APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2025
·Vol. 131
·期 5
·1-10
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IF 2.8
Ye Huihua,Lin Jinfeng,Wang Xusheng
Three types of CaAl 2 O 4 :Li + phosphors singly doped with Eu 3+ , Sm 3+ , and Ho 3+ ions were synthesized using high temperature solid-state reaction method, and the effects of rare-earth ions and doping concentration on the crystal structure, thermal stability and luminescence properties were systematically studied. The XRD patterns show that all Ca 1 − x Al 2 O 4 :0.01Li + , x Re 3+ (Re = Eu, Sm, Ho) phosphors are pure monoclinic CaAl 2 O 4 phase. And these phosphors can be effectively excited by the characteristic excitation wavelength of the corresponding rare earth ions. Notably, when the doping concentration is less than 15 mol%, the corresponding luminous intensity increases monotonically with the increase of Ho 3+ , while the optimal doping amounts for Eu 3+ and Sm 3+ are 9 mol% and 1 mol%, respectively. Additionally, comparative analysis revealed superior energy transfer efficiency from the matrix to the luminescent center in the CaAl 2 O 4 :0.01Li + , Eu 3+ relative to Sm 3+ and Ho 3+ counterparts. More importantly, the Ca 0.91 Al 2 O 4 :0.01Li + , 0.09Eu 3+ phosphors also exhibit excellent thermal and ageing stability. Its luminous intensity exhibited minimal deviation (< 16%) across an extended temperature range (208 ~ 448 K). Furthermore, after 320 h of thermal aging at 100 °C, the sample retained over 98% of its initial fluorescence intensity. This study provides theoretical and experimental basis for the development of CaAl 2 O 4 -based phosphors for solid-state lighting devices.
研究领域:
材料科学
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光电子学
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固态照明
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无机化学
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应用物理学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 25
·14534-14544
·
IF 12.732
Fei Shen,Zhongti Sun,Liang Zhao,Yuanhua Xia,Yanyan Shao,Jingsheng Cai,Shuo Li,Chen Lu,Xiaoling Tong,Yu Zhao,Jingyu Sun,Yuanlong Shao
Developing high energy density and high-power density electrode materials is of great importance for lithium-ion batteries to satisfy the requirements of the customer market. We report that introducing Mo into Nb2O5 at a low temperature leads to phase transition from bronze-phase T to crystallographic shear-phase H. The resulting Nb1Mo0.1O2.8 exhibits higher energy density than T-Nb2O5 and improved rate-performance and cycling-stability compared to H-Nb2O5. Neutron diffraction was applied to Nb1Mo0.1O2.8 to characterize the structure and two-phase ratios of the mixed metal oxide together with the first-principles method to calculate the possible Mo substitution sites. The Nb1Mo0.1O2.8 anode displays intrinsic pseudocapacitive lithium-ion intercalation with a high energy density of 362 mA h g−1 at 0.2C. In situ XRD results suggest that Nb1Mo0.1O2.8 is able to intercalate more lithium ions with smaller structure expansion compared with H-Nb2O5; furthermore, a computational method reveals that the introduction of Mo into the oxide increases Li atom adsorption energies and decreases the diffusion barrier. Therefore, Nb1Mo0.1O2.8 is a promising anode material for high-capacity and high-rate lithium-ion energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yijing Zhang,Si Sun,Ming Wang,Xuan Luo,Zhehua Jia,Jiaoyu Peng,Shenzhen Cong,Tao He,Huan Pang
Developing high-precision ion-selective membranes remains critical for sustainable lithium extraction, especially from brines with high Mg 2+ /Li + ratios. Metal-organic framework (MOF) membranes with tunable pore architectures hold great promise for Mg 2+ /Li + separation, but combining selective adsorption with ion sieving effects for efficient ion separation remains challenging. Here, we fabricate a defect-free UiO-66-4F polycrystalline membranes on polyethylene terephthalate (PET) substrates by in-situ growth. The fluorine-functionalized sub-nanochannels synergistically combine selective Li + adsorption and size exclusion mechanisms, where electronegative F group enhances Li + affinity while the angstrom-scale pores impose steric hindrance on hydrated Mg 2+ . The dual mechanism amplifies the permeation difference between Li + and Mg 2+ transport, achieving an exceptional Mg 2+ /Li + separation factor of 283 alongside high monovalent ion permeation rates (0.16 mol·m −2 ·h −1 ) under an applied electric potential difference. This study presents a flexible approach for the design and fabrication of ion-separation membranes that are both highly permeable and selectively efficient, achieved through the integration of size sieving and binding affinity interactions.
