CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Rupeng Zhang,Can Cui,Rang Xiao,L. Ruinan,Tiansheng Mu,Hua Huo,Yulin Ma,Geping Yin,Pengjian Zuo
The Mg-metal batteries (MMBs) as a forceful competitor for Li-metal batteries (LMBs) have the advantages of high-safety and high-volume energy density . Whereas, the MMBs still confronts two vital issues to be addressed, including the incompatibility of conventional TFSI-based electrolytes with the Mg electrode and the poor reversibility of the cathode. In this work, to satisfyingly settle the incompatibility, an artificial interphase was first pre-constructed by high-temperature displacement reaction of CuCl 2 and Mg metal, responsible for the faster charge-transfer rate and the lower Mg plating/stripping overpotential (∼0.2 V) in Mg symmetric cells. Regarding the Mg-Mo 6 S 8 full cells, to enhance the reversibility and rate performance, Mg/Li hybrid batteries were designed. Consequently, the Mg-Mo 6 S 8 battery can achieve excellent cycle stability and deliver a desirable capacity. Even as the current density increases to 1C, the battery still shows a desirable capacity of 92 mAh g −1 over 500 cycles.
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高影响因子
Small Methods
·
2024
·Vol. 9
·期 4
·2401310
·
IF 10.7
Qing Zhu,Enzi Chen,Kezhou Fan,Junhao Tang,Runze Zhan,Kam Sing Wong,Zefeng Chen,Xi Wan,Kun Chen
Janus transition metal dichalcogenides (TMDs) are a novel class of 2D materials with unique mirror asymmetry. Plasma-assisted synthesis at room temperature is favored for producing Janus TMDs due to its energy efficiency and prevention of alloying. However, current methods require stringent control over growth conditions, risking defects or unintended materials. A robust plasma-assisted (RPA) synthesis strategy is introduced, incorporating a built-in tube with a suitable inner diameter into the plasma-assisted system. This innovation creates a mild, uniform plasma atmosphere, allowing for broader variations in growth parameters without significantly affecting Janus MoSSe's morphology and characteristics. This approach simplifies the synthesis process and enhances the success rate of Janus TMD production. Additionally, methods are explored to enhance the photoluminescence (PL) of Janus MoSSe. Releasing MoSSe from the growth substrate and annealing it removes strain and unintentional doping, improving PL performance. MoSSe on hexagonal boron nitride ( h -BN) flakes after annealing shows a 32-fold increase in PL intensity. Bis(trifluoromethane) sulfonimide (TFSI) treatment of MoSSe results in a remarkable 70-fold increase in PL intensity, a 2.5-fold extension in exciton lifetime, and quantum yield (QY) reaching up to ≈31.2%. These findings provide critical insights for optimizing the luminescence properties of 2D Janus materials, advancing Janus optoelectronics.
研究领域:
材料科学
·
光学
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DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 9.8
Mingdong Du,Yanxia Liu,Chenxing Wang,Fulai Qi,Mingyu Shi,Wenjing Liu,Shengnan He,Zhijun Wu,Zhenglong Li,Chenchen Li,Hongge Pan
Lithium (Li) metal is the ideal anode material for building future large-scale energy storage batteries. Nevertheless, Li metal anodes suffer from incompatibility with conventional carbonate-based electrolytes, which possibly leads to severe Li dendrite growth, undesirable electrolyte decomposition, and rapid deterioration of the cycling performance. To address these challenges, the traditional commercial electrolyte is doped with cerium bis(trifluoromethanesulfonyl)imide (Ce(TFSI) 3 ) for enhanced Li anode stability. The low migration rate of Ce 3+ leads to formation of a Ce-enriched corrosion resistant solid electrolyte interphase (SEI), while the TFSI − anion enables a significant enhancement of inorganic components within the SEI, thus facilitating uniform Li + deposition and mitigation of detrimental electrolyte decomposition. The resulting electrolyte exhibits superior electrochemical stability against Li anodes. This is evidenced by a Li||Li symmetric cell that cycles steadily for over 1300 h at a current density of 1 mA cm −2 and a capacity of 1 mAh cm −2 , along with a exchange current density of 1.3183 mA cm −2 . Additionally, Li||LiFePO 4 full cell demonstrates 76.8% capacity retention (110.39 mA cm −2 ) after 900 cycles at 1 C. This work illustrates the significant impact of a corrosion-resistant interface on Li anode performance and offers a valuable idea for constructing high-durability SEI layers.
