HYDROMETALLURGY
·
2026
·
IF 6.3
Shuang Sun,Yuefeng Deng,Ji Chen,Yang Meng,Rui Qin,Zhongte Du
Lithium recovery from weakly acidic raffinate of spent LIBs by P507 was studied. • A cascade extraction process was designed for the separation of Li + /Na + . • P507 could extract 99.9% of Li + in the feed at the lower equilibrium pH of 5.96. • The stripping liquor comprising 22.2 g/L Li + and 0.11 g/L Na + was obtained. • The kinetic of Li + extraction was discussed and the control mechanism was revealed. The booming growth of electric vehicle industry contributes to sizable end-of-life lithium-ion batteries (LIBs). It is crucial to recover Li + from the high Na/Li ratio raffinate of spent LIBs for circular economy and sustainable resources. In this paper, the Li + extraction process from weakly acidic raffinate of spent LIBs by 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (P507) system was investigated. Compared with di-2-ethylhexyl phosphoric acid (P204), P507 showed better separation selectivity for Li + /Na + . The extraction parameters of saponification degree, modifying agents, phase ratio, extraction time, and loading capacity were optimized. A cascade extraction process with ten-stage extraction and eight-stage scrubbing was designed for separating Li + /Na + . It could be concluded that P507 could extract 99.9% of Li + from the feed at an equilibrium pH of 5.96, and the loaded organic phase comprising 2.55 g/L Li + and 0.02 g/L Na + was obtained. Moreover, a three-stage countercurrent stripping process was conducted with 1.75 mol/L H 2 SO 4 at an O/A ratio of 9:1. The final stripping liquor contained 22.2 g/L Li + and 0.11 g/L Na + , and a high-purity (99.5%) Li 2 CO 3 product was obtained by precipitation. Eventually, the kinetic study of Li + extraction with saponified P507 was discussed via the constant interfacial area cell method. The control mechanism was a mixing control occurring at the two-phase interface. The initial extraction rate equation of Li + could be expressed as R Li, init = 10 –6.15 [Li + ] 0.65 [NaA] 0.95 . This research provided a novel insight into the efficient separation of Li + /Na + under weakly acidic conditions, which would benefit the potential industrial applications and environmental protection.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yixuan Zhao,Lu Liu,Li Zhou,Ruiqi Yang,Changlin Li,Jiexin Chen,Ziyue Hu,Haoran Su,Bin Deng,Xiaohui Ji,Ruijin Yu
New Sm 3+ doped Cd 2 MgTeO 6 tellurate red-emitting phosphors with Na + ions as charge compensation were obtained using a high-temperature solid-state approach at 1000 °C. During this study, the prepared phosphors were subjected to phase purity, particle morphology , luminescence characteristics, thermal stability, and Commission Internationale de L′ Eclairage (CIE) chromaticity. The critical quenching concentration of Sm 3+ doped Cd 2 MgTeO 6 phosphor was 2 mol%. According to Dexter's theory and the calculated R c value (22.21 Å), the dipole-dipole interaction causes the phenomenon of concentration quenching. Particularly, the Cd 2 MgTeO 6 :2 mol%Sm 3+ , 2 mol%Na + phosphor exhibited an evident red-light emission (647 nm) at λ ex = 407 nm because of the 4 G 5/2 to 6 H 9/2 level transition of Sm 3+ . Its internal quantum efficiency (IQE) was 38.87%. It is worth noting that the Cd 2 MgTeO 6 :Sm 3+ , Na + phosphor exhibited abnormal thermal quenching (ATQ) characteristics, and the luminous intensity of the Cd 2 MgTeO 6 :2 mol%Sm 3+ , 2 mol%Na + increased by 7.20% at 480 K compared with the initial temperature. In addition, white LEDs and red LEDs were successfully manufactured with a 408 nm chip. The prepared red LED showed the emission spectrum similar to the absorption spectrum of Phytochrome P r , which is expected to be applied in plant growth. The w-LED had a CCT (correlated color temperature) of 4790 K, color rendering index of 91, and color coordinates of (0.348, 0.335). Therefore, the Cd 2 MgTeO 6 :Sm 3+ , Na + phosphor has demonstrated potential applications in w-LEDs and plant growth LEDs.
