Carbon Capture Science & Technology
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2022
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IF 0
Weiyang Yuan,Tao Deng,Shuzhen Chen,Yong He,Changlei Qin
High-temperature CO 2 adsorption is an important method in reducing the excessive CO 2 emissions for the mitigation of global climate change. As a potential high-temperature CO 2 sorbent, Li 4 SiO 4 attracted extensive concern due to its high CO 2 capacity with excellent stability. However, gas impurities in industrial flue gas, especially SO 2 affect the CO 2 adsorption process, and the competition between SO 2 and CO 2 during the adsorption process by Li 4 SiO 4 is lack of understanding. This work studied the competitive behavior between carbonation and sulfation through experimental tests, characterizations, and DFT calculations. Results show that carbonation can slightly inhibit the proceeding of sulfation while sulfation almost prevents the occurrence of carbonation for both Li 4 SiO 4 and K-Li 4 SiO 4 . In addition, the doping of K 2 CO 3 in Li 4 SiO 4 is observed to significantly promote both the carbonation and sulfation process. Furthermore, stable adsorption structures of CO 2 and SO 2 on Li 4 SiO 4 were obtained via DFT calculation, which verifies the mutual inhibition between carbonation and sulfation. These results provide a well understanding of the competition between carbonation and sulfation of Li 4 SiO 4 -based sorbents, and are helpful for the design and optimization of CO 2 adsorption process.
研究领域:
材料科学
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环境工程
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化学工程
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碳捕集与封存
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DOI
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Ke Wang,Feng Gu,Peter T. Clough,Youwei Zhao,Pengfei Zhao,Edward J. Anthony
Lithium orthosilicate (Li 4 SiO 4 ) represents a potential class of high-temperature sorbents for CO 2 capture in power plants and sorption enhanced methane reforming to produce H 2 . However, conventional wisdom suggests that pure Li 4 SiO 4 should have extremely slow sorption kinetics at realistic low CO 2 concentrations. Here, we report the opposite result: using a simple and cost-effective glucose-based mild combustion procedure, an unusually efficient and pure form of Li 4 SiO 4 (MC-0.6) was synthesized to achieve a maximum uptake capacity of 35.0 wt% at 580 °C for CO 2 concentrations under 15 vol% and maintained this capacity over multiple cycles. The characterization results showed that highly porous nano-agglomerate-like (50–100 nm) morphologies were apparent and ensured a rapid surface-sorption of CO 2 . In this process, a macroporous nano-sized Li 2 SiO 3 cover on the melt layer of Li 2 CO 3 was identified for the first time. This special structure appeared to accelerate the transportation of CO 2 and the diffusion of Li + and O 2− through a molten layer enhancing contact with CO 2 . Thus, the sample MC-0.6 reduced both the surface-sorption and diffusion kinetics dependence on low CO 2 concentrations. Rather than use traditional approaches (controlled morphologies combined with doping), we have demonstrated that the slow kinetics can be overcome simply by a controlled morphologies strategy, which opens up a new direction for the synthesis of high-performance Li 4 SiO 4 sorbents.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
FUSION ENGINEERING AND DESIGN
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2021
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IF 1.453
Maoqiao Xiang,Jie Zheng,Shaofu Li,Chaoquan Hu,Jingyi Cui,Yingchun Zhang,Qiang Qi,Fen Yue
Lithium-based ceramic tritium breeders would attack the blanket structural materials and produce brittle corrosion layers, causing potential safety hazard. Herein, coated breeders were proposed as advanced tritium breeders to address the issue. Carbon (C), titanium nitride (TiN) and titanium carbide (TiC) were investigated as inert protective shells because they show excellent stability and chemical compatibility with Li 2 TiO 3 and Li 4 SiO 4 . Moreover, for the first time, the C and TiN coated Li 2 TiO 3 and Li 4 SiO 4 pebbles were successfully fabricated by fluidized bed chemical vapor deposition (FBCVD) process, which would significantly decrease the brittle corrosion layers and increase the safety. The deposition behavior and interface reactions were systemically investigated.
