CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Juan Xi,Guohua Chen,Fei Liu,Fei Shang,Jiwen Xu,Changrong Zhou,Changlai Yuan
In view of lead-free low-softening CuO–ZnO–B 2 O 3 –Li 2 O glass, novel glass/Al 2 O 3 ceramic composites were prepared by solid-state reaction route for ultra-low temperature co-fired ceramic (ULTCC) applications. The phase evolution and compositions, microstructure and microwave dielectric properties of the composites were studied by XRD , SEM and dielectric property measurement. Four phases including Cu 2 Al 6 B 4 O 17 , Li 2 CuB 4 O 8 , CuB 2 O 4 and Al 2 O 3 coexist in the glass/Al 2 O 3 ceramic composites sintered in the range of 640–660 °C. However, the contents and types of the phases depend on the composition of the composites and firing temperature. The optimum properties with a permittivity ε r = 3.79, a quality factor Q × f = 38557 GHz (at 16.64 GHz) and a temperature coefficient of resonance frequency τ f ≈0 ppm/ o C as well as a heat conductivity λ = 1.46W(mK) −1 can be achieved for the glass/ceramic composite containing 10 wt% Al 2 O 3 sintered at 640 °C. Moreover, the composite can be co-fired compatible with Ag and Al electrodes.The as-prepared glass/Al 2 O 3 ceramic composites are promising candidate for ULTCC application.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 4
·2306399
·
IF 19
Haoyang Jiang,Junqing Liu,Bin Tang,Zhendong Yang,Xinghui Liang,Xinyu Yu,Yirong Gao,Jinping Wei,Zhen Zhou
The practical implementation of garnet-type solid electrolytes, such as Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO), faces the significant challenge of Li dendrites. Though artificial interfacial strategies are effective in dendrite suppression, further investigation is needed to understand the mechanism of homogeneous Li deposition and its practicability under real-world conditions. Herein, a bilayer interface is constructed to address these issues. Such a bilayer interface consists of one conformal Li 2 O-rich layer, generated by rubbing LLZTO pellets inside molten Li with low-dose In 2 O 3 , and another Li 2 O layer deposited through atomic layer deposition (ALD). The regulatory effect of the initial Li 2 O-rich layer on achieving uniform Li deposition is explored, and the critical current density is enhanced to 2.4 mA cm −2 . However, simple interfacial strategy is insufficient to prevent anodic degradation for cycling at room temperature without stack pressure, leading to increased current leakage and directly reducing Li + within the electrolyte. After insulating it with a second ALD-Li 2 O layer that minimally hampers ionic conduction, the Li/Li symmetric cells achieve long cycling life exceeding 1000 h at 0.5 mA cm −2 and maintain stable operation even at 2 mA cm −2 . This work provides valuable insights for interfacial strategies towards practical solid-state batteries.
研究领域:
材料科学
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电化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xuelian Fu,Chaoqun Shang,Guofu Zhou,Xin Wang
Li is attractive anode for next-generation high-energy batteries. The high chemical activity, dendrite growth, and huge volume fluctuation of Li hinder its practical application. In this work, a Li–BiOF composite anode (LBOF) is obtained by combining Li metal with BiOF nanoplates through facile folding and mechanical cold rolling. Further, Li 3 Bi/LiF/Li 2 O filler is formed by the in-situ reactions of BiOF with contacted Li. In the filler, the Li 3 Bi, with high ionic conductivity and a lithiophilic nature, provides a mutually permeable channel for Li + diffusion. The low surface diffusion energy barrier of Li 3 Bi and LiF can further promote the uniform deposition of Li. The conductive lithiophilic filler can reduce the local current density and provide a spatial limitation to the deposited Li. Consequently, the symmetrical LBOF||LBOF cell can cycle stably at 1 mA cm −2 for over 1300 h. Additionally, the surface of LBOF is flat with suppressed dendrite formation and free of dead Li accumulation, and the change in electrode volume is significantly alleviated. Furthermore, the LBOF||LiFePO 4 full battery can maintain a stable cycle of more than 200 times with high capacity retention of 88.7% in a corrosive ester-based electrolyte. This simple mechanical approach is compatible with the current industrial route and is inspiring to solve the long-standing lithium-dendrite problem.
