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学者姓名：尉海军
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摘要 ：
A high-voltage aluminium-sulfur (Al-S) battery is developed by employing the reversible electrochemical oxidation of S, favoring a high discharge voltage of around 1.8 V (vs Al3+/Al). The reversible multiple-electron transformation between positive- and negative-valence S compounds is further realized for activating a high-capacity Al-S battery. The formation of sulfur chlorides as charge products of S, including S2Cl2(l) as the dominant one, has been clearly identified. Benefiting from a functional polymer membrane infiltrated with AlCl3/acetamide electrolyte, which can suppress unwanted electrolyte reactions, restrict the shuttling of sulfur chlorides across the separator, and stabilize the Al anode against degradation, the Al-S battery can deliver largely enhanced performance, with a capacity of 861 mAh g(-1), capacity retentions of 92.1%/79.0% within 50/200 cycles, and durability of 490 cycles. The new electrochemistry scenarios shed light on the development of S-based secondary batteries with higher energy densities for future.
关键词 ：
multiple-electron transformations multiple-electron transformations high-voltages high-voltages shuttle of sulfur chlorides shuttle of sulfur chlorides aluminium-sulfur batteries aluminium-sulfur batteries functional polymer membranes functional polymer membranes
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| GB/T 7714 | Zhang, Dian , Chu, Weiqin , Wang, Dan-Yang et al. High-Voltage Aluminium-Sulfur Batteries with Functional Polymer Membrane [J]. | ADVANCED FUNCTIONAL MATERIALS , 2022 , 32 (39) . |
| MLA | Zhang, Dian et al. "High-Voltage Aluminium-Sulfur Batteries with Functional Polymer Membrane" . | ADVANCED FUNCTIONAL MATERIALS 32 . 39 (2022) . |
| APA | Zhang, Dian , Chu, Weiqin , Wang, Dan-Yang , Li, Shuaixia , Zhao, Shu , Zhang, Xu et al. High-Voltage Aluminium-Sulfur Batteries with Functional Polymer Membrane . | ADVANCED FUNCTIONAL MATERIALS , 2022 , 32 (39) . |
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摘要 ：
Surface/interfacial engineering is critical for preventing particle degradation of Li-rich layered oxides (LLOs), particularly facet degradation, thereby optimizing their electrochemical performance. Thus, the current study details the investigative analysis of the surface structure of an LLO, followed by its surface engineering. The surface structure was analyzed using scanning transmission electron microscopy (STEM) and soft X-ray absorption spectroscopy (sXAS), and the electrochemical performance was evaluated. The results indicate that an integrated spinel/rock salt (ISR) surface structure formed on the surface in situ. More precisely, the spinel phase originated from the C2/m surface, whereas the rock salt phase originated from the R3m surface, which significantly increased the cycle stability and suppressed voltage decay. After 2000 cycles, the surface-modified LLO cathode retained an extremely high capacity of 69.6% and a low discharge medium voltage with a decay rate of 0.44 mV cycle(-1). Additionally, the structural and morphological changes observed after prolonged cycling confirmed the stability of the surface layer. The outstanding performance was attributed to the ultra-stable ISR surface layer, the presence of multiple ion conductivities (LiPO(3 )and Li2SO4), and the substantial prevention of electrochemical facet degradation. The findings, therefore, highly suggest that the ISR surface concept and the method for surface modification is highly likely to aid in the rapid commercialization of LLOs for battery applications.
关键词 ：
Low voltage decay Low voltage decay Long-term life Long-term life Spinel/rock-salt Spinel/rock-salt Facet protection Facet protection C2/m surface C2/m surface
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| GB/T 7714 | Li, Guohua , Ren, Zhimin , Li, ALin et al. Highly stable surface and structural origin for lithium-rich layered oxide cathode materials [J]. | NANO ENERGY , 2022 , 98 . |
| MLA | Li, Guohua et al. "Highly stable surface and structural origin for lithium-rich layered oxide cathode materials" . | NANO ENERGY 98 (2022) . |
| APA | Li, Guohua , Ren, Zhimin , Li, ALin , Yu, Ruizhi , Quan, Wei , Wang, Changhong et al. Highly stable surface and structural origin for lithium-rich layered oxide cathode materials . | NANO ENERGY , 2022 , 98 . |
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摘要 ：
Garnet-type solid-state electrolytes Li7La3Zr2O12 (LLZO) for high-energy-density batteries have attracted extensive attention. However, stabilizing the high-conductive cubic phase and improving its ionic conductivity remain challenges of current research. Here, a Ca-W dual-substitution strategy has been designed, and the effect of doping on cubic phase formation and Li+ mobility has been investigated thoroughly. The results indicated that the partial substitution of Ca2+ at the La3+ site and W6+ at the Zr4+ site can effectively stabilize the cubic phase while reducing the endothermic enthalpy during the synthesis. Moreover, Ca-W dual substitution regulates the local Li+ framework by increasing Li+ occupancy at the 96h site, which can significantly lower the Li+ migration barrier and thus improve the ionic conductivity by two orders of magnitude. This work addresses the challenge of stabilizing a highly conductive cubic phase with low-energy consumption and represents a major breakthrough in understanding how to improve the ionic conductivity by regulating local structures.