研究领域:
核能科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2018
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IF 3.057
Yichao Gong,Zhong Chen,Mao Yang,Hailiang Wang,Chen Dang,Wanxia Huang,Tiecheng Lu
Li 4 SiO 4 has been widely studied as attractive tritium breeding materials due to its innate merits. Considering the potential advantages of nanostructure in tritium breeding materials, a distinctive process was developed to obtain nanostructured Li 4 SiO 4 pebbles. In brief, ultrafine precursor powders were synthesized by solvothermal method without using surfactants , and then indirect wet method was adopted to generate the green spheres with homogeneous microstructure. After that, the suitable sintering conditions were defined by studying the effects of sintering parameters on the grain size evolution, and nanostructured Ti-doped Li 4 SiO 4 pebbles were first obtained by two-step sintering method. This study will be expected to provide references for fabricating other Li-based tritium breeding materials.
研究领域:
核能科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Xin Luo,Weilong Ren,Huanhuan Xing,Muhammad Irfan Hussain,Qumail Arshad,Yuzeng Li,Zhiyuan Liu,Changyong Liu,Zhangwei Chen
Vat photopolymerization 3D printing technique enables the precise fabrication of ceramic components with highly complex shapes and improved performance. It has been used for the preparation of Li 4 SiO 4 ceramic units, which are a promising candidate for stable tritium breeding in fusion reactions. In order to further enhance the production properties, herein metal oxide additions are proposed to combine with the previously reported generative shaping and material-forming (GSM) strategy. A remarkable theoretical density of 92.8 % and crushing load of 38.54 N reveal the effectiveness of this approach in producing robust ceramic units potentially suitable for tritium production. The study is proved to be cost-effective, highly efficient in production and most importantly to be able to produce high-performance Li₄SiO₄-based tritium breeding ceramics. Our findings provide a new insight into lithium-based tritium breeders preparation and applications, supporting their potential in fusion energy.
研究领域:
材料科学
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核能工程
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先进制造
✓ 已验证
产品关联
DOI
高影响因子
Carbon Capture Science & Technology
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2024
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IF 10.4
Pengfei Zhao,Ke Wang,Jie Hong,Edward J. Anthony
The reversible CO 2 absorption/desorption of lithium orthosilicate (Li 4 SiO 4 ) sorbents holds potential for high temperature capture of CO 2 from hot flue gases, sorption-enhanced reforming and solar thermochemical energy storage. In this study, we have prepared a series of Li 4 SiO 4 sorbents using a combination of K 2 CO 3 addition and dry ball-milling procedure to improve the relatively slow kinetics under low CO 2 partial pressure conditions. The synergistic effects of dry ball-milling and K 2 CO 3 addition on the intrinsic properties of Li 4 SiO 4 sorbents were explored by thermogravimetric analysis and structural characterizations. Thermogravimetric analysis indicate that the highest CO 2 uptakes were achieved with dry ball-milling combined with K 2 CO 3 physical addition. The structural characterizations further reveal that this sorbent (P-3K-1.5 M) had the smallest crystallite/particle size, largest surface area, and highest availability of surface alkaline-sites. The kinetics analysis also demonstrates that P-3K-1.5 M exhibited the fastest sorption kinetics during a double process. Additionally, P-3K-1.5 M maintained a high capacity over 10 sorption/desorption cycles. Therefore, this synthesis technique, which is simple, cost-effective, and easily scalable, shows great promise for high-temperature CO 2 capture.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2026
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IF 6
Siqi Guo,Wei Feng,Qingyuan Wang,Ruichong Chen
Advanced tritium breeder materials with high lithium density, robust mechanical strength, and fine grain size are prerequisites for the safe and efficient operation of fusion blankets. While Li 2 TiO 3 -Li 4 SiO 4 biphasic ceramics have been developed to balance the trade-offs between single-phase breeders, achieving rigorous control over microstructure stability at elevated temperatures remains a challenge. In this work, a dual-optimization strategy combining solid solution strengthening and biphasic compositing was proposed. Novel Li 2 (Ti,Zr)O 3 -Li 4 SiO 4 ceramic pebbles with various phase ratios (Ti/Si atomic ratio = 1:0.5, 1:1, and 1:2) were successfully prepared for the first time. The introduction of Zr into the Li2TiO3 lattice serves as a grain growth inhibitor, while the Li 4 SiO 4 phase enhances sinterability. The results indicate that pure-phase and well-crystallized powders can be obtained at 700 °C. Interestingly, the addition of Li 4 SiO 4 was found to hinder the phase transition of Li 2 (Ti,Zr)O 3 effectively. Benefiting from the synergistic effect, the pebbles sintered at 1000 °C exhibit a refined grain size of <2 μm, significantly smaller than that of traditional Li 4 SiO 4 -based ceramics. Meanwhile, a satisfactory relative density of ∼82 %T.D. and a high crushing load of >70 N were achieved due to the improved sinterability. This study demonstrates that the Li 2 (Ti,Zr)O 3 -Li 4 SiO 4 ceramic, which integrates the advantages of structural stability from solid solutions and mechanical robustness from biphasic composites, holds great promise as a high-performance tritium breeder.
