs with low potential and high theoretical capacitance. In order to better understand their service performance when utilized in rechargeable NaIBs, studies on thermodynamic properties of Na 2 Ti 3 O 7 are indispensable. However, an extensive literature review revealed that the heat capacity of Na 2 Ti 3 O 7 is established with divergences, especially for high-temperature region. Therefore, the 99.5% purity of Na 2 Ti 3 O 7 powder was first Synthesized through solid-state reaction with sodium carbonate (Na 2 CO 3 ) and titanium dioxide (TiO 2 ) as raw materials. The as-prepared samples were used to measure the heat capacity from 573 to 1323 K which was carried out with multihigh temperature calorimeter (MHTC) 96 line. The temperature dependence of heat capacity was modeled as a function: Cp =255.51073 + 0.06059 T − 3.86912 × 106 T −2 (J mol −1 K −1 ) (298.15 - 1403 K), and then used for computing changes in enthalpy, entropy, and Gibbs free energy. Heat capacity of Na 2 Ti 3 O 7 from 0 to 1403 K was given for future application of Na 2 Ti 3 O 7 in rechargeable batteries.
研究领域:
材料科学
·
热力学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）