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| GB/T 7714 | Sun, Furong , Yang, Yubo , Zhao, Shu et al. Local Li+ Framework Regulation of a Garnet-Type Solid-State Electrolyte [J]. | ACS ENERGY LETTERS , 2022 , 7 (8) : 2835-2844 . |
| MLA | Sun, Furong et al. "Local Li+ Framework Regulation of a Garnet-Type Solid-State Electrolyte" . | ACS ENERGY LETTERS 7 . 8 (2022) : 2835-2844 . |
| APA | Sun, Furong , Yang, Yubo , Zhao, Shu , Wang, Yongtao , Tang, Mingxue , Huang, Qingzhen et al. Local Li+ Framework Regulation of a Garnet-Type Solid-State Electrolyte . | ACS ENERGY LETTERS , 2022 , 7 (8) , 2835-2844 . |
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摘要 ：
Germanium (Ge)-based materials can serve as promising anode candidates for high-energy lithium ion batteries (LIBs). However, the rapid capacity decay caused by huge volume expansion severely retards their application. Herein, we report a facile and controllable synthesis of Ge nanowire anode materials through molten salt electrolysis. The optimal Ge nanowires can deliver a capacity of 1058.9 mAh g(-1) at 300 mA g(-1) and a capacity above 602.5 mAh g(-1) at 3000 mA g(-1) for 900 cycles. By in situ transmission electron microscopy and in situ X-ray diffraction, the multiple-step phase transformation and good structural reversibility of the Ge nanowires during charge/discharge are elucidated. When coupled with a lithium-rich Li(1.2)Mn(0.56)7Ni(0.167)Co(0.06)7O(2) cathode in a full battery, the Ge nanowire anode leads to a relatively stable capacity with a retention of 84.5% over 100 cycles. This research highlights the significance of molten-salt electrolysis for the synthesis of alloy-type anode materials toward high-energy LIBs.
关键词 ：
Ge nanowires Ge nanowires Li-ion battery Li-ion battery anode materials anode materials in situ TEM in situ TEM molten-salt electrolysis molten-salt electrolysis
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| GB/T 7714 | Liu, Huan , Wu, Tianhao , Zhang, Liqiang et al. Germanium Nanowires via Molten-Salt Electrolysis for Lithium Battery Anode [J]. | ACS NANO , 2022 , 16 (9) : 14402-14411 . |
| MLA | Liu, Huan et al. "Germanium Nanowires via Molten-Salt Electrolysis for Lithium Battery Anode" . | ACS NANO 16 . 9 (2022) : 14402-14411 . |
| APA | Liu, Huan , Wu, Tianhao , Zhang, Liqiang , Wang, Xin , Li, Haifeng , Liu, Shiqi et al. Germanium Nanowires via Molten-Salt Electrolysis for Lithium Battery Anode . | ACS NANO , 2022 , 16 (9) , 14402-14411 . |
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摘要 ：
Poly(vinyl ethylene carbonate) (PVEC) electrolyte is one of the preferable choices for solid-state lithium metal batteries (SSLMBs). However, the poor anti-oxidation ability still hinders its practical application for high-energy SSLMBs with high-voltage cathodes. Herein, the strategy of molecular structure adjustment is proposed for improving the properties of PVEC, which exhibits the widened electrochemical stability window (4.8 V vs. Li+/Li) and high ionic conductivity (1.1 x 10(-3) S cm(-1) at 25 degrees C). The compatibilities of cathode/electrolyte and anode/electrolyte interfaces are also enhanced respectively by eliminating the weak bonding of polymer mo-lecular structure and forming LixSn alloy during the ring-opening polymerization. The solid-state batteries with LiCoO2 cathode exhibit the high capacity when charged to 4.5 V at 25 degrees C. Therefore, this work not only dem-onstrates the effective method to enhance the interfacial compatibility between electrolyte and electrode, but also affords an emerging design strategy for polymer electrolyte by breaking the unstable weak bonding for the application requirements of SSLMBs.
