INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Bailin Chen,Yansheng Jiang,Hangwei Jia,Shuai An,Xueling Hou,Shilie Pan
Birefringent crystals, as core materials for polarization modulation, hold significant importance for the advancement of laser polarizing technology, high-precision instruments, and other optical communication fields today. However, balancing the deep ultraviolet (DUV) cutoff edge and birefringence remains a demanding challenge. Borophosphates have emerged as a promising research direction for optoelectronic functional materials, but the small birefringence of most borophosphates limits their applications. Here, a novel mixed-coordinated hydroxyborophosphate, NH4B3PO6(OH)3, has been successfully designed and obtained. This compound belongs to the triclinic space group P1 (No. 2), exhibiting pronounced birefringence (the experimental refractive index difference value is 0.057 at 546 nm) and a short DUV cutoff edge below 200 nm. These properties indicate that NH4B3PO6(OH)3 exhibits excellent potential as a DUV birefringent material.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiaoqing Zhang,Jianwei Xiong,Fengzhen Chang,Zhuijun Xu,Zheng Wang,Philip Hall,Ya-Jun Cheng,Yonggao Xia
The Ni-rich cathode holds great promise for high energy density lithium-ion batteries because of its high capacity and operating voltage. However, crucial problems such as cation disorder, structural degradation, side reactions, and microcracks become serious with increasing nickel content. Herein, a novel and facile sol/antisolvent coating modification of Ni-rich layered oxide LiNi0.85Co0.1Mn0.05O2 (NCM) is developed where we use ethanol to disperse the nanosized LiBO2 to form the sol and adopt tetrahydrofuran (THF) as antisolvent to prepare the cluster of nanoparticles to be coated on the surface of NCM. The coating thickness can be tuned through the THF addition amount. The LiBO2 nanorod deposition is formed as well over the crack of the NCM cathode, likely acting as a patch to repair the original defect of the intrinsic crack. The uniform LiBO2 nanospherical particle coating together with LiBO2 nanorod wrapping provides a double protection against electrolytes. Compared with the raw material, LiBO2-coated LiNi0.85Co0.1Mn0.05O2 (LiBO2-coated NCM) exhibits a high initial Coulombic efficiency of 90.3% at 0.2 C between 2.8 and 4.3 V vs Li+/Li, a superior rate capability, enhanced fast charge property at 3 C, and restricted microcrack formation. This simple in-site modification and repairing technology guarantees a good mechanical integrity of the polycrystalline Ni-rich cathode.
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JOURNAL OF CHEMICAL THERMODYNAMICS
·
2022
·
IF 3.269
Lingyan Gui,Dongdong Li,Jiangtao Wu,Xianyang Meng
The apparent molar heat capacities of LiBO 2 (aq), NaBO 2 (aq), KBO 2 (aq), Na 2 B 4 O 7 (aq) and K 2 B 4 O 7 (aq) solutions at molalities from 0.01 to 2.6 mol·kg −1 , and at temperatures T = (298.12, 313.13 and 328.14) K have been determined using a Picker flow calorimeter built in this work. Further, the standard heat capacities of these solutes were derived from the experimental data by extrapolation to infinite dilution using the Pitzer ion-interaction model. The group contribution method is used to calculate the standard molar heat capacities of tetraborate ion in three equilibria for different assumptions, among which the prediction on the assumption that the standard molar heat capacity of reaction for the association reaction is zero is the most reasonable, and the results are in good agreement with the experimental data.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Tao Zhang,Liwei Zhuang,Dan Li,Lingzong Meng,Tianlong Deng,Yafei Guo,Yong Ma
The solubilities of salts, refractive indices, and pH values of the equilibrium liquid phases in the quaternary system LiCl–LiBO2–Li2B4O7–H2O at 323.15 K were investigated by the isothermal dissolution method for the first time. The dry-salt diagram of the quaternary system consisted of one invariant point, three univariant curves and three crystallization fields corresponding to LiCl·H2O, LiBO2·2H2O, and Li2B4O7·3H2O. The solution refractive indices and pH values change regularly with the changing of concentration. Combining the equilibrium constants for different boron species, the distributions of six boron species in the mixed solution in the systems LiCl–LiBO2–H2O, LiBO2–Li2B4O7–H2O, and LiCl–Li2B4O7–LiBO2–H2O were calculated with the total boron concentration and pH values. The main boron species in the mixed solution of the quaternary system are B3O3(OH)4–, B4O5(OH)42–, B(OH)3, and B5O6(OH)4–. The boron species distributions are mainly affected by the pH values and the concentration of total boron and LiCl in the solution. The results of phase diagram and boron species distribution in the quaternary system can supply foundation data for separating lithium borate from brines.
