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学者姓名：尉海军
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Abstract ：
Manganese-based cathode materials have garnered extensive interest because of their high capacity, superior energy density, and tunable crystal structures. Despite their cost-effectiveness, challenges like Mn dissolution and gas evolution originating from the irreversible structural degradation pose risks to stability and prolonged electrochemical behaviors, ultimately constraining their practical applications and market prospects. While the material characteristics and redox mechanisms of Mn-based cathodes are extensively investigated, a systematic iterative approach to material design that balances performance and application demands remains both necessary and urgent. Recent strategies for enhancing cathode performances emphasize the innovative introduction and customization of composite structures in Mn-based cathode materials to address the challenges above. This review aims to provide a comprehensive understanding of composite-structure construction methodologies and offers practical guidelines for effectively designing high-stability Mn-based composite-structure cathode materials. This encompasses the classifications of composite scales, the discussions for the extent of composite-structure construction inside and outside of the cathode grains, and an exploration of the development potential of these materials, especially for grid-scale applications.
Keyword ：
Mn-based cathodes Mn-based cathodes lithium manganese iron phosphate lithium manganese iron phosphate composite structures composite structures grid-scale applications grid-scale applications lithium-ion battery lithium-ion battery Mn-based lithium-rich layered oxides Mn-based lithium-rich layered oxides
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| GB/T 7714 | Liu, Shiqi , Wang, Yulong , Du, Haozhe et al. Manganese-Based Composite-Structure Cathode Materials for Sustainable Batteries [J]. | ADVANCED ENERGY MATERIALS , 2024 . |
| MLA | Liu, Shiqi et al. "Manganese-Based Composite-Structure Cathode Materials for Sustainable Batteries" . | ADVANCED ENERGY MATERIALS (2024) . |
| APA | Liu, Shiqi , Wang, Yulong , Du, Haozhe , Li, Yuming , Wang, Yinzhong , Wang, Guoqing et al. Manganese-Based Composite-Structure Cathode Materials for Sustainable Batteries . | ADVANCED ENERGY MATERIALS , 2024 . |
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Abstract ：
Layered iron/manganese-based oxides are a class of promising cathode materials for sustainable batteries due to their high energy densities and earth abundance. However, the stabilization of cationic and anionic redox reactions in these cathodes during cycling at high voltage remain elusive. Here, an electrochemically/thermally stable P2-Na0.67Fe0.3Mn0.5Mg0.1Ti0.1O2 cathode material with zero critical elements is designed for sodium-ion batteries (NIBs) to realize a highly reversible capacity of approximate to 210 mAh g-1 at 20 mA g-1 and good cycling stability with a capacity retention of 74% after 300 cycles at 200 mA g-1, even when operated with a high charge cut-off voltage of 4.5 V versus sodium metal. Combining a suite of cutting-edge characterizations and computational modeling, it is shown that Mg/Ti