Journal of Electroanalytical Chemistry最新文献

Influence of interlayer design on the corrosion mechanism of high strength 6061MOD-based four-layer cladding aluminum alloy in OY solution 层间设计对高强度6061mod基四层熔覆铝合金在OY溶液中腐蚀机理的影响

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-02-04 DOI: 10.1016/j.jelechem.2026.119888

Qi Cao , Na Zhao , Tianyi Yang , Chen Yang , Long Cheng , Hui Liu , Dejing Zhou

To address the need for lightweight and long-lasting liquid cooling plates in new energy vehicles, this study introduces a novel high strength four-layer cladding structure, involving two alloys. The core material is high-strength 6061MOD aluminum alloy, with 4045 as the brazing layer. Interlayers of 3003MOD and 1050MOD are also included, respectively. The corrosion behavior in an acidified chloride-containing environment within the liquid cooling plate was examined via cyclic corrosion testing in OY solution. Combined with electrochemical tests such as OCP, and microscopic characterization techniques including OM, SEM, EBSD, EPMA, XPS and TEM, the influence mechanism of the interlayer alloy on the material's corrosion resistance was systematically analyzed. The results show that the alloy with a 1050MOD interlayer exhibits superior corrosion resistance (corrosion depth of 550 μm vs. 1016 μm). Its coarse elongated grain structure, lower proportion of high-angle grain boundaries, low dislocation density, strong cubic texture {100}⟨001⟩, and stable corrosion product film effectively inhibit pitting initiation and intergranular propagation, forming a typical layered corrosion morphology, significantly delaying the expansion of corrosion to the core material and reducing the corrosion rate. This research provides crucial theoretical and experimental support for using high-strength, corrosion-resistant multi -layer cladding aluminum alloys in liquid cooling plates.

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引用次数: 0

High-performance flexible supercapacitors based on nitrogen-doped carbon nanotubes derived from ZIFs at low temperature 基于氮掺杂碳纳米管的低温柔性超级电容器

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-02-03 DOI: 10.1016/j.jelechem.2026.119912

Jiaxin Yang, Tian Lv, Keyi Dong, Weiyang Tang, Quanhu Sun, Zefeng Yan, Yan Tan, Yu Wang, Tao Chen

Nitrogen-doped carbon nanotubes (NCNTs) have attracted considerable interest as promising electrode materials for supercapacitors (SCs) due to their exceptional electrical conductivity, robust mechanical properties, and readily tunable surface chemistry, but often suffer from their limited specific surface area and a scarcity of electrochemically active sites. In this work, we present a novel approach to synthesize NCNTs via pyrolysis of zeolitic imidazolate frameworks (ZIFs) at a low temperature of 500 °C for high-performance flexible SCs. The synthesized NCNTs exhibit a hierarchical porous architecture with high nitrogen content (12.22%), which contributes to enhanced pseudocapacitive performance. Using the NCNTs as the electrode and a polyvinyl alcohol /LiCl gel as electrolyte, the developed SC exhibits a high specific capacitance of 411 mF cm⁻² at a current density of 0.5 mA cm⁻² and excellent cyclic stability up to 90% of its original capacitance after 25,000 charge/discharge cycles. Furthermore, the SCs can well maintain their performance under various bending angles and repeated bending cycles, suggesting excellent flexibility.

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引用次数: 0

Study on highly stable CuxBiy@Ti alloy electrode and its application performance in anode-free zinc ion batteries 高稳定CuxBiy@Ti合金电极及其在无阳极锌离子电池中的应用性能研究

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-01-31 DOI: 10.1016/j.jelechem.2026.119878

Han Shen , Lijun Chen , Yue Jing , Xiaorong Meng , Xiaopeng Ma , Lu Li , Yuhang Wang