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高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Xin He,Wutong Chen,Feiyun Sun,Zekai Jiang,Bing Li,Xiao-yan Li,Lin Lin
Flow-electrode capacitive deionization (FCDI) is a promising electromembrane technology for wastewater treatment and materials recovery. In this study, we used low-cost Na-modified zeolite (Na-zeolite) to prepare a composite flow-electrode (FE) suspension with a small amount of highly conductive carbon black (CB) to remove and recover NH4+ from synthetic and actual wastewater (200 mg-N/L). Compared with conventional activated carbon (AC), the Na-zeolite electrode exhibited a 56.2–88.5% decrease in liquid-phase NH4+ concentration in the FE suspension due to its higher NH4+ adsorption capacity (6.0 vs. 0.2 mg-N/g). The resulting enhancement of NH4+ diffusion to the electrode chamber contributed to the improved performance of FCDI under both constant current (CC) and constant voltage (CV) conditions. The addition of CB to the FE suspension increased the conductivity and facilitated Na-zeolite charging for NH4+ electrosorption, especially in CV mode. NH4+-rich zeolite can be easily separated by sedimentation from CB in the FE suspension, producing a soil conditioner with a high N-fertilizer content suitable for soil improvement and agricultural applications. Overall, our study demonstrates that the novel Na-zeolite-based FCDI can be developed as an effective wastewater treatment technology for both NH4+ removal and recovery as a valuable fertilizer resource.
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PubMed
高影响因子
Advanced Science
·
2023
·
IF 15.1
Quanzhen Sun,Chen Shi,Weihao Xie,Yifan Li,Caixia Zhang,Jionghua Wu,Qiao Zheng,Hui Deng,Shuying Cheng
Ion doping is an effective strategy for achieving high-performance flexible Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells by defect regulations. Here, a Li&Na co-doped strategy is applied to synergistically regulate defects in CZTSSe bulks. The quality absorbers with the uniformly distributed Li and Na elements are obtained using the solution method, where the acetates (LiAc and NaAc) are as additives. The concentration of the harmful Cu Zn anti-site defects is decreased by 8.13% after Li incorporation, and that of the benign Na Zn defects is increased by 36.91% after Na incorporation. Synergistic Li&Na co-doping enhances the carrier concentration and reduces the interfacial defects concentration by one order of magnitude. As a result, the flexible CZTSSe solar cell achieves a power conversion efficiency ( PCE ) of 10.53% with certified 10.12%. Because of the high PCE and the homogeneous property, the Li&Na co-doped device is fabricated to a large area (2.38 cm 2 ) and obtains 9.41% PCE . The co-doping investigation to synergistically regulate defects provides a new perspective for efficient flexible CZTSSe solar cells.
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PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Tingting Zhou,Xueli Huang,Baharguli Hadeerbieke,Fangning Yan,Xueying Wang,Qinglong Luo
The phase diagram can guide the comprehensive utilization of salt lake brine, particularly lithium extraction. In this paper, the study on phase equilibria of the quinary system Li+, Na+, K+, Mg2+//Cl––H2O saturated with NaCl·2H2O and its subsystem Li+, Na+, Mg2+//Cl––H2O at 258.15 K were carried out using the isothermal dissolution equilibrium method. Based on the experimental data, equilibrium diagrams for stable phases were plotted. For the equilibrium diagram of the quaternary system Li+, Na+, Mg2+//Cl––H2O at 258.15 K, there are two invariant points, five univariant curves, and four crystallization fields. The quinary system Li+, Na+, K+, Mg2+//Cl––H2O saturated with NaCl·2H2O at 258.15 K contains three invariant points, seven univariant curves, and five crystallization fields. Comparing the phase diagram of the system at 258.15 K to that at 298.15 K reveals that, except KCl, all crystallization zones have decreased, and LiCl·MgCl2·7H2O has the smallest crystallization zone compared to the other salts in the systems. This fundamental research could be valuable for promoting comprehensive utilization of the lithium-containing salt lake brine.
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高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 22
·5932-5940
·
IF 7.779
Yufei Song,Shaoxin Cui,Zhen Qian,Hongwei Yu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongping Wu
Three new chalcohalide nonlinear optical crystals, [ASr4Cl][Ge3S10] (A = Na, K) and [KBa4Cl][Ge3S10], have been successfully designed and synthesized by combining the covalent [Ge3S9] clusters and ionic [AB4Cl] frameworks. Their crystal structures were determined by single crystal X-ray diffraction, which showed that all three compounds crystallized in the noncentrosymmetric and polar space group of P63. Three structures are iso-structural and can be seen as salt-inclusion structures with the isolated [Ge3S9] clusters stacked alternately along the c axis and 1∞[ClNaSr(2)3]6+ chains acting as scissors to cut the connection between the [Ge3S9] clusters, which is still rare in the known chalcohalides. The IR and Raman spectra indicate that [ASr4Cl][Ge3S10] (A = Na, K) and [KBa4Cl][Ge3S10] have wide IR transparent windows up to 20 μm. UV-Vis-NIR diffuse reflectance spectra manifest that all three compounds have large band gaps of 3.54, 3.51, and 3.57 eV, respectively. In addition, the title compounds also exhibit large laser damage thresholds (∼12 × AgGaS2) and moderate SHG responses (1.08, 0.91, and 0.82 × AgGaS2, respectively). These properties demonstrate their potential as IR NLO crystals. Furthermore, the influence of the (M + N)/Q ratios (M = IIIA or IVA, N = IB or IIB or cations coordinated as [MxQy] anionic groups; Q = S, Se) on the anionic group structural dimensions was discussed, and the structure–property relationship was also studied based on the first-principles calculations. These may produce some insights for designing new chalcohalides.
