CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Tingting Li,Ruisong Guo,Xiaohong Sun,Fuyun Li,Xinqi Zhao,Shuhui Wang,Leichao Meng,Honglin Luo,Yizao Wan
Lithium-sulfur batteries (LSBs) possess high energy density but suffer from severe capacity fading due to the dissolution of lithium polysulfide (LiPSs). Novel design and mechanisms to encapsulate LiPSs are greatly desired by high-performance LSBs towards practical applications. Herein, we report a strategy of preparing Lithium titanate (Li 4 Ti 5 O 12 , LTO) nanofibers using bacterial cellulose as excellent biomimetic mineralization template at room temperature. Natural abundant organic molecule of Anthraquinone (AQ) combine with the zero strain fast ionic conductor of LTO can inhibit the dissolution and diffusion of LiPSs through redox reactions during cycling. The keto groups (C = O) of AQ play a critical role in forming strong Lewis acid-based chemical bonding. The 3D interwove network structure of LTO nanofibers also hinders the shuttle effect of LiPSs. Polydopamine (PDA) coated on the outermost layer not only improves the conductivity of the whole electrode, but also enhances the wettability of the electrolyte. The long-term stability of S-based electrode is ensured by the synergistic effect of the three. This mechanism leads to a long cycling stability of S-based electrodes. With a high sulfur content of ∼ 70%, a low capacity decay of 0.042%, 0.063% and 0.061% per cycle for 500 cycles at the current densities of 1, 2 and 4C, respectively. The water-soluble binder was adopted, which was a solid step for the practical application of LSBs. This finding and understanding paves an alternative avenue for the future design of S-based cathodes toward the practical application of LSBs.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qinghui Wu,Zhezheng Ding,Caijian Wang,Zijie Chen,Kunyan Sui,Yuan Liu,Pengfei Qi
Ion-sieve materials are effective and economical to extract and recovery liquid lithium in practical applications. However, it is greatly limited by its lower actual adsorption capacity than theory value as well as its tardy diffusion rate. Here, a hollow nanofiber Li 4 Ti 5 O 12 with the outer wall of acicular lamellas (LTO-A) were prepared via electrostatic spinning followed by hydrothermal lithiation techniques, showing super-high and ultra-fast extraction of lithium ions. The as-prepared LTO-A displayed abundant ions diffusion channels, polycrystalline property and large surface areas. It exhibits a remarkable adsorption capacity of 60.8 mg·g −1 , approaching to its theoretical adsorption capacity. More surprisingly, the cracks between the massive acicular lamellas facilitate the transport of lithium ions, reaching a rapid equilibrium extraction within 20 min. The LTO-A present high selectivity and stability during cycle experiments. Additionally, the matrix mixed membrane with loaded LTO-A demonstrate high lithium ions conductivity. The structure characterization and DFT calculation showed that abundant ions diffusion channels and the exposed crystal planes of (440), (400) and (111) paly central roles for the outstanding performance of LTO-A. This study provides a promising avenue for the efficient and rapid extraction of lithium from complex aqueous solutions.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Tianyu Zhu,Cuiping Yu,Yucheng Wu,Yan Wang
The capacity of Li4Ti5O12 (LTO) at high rates is limited due to the polarization caused by its modest Li-ion (Li+) diffusion coefficient and low electrical conductivity. Coating with ionic conductors is an available method to ameliorate charge transport. Li1+xAlxTi2–x(PO4)3 ion conductors with thermal, chemical, and electrochemical stabilities have been proven to be modification materials for electrodes. Herein, the Li1.4Al0.4Ti1.6(PO4)3 (LATP) precursor dispersion with optimized preparation is applied to the surface modification of LTO by a dynamic mix-drying method. A proper amount of LATP ultrafine particle coating could develop the ion transport rate in the electrode and restrain side reactions. The 2 wt % LATP–LTO anode exhibits an optimized capacity of 168.2 mA h g–1 at 0.1 A g–1 and retains 96.7% of its capacity after 5000 cycles at 5.0 A g–1, while the P-LTO anode retains 86.3% of the capacity. Improved Li+ transport and interface stability in the electrodes lead to the boosted rate and cycling stability. The LATP-modified LTO composites provide a possibility for the further application of related materials in the energy storage field.
