JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Shuzeng Zhang,Yang Ding,Teng Zhang,Kangrui Qiang,Pengcheng Wu,Xiaoqian Zhang,Jiasong Zhong
The utilization of phosphors for information storage, data encryption, temperature sensing, etc. has been becoming a research hotspot. However, modulating dynamic and pluralistic phosphor emissions is still a huge challenge. Herein, we developed a Li + -induced site occupation engineering in Bi 3+ activated Mg 2 SnO 4 (MSO) phosphor with multiple emissions and dynamic afterglow for versatile applications. Experiments and first-principles calculations demonstrated that Bi 3+ would simultaneously enter [MgO 4 ] tetrahedron and [SnO 6 ] octahedron to present red and blue emissions, respectively. As Li + ions were introduced into Mg 2 SnO 4 :Bi 3+ , the preferably generated [LiO 4 ] could hinder the Bi 3+ from entering [MgO 4 ] units, so as to force Bi 3+ to substitute Sn 4+ in [SnO 6 ], thereby leading to strengthened blue emission. Due to the distinct luminescence decay of Bi 3+ in tetrahedron and octahedron units, the luminescence colors were regulated from blue to purple and red with enhancing temperature upon UV light excitation, being suitable for luminescence intensity ratio (LIR) thermometer. Moreover, by virtue of the afterglow properties originating from the inherent oxygen vacancies of Mg 2 SnO 4 , the dynamic information encryption and anti-counterfeiting by Mg 2 SnO 4 :Bi 3+ , Li + were achieved. The proposed site occupation engineering can certainly spur several innovative ideas in manufacturing high-performance phosphors for versatile applications.
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WATER RESEARCH
·
2025
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IF 12.4
Xiongrui Jiang,Lingjie Zhang,Yanhui Miao,Licai Chen,Jiaoyan Liu,Tingting Zhang,Shuai Cheng,Yuhan Song,Yunliang Zhao
Stacking two-dimensional (2D) nanosheets into lamellar membranes holds great promise in the selective separation of Li + and Mg 2+ from salt-lake brines, but revealing the intrinsic effect of nanosheet properties on the ion transport remains a great challenge. The primary reasons are inevitable emerging defects and changes in surface functional groups during nanosheet preparation. Here, we successfully demonstrated the intrinsic dependence of ion separation on the size and layer charge density of 2D building blocks using defect-free and inherently permanent charged clay nanosheets. The smaller-sized nanosheets readily assembled into lamellar membranes with narrower nanochannel dimension, which facilitated the steric hindrance effect to improve the Li + /Mg 2+ selectivity. Experiments and calculations demonstrated the layer charge density-dependent ion separation as well, for which a novel mechanism of intrinsic selective separation driven from the energy barrier difference of ions transport was proposed. Based on the “internal” regulation of the intrinsic nanosheet properties, MMT membranes realized stable and efficient Li + /Mg 2+ separation under extreme conditions, multi-cycle and long-term experiments, with an optimal S Li/Mg of 38.9, superior to most of the reported state-of-the-art membranes. This work reveals the intrinsic interplay of nanosheet properties tuning the ion transport and separation, which will inspire the design and development of advanced 2D lamellar membranes, particularly for sustainable and environmental energy exploitation.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
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IF 4.1
Yunqin Yang,QiuMing Liang,Tianwei Lei,Huan He,Tianquan Liang
The capacity of Co-free Li-rich Mn-based layered oxide decreases rapidly due to the irreversible lattice oxygen lose and the crystal structure change. The sodium modified cathode materials are synthesized via the sol–gel method and the electrochemical properties are investigated. Specifically, the first discharge capacity of Li 1.18 Na 0.02 Mn 0.54 Ni 0.26 O 2 is 150.5 mAh·g −1 at 2C, demonstrating a capacity preservation rate of 94.1 % after 100 cycles. And the diffusion coefficient of Li 1.18 Na 0.02 Mn 0.54 Ni 0.26 O 2 is 1.2152 × 10 -15 , which is better than 1.3798 × 10 -16 of the undoped material. This work demonstrates that appropriate Na + doping can stabilize the crystal structure, increase the lithium layer spacing and reduce the irrevocable escape of lattice oxygen within material.
