Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xue-Ze Wang,Yang-Hai Zheng,Yun Xue,Yong-De Yan,Fu-Qiu Ma,Mi-Lin Zhang,Hai-Yun Bai,Zi-Qi Kou,Jian-Peng Liu
With the continuous development of the nuclear industry, there is an urgent need to find a method that can safely and efficiently dispose of spent resins. Molten salt oxidation (MSO) is a promising waste treatment technology . In this paper, the newly shipped resins were used to simulate the actual spent ion exchange resins . The destruction of the resins is mainly divided into three stages. The addition of oxygen can increase the activation energy ( E ) required for the reaction. Some solid residues which were proved to be amorphous carbon materials generated after MSO. In the high-resolution XPS spectra of C 1s, the C-S bond disappeared after MSO at 400 ℃ for 2 h proved the destruction of the sulfonic acid groups. The core-level scan XPS spectra of S 2p illustrated that sulfur and sulfonyl bridges were formed after sulfonic acid groups were destroyed. The infrared spectrum also showed that the sulfonic acid groups were destroyed at 400 ℃ to form sulfonyl structure, but sulfur bridges were not found due to its small IR absorptions. In this paper, the ternary eutectic Li 2 CO 3 -Na 2 CO 3 -K 2 CO 3 , can be operated efficiently at a relatively low temperature. The generated sulfur dioxide is captured by the carbonate to form sulfate. These merits make MSO become a promising and environmentally friendly approach for the treatment of sulfur-containing organic waste.
研究领域:
核工业废物处理
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Jixi Chen,Jinqing Jia,Mengyu Zhu
With an optimized dosage, hardening accelerators become a vital means of modifying fly ash-cement system (FAC). This study comprehensively investigated the mechanical properties of FAC modified by Li 2 CO 3 , Na 2 SO 4 , and triethanolamine (TEA) under different dosages, and optimized the dosage of accelerators through the response surface method (RSM). The synergistic effect of accelerators on the hydration of FAC was characterized by thermogravimetric differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The results demonstrated that the factors and response value followed a quadratic polynomial model. The regression coefficients R 2 of the model were all greater than 0.9, indicating good agreement with the experimental data. The content of Li 2 CO 3 and Na 2 SO 4 had an extremely significant effect on the compressive strength of 1d and 3d, followed by TEA. The optimal mix ratio predicted by RSM was 0.12 % Li 2 CO 3 , 0.47 % Na 2 SO 4 , and 0.40 % TEA. Early hydration stages revealed that the combined action of these accelerators increased the formation of CH, CaCO 3 , and amorphous C-(A)-S-H gel. Microscopically, the surface of fly ash exhibited alkali-induced corrosion, thereby enhancing its pozzolanic reactivity.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Shuai He,Yan Zhu,Ran Lei,Feng Qin,Guicheng Jiang,Bin Yang,Wenwu Cao
With the fast progress of ultrasonic transducer applications, higher and higher requirements have been put forward to the performance of the piezoelectric ceramics applied in this field. For power-type ceramics, not only high Q m is needed to reduce the heat and improve the power capacity, but also high d 33 is needed to provide the stronger driving force. In this work, a conventional ternary solid-solution ceramic system (0.05 Pb(Mn 1/3 Sb 2/3 )O 3 -0.47PbZrO 3 -0.48PbTiO 3 ) modified by ZnO and Li 2 CO 3 ( x wt % ZnO + y wt % Li 2 CO 3 ) (designated as: 0.05PMS-0.95PZT + x wt % ZnO + y wt % Li 2 CO 3 ) ( x , y = 0-0.3) was fabricated and researched. The combination of A-site doping of Li 2 CO 3 and B-site doping of ZnO was discovered to be able to enhance the piezoelectric coefficient ( d 33 ) effectively over 500 pC/N and maintain the mechanical quality factor ( Q m ) above 1000 simultaneously. The ZnO act as acceptor dopant to enhance the content of oxygen vacancies but facilitate the motion of domain walls to improve the piezoelectricity. Meanwhile, the A-site substitution of Li + construct an internal biased field to stabilize the domain structure leading to the relatively high Q m . Additionally, The Li 2 CO 3 also worked as sintering aid to form liquid transition phase to improve the densification process. The phase composition, microstructures of natural surfaces and fractured surfaces, electrical properties of ceramics were characterized systematically. The excellent comprehensive piezoelectric properties ( d 33 = 525 pC/N, Q m = 1064, k p = 0.63, T c = 320 °C, tan δ = 0.3% (at 25 °C), ε r = 1344) were achieved in the 0.2 wt % ZnO and 0.2 wt % Li 2 CO 3 co-doped 0.05PMS-0.95PZT ceramic sintered at 1075 °C. These advantages make 0.05PMS-0.95PZT + 0.2 wt% (ZnO and Li 2 CO 3 ) a promising alternative for the improvement and production of high-performance ultrasonic transducers applied in power-type applications.
