Solid State Ionics最新文献

Molecular dynamics simulation of water absorption and mechanical weakening in coal rocks based on Monte Carlo methods 基于蒙特卡洛方法的煤岩吸水和机械削弱的分子动力学模拟

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics

Pub Date : 2024-11-25 DOI: 10.1016/j.ssi.2024.116743

Lifan Jiao , ChaoYu Hao , Dong Duan , WeiDong Lu , YuanPing Gan , Jiaji Qi , WangRui Yang , YanKun Chen

Aiming at the problem of roadway destabilization in water encountered in the roadway of the back mining roadway of an extra-thick coal seam in Xinjiang Dabei Coal Mine, this paper used molecular dynamics simulation to study the interaction between coal and water and analyzed the adsorption characteristics of water molecules and the change of mechanical properties of coal. Firstly, the model of C₁₈₁H₁₃₈N₂O₂₄ bituminous coal was constructed by test, the coal-water adsorption was simulated based on the Monte Carlo method, and the coal-water adsorption configuration was analyzed. The results showed that: the saturation adsorption capacity was about 60 water molecules/cell, and the water molecule adsorption was concentrated in the vicinity of oxygen-containing groups and hydrogen atoms; the increase of water molecule content led to the decrease of heat of adsorption and diffusion capacity, and the heat of adsorption decreased by 9.1 %, and the diffusion coefficient of the early stage of adsorption was about three times of that of the final stage; the mechanical parameters of the coal body were significantly decreased, and the bulk modulus, Young's modulus, and shear modulus were respectively decreased by 21.90 %, 36.76 %, and 38.87 %, Poisson's ratio increased by 14.81 %, Poisson's ratio variability was low, volumetric modulus variability was medium, Young's modulus and shear modulus variability was high. The decrease in strength after coal water adsorption is due to the significant volume expansion of the coal body, the saturation expansion rate reaches 12.47 %, and at the same time, the total energy of the coal model decreases, where the weakening effect produced by the changes in the bonding and non-bonding energies results in the decrease in the mechanical strength of the coal molecules, and the weakening of the stability of the coal rock. The results of the study reveal the deformation and damage mechanism of the softening and deformation of the back-mining roadway in contact with water in Xinjiang Dabei Coal Mine, which provides a basis for the subsequent disaster prevention and control.

针对新疆大北煤矿特厚煤层回采巷道遇水巷道失稳问题，本文采用分子动力学模拟研究了煤与水的相互作用，分析了水分子的吸附特性和煤的力学性能变化。首先，通过试验构建了C181H138N2O24烟煤模型，基于蒙特卡洛法模拟了煤与水的吸附，分析了煤与水的吸附构型。结果表明：饱和吸附容量约为 60 个水分子/胞，水分子吸附集中在含氧基团和氢原子附近；水分子含量的增加导致吸附热量和扩散量的降低，吸附热量降低了 9.1 %，吸附初期的扩散系数约为吸附末期的3倍；煤体力学参数显著降低，体积模量、杨氏模量和剪切模量分别降低了21.90 %、36.76 %和38.87 %，泊松比增加了14.81 %，泊松比变异性低，体积模量变异性中等，杨氏模量和剪切模量变异性高。煤吸水后强度下降的原因是煤体体积显著膨胀，饱和膨胀率达到 12.47 %，同时煤模型总能量下降，其中键能和非键能变化产生的削弱效应导致煤分子机械强度下降，煤岩稳定性减弱。研究结果揭示了新疆大北煤矿回采巷道遇水软化变形破坏机理，为后续灾害防治提供了依据。

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引用次数: 0

Study on the mechanism of liquid-phase regulated preparation of battery-grade iron phosphate 电池级磷酸铁的液相调控制备机理研究

