Batteries & Supercaps
·
2026
·Vol. 9
·期 6
·e70340
·
IF 4.5
Maolong Xu,Xudong Zhang,Yuanjie Zhang,Guorong Hu,Zhongdong Peng,Yanbing Cao,Ke Du
Spinel LiNi 0.5 Mn 1.5 O 4 is a promising high-voltage cathode material for lithium-ion batteries, but its application is limited by Mn dissolution and poor high-temperature stability. Herein, Al-doped, Co-doped, and Al/Co codoped LNMO materials were synthesized via a high-temperature solid-state method. All samples retain the spinel structure (Fd m), while Al and Co doping reduces Mn 3+ content, induces lattice contraction, and enhances structural stability. The Al/Co codoped LNMO exhibits reduced polarization, enhanced Li + diffusion kinetics, and improved cycling and rate performance. Notably, it retains 96.7% of its initial capacity after 100 cycles at 50°C and 1°C, accompanied by suppressed Mn dissolution. These results demonstrate that Al/Co codoping is an effective strategy to improve the structural and electrochemical stability of LNMO under high-temperature conditions. Graphical Al/Co codoping reduces the Mn³ + content and suppresses Mn dissolution, thereby stabilizing the crystal structure and electrode/electrolyte interface, significantly enhancing the cycling stability and capacity retention of LNMO at elevated temperatures.
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DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yujiao Cao,Chenghao Qiu,Jipeng Li,Jun Chen,Jianguo Yu,Sen Lin
Lithium aluminum layered double hydroxides (Li/Al-LDHs), the most widely industrialized lithium adsorbents dependent on the unique acid-free desorption, while exhibited limited capacity in low-salinity systems. Herein, an anion regulation strategy was developed to enhance Li + extraction by introducing and controlling multivalent anions. Experiments confirmed Li + adsorption capacity of Li/Al-LDHs could increase from 0.40 mg/g to 5.83 mg/g by introducing SO 4 2− in a chloride solution containing 2 g/L Mg 2+ . It was well explained by density functional theory (DFT) calculations that the highly charged anions in solution would induce higher ionic strength and adsorption energy to enhance Li + extraction of Li/Al-LDHs. Furthermore, an interlayer repair method effectively replaced accumulated divalent anions within the interlayers using easily elutable Cl − ions, facilitating Li + release from the laminates and ensuring cycling stability. Besides, multiple cycles remaining stable enhanced capacities further confirmed the sustained effectiveness of this strategy for boosting Li + capture from low-salinity systems.
研究领域:
材料科学
·
环境工程
·
无机化学
·
储能
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jun Cheng,Wenjie Lin,Jingrong Hou,Yaqi Liao,Yunhui Huang
As the classic cathode material, lithium cobalt oxide (LiCoO2, LCO) suffers from severe structural and interfacial degradation at voltage >4.5 V, which induces fast capacity decay of the cells. Herein, we adopt a simple and effective method, doping aluminum (Al) cations in precursors, to improve the structural stability of LCO and systematically investigate the effect of Al doping on the electrochemical performances. Doping in precursors rather than bulk particles is beneficial to realize uniform Al ions distribution. Even at 4.5 V charging voltage, the LCO/graphite pouch cells with high Al doping levels (8500 ppm) deliver initial and reversible discharge capacities of 386 and 369 mAh after 500 cycles, respectively. The capacity retention is as high as 95.5%. When the cutoff voltage reaches 4.55 V, the pouch cell maintains 79.0% of the first-cycle discharge capacity after 500 cycles. With optimized electrolyte, the pouch cell realizes 87.3% of the initial discharge capacity after 500 cycles at 45 °C. Moreover, the thermal safety performance of the pouch cells with Al doping is promising. Our work displays an excellent inspiration for developing high-voltage, long-cycle, and safe LCO cathode for commercial lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 6
·2538-2546
·
IF 4.569
Xingyu Liu,Xiaoyue Wang,Rui Miao,Yanzhi Sun,Yongmei Chen,Yang Tang,Pingyu Wan,Junqing Pan
Metal organic frameworks (MOFs) and their derivatives have been widely used in electrochemistry due to their adjustable pore size and high specific surface area (SSA). Herein, a spindle-like hierarchical porous activated carbon (SPC) was synthesized through carbonizing the Al-BTEC precursor and then alkaline washing with NaOH. The fabricated SPC has a uniform shuttle-shaped structure, showing a large BET surface area of 1895 m2 g−1 and an average pore size of 2.4 nm. The SPC product displays a high specific capacitance (SC) of 337 F g−1 at 1 mV s−1 and 334 F g−1 at 1 A g−1. The retention of SC is about 95% after 100 000 cycles when the current density is 50 A g−1, indicating its excellent stability. Furthermore, the assembled symmetrical capacitor with a two-electrode system exhibits a high SC of 173 F g−1 at 1 A g−1 and an energy density of 15.3 W h kg−1 at a power density of 336 W kg−1. This work would provide a new pathway to design and synthesize carbon materials for supercapacitors with excellent properties in the future.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Rongkai Du,Xulin He,Yuefei Xiang,Junfu Tang,Lei Zhou,Juncheng Zhang,Tianying Sun,Mingmei Wu