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高影响因子
POLYMER
·
2025
·
IF 4.5
Zhanpeng Xu,Kang Li,Huihui Xu,Tingzi Yan,Yongjin Li
This study utilized a straightforward one-step method, melt extrusion , to blend polymethyl methacrylate (PMMA) with 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene (BPEF) to fabricate optically transparent polymer blends , utilizing Mg(TFSI) 2 as the catalyst for the ester exchange reaction. All polymer blends demonstrated excellent mechanical and optical properties , achieving high transparency (≥90 %) in the visible spectrum. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) results indicated that the blends formed a thermodynamically homogeneous system. Additionally, gel permeation chromatography (GPC) confirmed the occurrence of ester exchange reactions between PMMA and BPEF in both salted and unsalted blends. Very interestingly, without Mg(TFSI) 2 one hydroxyl group of BPEF is linked to PMMA side group through transesterification reaction, leading to a zero birefringence . Nonetheless, the inclusion of Mg(TFSI) 2 appears to facilitate the ester exchange reaction between both hydroxyl groups of BPEF and a single PMMA chain, which causes a cyclic ring structure. Such cyclic ring structure orients parallel to the planar plan, which then increases n // and also Δn.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Qingguo Zhang,Sihan Feng,Xinyuan Zhang,Ying Wei
Two novel ionic-liquid-based binary mixture systems of N,N-diethyl-N-(2-methoxyethyl)- N -methylammonium tetrafluoroborate ([DEME][BF 4 ]), or N,N-diethyl- N -methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethylsulfonyl)imide ([DEME][TFSI]) + γ-butyrolactone (GBL) are prepared over the whole concentration range (mole fraction from 0–1). Some important thermodynamic properties and parameters of the pure ILs and two systems were measured and calculated. The temperature dependences of the transport properties (viscosity and conductivity) were described by the Vogel–Fulcher–Tamman (VFT) equation. The excess molar volumes ( V E ) were obtained from the experimental densities and fitted to Redlich–Kister (R–K) polynomial equation. The DSC analysis, the shifts of the infrared (IR) spectrum, and COSMO–RS methodology based on DFT calculations were combined to explain the interaction information of GBL molecules and cations/anions of the selected systems. The stable optimized structures, interaction energies, and charge distributions were further obtained. Those maybe slight enlighten the application of similar mixture systems in future.
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高影响因子
POLYMER
·
2023
·
IF 4.6
Ying Wei,Wei Chen,Xinyi Ge,Jiayi Liang,Zheng Xing,Qingguo Zhang,Zhong-Xia Wang
Ionogel electrolytes (IGEs) with chemical and thermal stability properties have attracted considerable attention for all-solid-state energy storage devices, particularly for high-performance supercapacitors (SCs). However, achieving high conductivity, flexibility, and toughness, as well as deformation and impact resistance in special cases, is challenging with the typical polymer based on ionic liquids (ILs). Here, an effective gelation strategy is proposed for the preparation of free-standing LiTFSI/[EMIM][TFSI]/PVDF-HFP ionogels (IGs) by double-additive induced physical cross-linking. The mechanical and electrochemical properties of the IGs can be synergistically optimized by the cross-linking and entanglement of LiTFSI and [EMIM][TFSI] with the PVDF-HFP network. The target IGs simultaneously exhibit excellent deformation capacity (over 50 %), high ionic conductivity (10.3 × 10 −3 S cm −1 at 25 °C), hardness (H: 728.6 kPa), and Young's modulus (E: 11.4 MPa), which can exhibit the specific capacitance of 274. 55 F g −1 , energy density of 38.13 Wh kg −1 and maximum power density of 2499.93 W kg −1 in the fabricated symmetric supercapacitor . The results will motivate us to further explore their applications for flexible electronic devices, wearable electronic skin, and flexible energy storage.