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics

Pub Date : 2024-11-23 DOI: 10.1016/j.ssi.2024.116740

Haijing Cui , Changjiang Yang , Yankun Wang , Zehang Qin , Jun Chang

LiFePO₄ batteries play a crucial role in energy storage and electric vehicles, with their precursor, FePO₄, directly determining the electrochemical performance of LiFePO₄. The key to preparing high-quality FePO₄ is the precise regulation of crystal morphology. This study investigates the inter-ionic interaction of Fe³⁺ in a complex phosphate system to form monoclinic FePO₄ with high crystallinity by precisely controlling process parameters such as pH and reaction temperature. The optimized process parameters are as follows: during the leaching stage, a P/Fe feeding ratio of 3:1 and a reaction temperature of 90 °C; during the oxidation stage, a 140 % excess of H₂O₂ and a reaction temperature of 50 °C; and during the crystallization stage, a pH of 1.5 and a reaction temperature of 90 °C, with an aging time of 1 h. The resulting FePO₄ has a round cake morphology with a diameter of approximately 1.5 μm and a thickness of about 0.5 μm. The particle size distribution is narrow, with a D₅₀ of 2.64 μm. The products exhibit consistent crystalline morphology, high crystallinity, an Fe content of 36.595 %, a P content of 20.676 %, and an Fe/P ratio of 0.981. The synthesized LiFePO₄/C derived from this FePO₄ shows a discharge capacity of 154 mAh/g at 0.2C. The proposed preparation mechanism has significant theoretical implications for the efficient and environmentally friendly production of FePO₄ in the industry.

磷酸铁锂电池在储能和电动汽车中发挥着至关重要的作用，其前驱体磷酸铁直接决定了磷酸铁锂电池的电化学性能。制备高质量磷酸铁锂的关键是精确调节晶体形态。本研究通过精确控制 pH 值和反应温度等工艺参数，研究了复杂磷酸盐体系中 Fe3+ 的离子间相互作用，以形成具有高结晶度的单斜 FePO4。优化的工艺参数如下：在浸出阶段，P/Fe 进料比为 3:1，反应温度为 90 °C；在氧化阶段，过量的 H2O2 为 140 %，反应温度为 50 °C；在结晶阶段，pH 为 1.5，反应温度为 90 °C，老化时间为 1 h。粒度分布较窄，D50 为 2.64 μm。产品的结晶形态一致，结晶度高，铁含量为 36.595%，磷含量为 20.676%，铁磷比为 0.981。由这种 FePO4 合成的 LiFePO4/C 在 0.2C 下的放电容量为 154 mAh/g。所提出的制备机理对于在工业中高效、环保地生产 FePO4 具有重要的理论意义。

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引用次数: 0

Investigate the performance of Sm and Nb co-doping Sm1-xBaxFe0.9Nb0.1O3-δ symmetrical electrode for solid oxide fuel cells 研究用于固体氧化物燃料电池的 Sm1-xBaxFe0.9Nb0.1O3-δ 对称电极的 Sm 和 Nb 共掺杂性能

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics

Pub Date : 2024-11-22 DOI: 10.1016/j.ssi.2024.116741

Yunfei Li , Qian Zhai , Chengyi Wen , Chunling Lu , Dongchao Qiu , Bingbing Niu , Biao Wang

Sm and Nb co-doping Sm_1-xBa_xFe_0.9Nb_0.1O_3-δ (x = 0.05,0.10,0.15, abbreviated as SBFN05, SBFN10 and SBFN15) oxide was prepared and investigated as an electrode for symmetrical solid oxide fuel cells (SSOFCs). XRD results demonstrate that Sm_1-xBa_{_x}Fe_0.9Nb_0.1O_3-δ samples form a stable cubic perovskite structure both in air and in H₂ atmosphere. Among Sm_1-xBa_xFe_0.9Nb_0.1O_3-δ samples, SBFN05 exhibits the lowest polarization resistance (Rp) at 600–800 °C. At 800 °C, the Rp of SBFN05 symmetrical electrode is 0.021 Ω cm² in air and 0.2 Ω cm² in H₂, respectively. The Rp of SBFN05 electrode has good stability in air and in H₂ during 100 h short-term test. At 850 °C, The maximum power density of single cell with SBFN05 symmetrical electrode feed with H₂ fuel reaches 928.6 mWcm⁻². Compared with BaFeO_3-δ, SBFN05 has lower binding energy and its O 2P center is closer to Fermi energy, suggesting good structural stability and oxygen catalytic activity. The primary result suggests that SBFN05 is a potential candidate symmetrical electrode for IT-SOFCs.