The development of self-powered and non-pre-irradiation mechanoluminescent (ML) materials holds significant promise for achieving dynamic and real-time visualized stress distribution display. In this work, isomorphic ML materials Sr 3 MO 4 F:Ln 3+ (M = Al, Ga) were synthesized that exhibit repeatable ML without the need for pre-irradiation. These materials present non-piezoelectric and non-trap-controlled ML behaviors, resulting from contact electrification due to the interaction between phosphor and polydimethylsiloxane polymer under stress. Given the similar crystal structures and spectral properties, we substitute the complex measurements of electron transfer in the contact electrification process with straightforward theoretical modeling and calculations to elucidate the origins, mechanisms, and processes of interfacial triboelectrification-induced ML behaviors between Sr 3 MO 4 F phosphors and PDMS polymers. The experiments and density functional theory (DFT) calculations indicate a positive correlation among transferred charge, surface triboelectric potential, and ML intensity. This work not only introduces a new class of ML materials but also makes an effort at establishing and harmonizing the structure-performance relationships for triboelectrification-induced ML materials.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2011
·Vol. 94
·期 11
·3976-3982
·
IF 2.169
Hui Luo,Jie Liu,Xuxin Pu,Jie Liang,Zhengjun Wang,Feijiu Wang,Kun Zhang,Yingjie Peng,Bo Xu,Jihong Li,Xibin Yu
The reaction of aluminum with pure water is an eco-friendly approach to generate hydrogen. The main difficulty associated with this approach is that an oxide or hydroxide protective film around aluminum particles prohibit the hydrogen generation. In this article, a kind of highly activated Al–Ce composite material has been developed via a convenient ball milling method. Typically, Al–13 wt% Ce has a total hydrogen production of 1134 mL/g and a conversion yield of 92.42% within 60 min. The influences of the cerium concentration and ball milling time on the hydrogen production efficiency are discussed based on XPS, XRD, FESEM, and BET techniques. In addition, the hydrogen production efficiency can be improved by adding alkali chloride (NaCl or KCl) to the Al–Ce composite materials.
研究领域:
材料科学
·
氢能
·
化学工程
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DOI
高影响因子
Energy Technology
·
2026
·Vol. 14
·期 6
·e70548
·
IF 3.6
Sicheng Zhang,Shensong Wang,Xinyi Zhang
As a representative nickel-based cathode material, layered nickel hydroxide (Ni(OH) 2 ) demonstrates significant potential in electrochemical energy storage devices, such as nickel-iron batteries and supercapacitors, owing to its high theoretical specific capacity of 289 mAh g −1 . However, constrained by the inherent structural instability in practical systems, Ni(OH) 2 is difficult to demonstrate satisfactory electrochemical performance. In this work, we demonstrate an effective heterovalent doping strategy, successfully substituting aluminum (Al) for nickel (Ni) within the Ni(OH) 2 lattice. Experimental and theoretical calculations reveal that Al can be incorporated into the Ni(OH) 2 lattice by substituting Ni atoms, thereby modifying the internal charge distribution, electrochemical behavior, and structural stability. Consequently, Ni(OH) 2 with an Al doping level of 11% displays the best electrochemical performance. At the current density of 1 A g −1 , it delivers a specific capacity of 276 mAh g −1 . With the current density increasing to 5 A g −1 , the specific capacity can still remain at 201.3 mAh g −1 . This work presents a new approach for significantly enhancing the specific capacity of nickel hydroxide by doping with invariant-valence elements, and identifies the doping amount as the key factor influencing the specific capacity.
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Haibing Zhang,Haitao Wu,Peng Xu,Zidong Li,Wuyang Zhang,Huixian Huang,Qing Zhou,Xingui Yue,Jiankang Bao,Xueming Li
In this study, a superhydrophobic Al/Fe 2 O 3 nanothermite with long–term storage stability was prepared by electrophoretic deposition of nano–Al particles and nano– Fe 2 O 3 microboxes on Ti substrate and subsequent modification process. The composition and morphology of Al/ Fe 2 O 3 nanothermite were systematically characterised through X–ray diffraction and scanning electron microscope. In addition, the water contact angle measurements and the immersion test demonstrated the excellent superhydrophobic properties of the as–prepared Al/ Fe 2 O 3 nanothermite. 10 days after underwater immersion, the heat release of the superhydrophobic Al/ Fe 2 O 3 nanothermite remained 982.7 J/g, which was higher than 514.6 J/g of the sample without superhydrophobic treatment. This work provides a beneficial sight for enhancing the long–term storage stability of nanothermite in practical application.
