Sustainable Materials and Technologies
·
2021
·
IF 7.053
C.H. Wang,L. Huang,Y. Zhong,X.L. Tong,C.D. Gu,X.H. Xia,Lingjie Zhang,X.L. Wang,J.P. Tu
High-performance lithium ion batteries (LIBs) with high energy/power density are always the persistent pursuit of people. High-quality anode is the key point for the performance improvement of LIBs. In this work, a facile combined strategy is proposed to construct integrated TNO/AOSC electrode, in which Aspergillus Oryzae Spore Carbon (AOSC) conductive matrix is employed to hold Ti 2 Nb 10 O 29 (TNO) nanoparticles . The TNO/AOSC not only shortens electron/ion transfer pathway on account of the nanostructure of TNO, but also provides better chemical stability from AOSC skeleton. Accordingly, the preeminent rate capacity (135.2 mA h g −1 at 10C) and relatively superior cycle stability (a capacity of 149.8 mA h g −1 after 200 cycles at 1C) are obtained for the TNO/AOSC, much better than TNO counterpart. The superior performance of the TNO/AOSC can be ascribed to the beneficial synergistic factors on enhanced electronic conductivity and solider structure from AOSC substrate. This intriguing design strategy may trigger interest for design of other high-quality electrodes in LIBs.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Meiling Xie,Hekai Zhu,Minghao Fang,Zhaohui Huang,Yan’gai Liu,Xiaowen Wu
Ti 2 Nb 10 O 29 photocatalysts were successfully synthesized by three different methods. Ti 2 Nb 10 O 29 fabricated by the solvothermal method (ST-TNO) exhibited unique microspheres compared to the larger irregular particles observed for the samples annealed in air (Air-TNO) and Ar (Ar-TNO). X-ray Photoelectron Spectroscopy (XPS) results revealed that a partial reduction process from Ti 4+ into Ti 3+ occurs in Ar-TNO, because of the introduction of oxygen defects. Ar-TNO exhibited visible-light absorption with a band gap of 2.85 eV, while the absorption edges of Air-TNO and ST-TNO were approximately 400 nm. Under UV light irradiation (λ < 420 nm), Ar-TNO exhibited a photocatalytic activity 2.1 times greater than that of Air-TNO, corresponding to the highest activity. The results indicated that the preparation method is crucial for determining the band gap and photocatalytic activity of semiconductors. Moreover, the novel semiconductor photocatalyst can be further applied for constructing the heterojunction and designing the band structure.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Chao Yang,Shu Yu,Yu Ma,Chunfu Lin,Zhihao Xu,Hua Zhao,Shunqing Wu,Peng Zheng,Zi-Zhong Zhu,Jianbao Li,Ning Wang
Ti 2 Nb 10 O 29 is an advanced anode material for lithium-ion batteries due to its large specific capacity and high safety. However, its poor electronic/ionic conductivity significantly limits its rate capability. To tackle this issue, a Cr 3+ –Nb 5+ co-doping is employed, and a series of Cr x Ti 2–2 x Nb 10+ x O 29 compounds are prepared. The co-doping does not change the Wadsley–Roth shear structure but increases the unit-cell volume and decreases the particle size. Due to the increased unit-cell volumes, the co-doped samples show increased Li + -ion diffusion coefficients . Experimental data and first-principle calculations reveal significantly increased electronic conductivities arising from the formation of impurity bands after the co-doping. The improvements of the electronic/ionic conductivities and the smaller particle sizes in the co-doped samples significantly contribute to improving their electrochemical properties . During the first cycle at 0.1 C, the optimized Cr 0.6 Ti 0.8 Nb 10.6 O 29 sample delivers a large reversible capacity of 322 mAh g −1 with a large first-cycle Coulombic efficiency of 94.7%. At 10 C, it retains a large capacity of 206 mAh g −1 , while that of Ti 2 Nb 10 O 29 is only 80 mAh g −1 . Furthermore, Cr 0.6 Ti 0.8 Nb 10.6 O 29 shows high cyclic stability as demonstrated in over 500 cycles at 10 C with tiny capacity loss of only 0.01% per cycle.