制备了 Sm1-xBaxFe0.9Nb0.1O3-δ （x = 0.05、0.10、0.15，缩写为 SBFN05、SBFN10 和 SBFN15）氧化物，并将其作为对称固体氧化物燃料电池（SSOFC）的电极进行了研究。XRD 结果表明，Sm1-xBaxFe0.9Nb0.1O3-δ 样品在空气和 H2 大气中都形成了稳定的立方包晶结构。在 Sm1-xBaxFe0.9Nb0.1O3-δ 样品中，SBFN05 在 600-800 °C 时表现出最低的极化电阻（Rp）。在 800 °C 时，SBFN05 对称电极在空气中的 Rp 为 0.021 Ω cm2，在 H2 中的 Rp 为 0.2 Ω cm2。在 100 小时的短期试验中，SBFN05 电极在空气和 H2 中的 Rp 具有良好的稳定性。在 850 °C 时，使用 SBFN05 对称电极馈入 H2 燃料的单电池的最大功率密度达到 928.6 mWcm-2。与 BaFeO3-δ 相比，SBFN05 的结合能更低，其 O 2P 中心更接近费米能，这表明其具有良好的结构稳定性和氧催化活性。主要结果表明，SBFN05 是 IT-SOFCs 的潜在候选对称电极。

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引用次数: 0

Using machine learning towards enhancement of electrochemical activity in OER/ORR half-reactions of MXene cathode materials for Li-air batteries 利用机器学习提高锂空气电池 MXene 阴极材料 OER/ORR 半反应的电化学活性

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics

Pub Date : 2024-11-21 DOI: 10.1016/j.ssi.2024.116742

Natalia V. Kireeva, Aslan Yu Tsivadze

Metal-air batteries are the target of the ever-growing interest as considering as the new “lead” technology among the most promising electrochemical energy storage solutions. The projected energy density of lithium-air batteries considered in this study exceeds current commercial lithium-ion batteries by more than three times. In this study, we consider the characteristics of MXenes, 2D layered phases with such attractive characteristics as a high specific surface area with the numerous active reaction centers, mechanical strength, the diverse functional characteristics and the perspectives of scalability of their production, which are of importance for the practical realization of Li-air batteries of different architecture. The formation of the phases of complex content and structure inherent to pseudomorphism at the interface, as it is actual for the objects of our study, allows one to conclude that it is necessary to consider the processes that occur at the interfaces of lithium-air battery cathodes in direct relation to the cathode material used. Machine learning methods were involved in model development for (i) MXenes predicting the electrochemical phase diagrams, Pourbaix diagrams, which circumscribe the stability window of MXenes of certain composition formed with synthesis-defined terminations as a function of pH and U_SHE for single and double MXenes and (ii) the elastic characteristics of MAX phases, precursors of MXenes, to assess the commensurability of the interface of MXene cathode materials and Li₂O₂ phase as well as the prospects of using target MXene compositions combined with the solid electrolyte materials of different families for employing in all-solid-state Li-air batteries. The obtained models demonstrate high predictive performance that argue on the possibility to use them for rational screening of new phases with desired functional characteristics.

金属空气电池作为最有前途的电化学储能解决方案中的新 "领跑 "技术，是人们日益关注的目标。本研究中考虑的锂空气电池的预计能量密度比目前的商用锂离子电池高出三倍以上。在本研究中，我们考虑了二维层状相 MXenes 的特性，这些二维层状相具有极具吸引力的特性，如具有大量活性反应中心的高比表面积、机械强度、多种功能特性及其生产的可扩展性，这些特性对于实际实现不同结构的锂空气电池具有重要意义。根据我们研究对象的实际情况，在界面上形成伪形态所固有的复杂内容和结构的相，可以得出结论：有必要考虑锂空气电池正极界面上发生的与所用正极材料直接相关的过程。机器学习方法参与了以下方面的模型开发：(i) MXenes 的电化学相图预测、Pourbaix 图（Pourbaix 图描述了单 MXenes 和双 MXenes 在 pH 值和 USHE 的作用下与合成定义的终端形成的特定成分 MXenes 的稳定性窗口）；(ii) MAX 相的弹性特征、(ii) MXenes 的前体 MAX 相的弹性特性，以评估 MXene 阴极材料和 Li2O2 相界面的相容性，以及将目标 MXene 成分与不同系列的固体电解质材料结合用于全固态锂空气电池的前景。所获得的模型具有很高的预测性能，可以用于合理筛选具有所需功能特性的新相。

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引用次数: 0

H diffusion in Mg- and Be- doped ⍺Al2O3 (corundum) single crystals 掺镁和掺铍的 ⍺Al2O3（刚玉）单晶中的氢扩散