co-doping leads to stabilized surface/bulk structure at high voltage and high temperature, and more importantly, enhances cationic/anionic redox reaction reversibility over extended cycles with the suppression of other undesired oxygen activities. This work fundamentally deepens the failure mechanism of Fe/Mn-based layered cathodes and highlights the importance of dopant engineering to achieve high-energy and earth-abundant cathode material for sustainable and long-lasting NIBs. A high-energy and earth-abundant Na0.67Fe0.3Mn0.5Mg0.1Ti0.1O2 cathode is developed, which shows significantly improved cycling stability at a high charge cut-off voltage of 4.5 V versus Na. Multiscale characterization reveals that the Mg/Ti co-doping improves the surface and bulk structural stability and enhances the cationic and anionic redox reaction reversibility during prolong cycling. image
Keyword ：
oxygen anionic redox oxygen anionic redox Fe/Mn-based layered oxides Fe/Mn-based layered oxides Na-ion batteries Na-ion batteries cycling stability cycling stability co-doping co-doping
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| GB/T 7714 | Zhang, Xu , Zuo, Wenhua , Liu, Shiqi et al. High-Energy Earth-Abundant Cathodes with Enhanced Cationic/Anionic Redox for Sustainable and Long-Lasting Na-Ion Batteries [J]. | ADVANCED MATERIALS , 2024 , 36 (33) . |
| MLA | Zhang, Xu et al. "High-Energy Earth-Abundant Cathodes with Enhanced Cationic/Anionic Redox for Sustainable and Long-Lasting Na-Ion Batteries" . | ADVANCED MATERIALS 36 . 33 (2024) . |
| APA | Zhang, Xu , Zuo, Wenhua , Liu, Shiqi , Zhao, Chen , Li, Qingtian , Gao, Yibo et al. High-Energy Earth-Abundant Cathodes with Enhanced Cationic/Anionic Redox for Sustainable and Long-Lasting Na-Ion Batteries . | ADVANCED MATERIALS , 2024 , 36 (33) . |
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Abstract ：
Manganese-based lithium-rich layered oxides (Mn-LLOs) are promising candidate cathode materials for lithium-ion batteries, however, the severe voltage decay during cycling is the most concern for their practical applications. Herein, an Mn-based composite nanostructure constructed Li2MnO3 (LMO@Li2MnO3) is developed via an ultrathin amorphous functional oxide LixMnOy coating at the grain surface. Due to the thin and universal LMO amorphous surface layer etched from the lithiation process by the high-concentration alkaline solution, the structural and interfacial stability of Li2MnO3 are enhanced apparently, showing the significantly improved voltage maintenance, cycle stability, and energy density. In particular, the LMO@Li2MnO3 cathode exhibits zero voltage decay over 200 cycles. Combining with ex situ spectroscopic and microscopic techniques, the Mn2+/4+ coexisted behavior of the amorphous LMO is revealed, which enables the stable electrochemistry of Li2MnO3. This work provides new possible routes for suppressing the voltage decay of Mn-LLOs by modifying with the composite functional unit construction.
Keyword ：
composite structure composite structure ultrathin amorphous coating ultrathin amorphous coating Mn-based oxide cathode Mn-based oxide cathode voltage decay voltage decay lithium-ion battery lithium-ion battery