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
Materials Today
·
2021
·
IF 31.041
Tao Yuan,Sainan Luo,Luke Soule,Jeng-Han Wang,Yachen Wang,Dewang Sun,Bote Zhao,Wenwu Li,Junhe Yang,Shiyou Zheng,Meilin Liu
Ti 2 Nb 10 O 29 (TNO) is a suitable electrode for high-performance lithium-ion batteries and capacitors because of its large lithium storage capacity and high Li + diffusivity . Currently, the rate or power capability of TNO-based systems is limited by the poor electronic conductivity of the material. Here we report our findings in design, synthesis, and characterization of a hierarchical N-rich carbon conductive layer wrapped TNO structure (TNO@NC) using a novel polypyrrole-chemical vapor deposition (PPy-CVD) process. It was found that carbon coating with PPy–carbon partially reduces Ti and Nb cations, forms TiN, and creates oxygen vacancies in the TNO@NC structure that further increase overall electronic and ionic conductivity . Various defect models and density functional theory (DFT) calculations are used to show how oxygen vacancies influence the electronic structure and Li-ion diffusion energy of the TNO@NC composite. The optimized TNO@NC sample shows notable rate capability in half-cells with a reversible capacity of 300 mAh g −1 at 1 C rate and maintains 211 mAh g −1 at a rate of 100 C, which is superior to that of most M x Nb y O z materials. Full cell LiNi 0.5 Mn 1.5 O 4 (LNMO)||TNO@NC lithium-ion batteries (LIB) and active carbon (AC)||TNO@NC hybrid lithium-ion capacitors (LIC) exhibited notable volumetric and gravimetric energy and power densities.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
固态离子学
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Shengjue Deng,Zhibin Luo,Yating Liu,Xiaoming Lou,Chunfu Lin,Chao Yang,Hua Zhao,Peng Zheng,Zhongliang Sun,Jianbao Li,Ning Wang,Hui Wu
Ti 2 Nb 10 O 29 has recently been reported as a promising anode material for lithium-ion batteries. However, its poor electronic conductivity and insufficient Li + -ion diffusion coefficient significantly limit its rate capability. To tackle this issue, a strategy combining nanosizing and crystal-structure modification is employed. Ti 2 Nb 10 O 29– x mesoporous microspheres with a sphere-size range of 0.5–4 μm are prepared by a one-step solvothermal method followed by thermal treatment in N 2 . These Ti 2 Nb 10 O 29– x mesoporous microspheres exhibit primary nanoparticles , a large specific surface area (22.9 m 2 g −1 ) and suitable pore sizes, leading to easy electron/Li + -ion transport and good interfacial reactivity. Ti 2 Nb 10 O 29– x shows a defective shear ReO 3 crystal structure with O 2− vacancies and an increased unit cell volume, resulting in its increased Li + -ion diffusion coefficient. Besides Ti 4+ and Nb 5+ ions, Ti 2 Nb 10 O 29– x comprises Nb 4+ ions with unpaired 4 d electrons, which significantly increase its electronic conductivity. As a result of these improvements, the Ti 2 Nb 10 O 29– x mesoporous microspheres reveal superior electrochemical performances in term of large reversible specific capacity (309 mAh g −1 at 0.1 C), outstanding rate capability (235 mAh g −1 at 40 C) and durable cyclic stability (capacity retention of 92.1% over 100 cycles at 10 C).
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
固态化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Wellars Utetiwabo,Muhammad Khurram Tufail,Chaoyuan Zeng,Lei Zhou,Le Yang,Ze Hua,Jinfeng Zeng,Peiwen Yu,Ruiwen Shao,Wen Yang
The induction of cation dopant into the lattice structure of anode materials is a feasible and effective method to modulate the electronic structure and induce different active sites for Li + storage. However, it is a challenge to create the cation dopant into the structure of the transition metal oxides anode of the lithium-ion batteries (LIBs). In this work, we propose an in-situ source template thermal reduction of graphite foam (GF) and annealing process for the first time to successfully induce Ti 3+ into the titanium niobium oxide (Ti 2 Nb 10 O 29 , TNO) nanocrystal structure denoted as TNO@GF for high-energy/power lithium storage. The induction of Ti 3+ could not only prompt the more active sites for Li + ion storage but also modulate the electronic interaction between the active sites and the intercalated Li + ion, leading to the favorable Li + ions intercalation and minimizing the Li + -ion diffusion barriers in the open channel of the ReO 3- type structure unit. Due to the combined effect of nanocrystal structure and Ti 3+ , TNO@GF yields a higher reversible discharge capacity of 328 mAh g −1 at 0.1C, a higher rate capability of 296.3 mAh g −1 ; and keeps 207.88 mAh g −1 at a high rate of 35 C and shows good cycling stability (217.73 mAh g −1 at the rate of 10 C) with the capacity retention of 83.20 % after 500 cycles. These findings provide insights into cation engineering and its influence on the functional nanomaterials' physicochemical properties, which are not achievable in the perfect crystal for advanced energy storage applications.