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JOURNAL OF CHEMICAL THERMODYNAMICS
·
2021
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IF 3.178
Tao Zhang,Lan Yang,Dan Li,Lingzong Meng,Yafei Guo,Tianlong Deng
The pH values, solubilities and water activities in the system LiB(OH) 4 –NaB(OH) 4 –H 2 O at 323.15 K were investigated. The mole fractions of boron species were calculated in the aqueous borate solutions, and the distribution and relevant mechanism were also discussed. The solubility diagrams in the ternary system were drawn at 323.15 K. The phase diagram consists of two single salt regions for LiB(OH) 4 and NaB(OH) 4 ·2H 2 O, one invariant point co-saturated with the above salts. On the basis of the Pitzer model, the Pitzer binary parameters and mixing parameters were fitted with the water activities, saturated vapour pressure and solubilities in the ternary system. The dissolution equilibrium constants ( K sp) of LiB(OH) 4 and NaB(OH) 4 ·2H 2 O were calculated using the experimental solubility data. The calculated solubilities with the parameters and K sp agree well with the experimental data.
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ANALYTICAL SCIENCES
·
2021
·Vol. 37
·期 12
·1735-1740
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IF 2.081
Zhao Liangcheng,Wei Li,Hu Yanqiao,Chen Qingzhi,Cheng Wencui,Zhang Jinming,Li Xing,An Ziyi,Meng Jianwei,Liu Huajie
Existing methods can not achieve rapid mass decomposition and multi-element analysis of graphite ore samples. In this study, it is found that molten lithium metaborate can destroy the structure of graphite, causing graphite C to be oxidized and decomposed in an oxygen environment. We have established a method for testing graphite ore samples with lithium metaborate at 950°C with melting–ultrasonic extraction–ICP-AES multi-element (Al, Ca, Fe, K, Mg, Mn, Na, P, Si, and Ti) testing. The verification results of the national first-level reference materials show that the detection limit of this method is low and the accuracy and precision are good. The results of the measured samples show no significant difference between this method and the classical chemical analysis method. This method has the following advantages over the existing ones: simple operation process, faster decomposition and testing, low reagent consumption, reduced possibility of sample contamination, and better results reproducibility.
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FLUID PHASE EQUILIBRIA
·
2020
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IF 2.838
Lan Yang,Lele Chen,Tao Zhang,Dan Li,Lingzong Meng,Tianlong Deng,Yafei Guo
The solubilities and the refractive indices in the ternary system LiBO 2 −Li 2 B 4 O 7 −H 2 O at 298.15 K and 323.15 K were determined with the isothermal dissolution method. The phase diagrams and refractive index diagrams were drawn with the experimental values. The phase diagrams at 298.15 K and 323.15 K consist of one invariant point, two univariant curves and two crystallization regions corresponding to Li 2 B 4 O 7 ·3H 2 O, LiBO 2 ·8H 2 O (at 298.15 K) and LiBO 2 ·2H 2 O (at 323.15 K). Based on the Pitzer model, the mixing ion-interaction parameters ( θ B ( O H ) 4 − , B 4 O 5 ( OH ) 4 2 − and Ψ L i + , B ( O H ) 4 − , B 4 O 5 ( O H ) 4 2 − ) at 298.15 K and 323.15 K were fitted with the solubility data. A comparison shows that the calculated solubilities in the ternary system at 298.15 and 323.15 K agree well with the experimental data. The phase diagram and Pitzer model for the ternary system were then used to conduct isothermal evaporation simulation. Different salt will be obtained if the original solution point in different unsaturated regions.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhengshan Yang,Huayi Yin,Bowen Deng,Dihua Wang
Molten carbonate electrolysis cells (MCEC) are a promising electrochemical CO 2 capture and conversion process. However, the CO 2 absorption and energy efficiencies are limited by the sluggish CO 2 absorption kinetics and high electrode overpotentials. Herein, we propose an electrolyte engineering strategy to improve the CO 2 absorption rate and reduce overpotentials at both the anode and the cathode. When BO 3 3− was added into molten Li 2 CO 3 -Na 2 CO 3 -K 2 CO 3 , the CO 2 adsorption efficiency was improved from 3.3% to 60%, the overpotential was reduced by ∼ 567 mV at the cathode and by ∼ 238 mV at the anode under 200 mA cm −2 . Accordingly, the energy efficiency reached 76.2 % at 650 °C. The improved CO 2 absorption and energy efficiencies are thanks to the BO 3 3− that changes the thermodynamic properties of the molten carbonate, i.e., the BO 3 3− –CO 3 2− complex reduces the energy barrier for the reduction of CO 3 2− at the cathode and for the liberation of O 2− that can be oxidized at a lower potential than CO 3 2− at the anode. Therefore, the electrolyte engineering is an effective strategy for designing high-temperature CO 2 electrolyzers with high CO 2 absorption and energy efficiency.