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics

Pub Date : 2024-11-21 DOI: 10.1016/j.ssi.2024.116730

Michael C. Jollands , Shiyun Jin , Daniel C. Jones , Roland Stalder

The diffusivity of hydrogen, as protons, in Mg- and Be-doped corundum has been determined from 544 to 1007 °C, by annealing single crystals in CO₂-H₂ or N₂-H₂ mixes at ambient pressure. The addition of hydrogen leads to decolorization of the crystals, which is attributed to the associated removal of electron holes. Spatially resolved semi-quantitative profiles of hydrogen concentration versus distance were recorded using Fourier transform infrared spectroscopy, and/or Cr luminescence lifetime spectroscopy. These show hydrogen diffusion associated with trapping by Mg or Be, which leads to characteristic step shaped (broadly sigmoidal) forms of concentration-distance profiles. Numerical modelling of this diffusion-plus-trapping process allows hydrogen diffusion coefficients to be extracted, which are several orders of magnitude higher than any diffusion coefficients that have been previously determined in this system. This discrepancy is attributed to previous studies not taking trapping behaviour into account. Re-analysis of some published data, now considering trapping, can explain a ∼ 4-5 orders of magnitude discrepancy in calculated diffusion coefficients.

通过在环境压力下将单晶体在 CO2-H2 或 N2-H2 混合气体中退火，测定了掺镁和掺铍刚玉中氢气（质子）在 544 ℃ 至 1007 ℃ 范围内的扩散率。氢的加入会导致晶体脱色，这是由于电子空穴的移除所致。利用傅立叶变换红外光谱和/或 Cr 发光寿命光谱记录了氢浓度随距离变化的空间分辨半定量曲线。这些结果表明，氢的扩散与镁或铍的捕获有关，从而导致浓度-距离曲线呈现出特征性的阶梯形（大致为正余弦形）。通过对这一扩散加捕获过程进行数值建模，可以提取出氢扩散系数，该系数比以前在该系统中测定的任何扩散系数都要高出几个数量级。造成这种差异的原因是以前的研究没有将捕获行为考虑在内。重新分析一些已发表的数据，现在考虑到了捕获行为，可以解释计算出的扩散系数在数量级上有 4 至 5 个数量级的差异。

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引用次数: 0

Enhancing ionic conductivity of LiSiPON thin films electrolytes: Overcoming synthesis challenges related to Li-migration in the precursor target 增强 LiSiPON 薄膜电解质的离子导电性：克服与前驱体目标中锂离子迁移有关的合成难题

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics

Pub Date : 2024-11-07 DOI: 10.1016/j.ssi.2024.116723

Rafael Bianchini Nuernberg , Annie-Kim Landry , Frédéric Le Cras , Brigitte Pecquenard Le Cras

Currently, amorphous LiPON prepared by magnetron sputtering is the most employed thin film electrolyte due to its ionic conductivity (∼10⁻⁶ S.cm⁻¹), negligible electronic conductivity, absence of grain boundaries and ability to passivate Li metal. Despite the outstanding cycling performance that this combination of properties enables, its moderate conductivity hinders the use microbatteries in Internet of Things applications due to the need for short but high current pulses during communication phases. To better meet this requirement, LiSiPON thin films with ionic conductivities more than ten times greater than that of LiPON have been synthesized, while encountering some challenges in controlling the composition and the reproducibility of the synthesis. Herein, we have synthesized LiSiPON thin films from a set of precursor targets having distinct lithium concentrations. The main results indicate that an increase in the lithium content in the target material significantly enhances its ionic conductivity. Curiously, the most conductive target results in lithium-deficient and poorly conductive thin films that are not particularly reproducible in terms of composition and electrical properties. Our results suggest that lithium migration away from the sputtered area (or racetrack), favored by the high ionic conductivity of the target, is the origin of the resulting Li-deficient films. Finally, we have succeeded in preparing LiSiPO targets with sufficiently low Li-ion conductivity that enable the reproducible deposition of highly conductive LiSiPON solid electrolytes.

目前，通过磁控溅射法制备的非晶锂离子电池是最常用的薄膜电解质，因为它具有离子导电性（∼10-6 S.cm-1）、可忽略不计的电子导电性、无晶界和钝化锂金属的能力。尽管这种特性组合具有出色的循环性能，但由于在通信阶段需要短而大的电流脉冲，其适中的导电性阻碍了微型电池在物联网应用中的使用。为了更好地满足这一要求，人们合成了离子电导率比 LiPON 高十倍以上的 LiSiPON 薄膜，但在合成的成分控制和可重复性方面遇到了一些挑战。在这里，我们用一组具有不同锂浓度的前驱体靶合成了 LiSiPON 薄膜。主要结果表明，靶材料中锂含量的增加会显著提高其离子导电性。奇怪的是，导电性最强的靶材产生的薄膜缺锂且导电性差，在成分和电气性能方面的可重复性也不高。我们的研究结果表明，锂从溅射区域（或赛道）向外迁移，而靶材的高离子导电性有利于锂的迁移，这就是产生缺锂薄膜的原因。最后，我们成功制备出了具有足够低锂离子电导率的 LiSiPO 靶材，从而实现了高导电性 LiSiPON 固体电解质的可重复沉积。