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 48
·期 16
·23334-23340
·
IF 5.532
Hanghang Li,Xinhao Cai,Jing Li,Chenchen Deng,Yiwen Liu,Huihui Yan,Haoxiang Yu,Liyuan Zhang,Miao Shui,Lei Yan,Jie Shu
Titanium niobate prepared by traditional techniques has the shortcomings of low ion diffusion coefficient as well as poor electrical conductivity , which drastically reduce its applicability. In this work, we prepare carbon coated Ti 2 Nb 10 O 29 hollow submicron ribbons (Ti 2 Nb 10 O 29 @C HSR) using a simple electrospinning procedure. As anode material for lithium-ion batteries (LIBs), it delivers a high charge capacity of 259.7 mAh g −1 at 1 C with low capacity loss of 0.013% in long-term cycles. Increased the current density to 5 C, Ti 2 Nb 10 O 29 @C HSR can maintain a reversible capacity of 189.9 mAh g −1 , indicating its good rate performance. Additionally, this work uses in-situ X-ray diffraction (XRD) to provide an explanation for the lithium storage process in Ti 2 Nb 10 O 29 @C HSR, demonstrating the high reversibility during charge/discharge cycles. Therefore, Ti 2 Nb 10 O 29 @C HSR has outstanding cycle adaptability and structural reversibility to be a promising anode for LIBs.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
无机功能材料
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 40
·21134-21139
·
IF 8.867
Xinhui Xia,Shengjue Deng,Shangshen Feng,Jianbo Wu,Jiangping Tu
Lithium ions batteries (LIBs) with high power/energy densities largely rely on the innovation of electrode materials. Herein, for the first time, we rationally construct novel titanium niobium oxide (Ti2Nb10O29, TNO) nanospheres with a three-dimensional porous structure consisting of cross-linked nanoparticles by a simple solvothermal method combined with heat treatment. Compared to bulk TNO microrods, the obtained TNO nanospheres show a larger specific surface area and richer/shorter transfer channels for ions/electrons. Owing to these advantages, the TNO nanosphere electrode exhibits noticeable exceptional electrochemical performance with superior high-rate capability (241 mA h g−1 at 10C, and 208 mA h g−1 at 20C) and ultra-long life with a capacity of 215 mA h g−1 after 500 cycles at 10C, much better than the TNO microrod counterparts. Our findings may pave a new way for the design/fabrication of the state-of-the-art electrodes for electrochemical energy storage.
研究领域:
材料科学
·
电化学
·
能量存储与转换
·
纳米材料
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2017
·
IF 0
Shengjue Deng,Dongliang Chao,Yu Zhong,Yinxiang Zeng,Zhujun Yao,Jiye Zhan,Yadong Wang,Xiuli Wang,Xihong Lu,Xinhui Xia,Jiangping Tu
The advancement of lithium ions batteries (LIBs) largely relies on the innovation of electrode materials with high power/energy densities, which are highly related to electrode structure and interface characteristics between electrolyte and electrode. In this work, for the first time, we realize the rational integration of titanium niobium oxide (Ti 2 Nb 10 O 29 , TNO) and vertical graphene (VG) into free-standing arrays with intimate core/shell structure. More excitingly, to make the above VG/TNO more perfect, hydrogen molybdenum bronze (HMB) is controllably introduced as a conductive shell to form the ultimate VG/TNO/HMB core/shell composite arrays (CSCAs). VG and HMB serve as powerful conductive “body guards” for TNO guest, both inside and out. With the enhanced conductivity and reinforced structural stability , the VG/TNO/HMB CSCAs are demonstrated with excellent lithium ion storage performance with higher capacities (317 mAh g −1 at 2 C, and 163 mAh g −1 at 60 C), and better cycling life and superior high-rate capability to VG/TNO counterpart. Our findings may offer a promising prospect for construction of advanced high-rate electrodes for electrochemical energy storage .