✓ 已验证
DOI
高影响因子
APPLIED ENERGY
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2016
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IF 5.746
Ke Wang,Zhongyun Zhou,Pengfei Zhao,Zeguang Yin,Zhen Su,Ji Sun
A unique gluconic acid treatment coupled with a carbon coating process was used to synthesize Li 4 SiO 4 ceramics (GAC-Li 4 SiO 4 ) with superior performance for high-temperature CO 2 capture. The effects of different synthetic methods, carbonization temperatures, acid sources and acid contents on the performance of the sorbent were studied and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen absorption and thermogravimetric analyses. After the gluconic acid treatment and carbon coating, the GAC-Li 4 SiO 4 had a small crystal size, hollow morphology and enhanced pore features. Significant improvements in CO 2 sorption performance (i.e., low absorption temperature, fast absorption rate, and high capacity) were thus obtained. Moreover, the carbonization temperature, acid content and acid type greatly affected the morphology and chemisorption properties of the Li 4 SiO 4 sorbents. Under the optimized synthetic conditions, the maximum CO 2 absorption capacity was 34.7% after isothermal absorption at 665 °C for 10 min. This sorbent also maintained good cyclic properties.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Nano Energy
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2018
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IF 13.12
Jun-chao Zheng,Zhuo Yang,Zhen-jiang He,Hui Tong,Wan-jing Yu,Jia-feng Zhang
LiNi 0.8 Co 0.15 Al 0.05 O 2 (LNCA) is a highly promising cathode material for lithium-ion batteries, but the low-rate capability and poor cycling stability of LNCA limit the expansibility of its commercial applications. Herein, Li 4 SiO 4 with a small amount of Al is introduced to modify LNCA by combined wet-chemical and solid-state methods and improve its rate and cycle performance. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), High Resolution Transmission Electron Microscope (HRTEM), and Energy Disperse Spectroscopy (EDS) results confirm that a Li 4 SiO 4 coating layer (2–5 nm) is firmly wrapped on the LNCA surface. The modified LNCA shows surprising rate performance and excellent cycle retention. Specifically, the LNCA material coated with 3 mol% Li 4 SiO 4 displays a discharge capacity of 156.5 mAh g −1 at 10 C and exhibits a capacity retention of 88% after 100 cycles at 1 C rate(2.7–4.3 V). The excellent electrochemical performance of the LNCA@Li 4 SiO 4 is due to the incorporation of the Li 4 SiO 4 layer. This layer enhances the lithium-ion diffusion between electrode and electrolyte and suppresses the side reaction produced by direct contact between the active material and electrolyte during repeated charge–discharge cycles. All these findings indicate the high potential of this material for application in advanced lithium-ion batteries.