Designing zinc-affinity copper substrate materials is an effective strategy for creating dendrite-free and zinc-deposition-free anodes for anode-free zinc-ion batteries (AF-AZIB). To further enhance the stability of anode-free copper substrates, a Cu_xBi_y@Ti alloy electrode with a three-dimensional network structure was constructed on titanium foil via constant-current electrodeposition. The effects of electrolyte composition on the morphology, chemical composition, structure, and electrochemical performance of the Cu_xBi_y@Ti electrode were investigated, and the preparation conditions for the Cu_xBi_y@Ti anode were optimized. The results reveal that the Cu_xBi_y@Ti surface comprises a Cu-Bi alloy matrix together with metal oxides; an excess of Bi³⁺ suppresses the preferential deposition of Cu²⁺, and a 1:1 Cu²⁺/Bi³⁺ ratio in the electrolyte yields the highest alloying degree (CuBi@Ti). In half-cell tests, CuBi@Ti exhibits rapid Zn²⁺ adsorption/stripping kinetics, excellent hydrogen-evolution suppression and corrosion resistance, enabling stable operation for nearly 2000 h at 1 mA·cm⁻². A full CuBi@Ti//MnO₂ cell demonstrates robust cycling stability at 2 A·g⁻¹. This work offers a new avenue for designing high-performance electrode materials for anode-free aqueous zinc-ion batteries.

设计亲锌铜衬底材料是制备无阳极锌离子电池（AF-AZIB）中无枝晶和无锌沉积阳极的有效策略。为了进一步提高无阳极铜衬底的稳定性，采用恒流电沉积的方法在钛箔上构建了三维网状结构的CuxBiy@Ti合金电极。研究了电解质组成对CuxBiy@Ti电极形貌、化学组成、结构和电化学性能的影响，并优化了CuxBiy@Ti阳极的制备条件。结果表明：CuxBiy@Ti表面由Cu-Bi合金基体和金属氧化物组成；过量的Bi3+会抑制Cu2+的优先沉积，当电解质中Cu2+/Bi3+的比例为1:1时，合金化程度最高（CuBi@Ti）。在半电池测试中，CuBi@Ti表现出快速的Zn2+吸附/剥离动力学，出色的析氢抑制和耐腐蚀性，能够在1 mA·cm−2下稳定运行近2000小时。一个完整的CuBi@Ti//MnO2电池在2 A·g−1下具有强大的循环稳定性。本研究为设计高性能无阳极锌离子水电池电极材料提供了一条新的途径。

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引用次数: 0

“Armored hollow spheres”: In situ Polypyrrole encapsulation enables robust Mn₂O₃ cathodes for high-performance aqueous zinc-ion batteries “装甲空心球体”：原位聚吡咯封装为高性能水性锌离子电池提供了坚固的Mn₂O₃阴极

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-01-31 DOI: 10.1016/j.jelechem.2026.119909

Xin Li , Yuting Zhao , Linwen Li , Tiantian Zhu , Yiwei Tian , Hailun Lu , Jiacheng Wen , Fuxiang Wei , Yanwei Sui , Bin Xiao

Aqueous zinc-ion batteries (AZIBs) are considered promising alternatives to lithium-ion batteries due to their inherent safety, low cost, and environmental friendliness. However, the practical application of manganese-based cathodes such as Mn₂O₃ is hindered by structural instability and poor conductivity. Herein, a hollow core–shell Mn₂O₃@polypyrrole (PPy) composite is rationally designed and fabricated through a combined hydrothermal and in situ oxidative polymerization approach. The conformal PPy coating enhances electronic conductivity, suppresses Mn dissolution, and cooperates with the hollow architecture to accommodate volume variation during cycling. As a result, the Mn₂O₃@PPy cathode delivers a high reversible capacity of 227 mAh g⁻¹ at 0.2 A g⁻¹, superior rate capability, and remarkable cycling stability with a capacity retention of 43 mAh g⁻¹ after 1000 cycles at 1 A g⁻¹. Kinetic analysis reveals a mixed capacitive-diffusion controlled charge storage mechanism, while ex-situ XRD confirms the highly reversible co-(de)intercalation of Zn²⁺ and H⁺. This work offers an effective structural-engineering strategy to develop durable manganese-based cathodes for advanced aqueous energy storage systems.