研究领域:
材料科学
·
电化学
·
能量存储
·
纳米材料
·
锂离子电池
✓ 已验证
DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yonghua Sun,Yuyang Gao,Zhuo Chen,Junhe Yang,Tao Yuan,Yuepeng Pang,Shiyou Zheng
Ti 2 Nb 10 O 29 (TNO) anodes demonstrate significant potential for fast-charging lithium-ion batteries (LIBs) owing to their inherent safety, high capacity, and robust durability. However, their practical implementation is constrained by sluggish Li + diffusion kinetics and limited electronic conductivity. In this study, we systematically explore the impact of strategically incorporating trivalent heteroatoms (Ti 2 Nb 9.9 M 0.1 O 29 , denoted as M-TNO, where M = Al, Fe, Y, La, and Gd) on the orbital hybridization and delocalized electronic structure of TNO. Specifically, elements with unsaturated outer electrons (e.g., Fe and Gd) introduce dopant energy levels within the bandgap, thereby enhancing the electrochemical response. Meanwhile, elements with larger electronic configurations (e.g., La and Gd) promote hybridization between their 5d orbitals and the Ti 3d and O 2p orbitals, improving reaction kinetics. Among the modified samples, Gd-TNO exhibits the most pronounced enhancement in Li + diffusion kinetics, attributed to Gd-induced interlayer expansion and shortened diffusion pathways. The optimized Gd 0.1 -TNO delivers a high capacity of 295.0 mAh g −1 at 0.5 C, an exceptional rate capacity of 190.9 mAh g −1 at 10 C, and remarkable cycling stability with a minimal capacity loss of 0.038 % per cycle over 1000 cycles at 10 C. This work provides critical insights into the role of trivalent heteroatoms in enhancing the performance of TNO anodes, offering a novel strategy for the design of high-performance LIB materials.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Meili Qi,Ming Hu,Jianwei Xu,Xinhua Yuan,Zhiping Zhang
With high capacity and its safety, titanium niobium oxide (Ti 2 Nb 10 O 29 , TNO) has been reported as a potential anode for high power lithium ion batteries . However, insufficient diffusion coefficient of Lithium-ions and poor electronic conductivity for this electrode material significantly constrains its rate capability. To solve this issue, we propose a simple strategy to encapsulate Ti 2 Nb 10 O 29 in porous carbon nanofiber arrays (porous TNO/CNF) and to prepare heterogeneous Ti 2 Nb 10 O 29 /carbon nanofiber core-shell composite arrays (TNO NPs-CNF) using polyamic acid (PAA) as the polymer precursor. TNO NPs-CNF electrode exhibits significantly superior electrochemical performance (286 mA h g −1 at 10 C and 225 mA h g −1 at 20 C), much better than the TNO and porous TNO/CNF. For the electrode of porous TNO/CNF and TNO NPs-CNF, the omni-directional conducting networks of CNF skeleton greatly enhances electron transport of the whole electrode, reduces energy barrier of lithium ion transport, and maintains the structure’s stability.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Shengjue Deng,Yan Zhang,Dong Xie,Liang Yang,Guizhen Wang,XuSheng Zheng,Junfa Zhu,Xiuli Wang,Yan Yu,Guoxiang Pan,Xinhui Xia,Jiangping Tu
Rational design & modulation of ion/electron transfer paths are critical for achieving high-performance anode materials for lithium ion batteries . In this work, we first time realize smart assembly of oxygen vacancy modulated titanium niobium oxide (Ti 2 Nb 10 O 29-x , TNO x ) onto highly conductive bacterial cellulose carbon (BCC) forming BCC/TNO x electrode through a facile solvothermal-annealing method. BCC consists of interlinked (N, S & P) co-doped carbon fibres uniformly decorated with TNO x nanoparticles . Impressively, the introduction of oxygen vacancy can effectively enhance the internal ion/electron transfer in TNO x and enhancement effect is elaborated by synchrotron radiation technology (XANES and XAFS) and DFT calculation. Meanwhile, with the aid of conductive BCC skeleton, the external ion/electron transfer path on TNO x is also greatly improved leading to better reaction kinetics. The synergistic dual internal plus external modulation on transfer path show positive advantages including smaller band gap with better electrical conductivity , and larger lattice parameters with faster ion/electron transfer. Accordingly, the BCC/TNO x electrode is endowed with outstanding lithium ion storage performance with high-rate capability (281 mA h g −1 at 5 C, and 160.5 mA h g −1 at 40 C). Our finding provides valuable insights into design of other advanced electrodes via dual transfer path modulation strategy.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
固体物理
·
计算材料学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）