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 11
·14519-14531
·
IF 2.478
Yin Hongxia,Zhao Shiyi,Hao Chuncheng,Lei Qingquan
Space charge accumulation in the insulating layers of high voltage direct current cables is the key factor that leads to their degradation and limits the operation safety. Hence, it is necessary to effectively inhibit space charge injection to these layers. In this study, a new method is proposed to suppress the charge injection to cable insulation layer: a certain amount of Li 4 Ti 5 O 12 nanopowder is doped into the semiconductive screen to enhance the internal conductive network and homogenize the electric field. The influences of Li 4 Ti 5 O 12 particles in the semiconductive composite screen on the positive temperature coefficient effect and space charge injection process are explored. The obtained results reveal that the charge quantity in the insulation layer corresponding to the minimum peak resistivity is reduced by 49.7%, 58.9%, and 46.9% after polarization at a Li 4 Ti 5 O 12 content of 4 wt% and electric field strengths of 10, 20, and 30 kV/mm, respectively.
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ailing Hwang,Yulin Ma,Yi Cao,Qin Li,Long Wang,Xinqun Cheng,Pengjian Zuo,Chunyu Du,Yunzhi Gao,Geping Yin
Li 6 PS 5 Cl-coated Li 4 Ti 5 O 12 materials was fabricated by a simple liquid-phase treatment method. Charge-discharge tests show that Li 6 PS 5 Cl-coated Li 4 Ti 5 O 12 (LTO@LPSCl)/Li 6 PS 5 Cl/Li all-solid-state lithium batteries exhibit high reversible capacity (~158 mA h·g -1 ) after 250 cycles under 0.05 C and excellent rate capacity (~50 mA h·g -1 ) under 1 C at 80 °C .A combination of scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) mapping, and electrochemical impedance spectra (EIS) reveals that good wettability of liquid with Li 4 Ti 5 O 12 materials and Li 6 PS 5 Cl is responsible for Li 6 PS 5 Cl nanoparticle coated on the surface of Li 4 Ti 5 O 12 materials homogenously, which build the stable interface between active materials and solid state electrolyte, reduce the interface resistance effectively, and result in excellent electrochemical performances.
研究领域:
材料科学
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电化学
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固态离子学
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能源存储
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纳米材料
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 93
·90455-90461
·
IF 3.289
Peng Lu,Xiaobing Huang,Yurong Ren,Jianning Ding,Haiyan Wang,Shibiao Zhou,Yuandao Chen,Xiang Ding
Na+ and Zr4+ co-doped lithium titanates with the formula Li4−xNaxTi5−xZrxO12 (x = 0, 0.01, 0.03, 0.05, 0.10, 0.15 and 0.20) were successfully synthesized via a solid-state reaction in air. XRD analysis indicates that Na+ and Zr4+ co-doping does not change the spinel structure of Li4Ti5O12 and the lattice parameter slightly increases with the enhancement of doping amount. Smaller particle size and larger BET surface areas are obtained for Na+ and Zr4+ co-doped Li4Ti5O12 samples. The four-point probe method and electrochemical impedance spectroscopy (EIS) results demonstrate that the Na+ and Zr4+ co-doped Li4Ti5O12 samples possess higher electrical conductivity and smaller charge transfer resistance compared with undoped Li4Ti5O12, resulting in improved electrochemical performance. Particularly, Li3.97Na0.03Ti4.97Zr0.03O12 exhibits the best rate capability and cycling stability. Even at 20C, it delivers a discharge capacity of 140 mA h g−1, and after 100 cycles at 10C, 97.7% of its initial capacity is retained.