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引用次数: 0

High-performance anode material carbon-coated WS2 for lithium and sodium ion battery 锂钠离子电池用高性能碳包覆负极材料WS2

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-01-29 DOI: 10.1016/j.jelechem.2026.119891

Miao Jiang , Yi-Han Gui , Ying-Jin Zhao , Luan Fang , Song-Lin Tian , San-Long Wang , Ji Li , Li-Min Chang

With the rapid advancement of society and economic development, the demand for advanced energy storage solutions has increased significantly. Secondary batteries have emerged as a focal point in renewable energy research due to their environmental sustainability and portability. In particular, lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) have been widely adopted owing to their high energy density. This study successfully synthesized tungsten disulfide (WS₂) nanosheets using a two-step solid-phase method and prepared a series of carbon-coated WS₂ composites (C-WS₂-n) through dopamine modification and high-temperature carbonization. The carbon coating method effectively enhances the cycling stability of WS₂. Electrochemical tests demonstrated that the C-WS₂-n composites, used as anode materials for lithium/sodium-ion batteries, significantly improved conductivity and structural stability, effectively mitigating volume changes during charge and discharge cycles. Among them, the C-WS₂-0.5 material still maintains a discharge specific capacity of 338.9 mAh g⁻¹ after 500 cycles in LIBs and 68.8 mAh g⁻¹ after 500 cycles in SIBs, it exhibited the most outstanding rate performance and cycling stability in both LIBs and SIBs and shown particularly high practical potential in LIBs. This research provides an effective modification strategy for the application of transition metal sulfides in secondary batteries.

随着社会经济的快速发展，对先进储能解决方案的需求显著增加。二次电池因其环境可持续性和便携性而成为可再生能源研究的热点。特别是锂离子电池（LIBs）和钠离子电池（SIBs）由于其高能量密度而被广泛采用。本研究采用两步固相法成功合成了二硫化钨（WS2）纳米片，并通过多巴胺修饰和高温碳化制备了一系列碳包覆WS2复合材料（C-WS2-n）。碳包覆法有效地提高了WS2的循环稳定性。电化学测试表明，C-WS2-n复合材料作为锂/钠离子电池的负极材料，显著提高了电池的导电性和结构稳定性，有效地缓解了充放电循环过程中的体积变化。其中，C-WS2-0.5材料在lib中500次循环后仍保持338.9 mAh g−1的放电比容量，在sib中500次循环后仍保持68.8 mAh g−1的放电比容量，在lib和sib中都表现出最突出的倍率性能和循环稳定性，在lib中显示出特别高的实用潜力。本研究为过渡金属硫化物在二次电池中的应用提供了一种有效的改性策略。

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引用次数: 0

Synergistic K+ intercalation and PVP modification: boosting V2O5 cathode performance for aqueous zinc-ion batteries 协同K+插层和PVP改性：提高水性锌离子电池V2O5阴极性能

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-01-29 DOI: 10.1016/j.jelechem.2026.119892

Zihang Zhou , Zhi Chen , Suwen Lai , Hongkun Lu , Juntong Huang , Huiyong Yang , Xiaofeng Chen , Qi Sun , Hui Zhou , Wentao Qian

With their inherent safety, cost-effective, and environmental sustainability, aqueous zinc-ion batteries (AZIBs) represent a highly promising technology for future energy storage. Vanadium-based oxides hold great application potential owing to their abundant tunnel structures and high electrode potentials. However, the primary limitations of vanadium-based oxides lie in their poor electrical conductivity and poor cycling stability. Therefore, advancing AZIBs requires cathode materials that can achieve high-capacity Zn²⁺ storage while ensuring long-term structural stability. This study successfully prepared PKVOH with stacked nanosheets by K⁺ intercalation and PVP coating modification of V₂O₅ via hydrothermal reaction. The supporting role of K⁺ mitigates rapid collapse of the vanadium-based material, while PVP modification engineers a favorable morphology with high specific surface area, thereby directly creating additional electrochemically active sites. Outstanding cycling stability is achieved with the PKVOH electrode, achieving a specific capacity as high as 356 mAh g⁻¹ at 0.1 A g⁻¹. Remarkably, A capacity of 188 mAh g⁻¹ is retained after 4000 cycles at 5 A g⁻¹. Complementarily, the Zn²⁺ storage mechanism was probed using ex-situ XRD analysis, providing new insights into enhancing the ion-doping performance of vanadium-based materials.