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Energy Storage Materials
·
2024
·
IF 18.9
Dengxu Wu,Jian Peng,Zhiwen Jiang,Lei Zhu,Yujing Wu,Chang Xu,Zhixuan Wang,Ming Yang,Hong Li,Liquan Chen,Fan Wu
Lithium-metal batteries with solid electrolytes (SEs) have emerged as promising electrochemical energy storage devices due to high energy density and safety. However , inherent challenges of deleterious lithium dendrite growth and poor interfacial stability hinder their practical application. Herein , a new type of room-temperature liquidous Li metal arene complex—Li-Phenanthrene (Phen)-Ether is explored to enable a 3D LiSi@Li-Phen-Ether (3D LSLL) anode with low cost, high safety and high ion/electron-conductivity. Symmetric cells with sulfide SE and 3D LSLL anode deliver an ultra-high critical current density (> 13 mA cm −2 ) and long cycle life (> 1000 h, 0.25 mA cm −2 ). Moreover, full battery (LFP/sulfide SE/3D LSLL) can operate at low-external pressure (0.5 MPa) and ambient temperature by introducing a flexible cathode/sulfide interlayer with high ion conductivity (2 mS cm −1 ). This unprecedented battery configuration demonstrates high-rate (2C) performance and long cycle life (over 300 cycles), which exceeds preciously-reported sulfide SE/lithium batteries at low stack pressures, and may open up a promising route for high-energy-density, cost-effective and safe rechargeable lithium batteries.
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Surfaces and Interfaces
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2024
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IF 5.7
Rui You,Zhiyang He,Feng Xue,Shengui Ju
The lithium-ion sieve primarily exists in powder form, which poses challenges such as poor fluidity and permeability, as well as difficulties in recovery. The H₂TiO₃ (HTO) particles were introduced into polyacrylamide (PAM) via in situ polymerization to prepare a tough and porous nanocomposite hydrogel (HTO@PAM). This method effectively addresses the recovery difficulties associated with powdered lithium-ion sieves and, due to the hydrophilic groups in polyacrylamide, enhances the desorption of Li + and improves the adsorption performance. The results show that HTO@PAM-4 is the optimal ratio, with an adsorption performance of 32.8 mg/g. Tensile strength tests using a universal testing machine indicated that HTO@PAM-4 has a tensile strength of 0.19 MPa, demonstrating excellent mechanical properties. Infrared spectroscopy detected the presence of hydrophilic groups (-CONH 2 ) in HTO@PAM, and surface tension measurements showed a water contact angle of 8.9 °, indicating good hydrophilicity. The recyclability of HTO@PAM-4 was investigated, and after six cycles, the adsorption capacity was 25.4 mg/g, which is 77 % of the maximum adsorption performance, demonstrating recyclability. The results indicate that HTO@PAM exhibits excellent mechanical properties, adsorption performance, and recyclability, making it a material with promising practical applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xiaoke Luo,Di Wang,Shiyi Liu,Hailong Yan,Jinbing Cheng,Yang Lu,Deyang Zhang,Huan Pang
The redox reactions occurring at positive electrode of the lithium-sulfur (Li-S) batteries involve several key electrocatalytic processes that significantly impact the overall performance of the electrochemical energy storage system. This study presents a heterogeneous catalytic composite material composed of CoSe quantum dots (QDs) integrated with Sn 3 O 4 nanosheets, which enhances the overall ionic conductivity and accessibility of active sites within the cathode. This controlled migration effectively traps polysulfides within the cathode, reducing their dissolution into the electrolyte and mitigating the shuttle effect. Li-S batteries incorporating CoSe QDs/Sn 3 O 4 porous carbon nanofibers (PCNFs) demonstrate a high discharge capacity of 1596.9 mAh g −1 at 0.1 C, along with remarkable cycling stability, achieving 1500 cycles at 2 C with a minimal capacity decay of 0.024 % per cycle. Even under a high sulfur loading conditions of 8.61 mg cm −2 and a low electrolyte to sulfur ratio of approximately 4.6 μL mg −1 , the CoSe QDs/Sn 3 O 4 PCNFs cathode delivers an initial discharge-specific capacity of 732.0 mAh g −1 at 0.2 C. Through this method, we accomplished the size control and uniform distribution of CoSe QDs, and this method can be extended to the synthesis of other metal oxide and metal sulfide QDs, offering a novel idea for the application of QDs in polysulfide catalysis.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-15