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引用次数: 0

Preface "Special Issue for the 21st International Conference on Solid State Protonic Conductors (SSPC-21)" 第 21 届国际固态质子导体会议（SSPC-21）特刊 "序言

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics

Pub Date : 2024-11-06 DOI: 10.1016/j.ssi.2024.116709

引用次数: 0

Enhancing cycling stability in Li-rich layered oxides by atomic layer deposition of LiNbO3 nanolayers 通过铌酸锂纳米层的原子层沉积提高富锂层状氧化物的循环稳定性

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics

Pub Date : 2024-11-05 DOI: 10.1016/j.ssi.2024.116727

Ao Li , Yuxin Zheng , Yujia Zhang , Zhixiong Li , Liang Yin , Hong Li

Lithium-rich layered oxides (LROs), serving as high-energy cathode materials for lithium-ion batteries (LIBs), possess significant drawbacks that hinder their widespread use in practical applications. While surface modification can effectively shield LRO from structural degradation, precisely designing the surface structure remains a big challenge. This study focuses on the fabrication of uniform and thickness-controlled LiNbO₃-coated nanostructures on the surface of LRO using the atomic layer deposition (ALD) technique. The LiNbO₃ nanostructures on the cathode surface not only bolster the structural and interfacial stability but also facilitate Li⁺ diffusion, enhancing the cycling stability and the rate capability of LRO. Specifically, the LRO modified with a 3 nm thick LiNbO₃ layer exhibited better capacity retention of 86.4 % after 200 cycles at 1C with a voltage decay rate of 2.86 mV per cycle, and a reversible discharge capacity of 88.1 mAh g⁻¹ at 10C, underscoring the crucial role of surface nanostructures in enhancing electrochemical performance. This research sheds light on the strategic design of nanostructures at the grain surface of advanced cathode materials for high-performance LIBs.

富锂层状氧化物（LROs）是锂离子电池（LIBs）的高能正极材料，但其显著的缺点阻碍了其在实际应用中的广泛使用。虽然表面改性可以有效防止 LRO 的结构退化，但精确设计表面结构仍然是一个巨大的挑战。本研究的重点是利用原子层沉积（ALD）技术在 LRO 表面制备均匀且厚度可控的 LiNbO3 涂层纳米结构。阴极表面的 LiNbO3 纳米结构不仅增强了结构和界面的稳定性，还促进了 Li+ 的扩散，提高了 LRO 的循环稳定性和速率能力。具体而言，经 3 nm 厚的 LiNbO3 层修饰的 LRO 在 1C 下循环 200 次后的容量保持率为 86.4%，电压衰减率为 2.86 mV/次，在 10C 下的可逆放电容量为 88.1 mAh g-1，这突出表明了表面纳米结构在提高电化学性能方面的关键作用。这项研究揭示了在先进阴极材料晶粒表面设计纳米结构以实现高性能锂离子电池的策略。

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引用次数: 0

Performance improvement tactics of sensitized solar cells based on CuInS2 quantum dots prepared by high temperature hot injection 基于高温热注入法制备的 CuInS2 量子点的敏化太阳能电池的性能改进战术