由于其固有的安全性、成本效益和环境可持续性，水性锌离子电池（azib）代表了一种非常有前途的未来储能技术。钒基氧化物具有丰富的隧道结构和较高的电极电位，具有很大的应用潜力。然而，钒基氧化物的主要局限性在于其导电性差和循环稳定性差。因此，推进azib需要能够在保证长期结构稳定性的同时实现高容量Zn2+存储的正极材料。本研究通过K+插层和水热反应对V2O5进行PVP涂层改性，成功制备了堆叠纳米片的PKVOH。K+的支持作用减轻了钒基材料的快速坍塌，而PVP改性工程具有高比表面积的有利形貌，从而直接产生额外的电化学活性位点。PKVOH电极实现了出色的循环稳定性，在0.1 a g−1时实现高达356 mAh g−1的比容量。值得注意的是，在5a g−1下循环4000次后，容量仍保持在188 mAh g−1。此外，利用非原位XRD分析探讨了Zn2+的储存机理，为提高钒基材料的离子掺杂性能提供了新的见解。

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引用次数: 0

Hierarchical nanoarchitectonics of porous carbon from rice straw via K2CO3-activation for high-energy symmetric supercapacitors 利用k2co3活化稻草多孔碳制备高能对称超级电容器的分级纳米结构

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-01-28 DOI: 10.1016/j.jelechem.2026.119887

Zhe Chen , Haibo Huang , Mingxi Li , Yibo Zhao , Ming Li , Ting Zeng

Hierarchically porous carbon is synthesized from rice straw biomass using controlled K₂CO₃ activation for advanced supercapacitor applications. The optimal material, activated rice straw-based biomass carbon (ARBBC)-8, exhibits an expanded interlayer spacing of 3.98 Å, an enhanced defect density (I_d/I_g) of 0.98, and a micro-mesoporous architecture with a 993 m² g⁻¹ specific surface area. X-ray photoelectron spectroscopy (XPS) analysis confirms the presence of electrochemically active N/O functionalities, including pyridinic nitrogen (398.3 eV) and carbonyl groups (532.6 eV), which enable dual energy storage mechanisms. In a three-electrode configuration (6 M KOH), ARBBC-8 delivers a specific capacitance of 392 F g⁻¹ at 2 A g⁻¹ with 50% rate retention at 20 A g⁻¹. The symmetric supercapacitor achieves an energy density of 22.09 Wh kg⁻¹ at 1470 W kg⁻¹, surpassing most aqueous biomass-derived carbon systems. The capacitance retention of 97.6% and Coulombic efficiency of 99.7% after 10,000 cycles demonstrate remarkable cycling stability. This study utilizes synergistic pore-structure engineering and heteroatom functionality optimization to establish rice straw as a sustainable precursor for high-performance energy storage materials.

利用可控的K2CO3活化，从稻草生物质中合成了分层多孔碳，用于高级超级电容器的应用。最优材料为活性稻草基生物质碳(ARBBC)-8，其层间距扩大为3.98 Å，缺陷密度（Id/Ig）增强为0.98，微介孔结构具有993 m2 g−1的比表面积。x射线光电子能谱（XPS）分析证实了电化学活性N/O官能团的存在，包括吡啶氮（398.3 eV）和羰基（532.6 eV），它们能够实现双重能量存储机制。在三电极配置（6 M KOH）中，arbc -8在2 a g−1时提供392 F g−1的特定电容，在20 a g−1时保持50%的速率。对称超级电容器在1470 W kg - 1时的能量密度为22.09 Wh kg - 1，超过了大多数水性生物质衍生碳系统。1万次循环后电容保持率为97.6%，库仑效率为99.7%，具有良好的循环稳定性。本研究利用协同孔隙结构工程和杂原子功能优化来建立水稻秸秆作为高性能储能材料的可持续前体。

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引用次数: 0

Weakly solvating electrolyte enables robust LiF-rich interphase to stabilize SnO2-based anode toward Li storage at low temperature 弱溶剂化电解质使富lif界面在低温下稳定sno2基阳极的锂存储

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-01-27 DOI: 10.1016/j.jelechem.2026.119877

Yongbo Cui , Yazhou Zhang , Yu Qin , Cheng Wang , Xuan Liu , Yingmin Liu , Wenxia Chen , Meng Liu , Fei Li , Wei Wei