研究领域:
材料科学
·
电化学
·
高分子物理
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能源存储
·
柔性电子学
·
纳米复合材料
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2023
·Vol. 36
·期 2
·231-231
·
IF 1
Liu Xu-hao,Liu Yang-yang,Zhu Rong-zhi,Liu Lu-jie,Xu Chen-xin,Cao Hui
Metal-halide perovskite solar cells (PSCs) have attracted considerable attention during the past decade. However, due to the existence of non-radiative recombination losses, the best power conversion efficiency (PCE) is still lower than the theoretical limit defined by Shockley-Queser theory. In this work, we investigate 1,2,3-oxathiazin-4(3h)-one, 6-methyl-2,2-dioxide (acesulfame potassium, abbreviated as AK) as a additional dopant for the 2,2′,7,7′-tetrakis( N , N -di-p-methoxyphenyl-amine)-9,9′-spirobifluorene (Spiro-OMeTAD) and fabricate PSCs in the air. It is found that 12 mol% fraction of AK relative to lithium bis((trifluoromethyl)sulfonyl)-amide (Li-TFSI) reduces the non-radiative recombination from 86.05% to 69.23%, resulting in an average 0.08 V of V oc enhancement. The champion solar cell gives a perovskite solar cells up to 21.9% and over 84% retention of the initial value during 720 h aging in dry air with 20%–30% humidity.
研究领域:
材料科学
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可再生能源
·
光伏技术
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DOI
高影响因子
Energy Advances
·
2022
·Vol. 1
·期 12
·1028-1034
·
IF 0
Lei He,Jian-Hua Cao,Ya-Kun Wang,Da-Yong Wu
Increasing the proportion of inorganic electrolytes in organic–inorganic composite electrolytes can significantly improve the ionic conductivity of composite electrolytes. However, this method is confronted with some problems, such as the uneven dispersion of inorganic electrolytes and the aggregation of nanoparticles, which results in a worse performance of the electrolytes’ interface. In this study, we had the dopamine hydrochloride molecules self-polymerized on the surface of inorganic ionic conductor lithium titanium aluminum phosphate (LATP) particles to obtain PDA-coated LATP nanoparticles. Then, the coated LATP particles were composited with PEO at a ratio of 80 : 20, with the LATP's evenly dispersed in the PEO, and no aggregation happened. On adding a small amount of electrolyte (5 μL cm−2, 1 M Li TFSI), the ionic conductivity of the electrospun PI-loaded PEO0.2–PDA@LATP0.8 flexible composite solid electrolyte reached 2.07 × 10−4 at 30 °C and 2.05 × 10−3 S cm−1 at 80 °C. NCM811‖Li batteries assembled with this electrolyte had an initial discharge capacity of 178.0 mA h g−1 at 30 °C, and still remained at 172.1 mA h g−1 (96.7%) after 200 cycles. The research shows that there are three main conduction pathways of Li+ in this electrolyte: through the segments of the polymer chains, through the interface between the polymer and inorganic ionic conductor, and through the passage composed of a continuous inorganic ionic conductor. Further results show that the coating of LATP by PDA does not block the transmission of Li+ both inside the crystal and at the crystal interface of LATP.
研究领域:
材料科学
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电化学
·
能源存储
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DOI
Chemistry-An Asian Journal
·
2022
·Vol. 17
·期 22
·e202200839
·
IF 4.839
Weijie Liu,Jianbo Jiang,Zhihao Yang,Yang Liu,Zhengfei Yang,Manman Bu,Shuangxiong Liao,Weiying Wu,Tieqi Huang,Shangbin Sang,Hongtao Liu
Solid polymer electrolytes using poly(ethylene oxide) (PEO) as matrix are mostly applied due to the superior Li + transfer ability of oxyethyl chain. However, the high crystallinity, low oxidation potential window, and insufficient mechanical strength hinder PEO deployment in solid-state batteries. Here, a novel composite solid electrolyte combined PEO with a lithium-doped high-entropy oxide (Li 0.25 HEO) ceramic powder is presented, which exhibits excellent properties for solid-state lithium metal battery applications. On one hand, the rich oxygen vacancies of Li 0.25 HEO surface are favorable to capturing anionic groups (e. g. TFSI − ), reinforcing the Li + dissociation. On the other hand, Li 0.25 HEO with abundant Lewis acid sites markedly promotes the PEO oxidation potential window. Additionally, the incorporation of Li 0.25 HEO ceramic powder can effectively inhibit the PEO crystallization and enhance the mechanic strength of the composite electrolyte as well. The assembled solid-state lithium metal battery based on the composite solid electrolyte exhibits high rate capacity and durable cycle performance, showing potential development and application prospects.