研究领域:
材料科学
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电化学
·
电池技术
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Shuo Tian,Hao Yang Shen,Jun Jie Huang,Hao Zhang,Kai Ge Liu,Bin He,Jianwei Zhao,Ling Bing Kong
When preparing glass-ceramics using sintering method, porosity is the main reason affecting their properties. To achieve glass-ceramics with low thermal expansion performance, cold isostatic pressing is adopted to significantly reduce the porosity. In this study, we systematically analyzed the effect of CaF 2 /CaO content on sintering behavior, microstructure and properties of Li 2 O–Al 2 O 3 –SiO 2 (LAS) glass-ceramics. It was found that the [CaF 2 ]/([CaO]+[CaF 2 ]) ratio x can be used to regulate the coefficient of thermal expansion (CTE) of the LAS glass-ceramics. The optimized sample has a CTE of 2.2865 ppm/°C, which is compatible with that of silicon (2.5 ppm/°C). At the same time, low dielectric constant (5.95 ≤ ε r ≤ 8.89) and dielectric loss (1.179 × 10 −3 ≤ tanδ ≤2.871 × 10 −2 ) were observed, which makes them a promising candidate for low-temperature co-fired ceramic substrate applications.
研究领域:
材料科学
·
陶瓷工程
·
电气工程
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Zhimin Hao,Dapeng Liu,Xintao Zuo,Haohan Yu,Yu Zhang
Modification of three-dimensional (3D) carbon hosts with metal oxides has been considered as advantageous for the formation of Li 2 O-rich solid electrolyte interface (SEI), which can show fast Li + diffusion, and meanwhile alleviate dendrite problems caused by fragility and nonuniformity of native SEIs. However, the lack of convincing experimental evidence has made it difficult to unveil the true origin of oxygen in Li 2 O-rich SEIs until now. Herein, CoO x embedded carbon nanofibers (CNF-CoO x ) are successfully prepared as high-performance Li anode hosts. By employing 18 O isotope labeling, the role of CoO x during SEI evolution is elucidated, revealing that CoO x contributes significantly to Li 2 O formation by delivering oxygen. Benefiting from the rich Li 2 O content, the as-formed SEIs greatly improve the Li + migration kinetics, and therefore, the CNF-CoO x @Li anode can exhibit excellent cycling stability in half, symmetrical, and full cells.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACTA MATERIALIA
·
2025
·
IF 9.3
Heng Wu,Hongming Tan,Shijie Wu,Jiajia Wang,Yuting Li,Li Yang,Xupeng Xu,Jincang Su,Guobao Xu,Jianyu Huang,Qi Luo,Yunxiao Wang,Beibei Xu,Yaru Liang,Gang Wang
Lithium metal anode is regarded as the “holy grail” of anode materials for Li-metal batteries (LMBs) because of its ultrahigh-specific capacity. However, the uncontrollable growth of “hostless” Li dendrite in the Li anode has a vital impact on its practical applications. Herein, the ultra-lightweight 3D carbon fiber is proposed to construct a Li metal anode via molten Li infusion with the aid of ZnO nano-coral. The atom probe tomograph (APT) manifests that the Li can be doped into Zn at the atomic scale and form Li 2 O on ZnO nano-coral, realizing a strong lithiophilic interface for uniform Li deposition. The in-situ TEM and DFT calculation confirms that the formed LiZn/Li 2 O not only acts as nucleation sites for lowering the Li diffusion barrier but also improves interfacial ionic conductivity for homogenizing Li-ion flux. As a result, the Li 2 O@LiZn-LCF@Li anode exhibits excellent cycle stability over 400 h under ultrahigh Li utilization of 70.7 %. The full cell paired with LiFePO 4 delivers a high discharge capacity of 142.9 mAh g −1 and maintains a high-capacity retention of 93.3 % after 100 cycles under a harsh condition of low N/P (2.08). The strategy provides a broad prospect for developing composite metal anodes in practical high-energy-density LMBs.