✓ 已验证
DOI
高影响因子
Sustainable Materials and Technologies
·
2024
·
IF 8.6
Yong Niu,Dong Shi,Xinyu Cheng,Yuze Zhang,Lijuan Li,Fugen Song,Shaolei Xie,Xiaowu Peng
To satisfy the increasing global demand for the strategic metal lithium, recycling of LiFePO 4 (LFP) batteries has become an irresistible trend and poses a challenge due to the cost. A low-cost process of recovering Li and FePO 4 from simulated spent LFP was investigated through a closed-loop coupling technology of isomorphic substitution leaching and solvent extraction . A total of 99.41% of Li + can be leached, and 96% of FePO 4 can be recovered with an Fe 2 (SO 4 ) 3 :LFP molar ratio of 1:6, H 2 SO 4 :LFP molar ratio of 0.5:1, and 0.4 ml H 2 O 2 /g LFP for 30 min. An eleven-stage extraction process for Fe 3+ removal from lixivium-containing extraction, stripping and regeneration processes was designed and optimized. The total removal efficiency of Fe 3+ was 97.22% by the 40 vt% N235 + 15 vt% TBP + kerosene extraction system at a phase ratio O/A of 3.5/1, and the lithium concentration in raffinate was 10.074 g·L −1 . The closed-coupling process was carried out on the simulated spent LFP with a total Li recovery efficiency of >99%. The low-cost leaching agent Fe 2 (SO 4 ) 3 was cyclically utilized. The coupling process can not only serve as a promising efficient recycling method for spent LFP batteries but also supply an inspiring route for other expensive metal recycling.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2016
·Vol. 128
·期 3
·1783-1792
·
IF 1.781
Zhang Zhaoli,Yuan Yanping,Ouyang Liping,Sun Qinrong,Cao Xiaoling,Alelyani Sami
Nanofluids of Li 2 CO 3 –Na 2 CO 3 –K 2 CO 3 improved by three nano-Al 2 O 3 samples are firstly prepared by means of two-step aqueous method to enhance thermal properties for high-temperature heat transfer, when used as heat transfer fluids and thermal energy systems for concentrating solar power systems. Specific heat of ternary carbonates containing Al 2 O 3 of 0.2, 0.4, 0.8, 1.0, 1.4 and 2.0 mass% is measured, and nanofluids with 1.0 mass% of 20-nm Al 2 O 3 , 1.0 mass% of 50-nm Al 2 O 3 and 0.8 mass% of 80-nm Al 2 O 3 are selected as superior candidates. The maximum enhancement of specific heat is 18.5% in solid and 33.0% in liquid, 17.9% in solid and 22.7% in liquid, 13.2% in solid and 17.5% in liquid for nanofluids containing 20-, 50- and 80-nm Al 2 O 3 . Thermal conductivity is, respectively, improved by 23.3, 28.5 and 30.9% under the addition of Al 2 O 3 . New chemical bonds and crystals are scarcely formed in composites through FT-IR and XRD determination. SEM images certify that nano-Al 2 O 3 are homogeneously mixed into nanofluids and this structure may be a critical incentive for enhancing thermal properties. There are no significant changes with respect to the heat flow, melting/freezing point and latent heat after the 30 circles of determination. Briefly, it can be speculated that these nanofluids will exhibit tremendous potential in the coming applications of heat transfer and thermal storage for concentrating solar power systems.
研究领域:
材料科学
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能源工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hong Zhao,Dan Xu,Xiaoyang Duan,Xinyuan Zhou,Wenjun Jia,Wenjie Zhao
In this work, 5 wt‰ Li 2 CO 3 -doped 0.88Ba 0.8 Sr 0.2 TiO 3 -0.12BiMeO 3 (BST-BMe+5‰Li 2 CO 3 , Me = Al 3+ , Ga 3+ , Ta 5+ , and In 3+ ) ceramics were fabricated using solid phase sintering approach. The impacts of different B-site Me ions on the crystalline structure, permittivity stability, energy density , and energy storage efficiency of these ceramics were studied. The XRD results revealed that the mixed tetragonal (T) and pseudo cubic (pC) phase structure was obtained for all the samples. The In/5‰Li 2 CO 3 sample exhibits the optimal energy density of W rec = 1.04 J/cm 3 and the energy efficiency of η = 96% at 170 kV/cm. Meanwhile, the sample shows outstanding temperature stability satisfying the EIA-X8R criteria, which is ascribed to the combined roles of defect dipoles and large lattice distortion. Li 2 CO 3 plays a key role in reducing the sintering temperature , raising the breakdown strength , enhancing the relaxation characteristics, and improving the thermal stability of energy efficiency of the ceramics.