研究领域:
材料科学
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电化学
·
电池技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jianmei Jiang,Yaoming Xiao,Wenjing Yang,Chao Wen,Biye Liu,Lidan Wang,Yunpeng Xu,Xue Zhang,Qixin Zhuang,Jinguo Lin,Zisheng Su,Jeng-Yu Lin
Although the efficiency of perovskite solar cells (PSCs) keeps breaking new records, their stability and cost are still limited by using the conventional hole transport material of 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD). Herein, we use 3,4-ethylenedioxythiophene (EDOT) as a solubilizer to enhance the dissolution of lithium bis(trifluoromethane)sulfonylimide (Li-TFSI) and reduce the 4-tert-bultypyridine (TBP) dosage. Then, EDOT undergoes in situ oxidative polymerization to generate PEDOT by an oxidizing agent of iodine (I2). Moreover, I2 can also accelerate the oxidation of Spiro-OMeTAD. Therefore, the generated PEDOT can synergistically enhance hole transport capability with the oxidized Spiro-OMeTAD, and the generated I– ions can compensate for the I vacancies and inhibit the migration of I– in the perovskite film, resulting in an enhanced stability and efficiency of PSCs. A PSC based on the composite hole transport system achieves a power conversion efficiency (PCE) of 24.79%. Moreover, the PSC retains 92% of its initial PCE for over 2000 h under ambient conditions of 25 °C and 35% relative humidity. Furthermore, the quantities of Spiro-OMeTAD and TBP have, respectively, decreased by 24.9 and 37.5% in the composite hole transport system, thereby lowering the production cost of the PSC and facilitating its industrialization development.
研究领域:
材料科学
·
光伏技术
·
高分子化学
·
纳米技术
·
能源技术
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产品关联
DOI
PubMed
高影响因子
Small Methods
·
2023
·
IF 12.4
Xuejun Zhou,Guyue Li,Yifan Yu,Meng Lei,Keyi Chen,Chilin Li
Magnesium metal batteries (MMBs) currently face challenges suffering from severe Mg metal passivation and extremely high overpotential in conventional electrolytes. Herein, a strategy of using a low-cost deep eutectic solution (DES) is proposed to modify Mg anode with the monolithic and compact coating of a MgCl 2 -Al-MgCl 2 sandwich structure, enabling the stable and reversible Mg plating–stripping behavior. An organic/nanocrystal hybrid interphase is in-situ built through a facile Mg-Al displacement reaction between aluminum-chloro clusters and Mg in AlCl 3 /Et 3 NHCl solution, and it can effectively minimize the adverse interfacial passivation reaction and surface diffusion barrier, affording the high ion-conduction and electronic insulation. This DES-assisted method guarantees a highly reversible cycling of Mg metal anode (over 5000 h at 0.1 mA cm −2 and 400 h at 2.0 mAh cm −2 ) in Mg(TFSI) 2 /DME electrolyte with the improved interfacial kinetics and low overpotential. Even at a much higher current density of 1 mA cm −2 , the overpotential only undergoes a slight increase from 0.2 V (at 0.1 mA cm −2 ) to 0.23 V. The corresponding full cells with CuS and phenanthraquinone cathodes deliver satisfactory cyclic performance. The DES modification strategy provides a new solution to the design of robust and conductive solid electrolyte interphase for achieving high-voltage and durable MMBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
电池技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Mengli Tao,Guangyuan Du,Wenwu Zou,Jiaqi Cao,Wei Li,Guangli Zheng,Zhenxing Liang,Zhiming Cui,Li Du,Huiyu Song
The performance of thin lithium metal anodes is affected due to issues that weaken the electrode-electrolyte interphase. In this work, a coating layer serving as a Li + traffic controller based on hexadecyl trimethyl ammonium bis(trifluoromethanesulphonyl)imide ([CTA][TFSI]) and poly (vinylidene difluoride co-hexafluoropropylene) (P(VDF-HFP)) is used to stabilize the thin lithium metal interface. The CTA + ions in the coating layer can effectively regulate the distribution of Li + concentration to promote uniform deposition of lithium. The anion of [CTA][TFSI] can optimize solid electrolyte interphase (SEI) with inorganic-rich components, which improve the ionic conductivity and reaction kinetics. Furthermore, the flexible polymer skeleton can fortify the fragile SEI, facilitating the consistent operation of the battery. Due to these improvements, a thin Li metal anode (4 mAh cm −2 ) with a coating layer in a Li||Li symmetric cell demonstrates a lifespan of 600 h at 1 mA cm −2 and 1 mAh cm −2 . Notably, full cells with an ultra-low negative electrode/positive electrode = 1 (N/P = 1) demonstrate a stable performance over 200 cycles and 90 cycles at 0.5C and 1C (1C = 170 mA g −1 ), respectively.
研究领域:
材料科学
·
电化学
·
电池技术
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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）