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产品关联
DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Runhe He,Hao Liu,Qing Gao,Dong Cai,Kuikui Xiao,Yinhang Zhang,Xinmin Zhang,Xianyang Cheng,Yuhui Wang,Lixing Kang,Huagui Nie,Yatao Liu,Zhi Yang
Sulfurized polyacrylonitrile (SPAN) represents a highly promising cathode material for lithium–sulfur (Li–S) batteries, leveraging a solid-solid sulfur conversion mechanism. However, persistent interfacial side reactions and sluggish redox kinetics in SPAN cathodes compromise the electrochemical performance. Here, quaternized chitosan (QCS) is employed as a functional agent to stabilize the SPAN cathode electrolyte interphase (CEI). The positively charged quaternary ammonium groups selectively adsorb PF 6 – anions, modifying the Helmholtz layer structure and facilitating the formation of an anion-derived CEI enriched with LiF. Consequently, the SPAN@QCS-1.0% cathode delivers a high discharge capacity of 1499 mAh g −1 at 0.2 C, an outstanding rate capability of 902 mAh g −1 at 10 C, and a prolonged cycle life exceeding 1500 cycles at 1 C. Under practical conditions of high sulfur loading (12.0 mg cm −2 ) and lean electrolyte (E/S ratio = 5 µL mg −1 ), the SPAN cell achieves a high areal capacity of 17.1 mAh cm −2 , surpassing that of conventional lithium–ion batteries (≈4 mAh cm −2 ) by more than fourfold. Furthermore, a 0.9 Ah pouch-cell prototype demonstrates stable cycling for over 30 cycles. The interface strategy provides a facile and effective approach to developing high-performance SPAN-based Li–S batteries.
研究领域:
电化学
·
储能
·
材料科学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
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
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Zhengyi Huang,Mengmeng Jia,Yanna Wu,Haojie Chen,Shuming Li,Zong Lu,Yanying Wei,Haihui Wang
Nanofiltration (NF) membranes with sub-nano structure are promising for the extraction of lithium from brine resources, yet often face a trade-off between separation efficiency and permeation rate. Here, the ultrathin nanocomposite membranes (TFN AM ) with high Li + /Mg 2+ selectivity and permeability are prepared by introducing the positive aminated-MXene interlayer in the process of interfacial polymerization (IP). This interlayer modulates the diffusion behavior of amine monomers and reduces the thickness of the polyamide (PA) layer by six times; meantime, it provides excellent positive charge on the membrane surface. The aminated-MXene interlayer endows the high positive charge density of TFN AM enhancing the Donnan exclusion effect on the improvement of Li + /Mg 2+ selectivity. As a result, the TFN AM exhibits a high permeability of 12.5 L m −2 h −1 bar −1 and a Li + /Mg 2+ selectivity of 17.5, while maintaining performance over 100 h. This work proposes a facile and effective strategy to address the challenge of NF membrane limitations and advance lithium recovery technologies from brines.
研究领域:
材料科学
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膜技术
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分离科学
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纳米技术
·
可持续能源资源
✓ 已验证
产品关联
DOI
高影响因子
Functional Materials Letters
·
2025
·
IF 1.1
Hanchen Xu,Zhiyong Yu,Lujia Tian,Suni Du,Yichun Zhao,Jingsai Cheng,Hanxing Liu,Zhongzhi Yuan
Copper fluoride (CuF 2 ) has demonstrated great potential as a cathode material for LIBs owing to its high energy density. In this study, a two-step synthesis method was proposed to prepare porous CuF 2 by using Cu-based metal-organic frameworks (MOFs). N 2 adsorption-desorption isotherms, along with SEM and TEM analyses, proved that the intermediates CuO exerted a certain influence on the pore structure of the final CuF 2 products. The porous CuF 2 achieved a first discharge capacity of 554 mAh ⋅ g − 1 at 0.1C. At a high current density of 5C, it delivered a rate capacity of 413 mAh ⋅ g − 1 within 1.5–4.2 V. The results of electrochemical impedance spectroscopy show that varying degrees of porosity influence the lithium-ion diffusion coefficient, leading to differences in electrochemical performances.