关键词 ：
Molecular structure Molecular structure Solid-state lithium metal batteries Solid-state lithium metal batteries Poly(vinyl ethylene carbonate) Poly(vinyl ethylene carbonate) Anti-oxidation Anti-oxidation Ring-opening Ring-opening
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| GB/T 7714 | Lin, Zhiyuan , Guo, Xianwei , Zhang, Rui et al. Molecular structure adjustment enhanced anti-oxidation ability of polymer electrolyte for solid-state lithium metal battery [J]. | NANO ENERGY , 2022 , 98 . |
| MLA | Lin, Zhiyuan et al. "Molecular structure adjustment enhanced anti-oxidation ability of polymer electrolyte for solid-state lithium metal battery" . | NANO ENERGY 98 (2022) . |
| APA | Lin, Zhiyuan , Guo, Xianwei , Zhang, Rui , Tang, Mingxue , Ding, Peipei , Zhang, Zihe et al. Molecular structure adjustment enhanced anti-oxidation ability of polymer electrolyte for solid-state lithium metal battery . | NANO ENERGY , 2022 , 98 . |
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摘要 ：
Titanium-based anode materials have achieved much progress with the wide studies in lithium-ion batteries. However, these known materials usually possess high discharge voltage platforms and limited energy densities. Herein, a titanium-based oxide of Na2TiGeO5 with layered structure, two-dimensional lamellar frame and exposed highly active (001) facet, exhibiting good electrochemical performance in terms of high capacity (410 mAh g(-1) with a current density of 50 mA g(-1)), excellent rate capability and cycling stability with no obvious capacity attenuation after 4000 cycles, is reported. The appropriate discharge voltage plateau at around 0.2 V endows the Na2TiGeO5 anode material high security compared with graphite and high energy density compared with spinel Li4Ti5O12. Combining the electrochemical tests and the density functional theory calculations, the Li+ storage mechanism of Na2TiGeO5 is elucidated and the conversion reaction process is revealed. More importantly, this study provides a way to develop low-voltage and high-capacity titanium-based anode materials for efficient energy storage.
关键词 ：
2TiGeO 2TiGeO (5) sheets (5) sheets Na Na titanium-based anode materials titanium-based anode materials reaction mechanisms reaction mechanisms amorphization amorphization lithium-ion batteries lithium-ion batteries
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| GB/T 7714 | Liu, Zhiwei , He, Di , Wang, Boya et al. A Low-Voltage Layered Na2TiGeO5 Anode for Lithium-Ion Battery [J]. | SMALL , 2022 , 18 (14) . |
| MLA | Liu, Zhiwei et al. "A Low-Voltage Layered Na2TiGeO5 Anode for Lithium-Ion Battery" . | SMALL 18 . 14 (2022) . |
| APA | Liu, Zhiwei , He, Di , Wang, Boya , Wu, Tianhao , Zhao, Shu , Li, Xunlu et al. A Low-Voltage Layered Na2TiGeO5 Anode for Lithium-Ion Battery . | SMALL , 2022 , 18 (14) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Na2TiSiO5 (NTSO) is a low-cost Li-ion battery anode with great application potential, such as the tetragonal NTSO (T-NTSO) with a high capacity and a low voltage. In addition to the tetragonal structure, NTSO has two other polymorphs. However, the basic understanding of the structure, ion insertion and transport mechanisms of these new materials is still lacking. Herein, we present a combined experimental and computational investigation of the tetragonal and orthorhombic NTSO to reveal the intrinsic mechanism leading to the superior electrochemical performance of T-NTSO. We determined that the insertion site with a flexible Ti4+/Ti3+ redox pair is critical for Li+ insertion stability. The large number of such flexible sites in the T-NTSO results in a higher capacity and higher ionic conductivity than those of orthorhombic polymorph. The understanding of intrinsic properties will accelerate the development and utilization of titanosilicates as the next generation low-voltage anode of Li-ion battery.
关键词 ：
Lithium-ion batteries Lithium-ion batteries Flexible redox pair Flexible redox pair Anode materials Anode materials Titanosilicates Titanosilicates First-principles calculations First-principles calculations
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| GB/T 7714 | Zhao, Shu , Wu, Tian-Hao , He, Di et al. Theoretical research into low-voltage Na-2 TiSiO5 anode for lithium-ion battery [J]. | RARE METALS , 2022 , 41 (10) : 3412-3420 . |
| MLA | Zhao, Shu et al. "Theoretical research into low-voltage Na-2 TiSiO5 anode for lithium-ion battery" . | RARE METALS 41 . 10 (2022) : 3412-3420 . |
| APA | Zhao, Shu , Wu, Tian-Hao , He, Di , Zhang, Zi-He , Wang, Bo-Ya , Wang, Li-Hang et al. Theoretical research into low-voltage Na-2 TiSiO5 anode for lithium-ion battery . | RARE METALS , 2022 , 41 (10) , 3412-3420 . |
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摘要 ：
As one of the high-energy cathode materials of lithium-ion batteries (LIBs), lithium-rich-layered oxide with "single-crystal" characteristic (SC-LLO) can effectively restrain side reactions and cracks due to the reduced inner boundaries and enhanced mechanical stabilities. However, there are still high challenges for SC-LLO with diverse performance requirements, especially on their cycle stability improvement. Herein, a novel concentration gradient "single-crystal" LLO (GSC-LLO), with gradually decreasing Mn and increasing Ni contents from center to surface, is designed and prepared by combining co-precipitation and molten-salt sintering methods, yielding a capacity retention of 97.6% and an energy density retention of 95.8% within 100 cycles at 0.1 C. The enhanced performance is mostly attributed to the gradient-induced stabilized structure, free of cracks and less spinel-like structure formation after long-term cycling. Furthermore, the gradient design is also beneficial to the safety of LLOs as suggested by the improved thermal stability and reduced gas release. This study provides an effective strategy to prepare high-energy, high-stability, and high-safety LLOs for advanced LIBs.