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| GB/T 7714 | Liu, Shiqi , Wan, Jie , Wang, Boya et al. Zero Voltage-Degradation of Li2MnO3 with Ultrathin Amorphous Li―Mn―O Coating [J]. | SMALL , 2024 , 20 (36) . |
| MLA | Liu, Shiqi et al. "Zero Voltage-Degradation of Li2MnO3 with Ultrathin Amorphous Li―Mn―O Coating" . | SMALL 20 . 36 (2024) . |
| APA | Liu, Shiqi , Wan, Jie , Wang, Boya , Li, Chenghan , Wang, Yulong , Wang, Lin et al. Zero Voltage-Degradation of Li2MnO3 with Ultrathin Amorphous Li―Mn―O Coating . | SMALL , 2024 , 20 (36) . |
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Abstract ：
一种高离子电导率聚合物基复合固态电解质的制备及应用，属于锂离子电池电解质技术领域。本发明选用碳酸酯基聚合物、导电锂盐、多孔支撑材料、功能化硅烷偶联剂和无机离子导体材料复合制备有机无机复合固态电解质。聚碳酸酯基聚合物电解质具有高的离子电导率、宽的电化学窗口和高的离子迁移数；功能化的硅烷偶联剂能与聚合物及无机材料之间形成化学键和相互作用，起到聚合物和无机填料之间的桥梁作用，从而提高聚合物电解质的离子电导率和拓宽它的电化学窗口，改善固态电解质与正负极的界面接触，从而提高锂离子电池的充放电性能。适用于高电压正极材料的锂离子固态电池。
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| GB/T 7714 | 尉海军 , 吴玲巧 . 一种高离子电导率聚合物基复合固态电解质的制备及应用 : CN202310005768.7[P]. | 2023-01-01 . |
| MLA | 尉海军 et al. "一种高离子电导率聚合物基复合固态电解质的制备及应用" : CN202310005768.7. | 2023-01-01 . |
| APA | 尉海军 , 吴玲巧 . 一种高离子电导率聚合物基复合固态电解质的制备及应用 : CN202310005768.7. | 2023-01-01 . |
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Abstract ：
原位构筑超薄无定形纳米包覆层材料的方法，涉及锂离子电池用正极材料技术领域。本发明分别通过溶胶凝胶法、共沉淀法以及电沉积结合水热法对Li2MnO3正极材料进行包覆处理，将LixMnOy无定形纳米结构均匀，完整的包覆在Li2MnO3正极材料表面(LixMnOy@Li2MnO3)，其中LixMnOy为非晶无定形包覆层，厚度为0.1‑10nm；本发明通过在Li2MnO3正极材料表面包覆超薄无定形的LixMnOy，在保证该材料高放电比容量的同时并显著抑制了Li2MnO3的电压衰减，将其组装为扣式电池测试性能后发现包覆后的Li2MnO3材料在50圈充放电循环后的电压衰减为零。
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| GB/T 7714 | 尉海军 , 万界 , 刘世奇 . 原位构筑超薄无定形纳米包覆层材料的方法 : CN202310318577.6[P]. | 2023-03-28 . |
| MLA | 尉海军 et al. "原位构筑超薄无定形纳米包覆层材料的方法" : CN202310318577.6. | 2023-03-28 . |
| APA | 尉海军 , 万界 , 刘世奇 . 原位构筑超薄无定形纳米包覆层材料的方法 : CN202310318577.6. | 2023-03-28 . |
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Abstract ：
一种氧化还原介质降低氧化锂复合正极材料电压极化方法，可有效改善基于Li2O复合正极材料的封闭型锂离子电池，属于电化学储能技术领域。本申请中，氧化还原介质为LiI等碘化物，能够有效降低Li2O充放电过程中的电压极化，解决因Li2O自身导电性差带来的电压滞后问题。本申请提供的技术具有便捷、快速、低成本、易放大等优势，具有较好的应用前景，有助于进一步推动氧化锂复合正极材料的实际应用，对于高能锂离子电池的发展具有良好的促进作用。
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| GB/T 7714 | 张旭 , 吴海鹏 , 尉海军 . 一种氧化还原介质降低氧化锂复合正极材料电压极化方法 : CN202310165991.8[P]. | 2023-02-21 . |
| MLA | 张旭 et al. "一种氧化还原介质降低氧化锂复合正极材料电压极化方法" : CN202310165991.8. | 2023-02-21 . |
| APA | 张旭 , 吴海鹏 , 尉海军 . 一种氧化还原介质降低氧化锂复合正极材料电压极化方法 : CN202310165991.8. | 2023-02-21 . |
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Abstract ：
一种富锂正极锂离子电池的低浓度电解液，属于电化学储能技术领域。所述电解液包含一种或两种锂盐、链状碳酸酯溶剂和环状碳酸酯溶剂的混合溶剂及低极性的共溶剂，其中锂盐的整体浓度为0.1～0.8mol/L，共溶剂为弱溶剂化的氟化溶剂。该电解液与传统电解液(1mol/L)相比具有更低的浓度，可以显著降低电解液的粘度、提高锂离子的扩散系数、改善电解液的浸润性。通过锂盐组分、溶剂及共溶剂构成的合理设计能够调控电解液的溶剂化结构、优化界面化学结构。本发明实现了富锂正极锂离子电池与低浓度电解液的良好兼容，获得了优异的循环稳定性和倍率性能。
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| GB/T 7714 | 尉海军 , 朱倩文 , 梁媛 . 一种富锂正极锂离子电池的低浓度电解液 : CN202310317590.X[P]. | 2023-03-28 . |
| MLA | 尉海军 et al. "一种富锂正极锂离子电池的低浓度电解液" : CN202310317590.X. | 2023-03-28 . |
| APA | 尉海军 , 朱倩文 , 梁媛 . 一种富锂正极锂离子电池的低浓度电解液 : CN202310317590.X. | 2023-03-28 . |
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Abstract ：
一种富锂正极锂离子电池的协同锂盐高温高压电解液，涉及电化学储能技术领域。电解液包括有机溶剂、协同锂盐和电解液添加剂，上述协同锂盐包含较高电导率的锂盐A和耐高温的锂盐B，锂盐的总浓度为0.5～1.2mol/L，电解液添加剂占电解液总质量的0～5％。本发明的电解液将不同优势的功能性锂盐混合形成协同效应，优化电解液的基本性质，能够在高温高压条件下减缓正极表面结构衰变，抑制电压降，有效提高富锂正极锂离子电池的高压高温循环稳定性，具有很好的研究价值和应用前景。