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Haiping Lei,Jiguo Tu,Suqin Li,Jiacheng Wang,Zheng Huang,Zhijing Yu,Shuqiang Jiao
Aluminum-selenium (Al-Se) batteries, which possess a high theoretical specific capacity of 1357 mA h g −1 , represent a promising energy storage technology. However, they suffer from significant attenuation of capacity and low cycle life due to the shuttle effect. To mitigate the shuttle effect induced by soluble selenium chloroaluminate compound that tends to migrate towards the negative electrode, a quasi-solid-state Al-Se battery was fabricated through the synthesis of a multi-aperture structure quasi-solid-state electrolyte (MOF@GPE) based on metal–organic framework (MOF) material and gel-polymer electrolyte (GPE). The high ionic conductivity (1.13 × 10 −3 S cm −1 ) of MOF@GPE at room temperature, coupled with its wide electrochemical stability window (2.45 V), can facilitate ion transport kinetics and enhance the electrochemical performance of Al-Se batteries. The MOF@GPE-based quasi-solid-state Al-Se batteries exhibit outstanding long-life cycling stability, delivering a high specific discharge capacity of 548 mA h g −1 with a maintained discharge specific capacity of 345 mA h g −1 after 500 cycles at a current density of 200 mA g −1 . The stable ion transmission and high ion transport kinetics in MOF@GPE can be attributed to the stable structure and permeable channel of MOF , which effectively captures the soluble selenium chloroaluminate compound and further restrains the shuttle effect, resulting in improved cycling performance.
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Miao He,Yuting Xie,Jie Ni,Yan Jian,Shaoyi Song,Hebin Bao,Xuzhong Zeng,Xueming Li,Qihui Wang
In this study, Al/CuO energetic materials with high exothermic properties were prepared by electrophoretic deposition of nano-Al and CuO microboxes on Ti sheets. The microstructure and phase composition of Al/CuO energetic materials were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrophoretic deposition behavior of nano-Al and CuO microboxes were systematically investigated, and the electrophoretic deposition process was controlled by diffusion. The differential scanning calorimetry results showed that the maximum heat released by Al/CuO energetic material is 3049 J/g at an equivalent ratio of 3.0. The combustion properties of Al/CuO energetic materials were tested by optical fiber spectra. When the equivalence ratio was 2.25, the intensity of the spectra of Al/CuO energetic materials were the strongest and the lowest color temperature was 2916 K. This work provides a reference for the preparation of highly exothermic Al/CuO energetic materials by electrophoretic deposition.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 33
·24986-24994
·
IF 2.779
Cheng Li-Qian,Jiang Guozheng,Ma Zhenhua,Xu Ze,Yu Minghao,Lu Jingtong,Chen Kai
Al-doped BaZr 0.2 Ti 0.8 O 3 (BZT20) ceramics were prepared by solid-state sintering, and the relaxation degree of phase transition was tailored effectively. The microstructure, dielectric properties, ferroelectric properties, and electrocaloric (EC) performance of Al 2 O 3 -doped BZT20 ceramics were studied, respectively. The results show that Al 2 O 3 doping induces changes in Curie temperature and dielectric properties. When the additive amount of Al 2 O 3 is 1.25 at.%, the Curie temperature drops to around room temperature (RT), and the dielectric loss is lower than that of pure BZT20 ceramics. The diffusion constant γ reaches a minimum value of 1.57 when the Al 2 O 3 content is 1.25 at.%, indicating that a relatively large latent heat would be gathered while there is a phase transition. As a result, an enhanced EC response of ∆ T max = 0.293 K near RT is obtained when the Al 2 O 3 content is 1.25 at.%, which is 1.6 times that of pure BZT20. It is also impressive that a wide working temperature range can be obtained, that is, T span = 73 K for BZT20 ceramics with 1 at.% of Al 3+ ionic content.
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DOI
高影响因子
MEASUREMENT SCIENCE and TECHNOLOGY
·
2022
·Vol. 34
·期 2
·025106
·
IF 2.398
Qianchun Zhang,Qin Zhou,Yun Wu,Yanxin Li,Fengling Tian,Shan Tang,Li Jiang
In this study, MIL-53(Al) and Sb2SnO5 were synthesized by hydrothermal and precipitation methods, respectively. The doped MIL-53(Al)/Sb2SnO5 showed excellent catalytic properties, specifically for selectivity and sensitivity for isobutanol (IBN). To assess the catalytic properties of MIL-53(Al)/Sb2SnO5, an IBN gas sensor based on cataluminescence of MIL-53(Al)/Sb2SnO5 was developed, and it demonstrated detection of IBN with high sensitivity, high specificity, fast detection, and good stability. The signal response and recovery time of IBN gas sensor were 0.5 s and 6 s, respectively, and a good linear relation was 0.050–2.5 μg ml−1 (R2 = 0.9956) with a low detection limit of 0.015 μg ml−1. Further, the IBN sensor applied in the detection of real samples had satisfactory recoveries (90.0%–108%) with relative standard deviations of 3.2%–6.7%. The developed sensor based on MIL-53(Al)/Sb2SnO5 has great prospects for the practical detection of IBN gas in the fields of environmental analysis, safety monitoring, etc.
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高影响因子
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