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高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Zhengying Wang,Qi Li,Keyan Sheng,Jiang Huang,Chun Fang,Jiantao Han
“Water-in-salt” electrolytes have enlarged the electrochemical window of aqueous electrolytes to 3.0 V. However, the practical application of this electrolyte faces the challenge of high cost. Recently, we have proposed a low-cost inorganic room temperature molten salt (RTMS) electrolyte with a widened electrochemical window of 3.1 V. Herein, the RTMS electrolyte has been integrated with a hydrophilic polymer by ultrafast polymerization through electron beam irradiation to further enlarge the anode limit, increase the ionic conductivity, and improve the thermal stability. The double-redox-active Prussian blue analogues of the cobalt hexacyanoferrate cathode (NaCoHCF) in the RTMS-based polymer electrolyte prepared by electron beam (EB) irradiation (e-RPE) show electrochemical performance with a high capacity of 137 mAh·g–1 at 1C and 100 mAh·g–1 at 5C. More significantly, at a high temperature of 60 °C, the NaCoHCF electrode in e-RPE exhibits a high capacity of 120 mAh·g–1 at 5C and a high capacity retention of 92% over 100 cycles at 1C. Compared to RTMS, the RTMS-based polymer electrolyte not only expands the hydrogen evolution limit but also shows high thermal stability, which is favorable for the electrochemical performance of NaCoHCF at high temperature. Furthermore, the battery with e-RPE is intrinsically safe and can be widely used in large-scale energy storage and wearable device applications.
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Batteries & Supercaps
·
2021
·Vol. 5
·期 4
·e202100367
·
IF 7.093
Yuyao Zhang,Xiaoying Zhu,Dan Kai,Baoliang Chen
Graphical Towards high energy density SIB : Biomass hyaluronic acid (HA) is developed as a novel binder for high-loading Na 3 V 2 (PO 4 ) 3 cathodes in sodium-ion batteries, which delivers a high reversible capacity, a superior rate capability, and a targeted energy density. Fast ion transport, network volume buffer and stable solid permeable interface are demonstrated along with structure-performance mechanisms. Sodium-ion batteries (SIBs) are considered a promising candidate in green energy storage due to their considerable abundance. The low mass loading (less than 2.0 mg cm −2 ) of SIBs-based cathodes cannot meet the energy density on the practical device level, which is mainly restricted by sluggish Na + transport. To the end, a facile and compatible strategy was demonstrated by utilizing hyaluronic acid (HA) binder to achieve fast ion transport and targeted energy density for Na 3 V 2 (PO 4 ) 3 (NVP) cathodes. As a novel functional aqueous binder, HA allowed cathodic materials to organize the unique conductive network. The network-like electrode structure could buffer volume changes during sodiation/desodiation process and provide bi-continuous charge transport channels for both Na + and electrons at the interface. HA promoted the formation of the stable solid permeable interface films, protecting the electrochemical stability of the cathode and ensuring its good cycle performance. These functions of HA binder enabled that NVP delivered a reversible discharge capacity of 107.3 mAh g −1 at 0.5 C (1 C=117 mA g −1 ), which showed no sacrifice of electrochemical performances with mass loading increasing from 1.1 to 4.4 mg cm −2 . Even at a high rate of 20 C, NVP-HA (loading 4.0 mg cm −2 ) could reserve a good capacity of 76.8 mAh g −1 with the retention of 99.3 % after 2000 cycles. This study provides a novel strategy to achieve high energy density for SIBs in large-scale energy storage.
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高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Tiancheng Dong,Shiyu Liu,Zihe Chen,Yida Lu,Baoqi Gu,Hongyu Luo,Bochuan Deng,Shan Hu,Yongming Sun,Wen Chen
Hard carbon (HC) is widely considered one of the most practical anodes for sodium-ion batteries because of its suitable Na-storage capacity and low cost. Ester electrolytes with high fluoroethylene carbonate (FEC) contents are often adopted to stabilize high-voltage cathodes by forming a robust cathode electrolyte interphase and mitigating parasitic reactions. For HC anodes, however, high FEC contents can aggravate interfacial instability and hinder Na + transport. Here, a bilayer coating consisting of an inner amorphous P x O y layer and an outer carbon layer is engineered on HC. Acting as a reactive interphase precursor rather than a passive coating, the bilayer promotes the in situ formation of a NaPO 3 /Na 3 PO 4 /NaPO x F y -rich inorganic solid electrolyte interphase (SEI) during the initial cycle. This phosphate-based SEI effectively improves Na + transport and interphase stability. Consequently, the modified anode delivers 270 mAh g −1 after 200 cycles at 100 mA g −1 and 71.4 mAh g −1 at 1000 mA g −1 . A full cell with a Na 3 V 2 (PO 4 ) 2 O 2 F (NVPOF) cathode delivers 119 mAh g −1 initially and retains 88.6% of its capacity after 100 cycles within 1.5-4.2 V. This work demonstrates that a reactive phosphate-forming surface layer can regulate SEI chemistry and improve the compatibility of HC with FEC-rich ester electrolytes.