研究领域:
储能
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材料科学
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电化学
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纳米技术
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 6
·509
·
IF 2.8
Li Chang,Fu Zhifen,Chen Chen,Cheng Qing
In this paper, Li 2 O–MgO–TiO 2 (1: x :1, x = 1, 2, 3, 4 and 5) ceramic systems were prepared by solid-state reaction sintering. The effects of extra magnesium content on the phase evolution, crystal structure and microwave dielectric characteristics of Li 2 O–MgO–TiO 2 ceramics were systematically investigated. The Li 2 MgTi 3 O 8 , Li 2 Mg 3 TiO 6 , and (Li 2 TiO 3 ) 10.667 coexisted at x = 1 and 2. When x augmented to 3, the pure Li 2 Mg 3 TiO 6 -like phase was obtained with the increase of magnesium content. All specimens showed porous structure and clear grain boundaries. The microwave dielectric characteristics are extraordinary dependent on chemical component and densification. The Li 2 O–4MgO–TiO 2 ceramics sintered at 1350 °C possessed preeminent comprehensive performance of ε r = 13.95, Q × f = 119,072 GHz and τ f = − 40.9 ppm/°C.
研究领域:
材料科学
·
陶瓷
·
微波介质
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yuan Sun,Jie Wu,Yue Zhang,Linjing Liu,Jinpeng Ma,Yulin Yang,Bin Yang
BaTiO 3 -based piezoelectric ceramics have emerged as highly promising candidates for various applications, due to their excellent piezoelectricity. In this work, the [001] C textured Ba 0.97 Ca 0.03 Ti 0.96 Sn 0.04 O 3 piezoelectric ceramics were synthesized using the templated grain growth (TGG) method with the assistance of ZnO and Li 2 O. The effects of ZnO and Li 2 O on microstructure evolution, phase structure, texture development and piezoelectric properties were investigated systematically. Both ZnO and Li 2 O exhibit a pronounced promoting effect on oriented BCTS grain growth, enabling the achievement of a high texture degree F 001 of 98% at a relatively low sintering temperature of 1325 °C. The highly textured BCTS ceramics with Li 2 O exhibit to a substantial enhancement in piezoelectric performance: maximum strain S m , the piezoelectric coefficient d 33 and the figure of merit d 33 · g 33 reach 0.25%, 576 pC/N and 28.7 × 10⁻¹ ² m²/N, respectively. The highly preferred [001] C orientation, coexistence of O + T phases, and optimized ferroelectric domain structure synergistically contribute to the significant piezoelectric property enhancement. These results demonstrate the great potential of environmentally friendly textured BCTS-based ceramics for applications in piezo-sensors and energy harvesters.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hongcheng Yang,Qingyu Wen,Enzhu Li
Lithium borosilicate (LBS) and lithium fluoride (LiF) are verified to be effective sintering aids for CaAl 2 B 2 O 7 microwave dielectric ceramic to reduce the sintering temperature and lower the activation energies . Benefiting from the liquid phase sintering , low-firing, low permittivity and low-loss CaAl 2 B 2 O 7 microwave dielectric composite has been successfully obtained. Typically, CaAl 2 B 2 O 7 assembled with 1 wt % LBS composite possesses desirable properties of ε r = 5.91, Q × f = 39,443 GHz, τ f = −23.51 ppm/°C (@16.53 GHz). For composite ceramics with 0.5 wt % LiF, the optimal microwave dielectric properties are ε r = 6.08, Q × f = 37,295 GHz, τ f = −22.39 ppm/°C (@15.78 GHz). The two kinds of composite are densified at 875 °C, with co-existed CaB 2 O 4 and liquid phase. The mechanism underlying the low temperature sintering is revealed by well-matched wettability and lower activation energy of composite ceramics with additions.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2013
·
IF 2.046
Yiqiu Li,Yang Cao,Xiangxin Guo