关键词 ：
lithium-ion batteries lithium-ion batteries single-crystals single-crystals cycle stability cycle stability concentration gradient concentration gradient lithium-rich layered oxides lithium-rich layered oxides
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| GB/T 7714 | Wu, Tianhao , Zhang, Xu , Wang, Yinzhong et al. Gradient "Single-Crystal" Li-Rich Cathode Materials for High-Stable Lithium-Ion Batteries [J]. | ADVANCED FUNCTIONAL MATERIALS , 2022 , 33 (4) . |
| MLA | Wu, Tianhao et al. "Gradient "Single-Crystal" Li-Rich Cathode Materials for High-Stable Lithium-Ion Batteries" . | ADVANCED FUNCTIONAL MATERIALS 33 . 4 (2022) . |
| APA | Wu, Tianhao , Zhang, Xu , Wang, Yinzhong , Zhang, Nian , Li, Haifeng , Guan, Yong et al. Gradient "Single-Crystal" Li-Rich Cathode Materials for High-Stable Lithium-Ion Batteries . | ADVANCED FUNCTIONAL MATERIALS , 2022 , 33 (4) . |
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摘要 ：
电动汽车续航里程的提升主要依赖于锂离子电池的能量密度,其中发展高容量的正极材料成为关键。富锂锰基层状氧化物(LLOs)和高镍三元层状氧化物(NCM,Ni≥80%)等高容量正极材料成为了研究热点,其前体的开发对正极材料电化学性能的发挥有重要的影响。本文从工业化的角度对共沉淀法制备LLOs和NCM正极材料前体的反应过程和影响因素进行了介绍,分析了球形团聚体、单晶和浓度梯度等正极材料的结构和性能,并详细阐述了正极材料中晶面取向调控、掺杂及表界面处理等改性策略的原理及优缺点。文章指出,综合来看单晶材料表现出较好的循环稳定性和热稳定性,但倍率性能有待进一步提升。浓度梯度正极材料不仅保持了高容量特性,还兼...
关键词 ：
共沉淀 共沉淀 前体 前体 锂离子电池 锂离子电池 高容量正极材料 高容量正极材料
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| GB/T 7714 | 王策 , 王国庆 , 王二锐 et al. 锂离子电池正极材料合成及改性 [J]. | 化工进展 , 2021 , 40 (09) : 4998-5011 . |
| MLA | 王策 et al. "锂离子电池正极材料合成及改性" . | 化工进展 40 . 09 (2021) : 4998-5011 . |
| APA | 王策 , 王国庆 , 王二锐 , 吴天昊 , 尉海军 . 锂离子电池正极材料合成及改性 . | 化工进展 , 2021 , 40 (09) , 4998-5011 . |
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摘要 ：
锂离子电池高电压正极材料高浓度电解液，属于电化学储能技术领域。该电解液含有锂盐、溶剂及添加剂，锂盐浓度范围在1.0‑5.0mol/L，优选1.2‑5.0mol/L。本发明的电解液可应用在锂离子电池、锂金属电池等领域，可以显著提升电解液的电化学稳定窗口，抑制过渡金属的溶出，组装成的锂离子电池首圈库伦效率高、容量高、循环稳定性好。
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| GB/T 7714 | 尉海军 , 韩志杰 , 梁媛 et al. 锂离子电池高电压正极材料高浓度电解液 : CN202110058937.4[P]. | 2021-01-17 . |
| MLA | 尉海军 et al. "锂离子电池高电压正极材料高浓度电解液" : CN202110058937.4. | 2021-01-17 . |
| APA | 尉海军 , 韩志杰 , 梁媛 , 赵景腾 , 郭现伟 , 张旭 . 锂离子电池高电压正极材料高浓度电解液 : CN202110058937.4. | 2021-01-17 . |
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