Tin dioxide (SnO₂) is a promising anode material for lithium-ion batteries (LIBs). However, SnO₂ suffers from severe agglomeration and significant volume expansion during cycling. Moreover, the sluggish kinetics at low temperatures further exacerbate the performance fade. Herein, we designed a weakly solvating localized high-concentration salt electrolyte (2 M LiFSI in THF: TTE, denoted as LTT-2). The designed electrolyte exhibited high ionic conductivity and facilitated the formation of a robust LiF-rich solid electrolyte interphase (SEI). This SEI architecture significantly enhanced the structural stability and electrochemical performance of the SnO₂/graphene composite anode (SnO₂/GA). Specifically, in LTT-2 electrolyte, the SnO₂/GA maintained a capacity of 605.7 mAh g⁻¹ after 100 cycles at a current density of 0.5C (1C = 782 mA g⁻¹). At −30 °C, it retained a discharge specific capacity of 411.3 mAh g⁻¹ after 100 cycles (0.1C), with a capacity retention rate as high as 81.1%. This work demonstrates a viable strategy for stabilizing SnO₂-based anodes for Li storage under low temperature conditions.

二氧化锡（SnO2）是一种很有前途的锂离子电池负极材料。然而，SnO2在循环过程中会发生严重的结块和明显的体积膨胀。此外，低温下缓慢的动力学进一步加剧了性能衰退。本文设计了一种弱溶剂化局部高浓度盐电解质（2 M LiFSI in THF: TTE，记为LTT-2）。所设计的电解质具有高离子电导率，有利于形成坚固的富锂固体电解质界面（SEI）。这种SEI结构显著提高了SnO2/石墨烯复合阳极（SnO2/GA）的结构稳定性和电化学性能。具体而言，在LTT-2电解质中，在0.5C （1C = 782 mA g - 1）电流密度下，SnO2/GA在100次循环后保持605.7 mAh g - 1的容量。在−30°C下，经过100次循环（0.1C）后，其放电比容量保持在411.3 mAh g−1，容量保持率高达81.1%。这项工作证明了在低温条件下稳定sno2基锂存储阳极的可行策略。

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引用次数: 0

A porphyrazine-based sensor for nitrite detection 一种基于卟啉嗪的亚硝酸盐检测传感器

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-01-27 DOI: 10.1016/j.jelechem.2026.119881

Leonardo M.A. Ribeiro , Douglas P.M. Saraiva , Hiago N. Silva , Marcos M. Toyama , Sergio H. Toma , Bruno L. Hennemann , Koiti Araki , Henrique E. Toma , Mauro Bertotti

Nitrite plays a critical role in environmental, food, and biomedical systems; however, its fast and reliable quantification remains challenging due to the limitations of conventional analytical methods. Specifically, traditional methods are often time-consuming, require complex instrumentation, and are unsuitable for field applications. Herein, we report the development of a highly sensitive electrochemical sensor based on a novel supramolecular porphyrazine complex, Tetraruthenated Tetra(pyridyl)Porphyrazine Cobalt (CoTPyPzTRu). This complex was successfully synthesized, characterized by MALDI/TOF/MS, and immobilized onto a platinum microfiber (25 μm diameter) via dip-coating. Morphological analysis by SEM/EDS confirmed the formation of a homogeneous CoTPyPzTRu layer covering the microfiber surface. Electrochemically, the CoTPyPzTRu-modified electrode demonstrated a significantly enhanced electrocatalytic response toward nitrite oxidation, with a steady increase in current compared to the bare electrode. The sensor's practical utility was validated in some matrices, including tap water, algae medium, and artificial saliva, using the standard addition method. The amperometric results showed an excellent correlation (R² = 0.998) with the gold-standard Griess method. Furthermore, recovery tests in spiked samples confirmed the sensor's outstanding accuracy and reliability, showing recovery values as 55 ± 2 μmol L⁻¹ (spiked: 50 μmol L⁻¹) for tap water, 102 ± 7 μmol L⁻¹ (spiked: 100 μmol L⁻¹) for algae medium, and 150 ± 10 μmol L⁻¹ (spiked: 150 μmol L⁻¹) for artificial saliva. This work demonstrated the CoTPyPzTRu-modified microfiber as a robust, sensitive, and practical platform for nitrite quantification, offering a promising alternative for rapid analysis in diverse environmental and biological applications.