The lithium garnet ceramic has been considered as one of promising solid-state electrolytes for secondary lithium batteries . However, improvement of its ionic conductivity is hindered by the high porosity related to the severe volatilization of lithium components during sintering. In order to find the solution for this problem, Li 2 O additives in concentration of 2–8 wt.% were introduced into the cubic Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 (LLZTO) at the solid-state reaction processes. It is found that the Li 2 O additives lead to formation of glassy-like phases at the grain boundaries related to the liquid-phase sintering behavior, which eliminates the residual pores therein and increases the relative density from 91.5% to 97.3%. Measurement of conductivity indicates that 6 wt.% is the optimum concentration of Li 2 O which leads to an ionic conductivity of 6.4 × 10 − 4 S cm − 1 at room temperature . This value is approximately 3 times larger than that of the ceramic without the additive.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jiabin Fang,Jianguo Li,Lijun Qin,Aidong Li,Hao Feng
Silicon-based materials are of long-standing interest as the anodes for next-generation lithium-ion batteries, yet their low initial Coulombic efficiency and poor interfacial stability are lethal limitations. In this work, we used atomic layer deposition (ALD) and molecular layer deposition (MLD) techniques to fabricate a lithium-containing laminated Li2O–lithicone hybrid film (∼5 nm) on a silicon electrode. The laminated film provides an additional surface Li source around silicon cores, which can partially reimburse the Li loss during battery cycling. Characterization of interfacial components shows that such a laminated Li2O–lithicone interface undergoes gentle element changes and participates in a hybrid solid electrolyte interphase with Li2CO3, Li2O, LixPOFy, and LiF species. Finite element model analysis and morphology characterization demonstrate that the laminated structure design can help relieve the interfacial stress and thus retain the integrity and reactivity of the silicon composite anode during cycling. Moreover, the lithium-based laminated film leads to a fast Li+ migration kinetics on the surface of the electrode as revealed by the galvanostatic intermittent titration technique and density functional theory calculation. Benefiting from the above merits, a silicon anode with a 91.2% initial Coulombic efficiency, a rate performance of 1460 mA h g–1 at 2 A g–1, and a reversible capacity over 646 mA h g–1 after 850 cycles was achieved. This work exemplifies the advantages of lithium-based hybrid films precisely engineered by ALD/MLD techniques for improving performances of advanced silicon anode batteries and deepens understandings on the mechanism of interfacial stability and reaction kinetics.
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
International Journal of Applied Ceramic Technology
·
2022
·Vol. 20
·期 1
·321-328
·
IF 2.328
Xing Xiang,Zecheng Fang,Xibei Wang,Zhenzhen Zhao,Haojun Zhang,Yu Zhang
Li 7 La 3 Zr 2 O 12 is a promising material used as solid electrolyte in all-solid-state lithium batteries. However, the lithium ionic conductivity of LLZO is limited, and the cycling stability of lithium symmetric battery based on LLZO is not good. In this research, different Ga-doped LLZO samples were prepared by adding different excess amounts of Li 2 O, and the effect of excess amount of Li 2 O on the structure and performance of LLZO have been researched. The results show that with the rise of the amount of Li 2 O, the lithium ionic concentration increases gradually, and the lithium ionic conductivity and the ratio of grain resistance to total resistance rise first and then drop. When the excess amount of Li 2 O is 10 wt.%, the sample exhibits the highest lithium ionic conductivity of 1.36 mS/cm, and the lithium symmetric battery exhibits the most stable operation.
研究领域:
材料科学
·
电化学
·
储能
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）