研究领域:
材料科学
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电化学
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储能
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Yichao Gong,Jiarui Li,Lin Liu,Zhaokun Li,Longchao Zhuo,Guojun Zhang
Multiphase composites of lithium ceramics have emerged as a prominent area of research in the development of advanced solid tritium breeding materials. In this study, Li 2 TiO 3 /Li 2 SiO 3 co-doped Li 4 SiO 4 ceramic pebbles were prepared through an in-situ reaction between Li 4 SiO 4 and TiO 2 . The objective of this study is to enhance the thermal cycling stability of Li 4 SiO 4 by impeding the grain boundary migration of Li 4 SiO 4 under high temperature conditions. The effects of the in-situ generated Li 2 TiO 3 /Li 2 SiO 3 particles on the microstructure, crush load and thermal cycling stability of Li 4 SiO 4 ceramic pebbles were investigated. The in-situ formed Li 2 TiO 3 and Li 2 SiO 3 particles effectively hindered the grain growth and minimized the formation of large intracrystalline pores in Li 4 SiO 4 . At a sintering temperature of 900 °C, the Li 2 TiO 3 /Li 2 SiO 3 particles are beneficial in increasing the crush load of Li 4 SiO 4 ceramic. However, at lower sintering temperatures, their impact was counterproductive. An increase in the volume fractions of the Li 2 TiO 3 /Li 2 SiO 3 had a positive effect on grain refinement but a negative effect on crush load. The Li 2 TiO 3 /Li 2 SiO 3 co-doped Li 4 SiO 4 ceramic pebbles exhibited excellent structural stability during thermal cycling. The optimum mechanical stability was achieved at a TiO 2 addition of y = 0.1. The in-situ generated fine second phase particles effectively impeded grain boundary migration at high temperatures, providing a viable strategy for improving the thermal stability of Li 4 SiO 4 tritium breeders.
研究领域:
材料科学
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核能工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Yanxia Yuan,Feng Wu,Yiran Liu,Xinran Wang,Ke Zhang,Lumin Zheng,Zhaohua Wang,Ying Bai,Chuan Wu
Lithium metal batteries (LMBs) are among the most promising candidates for high energy-density batteries. However, dendrite growth constitutes the biggest stumbling block to its development. Herein, Li4SiO4-dominating organic–inorganic hybrid layers are rationally designed by SiO2 surface modification and the stepwise prelithiation process. SiO2 nanoparticles construct a zigzagged porous structure, where a solid electrolyte interface (SEI) has grown and penetrated to form a conformal and compact hybrid surface. Such a first-of-this-kind structure enables enhanced Li dendrite prohibition and surface stability. The interfacial chemistry reveals a two-step prelithiation process that transfers SiO2 into well-defined Li4SiO4, the components of which exhibits the lowest diffusion barrier (0.12 eV atom–1) among other highlighted SEI species, such as LiF (0.175 eV atom–1) for the current artificial layer. Therefore, the decorated Li allows for an improved high-rate full-cell performance (LiFePO4/modified Li) with a much higher capacity of 65.7 mAh g–1 at 5C (1C = 170 mAh g–1) than its counterpart with bare Li (∼3 mAh g–1). Such a protocol provides insights into the surface architecture and SEI component optimization through prelithiation in the target of stable, dendrite-proof, homogenized Li+ solid-state migration and high electrochemical performance for LMBs.
研究领域:
材料科学
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电化学
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储能技术
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锂金属电池
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
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2015
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IF 2.605
Ke Wang,Zeguang Yin,Pengfei Zhao
A highly efficient lithium orthosilicate (CSG-Li 4 SiO 4 ) was synthesized using a sol–gel method combined with carbon coating. The presence of citric acid played dual roles, serving as a complexing agent that homogeneously mixed the precursors and as a carbon source, which effectively prevented the Li 4 SiO 4 crystallite from growing. The sorbent characteristics, CO 2 absorption capacity, and cyclic absorption–desorption properties of CSG-Li 4 SiO 4 were determined using X-ray diffraction, nitrogen absorption, scanning electron microscopy, thermogravimetric analysis and a fixed-bed reactor. Compared with two reference sorbents synthesized using the solid-state method and a simple sol–gel without carbon coating, CSG-Li 4 SiO 4 presented a loose shell-connected structure with higher purity, smaller grain size and larger specific surface area. This favorable structure was responsible for the sorbent׳s improved performance, as indicated by a higher capacity (a maximum absorption of 34.2 wt%), faster absorption kinetics and better stability.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）