亚硝酸盐在环境、食品和生物医学系统中起着关键作用；然而，由于传统分析方法的局限性，其快速可靠的定量仍然具有挑战性。具体来说，传统方法通常耗时，需要复杂的仪器，并且不适合现场应用。在此，我们报告了一种基于新型超分子卟啉配合物，四aruthenated Tetra(pyridyl) porphyrazine Cobalt （CoTPyPzTRu）的高灵敏度电化学传感器的开发。通过MALDI/TOF/MS对该配合物进行了表征，并通过浸渍涂层将其固定在直径为25 μm的铂微纤维上。SEM/EDS形貌分析证实了在微纤维表面形成了均匀的CoTPyPzTRu层。电化学上，cotpypzru修饰电极对亚硝酸盐氧化的电催化反应显著增强，与裸电极相比，电流稳定增加。采用标准的添加方法，在自来水、藻类培养基和人工唾液等基质中验证了该传感器的实用性。安培结果与金标准Griess法具有良好的相关性（R2 = 0.998）。此外，对加标样品的回收率测试证实了该传感器具有良好的准确性和可靠性，自来水的回收率为55±2 μmol L−1（加标为50 μmol L−1），藻类培养基的回收率为102±7 μmol L−1（加标为100 μmol L−1），人工唾液的回收率为150±10 μmol L−1（加标为150 μmol L−1）。这项工作证明了cotpypztruu修饰的微纤维是一种可靠、敏感和实用的亚硝酸盐定量平台，为各种环境和生物应用的快速分析提供了一种有前途的选择。

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引用次数: 0

Synthesis and electrochemical investigation of cobalt-free high-nickel quaternary LiNi0.9Fe0.03Mn0.04Mg0.03O2 cathodes 无钴高镍季系lini0.9 fe0.03 mn0.04 mg0.030 o2阴极的合成及电化学研究

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-01-27 DOI: 10.1016/j.jelechem.2026.119879

Jiatai Wang , Yuanyuan Li , Chao Fan , Jiting Li , Xi Wen , Xiaohong Ma , Jian Li

Cobalt-free high‑nickel layered oxides are promising cathode materials for lithium-ion batteries (LIBs) due to their high capacity and cost-effectiveness. Nevertheless, high‑nickel materials suffer from intrinsic challenges including severe Li/Ni cation mixing, harmful H2-H3 phase transitions, and structural degradation, which result in capacity fading and poor rate performance. In this work, the quaternary LiNi_0.9Fe_0.03Mn_0.04Mg_0.03O₂ (NFMM) cathodes were synthesized via homogeneous co-precipitation followed by high-temperature solid-state method. X-ray diffraction analysis confirmed well-ordered layered structures with I(0 0 3)/I(1 0 4) ratios of 1.28, 1.73, and 1.46 for samples calcined at 700 °C, 725 °C, and 750 °C, respectively. All samples delivered high initial discharge capacities of 191.53, 193.27, and 186.30 mAh g⁻¹ at 0.1C, maintaining 86.58%, 91.97%, and 89.21% capacity retention after 100 cycles at 0.2C. The materials showed good rate capability with discharge capacities of 91.46, 97.15, and 85.32 mAh g⁻¹ at 5.0C. These results demonstrate that the NFMM quaternary composition exhibits favorable electrochemical performance, contributing to the development of cobalt-free cathode materials for lithium-ion batteries.

无钴高镍层状氧化物因其高容量和高性价比而成为锂离子电池极具前景的正极材料。然而，高镍材料面临着固有的挑战，包括严重的Li/Ni阳离子混合，有害的H2-H3相变和结构降解，导致容量衰退和速率性能差。本文采用高温固相法，采用均匀共沉淀法合成了第四系lini0.9 fe0.03 mn0.04 mg0.030 o2 （NFMM）阴极。x射线衍射分析证实，在700°C、725°C和750°C煅烧的样品，层状结构有序，I(0 0 3)/I（1 0 4）比值分别为1.28、1.73和1.46。在0.1C下，所有样品的初始放电容量分别为191.53、193.27和186.30 mAh g - 1，在0.2C下循环100次后，容量保持率分别为86.58%、91.97%和89.21%。在5.0℃下，材料的放电容量分别为91.46、97.15和85.32 mAh g−1。这些结果表明，NFMM四元化合物具有良好的电化学性能，有助于锂离子电池无钴正极材料的发展。

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引用次数: 0