研究领域:
材料科学
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电化学
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储能技术
·
锂离子电池
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DOI
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Bingbing Pan,Zhouqiao Zhao,Pu Hu,Zhanhui Zhang,Zhiliang Huang
Li 4 Ti 5 O 12 /TiO 2 composite, pure Li 4 Ti 5 O 12 and Li 4 Ti 5 O 12 /Li 2 TiO 3 composite are synthesized through a high temperature solid-state approach by adjusting the molar ratio of Li/Ti precursors. Pure Li 4 Ti 5 O 12 can be obtained when the molar ratio of Li/Ti precursor materials is 0.80, while low and over stoichiometric ratio of Li 4 Ti 5 O 12 would lead to the formation of the second phase of rutile TiO 2 and Li 2 TiO 3 , respectively. The electrochemical performance of the obtained materials as anode materials for Li-ion batteries is tested under potential range of 0.02–2.5 V in Li half-cell. The results show that all the samples exhibit two potential plateaus at ~1.5 V and ~0.75 V at various C-rate. Among the obtained samples, Li 4 Ti 5 O 12 /TiO 2 composite exhibits the best cycling stability and rate capability. The second phase TiO 2 facilitates the diffusion of Li + and significantly enhances the rate capability.
研究领域:
材料科学
·
电化学
·
储能
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DOI
高影响因子
NANO
·
2017
·
IF 1.025
Aijia Wei,Wen Li,Lihui Zhang,Xiaohui Li,Xue Bai,Zhenfa Liu
Zn 2 + and F − ions are successfully used to modify pure Li 4 Ti 5 O 1 2 via a co-precipitation method followed by calcination at 400 ∘ C for 5 h in an Ar atmosphere in order to further investigate the reaction mechanism of the fluoride modification process. Zn 2 + and F − co-modified Li 4 Ti 5 O 1 2 samples are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and electrochemical measurements. After the modification process, no ZnF 2 coating layer is formed on the surface of Li 4 Ti 5 O 1 2 , instead, F − ions react with Li 4 Ti 5 O 1 2 to generate a new phase, composed of a small amount of anatase TiO 2 , rutile TiO 2 , LiF, and Zn 2 + ions are suspected to form a ZnO coating layer on Li 4 Ti 5 O 1 2 particles. The electrolyte reduction decomposition is suppressed in Zn 2 + and F − co-modified Li 4 Ti 5 O 1 2 due to the ZnO coating layer. 1 wt.% Zn 2 + and F − co-modified Li 4 Ti 5 O 1 2 exhibits the best rate capability, which leads to a charge capacity of 236.7, 227.8, 222.1, 202.7, 188.9 and 150.7 mAh g − 1 at 0.2C, 0.5C, 1C, 3C, 5C and 10C, respectively, between 0 V and 3 V. Furthermore, 1 wt.% Zn 2 + and F − co-modified Li 4 Ti 5 O 1 2 exhibits 96.0% charge capacity retention at 3C rate after 200 cycles, which is significantly higher than that of pure Li 4 Ti 5 O 1 2 (78.4%).
研究领域:
材料科学
·
电化学
·
储能技术
·
锂离子电池
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DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Zhufeng Shen,Daxing Lei,Dongchen Jia,Dongwei Yang,Xuemei Zhou,Xiaolong Leng,Lei Zhu,Zhi Yang,Dong Cai
Silicon/carbon (Si/C) composite anodes face critical challenges in fast-charging lithium-ion batteries, including structural degradation from volume expansion, sluggish Li + transport kinetics, and unstable electrode-electrolyte interfaces. Current strategies typically compromise between energy density and stability. Here, we address these issues through a bilayer electrode structural design (LTO@Si/C-1500), comprising an upper lithium titanate (LTO) layer and a lower commercial Si/C-1500 substrate. The LTO film provides physical shielding, forming a stable protective interface against reactive electrolytes while enabling three-dimensional Li + pathways and mechanically constraining the underlying Si/C-1500 material. Electrochemical characterization demonstrates exceptional battery performances, with specific capacities of 665.09 mAh g −1 after 120 cycles at 3 A g −1 and 447.86 mAh g −1 after 300 cycles at 5 A g −1 . Moreover, the LTO layer reduces electrode expansion to 30.38% compared to 87.13% in pristine Si/C-1500 electrodes. This multilayer electrode design, combined with LTO physical coating, offers a promising solution for fast-charging lithium-ion batteries and may advance multi-component anode systems.