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CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Hainan Bai,Jiulin Hu,Xiaoguang Li,Yusen Duan,Feng Shao,Takahiro Kozawa,Makio Naito,Jingxian Zhang
Concerning the safety problems of conventional Li-ion batteries with liquid electrolytes, it is crucial to develop reliable solid-state electrolytes with high ionic conductivity . Li 1+x Al x Ti 2−x (PO 4 ) 3 (LATP, x = 0.3) is regarded as one of the most promising solid electrolytes due to its high ionic conductivity and excellent chemical stability to humidity. Herein, a new strategy is proposed for improving the sintering behavior and enhancing the ionic conductivity of LATP by using LiBO 2 as the sintering aid via liquid phase sintering . The as-prepared sample LATP with homogeneous microstructure and high relative density of 97.1% was successfully synthesized, yielding high total ionic conductivity of 3.5 × 10 −4 S cm −1 and low activation energy of 0.39 eV at room temperature. It was found that the addition of LiBO 2 could effectively enhance the densification and increase the ionic conductivity of LATP electrolyte, proving an effective way to synthesis LATP ceramics by a simple and reliable route.
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JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Lei Shi,Chunlin He,Xinsheng Li
A novel method for scandium recovery is proposed through high-surface area silanol-rich silica sorbents which were prepared with calcium silicate hydrate (C - S - H) as raw material. Two types of silanol - rich silica particles, i.e., LAC-S (silica derived from acid leaching of amorphous C - S - H) and LLC - S (silica derived from acid leaching of low-crystallinity C - S - H) are obtained after calcium ions are removed from both amorphous and low-crystallinity forms of C - S - H through a facile acid leaching process (3 mol/L, 25 °C, 24 h). 29 Si NMR spectroscopy reveals that the proportion of silicon atoms carrying silanol groups increases from less than 43% to over 80% when silica particles are transferred from a dry state to an aqueous solution. Batch adsorption experiments were conducted to evaluate the sorption performance and selectivity of these silica sorbents toward Sc(III).The scandium sorption capacities of LAC - S and LLC - S at an equilibrium pH of 4.2 are 174.45 and 129.57 mg/g, respectively. The separation factors (SF Sc/Ln ) of both silica particles exceed 1000 in the initial pH range of 3.5 to 5. The loaded scandium ions are recovered with 3 mol/L hydrochloric acid and the sorbents exhibit good reusability. This strategy provides an efficient and green method for recovering scandium from aqueous solutions.
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Science China-Chemistry
·
2025
·
IF 9.7
Sun Haofeng,Wang Minghao,Li Wenjie,Liu Yang,Sun Xinyu,Wang Wenjie,Guo Yuqiao,Xie Yi,Wu Changzheng
Considerable progress has been made in synthesizing two-dimensional (2D) materials by exfoliating layered solids. However, for tremendous non-layered inorganic materials, especially magnet solids, usually with closely packed bulk phases by strong chemical bonds, it is challenging to obtain their high-quality 2D sheets. Herein, we highlighted a new structure of free-standing ferromagnetic nanosheets featuring (111) facets. For magnet, Fe 3 O 4 , its inversed spinel crystalline has limited abilities to exfoliate into 2D forms and rarely exists as free-standing nanosheets owing to aggregation induced by magnetic force. We realized a breakthrough in achieving free-standing ferromagnetic nanosheets with dramatically surpassing size limitations via topotactic conversion from layered counterparts. Our Fe 3 O 4 nanosheets exhibited a maximum width of 60 µm while only ∼4 nm thick, prominently exposing (111) facets. 2D Fe 3 O 4 behaved anisotropic magnetism, which displayed a 4.6 emu g −1 moment ( H =500 Oe) in the (111) plane but 2.1 emu g −1 out of the (111) plane, indicating a (111) in-plane easy axis. We anticipated our topotactic conversion strategy would inspire the creation of 2D non-layered materials and enrich the 2D materials family.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Hongyu Qi,Jiaxin Han,Lin Xing,Jia Xu,Yushan Liu,Xun Wang,Tao Zhang,Yong Ma,Lingzong Meng
The phase equilibrium of the quinary system LiCl–Li2SO4–LiBO2–Li2B4O7–H2O at 323.15 K was studied with an isothermal dissolution method. The dry-salt phase diagram of the quinary system consists of one invariant point saturated with LiCl·H2O, Li2B4O7·3H2O, and LiBO2·2H2O, three univariant curves, and three crystallization regions saturated with Li2SO4·H2O corresponding to LiCl·H2O, Li2B4O7·3H2O, and LiBO2·2H2O. The J(H2O), J(Li2SO4), refractive index, and pH value change gradually with the changing concentration. Combining the equilibrium constants for boron-containing species, the pH values, and concentration of total boron, the boron-containing species distributions in the mixed solution in the system were calculated. The concentrations of B3O3(OH)52– and B5O6(OH)4– are very low and can be neglected. The boron-containing species distributions are mainly affected by m(LiCl) in the solution but less by m(Li2SO4). The results of the phase diagram and boron-containing species distribution in the quinary system can provide fundamental thermodynamic data for the extraction of lithium borate from brines.
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