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics

Pub Date : 2024-11-02 DOI: 10.1016/j.ssi.2024.116731

Yushan Li, Jiao Men, Guangyan Zhou, Yanhong Qiao, Jingbo Zhang

To reveal the ways and causes of conversion efficiency enhancement for quantum dot-sensitized solar cells (QDSSCs), chalcopyrite structure CuInS₂ quantum dots (QDs) was synthesized in oil phase by the high temperature hot injection method. Then, QDs were transferred from oil phase to water phase with 3-mercaptopropionic acid as a ligand exchange reagent and loaded inducer of QDs. 3-mercaptopropionic acid coated QDs in water phase were sensitized on TiO₂ nanocrystalline thin films to fabricate QDSSCs. The sensitization time of QDs and pH value in QDs solution are two important factors to affect the loading amounts of QDs and performance of the final assembled QDSSCs. Long-time sensitization of QDs on the TiO₂ porous thin film will cause QDs to agglomerate and stack on the film. The pH of QDs aqueous solution influences the stable existence in solution of QDs and adsorption on the surface of TiO₂. By balancing the influence of the above two factors, the optimal sensitization condition of CuInS₂ QDs is adsorption in pH = 11 QDs solution for 2 h. In addition, the interface between QD-sensitized TiO₂ porous thin film and FTO is another factor to affect the photoelectric conversion efficiency of QDSSCs. By adding Zn-doped TiO₂ compact layer with high conductivity and electron mobility on QDSSCs to modify this interface, the photoelectric conversion efficiency of QDSSCs was further increased by 66.4 %.

为了揭示量子点敏化太阳能电池（QDSSC）转换效率提高的途径和原因，采用高温热注入法在油相合成了黄铜矿结构的 CuInS2 量子点（QDs）。然后，用 3-巯基丙酸作为配体交换试剂和 QDs 负载诱导剂，将 QDs 从油相转移到水相。水相中的 3-巯基丙酸涂层 QDs 被敏化在 TiO2 纳米晶薄膜上，制成了 QDSSC。QDs的敏化时间和QDs溶液的pH值是影响QDs负载量和最终组装的QDSSC性能的两个重要因素。QDs 在 TiO2 多孔薄膜上的长时间敏化会导致 QDs 在薄膜上聚集和堆积。QDs 水溶液的 pH 值会影响 QDs 在溶液中的稳定存在和在 TiO2 表面的吸附。通过平衡上述两个因素的影响，CuInS2 QDs 的最佳敏化条件是在 pH = 11 的 QDs 溶液中吸附 2 小时。此外，QD 敏化 TiO2 多孔薄膜与 FTO 之间的界面也是影响 QDSSC 光电转换效率的另一个因素。通过在 QDSSC 上添加具有高导电性和电子迁移率的 Zn 掺杂 TiO2 致密层来改变该界面，QDSSC 的光电转换效率进一步提高了 66.4%。

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引用次数: 0

Synthesis and electrochemical properties of Li+-ion conducting solid electrolytes in the system xLiCl·(25-x)LiBr·75Li3PS4 xLiCl-(25-x)LiBr-75Li3PS4体系中锂离子传导固体电解质的合成与电化学特性

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics

Pub Date : 2024-11-01 DOI: 10.1016/j.ssi.2024.116725

Jeffy Jeffy, Nobuya Machida

The sulfide solid electrolyte xLiCl·(25-x)LiBr·75Li₃PS₄ was synthesized by a two-step glass-ceramic method. In the first step, amorphous precursors were obtained by a high-energy ball-milling method, and in the second step, the obtained precursors were heated up to a temperature in the range of 165 to 180 °C in order to obtain crystalline samples. The LGPS-like crystalline phase was precipitated in the heat-treated samples in the 0 < x < 12.5 composition range. The glass-ceramic samples showed high ion conductivities of 3 × 10⁻³ to 4 × 10⁻³ S cm⁻¹ at 25 °C. A charge-discharge test was conducted on an all-solid-state test cell using the 7.5LiCl·17.5LiBr·75Li₃PS₄ (mol%) glass-ceramic sample as a separator. The cathode composite of the test cell was a mixture of LiNi_1/3Mn_1/3Co_1/3O₂ (NMC) active materials, the solid electrolyte, and acetylene black. The test cell exhibited high electrochemical stability and the electrochemical capacity based on NMC active materials was 145 mAhg⁻¹.

硫化物固体电解质 xLiCl-(25-x)LiBr-75Li3PS4 是通过两步玻璃陶瓷法合成的。第一步，通过高能球磨法获得无定形前驱体；第二步，将获得的前驱体加热到 165 至 180 °C，以获得结晶样品。在 0 < x < 12.5 成分范围内，热处理样品中析出了类 LGPS 结晶相。玻璃陶瓷样品在 25 °C 时显示出 3 × 10-3 至 4 × 10-3 S cm-1 的高离子导电率。使用 7.5LiCl-17.5LiBr-75Li3PS4 (mol%) 玻璃陶瓷样品作为隔膜，在全固态试验电池上进行了充放电试验。试验电池的阴极复合材料是镍钴锰锂（NMC）活性材料、固体电解质和乙炔黑的混合物。试验电池具有很高的电化学稳定性，基于 NMC 活性材料的电化学容量为 145 mAhg-1。

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引用次数: 0