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Mandi Ji,Yunlong Xu,Zhen Zhao,Huang Zhang,Dong Liu,Chongjun Zhao,Xiuzhen Qian,Chunhua Zhao
La 3+ and F − co-doped Li 4 Ti 5 O 12 (LTO) anode materials are synthesized successfully via a solid state reaction. The structure and morphology are characterized by XRD , SEM and EDS . The results indicate that La 3+ and F − ions were uniformly dispersed in Li 4 Ti 5 O 12 lattice without changing the structure and morphology of Li 4 Ti 5 O 12 . Li 3.95 La 0.05 Ti 5 O 11.7 F 0.3 (La005-F03) exhibits an outstanding electrochemical performance among all the samples in a potential range from 0.5 to 2.5 V, and delivers a discharge capacity of 103 mAh g −1 at 10C rate, whereas the LTO only gives 62.5 mAh g −1 . The sample La005-F03 retains a discharge capacity of 170.1 mAh g −1 after 100 cycles at 1C rate. The improved electrochemical performance could be attributed to the appropriate co-doping with La 3+ and F − , which can increase the amount of Ti 3+ /Ti 4+ mixing as charge compensation, leading to the decrease of the charge transfer resistance and improvement of the electronic conductivity and lithium ion diffusion coefficient .
研究领域:
材料科学
·
电化学
·
储能技术
·
无机化学
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DOI
高影响因子
IONICS
·
2019
·Vol. 26
·期 2
·627-637
·
IF 2.289
Zhai Huanhuan,Shuai Yi,Wang Yu,Chen Kanghua
As a negative electrode material, the main drawbacks of Li 4 Ti 5 O 12 (LTO) are its low electric conductivity and poor Li-ion diffusion coefficient. Fortunately, elements modification to address these problems is an effective method. Herein, we firstly report Ni and F co-modified LTO material which is synthesized via a solid-state reaction. Powder X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy were conducted to investigate the structure and morphology. Afterwards, we surprisingly find that Ni and F co-modification can reduce the overall charge transfer resistance of LTO for part of Ti 4+ converts into Ti 3+ and Ni 2+ ions supply the charge carriers. When test in battery, a superior discharge capacity of 236.1 mAh g −1 at 0.036 A g −1 is obtained, much higher than that of pristine LTO (196.9 mAh g −1 ). Furthermore, it still retains a discharge capacity of 174.6 mAh g −1 after 200 cycles at 0.18 A g −1 and exhibits an excellent rate performance.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固体化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Guorong Hu,Jilin Wu,Ke Du,Zhongdong Peng,Ming Jia,Hao Yang,Yanbing Cao
The surface-fluorinated Li 4 Ti 5 O 12 nanowires/reduced graphene oxide composite is synthesized through a hydrothermal procedure. Lithium ion transport is promoted by forming a special morphology of lithium titanate nanowires, meanwhile, electronic transmission is facilitated by surface fluorination and conductive network of graphene coating. These three kinds of synergistic effects greatly improve the rate performance of lithium titanate . The surface-fluorinated Li 4 Ti 5 O 12 nanowires/reduced graphene oxide composite exhibits high specific capacities (167.5 mAh g −1 at 1 C and even 132.6 mAh g −1 at 10 C) and good cyclic stability (95% capacity remain after 300 cycles at 5 C). The influences of surface fluorination and graphene coating on electrochemical performance of lithium titanate are investigated in detail in terms of reversible capacity, cyclability and rate capability. Its excellent electrochemical properties make it become possible to be a potential anode material for high-rate lithium-ion batteries applied in high power facilities.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
锂离子电池
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）