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IF 15.7
Kong Lingchen,Li Yu,Peng Cong,Zhao Ziyue,Xiao Junwei,Zhao Yimin,Feng Wei
The development of disordered Li dendrite and the adverse reaction between Li and electrolyte impede practical use of Li metal batteries (LMB). Herein, we propose quasi-two-dimensional fluorinated metal-organic framework carbon (q2D-FcMOF) that is utilized to construct artificial solid electrolyte interface (ASEI) to achieve robust interfacial protective double-layer. The outer organic layer provides ample space for Li deposition, while the inner inorganic LiF layer promotes conduction of Li + and blocks electron transport. Metal clusters within the hybrid layer are uniformly dispersed, encouraging Li + to cluster around metal active sites that are thermodynamically compatible with Li. Consequently, q2D-FcZ8@Li symmetrical batteries demonstrate an ultralong cycle life over 3600 h. When paried with commercial cathodes, the cells exhibite cyclability under conditions of high-loading, lean-electrolyte, even exposure to air for some time. This research suggests an effective method for fabricating ASEI using 2D quasi-ordered superstructure MOF NPs, which is expected to the development of LMB.
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Progress in Natural Science-Materials International
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2024
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IF 4.8
Yuan Li,Pengfei Huang,Chunyu Cui,Xiaoyuan Ma,Li Chen,Zekun Li,Linhai Li,Yuhong Tian
Li metal batteries (LMBs) have attracted much attention due to the ultra-high theoretical capacity of the Li metal anode (LMA). However, the uncontrollable dendrites growth and low coulombic efficiency hinder their practical application. Here, we explore 3,5-difluoropyridine (2F-BD) as a novel electrolyte additive to enable high-performance LMBs. The 2F-BD additive participates in and modifies the solvation structure of Li ions by reducing the coordinated number of PF 6 − at the electrode surface , leading to the formation of a LiF and Li 3 N-rich solid electrolyte interphase (SEI). The LiF component increases the robustness of SEI and suppresses the formation of Li dendrites, while the Li 3 N component facilitates the transportation and reaction kinetics of Li ions . As a result, the Li||Li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA cm −2 . After coupling with LiFePO 4 cathode, the obtained full cell achieves high specific capacities of 106.06 mA h g −1 and 84.98 mA h g −1 at 2.55 mA cm −2 and 5.10 mA cm −2 , respectively, and maintains a high capacity retention of 84.0% after 1000 cycles at 0.13 mA cm −2 , with an average cycling CE of 99.58%.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Xin Jiang,Zhaopeng Hu,Shichao Xu,Bin Hu,Benteng Liu,Qiao Li,Yihu Song,Qiang Zheng
Stretchable electromagnetic shields have garnered significant attention in the burgeoning field of flexible devices, while traditional strategies developed to maintain adequate electromagnetic shielding performance under large strains are more challenging at low temperatures. Herein, elastic electromagnetic shielding films with segregated conductive network were produced by an extremely simple method of evaporating carboxylated nitrile butadiene rubber latex containing lithium bis(trifloromethanesulfonyl)imide doped poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate). The films of 0.2 mm in thickness are highly stretchable at −20 °C and exhibit an electromagnetic interference shielding efficiency of more than 30 dB at 100 % strain and −10 °C. These properties underscore the potential of the films as effective stretchable EMI shields in low-temperature conditions. Experiments demonstrating the films' ability to block Bluetooth signals from ESP32 chip microcontrollers and electromagnetic waves from Tesla coils further confirm their usefulness, highlighting the practicality of protecting flexible devices in cold environments.