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| GB/T 7714 | 尉海军 , 朱倩文 , 梁媛 . 一种富锂正极锂离子电池的协同锂盐高温高压电解液 : CN202310318854.3[P]. | 2023-03-28 . |
| MLA | 尉海军 et al. "一种富锂正极锂离子电池的协同锂盐高温高压电解液" : CN202310318854.3. | 2023-03-28 . |
| APA | 尉海军 , 朱倩文 , 梁媛 . 一种富锂正极锂离子电池的协同锂盐高温高压电解液 : CN202310318854.3. | 2023-03-28 . |
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Abstract ：
超薄无定形纳米结构包覆的锂离子电池正极材料及其制备方法，涉及锂离子电池用正极材料技术领域。超薄无定形纳米结构包覆层为LixMnOy，被包覆的锂离子电池正极材料包括富锂锰基层状氧化物(Li1.2Mn0.57Ni0.17Co0.06O2，Li2MnO3)、三元正极材料(LiNi0.6Mn0.2Co0.2O2)、磷酸锰铁锂(LiMn0.6Fe0.4PO4)、锰酸锂(LiMn2O4)和钴酸锂(LiCoO2)；其中制备原料为常见的锂离子电池正极材料粉末，锂源和锰源；制备方法为将锂离子电池正极材料粉末加入到锂源和锰源溶液中进行水热反应。本发明提供的超薄无定形纳米结构包覆正极材料制得的扣式电池，相比于普通的正极材料，在循环稳定性方面有较大提升。
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| GB/T 7714 | 尉海军 , 万界 , 刘世奇 . 超薄无定形纳米结构包覆的锂离子电池正极材料及其制备方法 : CN202310318573.8[P]. | 2023-03-28 . |
| MLA | 尉海军 et al. "超薄无定形纳米结构包覆的锂离子电池正极材料及其制备方法" : CN202310318573.8. | 2023-03-28 . |
| APA | 尉海军 , 万界 , 刘世奇 . 超薄无定形纳米结构包覆的锂离子电池正极材料及其制备方法 : CN202310318573.8. | 2023-03-28 . |
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Abstract ：
The development of aluminum-ion batteries (AIBs) is significantly confined by the limited high-performance cathode materials. Herein, organopolysulfides are investigated as active cathode materials to fabricate AIBs. A liquid-phase phenyl tetrasulfide (PTS) can deliver a capacity above 600 mAh g -1 after activation, with the maintenance of 253 mAh g -1 after 100 cycles. Owing to the different S locations, PTS shows several voltage plateaus and an average voltage of similar to 0.7 V vs. Al3 + /Al with no decay upon cycling. More importantly, the liquid PTS can serve as a high-Coulombic-efficiency cathode ( similar to 99.88% +/- 0.57% after stabilization), enlighting the design of high-efficiency and low-resistance conversion-type cathode materials for AIBs. By experimental characterizations accompanied by theoretical calculations, it is found that PTS undergoes stepwise reaction procedures during discharge with final products of Al2S3 and AlCl2- coordinated phenyl sulfide, and partially reforms with elemental S and other organopolysulfides during charge. This study demonstrates new opportunities for the design of high-efficiency conversion-type cath-ode materials for advanced AIBs.(c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
Keyword ：
High coulombic efficiency High coulombic efficiency Cathode materials Cathode materials Aluminum-ion batteries Aluminum-ion batteries Organopolysulfides Organopolysulfides
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| GB/T 7714 | Chu, Weiqin , Zhang, Xu , Zhu, Fulong et al. Organopolysulfides as high-performance cathode materials for rechargeable aluminum-ion batteries [J]. | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2023 , 154 : 159-165 . |
| MLA | Chu, Weiqin et al. "Organopolysulfides as high-performance cathode materials for rechargeable aluminum-ion batteries" . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 154 (2023) : 159-165 . |
| APA | Chu, Weiqin , Zhang, Xu , Zhu, Fulong , Li, Shuaixia , Fu, Yongzhu , Yu, Haijun . Organopolysulfides as high-performance cathode materials for rechargeable aluminum-ion batteries . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2023 , 154 , 159-165 . |
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