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
Sustainable Energy & Fuels
·
2024
·
IF 5
Genxi Yu,Youchun Wu,Dawei Sha,Jianwen Cai,Gaofa Nie,Yaping Wang,Long Pan,ZhengMing Sun
Garnet solid-state electrolytes (SSEs) have extraordinary application prospects due to their high room temperature ionic conductivity and high stability to lithium metal. However, when exposed to air during the preparation process, contaminants are inevitably generated on the electrolyte surface, resulting in poor wettability of the Li/garnet interface and high interfacial resistance. Moreover, solid-state batteries assembled with contaminated electrolytes can easily lead to the formation and expansion of lithium dendrites. Herein, we demonstrate a surface chemistry strategy of rapid vulcanization treatment to improve interface problems by introducing lithium sulfides into the garnet electrolyte. Compared to the surface contaminants (e.g., Li2CO3) on garnet, lithium sulfides (e.g., Li2S) have several advantages; it is a good Li+ conductor and has good wettability to both the garnet surface and Li metal anode. The interfacial resistance of the vulcanized garnet-SSE pellets decreased from 2961 Ω cm2 for LLZT@LC to 391 Ω cm2 for LLZT@LS. In addition, the lithium symmetric battery assembled by using LLZT@LS pellets exhibits stable plating/stripping cycling performance and ultralow overpotential at a current of 0.2 mA cm−2 without Li dendrite growth. Moreover, the LiFePO4/Li batteries with LLZT@LS pellets show excellent rate performances and cycling stability (114.3 mA h g−1 @ 0.5C after 150 cycles) with a capacity retention of 86%. These results demonstrate that the rapid treatment of garnet contaminants by a surface chemistry strategy is not only a simple and efficient solution but also provides strong support for the realization of high-performance solid-state lithium metal batteries (SSLMBs).
研究领域:
材料科学
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电化学
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能源存储
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Fansheng Meng,Xin Jia,Hongjun Kang,Wei Qin
Quasi-solid-state lithium metal batteries (QSSLMBs) using gel polymer electrolytes (GPEs) promise safer high-energy storage, but their performance is limited by interfacial instability that requires both fast Li + transport and durable electrode-electrolyte contact. Here we present an in-situ two-step strategy that couples electrochemical reduction with thermal curing to transform a spin-coated LiNO 3 precursor into a functionally synergistic Li 3 N/Li 2 CO 3 composite artificial SEI. The electrochemical step contributes to the formation of Li 3 N-containing ion-conducting species, while the curing step during GPE polymerization is associated with a more carbonate-rich surface that improves interfacial compatibility. DFT calculations show stronger ethylene carbonate adsorption on Li 2 CO 3 than on LiF, consistent with markedly improved wettability, as the electrolyte contact angle decreases from about 81° on cycled bare Li to about 11° on the engineered interface. The optimized anode enables stable symmetric cell cycling with 70 mV polarization for over 1200 h at 0.8 mA cm −2 , and LiFePO 4 full cells retain 95.5% capacity after 250 cycles at 0.3C and 94.4% after 300 cycles at 1C. This work shows that cooperative regulation of ion transport and contact retention within an inorganic-dominant multicomponent SEI can improve the stability of quasi-solid-state lithium metal interfaces.