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高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2023
·
IF 10.4
Liangyong Chen,Daocheng Liu,Guoqiang Wei
Integrated Capture and Methanation of CO 2 (ICCM) with H 2 produced from renewable energy is a novel Power-to-Gas technology. The combination of ICCM with CO 2 point source, such as coal-fired power plant, is anticipated, which greatly motivates the investigations into the influences of coal ash on the key performance of dual function material (DFM) used in ICCM process. Via the experimental study on the coal ash impacts, this work explored the adaptability of DFM and ICCM to coal-fired power plant. Na-Ru/Al 2 O 3 DFM and two ashes collected from the electrical precipitators of supercritical coal-fired power plants were used for experiments. It showed that fly ashes contaminated CO 2 adsorbents and active sites of DFMs, and caused successive drops in carbonates conversion and CH 4 selectivity upon cyclic ICCM reactions. The CO 2 -TPD and H 2 -TPSR tests revealed that the declined supply capability of hydrogen atoms by Ru sites, and the increased rate gap between CO formation and the following CO hydrogenation were responsible for the declined methanation ability of ash-contaminated DFMs. The roles of SiO 2 and Fe 2 O 3 phases in ashes were identified, indicating that SiO 2 reacted with adsorbent components and masked Ru sites, and then induced DFM deactivation by affecting the transport processes of key reactants; Fe 2 O 3 successively invaded both Ru sites and Na 2 CO 3 /γ-Al 2 O 3 interface, leading to successive losses in methanation ability and CO 2 desorption capacity with cyclic ICCM reactions.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 4
·043501
·
IF 4.316
Kailiang Ren,Zeang Duan,Yuan Li,Lu Zhang,Shumin Han
LaFeO3 as a new negative electrode material for nickel-hydrogen batteries used as energy storage has the advantages of high capacity, advanced temperature resistance, and low cost. However, its conductivity and dynamic performance are poor, seriously hindering its applications. In light of increasing concentration of oxygen vacancies and improving conductivity after replacing A-site elements of the material, here we synthesize low-priced Na doping LaFeO3 oxides, La1−xNaxFeO3 (x = 0–0.8), as the negative electrode by a solid-state reaction method. Studies show that doping Na can reduce particle aggregation, thus helping to increase the surface area of LaFeO3. Therefore, its discharge capacity remarkably increases to 356.7 mAh g–1 (x = 0.6) from 178.8 mAh g–1 (x = 0) at 60 °C, which also maintains 73.4% after 100 cycles for La0.4Na0.6FeO3, elevated by 55.1% compared to LaFeO3. In addition, the high rate discharge ability of an La0.4Na0.6FeO3 electrode at a discharge current density of 1500 mA g–1 reaches 30.7% in contrast to 11.2% for undoped LaFeO3. As such, the La0.4Na0.6FeO3 material with superior cycling capacity is proven to be a more promising electrochemical hydrogen storage electrode compared to LaFeO3, which greatly increases the practical application value of the material.
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Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 5
·1289-1297
·
IF 5.958
Zhaoyang Wang,Jinmei Liu,Zijuan Du,Haizheng Tao,Yuanzheng Yue
Na3V2(PO4)3 (NVP) features a three-dimensional open structure, which allows fast migration of Na+ ions, and thus, NVP is a superior cathode material for sodium ion batteries. However, the application of the NVP cathode is limited by its low electronic conductivity. To overcome this limitation, we developed an NVP nanocomposite cathode by doping carbon with bromine (Br) and nitrogen (N) during the sol–gel assisted hydrothermal reaction. The Br- and N-doping leads to the formation of amorphous carbon (a-C) on the surface of NVP particles. The nanocomposite possesses multilevel structures containing both pores with different sizes and aggregated grains (200–300 nm). Since the doped N provides electrons to the carbon matrix, the electronic conductivity of the nanocomposite is enhanced. Br-Doping leads to the drop of activation energy for V4+/V5+ redox reaction. The nanocomposite cathode exhibits a high reversible capacity of 41 mA h g−1 at 10C. Both the superior rate and cycling performances could be attributed to the synergistic effect of the multilevel structure and amorphous carbon.
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