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DESALINATION
·
2024
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IF 8.3
Ruzhen Zhao,Manxing Huo,Qifeng Wei,Xiulian Ren,Yongming Zhu
Efficient extraction of lithium and boron resources from salt-lakes is a prominent topic of research among scholars. In this study, a process route for the simultaneous extraction of lithium and boric acid was employed, followed by their separation through stepwise stripping. During the experiments, a coupling effect in the extraction of Li + and H 3 BO 3 was found, leading to an in-depth investigation of their mutual promotion mechanisms. Three significant patterns have been clearly verified through experiments, molecular dynamics simulations and quantum chemical calculations: First, the acidic extractant N221 can not only extract Li + , but also enhance the extraction of H 3 BO 3 ; Second, mono-fatty alcohol R-OH as dilute can effectively extract H 3 BO 3 while also promoting the extraction of Li + . Lastly, Li + and H 3 BO 3 can mutually promote each other's extraction. Using the Qinghai old brine, N221 system achieved a 99 % extraction efficiency for H 3 BO 3 , with an initial lithium extraction of 97 %, around 80 % in subsequent rounds. This paper proposes an effective method for the extraction of Li + and boric acid, and thoroughly studied the mechanism of their mutual promotion of extraction. This research offers new insights into the comprehensive utilization of salt-lake resources.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xu-Wei Luo,Ming-Ran Zhou,Mao-Jin Ran,Dao-Xiang Xun,Jia-Le He,Zhi-Yi Hu,Hemdan S.H. Mohamed,Jing Liu,Li-Hua Chen,Yu Li,Bao-Lian Su
Lithium-selenium (Li-Se) batteries have attracted increasing attention because of excellent carbonate electrolyte compatibility, comparable theoretical volumetric specific capacity and high electrical conductivity. However, there are still unavoidable issues such as large volume expansion, rapid capacity decay and slow electrochemical reaction kinetics for practical applications. In this work, we report 2D ZIF-8 derived N-doped porous carbon nanosheets (NPC-NS) as Se host for high-performance Li-Se batteries. The unique 2D structure of Se@NPC-NS facilitates Li + diffusion and charge transfer, thus the Se@NPC-NS cathode exhibits fast electrochemical reaction kinetics. In addition, the N doping enhances electronic conductivity and porous structure mitigates the volume expansion. As a result, the Se@NPC-NS cathode delivers a high reversible capacity of 585 mAh/g with a capacity retention of 99.1 % at 0.5C (1C = 675 mA g −1 ) after 225 cycles. Especially after 500 cycles at a high current density of 10C, the Se@NPC-NS cathode still displays a reversible specific capacity of 307 mAh/g with only 0.03 % capacity decay per cycle. This work would shed some light on the 2D carbon host as Se-based cathode for high-rate and long-life performance Li-Se batteries.
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CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Jiafeng He,Hu Hong,Qi Feng,Xiaoke Wang,Xiliang Zhao,Minwei Xu,Xiang Wu,Hongfei Li,Chunyi Zhi,Cuiping Han
The urgent demand for high-energy and high-power energy storage devices initiates considerable interest for Li-O 2 batteries. Considering the catalytic reaction that happened on the cathode, the electrocatalyst plays a key role in deciding the performance of Li-O 2 batteries. Herein, a cobalt polyphthalocyanine with defective polymeric layered structure (D-CoPPc) is prepared by an annealing treatment. The macromolecular structure of D-CoPPc overcomes the dissolution of cobalt phthalocyanine (CoPc) therefore guarantying structural stability. Such a distinctive structure provides imperative features for Li-O 2 batteries involving the intrinsic high catalytic activity of CoPc unit, high conductivity given by π-π extended conjugated skeleton. Moreover, the introduced irregular structural defects are expected to promote the diffusion of oxygen. As a result, Li-O 2 battery with D-CoPPc as a catalyst achieves a high specific capacity of 4.0 mA h cm −2 at a current density of 50 μA cm −2 , a remarkable rate capability with the discharge voltage reached at 2.55 V at a current density of 500 μA cm −2 , and a superior cycling stability of more than 1000 h at 20 μA cm −2 . As such, the presented framework tailoring and defect engineering strategy open new avenues to regulate the catalytic activity for high-performance metal–oxygen batteries.
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