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Linfeng Peng,Hang Yin,Lu Zou,Faquan Yu
As a promising energy storage technology, Li-CO 2 /O 2 batteries not only deliver ultrahigh discharge capacity but also capture and convert CO 2 into renewable energy. The exploration into the deposition and decomposition kinetics of discharge product (Li 2 CO 3 ) is urgent for the high thermodynamic stability. Herein, the influence of current density on the essential characteristics of Li 2 CO 3 has been explored. The results show that the Li 2 CO 3 with poor crystallinity and elliptical disk morphology can be obtained at medium current density, corresponding to the excellent electrochemical performance including ultrahigh capacity of 5800 mA h/g, lower discharge-charge gap of 1.15 V, and long-term cycle life of 80 cycles. In addition, the morphology and crystallinity of Li 2 CO 3 are tailored by the relative energy barriers for electron migration and O 2 - generation. At a medium current density (500 mA/g), the accelerated electron migration can realize the nucleation rate equivalent to growth one of Li 2 CO 3 . At this time, Li 2 CO 3 will uniformly deposit on the cathode surface, forming elliptical disk morphology with poor crystallinity. Obviously, this work provides new sights for promoting the development of Li-CO 2 /O 2 battery through rational design of catalysts to accelerate the deposition and decomposition processes of Li 2 CO 3 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 23
·2113318
·
IF 19.924
Shaojie Chen,Zhiwei Nie,Feifei Tian,Lu Nie,Ran Wei,Jiameng Yu,Tianyi Gao,Zhaoru Sun,Nan Yang,Wei Liu
Garnet-based solid state lithium batteries have attracted a lot of attention due to their potential advantages in safety and energy density. However, the high electrode–electrolyte interfacial resistance and low critical current density (CCD) related with lithium dendrite penetration have seriously hindered their further development and practical application. Here, for garnet-type solid electrolyte, the surface Li 2 CO 3 , interlayer species, lithium wettability, interfacial impedance, and CCD are systematically investigated. It turns out that Li 2 CO 3 -free garnet electrolyte is intrinsically lithiophilic, and the interfacial impedance is mainly affected by the amount of surface Li 2 CO 3 . In addition, the CCD values are manipulated by the interfacial impedance rather than the apparent Li wettability. This study provides a comprehensive understanding about the interrelationships among surface chemistry, lithium wettability, interfacial impedance, and critical current density for garnet-type solid electrolytes.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2016
·Vol. 27
·期 3
·1605011
·
IF 11.382
Yaxiong Yang,Yongfeng Liu,Kaichao Pu,Xing Chen,He Tian,Mingxia Gao,Min Zhu,Hongge Pan
In this study, an amorphous Li 2 CO 3 -coated nanocrystalline α-Fe 2 O 3 hierarchical structure is synthesized for the first time using a facile one-step mechanochemical process at room temperature, taking advantage of the concurrence of repeated fracture-cold welding of material's particles and a gas-solid redox reaction. The conformal coating and hierarchical structure significantly increase the cycling durability and rate capability. Typically, a 1–3 nm thick amorphous Li 2 CO 3 layer is conformally coated on Fe 2 O 3 nanocrystallines (≈10 nm in size) that form hierarchically aggregated particles 400–800 nm in size by ball milling α-Fe 2 O 3 with LiH in CO 2 . The prepared Li 2 CO 3 -coated nanocrystalline α-Fe 2 O 3 exhibits highly stable long-term cyclability as it delivers a reversible capacity of 975 mAh g −1 with 99% of retention after 400 cycles at 100 mA g −1 . At a high rate of 3000 mA g −1 , its reversible capacity still remains at 537 mAh g −1 , superior to the uncoated counterpart (311 mAh g −1 ). Moreover, amorphous Li 2 O and Li 2 CO 3 coatings are also similarly produced on Fe 2 O 3 and NiO nanocrystallines, respectively, representing the general applicability of this mechanochemical approach.
研究领域:
材料科学
·
电化学
·
纳米材料
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能源存储
·
固态化学
✓ 已验证
DOI
高影响因子
Small
·
2025
·Vol. 21
·期 15
·2409426
·
IF 12.1
Ruoxi Yang,Jiawei Xie,Jia Li,Xianqing Liang,Peilin Qing,Haifu Huang,Haizhen Liu,Dan Huang,Wenzheng Zhou
To improve the capacity at a high rate and cycle stability of LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811), a simple strategy is developed to synthesize the tungsten/niobium (W/Nb) co-doped cathode material. W/Nb co-doping remarkably reduced the system energy of single W- or single Nb-doping. The co-doping makes the material have a more stable structure, and inhibits the anisotropic volume change caused by H2↔H3 phase transition, thus maintaining the integrity of particles and preventing the formation of microcracks. Moreover, the passivation layer formed by co-doping prevents the occurrence of side reactions as well as the formation of microcracks. The synergistic effect of W and Nb is also conducive to inhibiting the formation of internal oxygen vacancies and surface Li 2 CO 3 . For the W/Nb co-doped sample, the capacity retention of 54.9% after 400 cycles and 52.3% after 500 cycles are maintained even at high currents of 5.0 and 10.0 C, respectively. The strategy of synergistic effect on enhancing co-doping with high valence cations can be spread as a simple and practical method to improve the electrochemical performance of nickel-rich layered cathode materials for lithium-ion batteries at high cut-off voltage.
研究领域:
材料科学
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电化学
·
锂离子电池
·
能源存储
·
固体化学
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表面化学
·
结构稳定性
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）