研究领域:
材料科学
·
电化学
·
储能
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Hong Li,Feng Shao,Xinzhu Wen,Yusen Ding,Chao Zhou,Yafei Zhang,Hao Wei,Nantao Hu
Developing scalable and facile techniques to design and construct unique structures of cathodes with high performance is challenging for the practical Li-S batteries. In this work, highly effective and scalable cathodes based on curved graphene/MXene bi-nanosheets-constituted fibers is demonstrated for long-lifetime Li-S batteries. Wet-spinning is introduced to design and fabricate sulfur cathodes based on graphene/MXene hybrid fibers, in which sulfur is uniformly distributed and intimately enveloped between graphene and MXene nanosheets. The high chemical affinity towards polysulfides enabled by MXene is demonstrated by experiments and density functional theory (DFT) calculations. The assembled cells show high sulfur utilization (the discharge capacity of 1483.1 mAh g −1 at 0.1 C), high rate performance (733.3 mAh g −1 at 2 C) and excellent long cycle stability (0.043% per cycle decay at 1 C over 1000 cycles). Moreover, a reversible areal capacity of 5 mAh cm −2 is achieved under a high sulfur loading of 5.6 mg cm −2 , revealing its great potential for practical applications. This study gives a valuable guidance to design advanced sulfur cathodes for high-performance Li-S batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 44
·2509658
·
IF 19
Chaoqiang Tan,Zeyu Shen,Shichao Zhang,Zhijun Wu,Shengnan He,Hongge Pan,Hao Cheng,Yingying Lu
Sulfurized polyacrylonitrile (SPAN) recently emerges as a prospective cathode for lithium–sulfur (Li–S) batteries owing to its high S utilization, remarkable cycling stability, and liberty from shuttle effect. Despite weakly solvating ether electrolytes exhibiting simultaneously compatibility for SPAN cathode and lithium (Li) anode, they universally suffer from low ionic conductivity and narrow liquid-phase temperature range. However, conventional ether-based electrolytes with excellent ionic conductivity cannot realize reversible solid–solid conversion of SPAN cathode due to Li polysulfide intermediates (LiPSs) dissolving and shuttling. Here, a series of weakly solvating ethers are evaluated by selectively methylating dimethoxymethane (DMM) to fine-tune their solvation capability and liquid-phase temperature range. Enlightened from weakly solvating ether electrolytes, the contact ion pair (CIP)-dominated electrolyte is designed for satisfactory ionic conductivity of electrolyte and reversible solid–solid conversion of SPAN cathode over wide temperature range. The reinforcement mechanisms of the CIP-dominated electrolyte for the Li anode and SPAN cathode are comprehensively elucidated through experimental characterizations and molecular dynamics simulations. Based on the optimized electrolyte, Li||SPAN full cells can steadily operate over wide temperature range from −20 to 60 °C. Furthermore, the 120 mAh Li||SPAN pouch cell can exhibit 85.5% capacity retention after 45 cycles at 0.2 C.
研究领域:
电化学
·
能源材料
·
锂离子电池
·
电极界面化学
·
电解质工程
·
分子动力学模拟
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Xie Yuxiang,Huang Yixin,Zhang Yinggan,Wu Tairui,Liu Shishi,Sun Miaolan,Lee Bruce,Lin Zhen,Chen Hui,Dai Peng,Huang Zheng,Yang Jian,Shi Chenguang,Wu Deyin,Huang Ling,Hua Yingjie,Wang Chongtai,Sun Shigang
The Li metal is an ideal anode material owing to its high theoretical specific capacity and low electrode potential. However, its high reactivity and dendritic growth in carbonate-based electrolytes limit its application. To address these issues, we propose a novel surface modification technique using heptafluorobutyric acid. In-situ spontaneous reaction between Li and the organic acid generates a lithiophilic interface of lithium heptafluorobutyrate for dendrite-free uniform Li deposition, which significantly improves the cycle stability (Li/Li symmetric cells >1200 h at 1.0 mA cm −2 ) and Coulombic efficiency (>99.3%) in conventional carbonate-based electrolytes. This lithiophilic interface also enables full batteries to achieve 83.2% capacity retention over 300 cycles under realistic testing condition. Lithium heptafluorobutyrate interface acts as an electrical bridge for uniform lithium-ion flux between Li anode and plating Li, which minimizes the occurrence of tortuous lithium dendrites and lowers interface impedance.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
SOLID STATE IONICS
·
2016
·
IF 2.38
Qingsong Wang,Jing Guo,Tian Wu,Jun Jin,Jianhua Yang,Zhaoyin Wen
A carbon coating layer facing sulfur cathode is introduced on one side of the solid state ionic conductor in the ceramic-liquid hybrid electrolyte based Li-S cell. Both the cycling performance and the rate capability are improved as a result of enhanced electron transport for the conversion of the dissolved sulfur-containing active materials as well as the wettability of the ceramic electrolyte towards the liquid electrolyte . The interface modified hybrid Li-S cell exhibits an initial discharge capacity of 1409 mA h g − 1 and remains at 1000 mA h g − 1 which is 235 mA h g − 1 higher than the pristine one, after 50 cycles at 0.2C rate.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Yan Wang,Ruitian Guo,Wei Liu,Linghua Zhu,Weibo Huang,Wei Wang,Honghe Zheng
Co 3 O 4 with high theoretical capacity and easily controllable structure attracts significant attention as the anode material for lithium-ion battery. In this work, Co 3 O 4 nanocubes, nanospheres and nanosheet clusters are prepared through a solvo-thermal procedure by altering the solvent compositions . When used as the anode material for lithium-ion battery, Co 3 O 4 nanospheres with a diameter of 500–800 nm composed of highly interconnected nanoparticles with 30 nm in diameter exhibit the optimal electrochemical performances. It exhibits an ultrahigh specific capacity of 1455 mAh g −1 at 0.2C. When the discharge current density increases 50 times, the electrode still delivers a specific capacity of 743 mAh g −1 . And it retains a high discharge capacity of 1262 mAh g −1 after 100 cycles at 0.1C. The relatively high specific surface area and porosity, as well as the stable structure, compactness of the solid electrolyte interphase film formed on the electrode are found to be the main factors for the excellent lithium storage performance of Co 3 O 4 nanospheres.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）