ELECTROCHIMICA ACTA
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2024
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IF 5.5
Rongzhang Yang,Hao Liang,Meiran Chen,Fengqi Lu
Layer SnS 2 has been garnered significant attention for next-generation lithium-ion batteries (LIBs), due to its abundant resources and high theoretical capacity. However, the low initial Coulombic efficiency, large volume expansion and structural degradation have significantly hindered its application in LIBs. Herein, the layer Sn 0.7 (MoFeCoNiV) 0.3 S 2 nanosheets (HE3-SnS 2 ) grown on the conductive substrate carbon cloth (CC) is synthesized by one-step hydrothermal method. Multiple elements doping strategy not only increases the conformational entropy which will improve the structural stability of during cycling, but also enlarges the interlayer spacing which benefits for lithium-ion transfer. As a result, the additive-free integrated CC@HE3-SnS 2 electrode achieves a high reversible specific capacity of 1204.9 mAh g −1 with a high initial Coulombic efficiency of 94.7 % at 1C, and maintains 1011.4 mAh g −1 after 100 cycles. Specifically, the CC@HE3-SnS 2 anode exhibits excellent rate capability of 670.8 mAh g −1 at 10C. Moreover, the full cell based on CC@HE3-SnS 2 anode and commercial LiCoO 2 cathode displays a stable capacity retention of 862.7 mAh g −1 after 100 cycles at 1C. The entropy-stabilized SnS 2 -based anode with high initial Coulombic efficiency and rate capability has a competitive candidate for LIBs.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiaoqing Zhang,Jianwei Xiong,Fengzhen Chang,Zhuijun Xu,Zheng Wang,Philip Hall,Ya-Jun Cheng,Yonggao Xia
The Ni-rich cathode holds great promise for high energy density lithium-ion batteries because of its high capacity and operating voltage. However, crucial problems such as cation disorder, structural degradation, side reactions, and microcracks become serious with increasing nickel content. Herein, a novel and facile sol/antisolvent coating modification of Ni-rich layered oxide LiNi0.85Co0.1Mn0.05O2 (NCM) is developed where we use ethanol to disperse the nanosized LiBO2 to form the sol and adopt tetrahydrofuran (THF) as antisolvent to prepare the cluster of nanoparticles to be coated on the surface of NCM. The coating thickness can be tuned through the THF addition amount. The LiBO2 nanorod deposition is formed as well over the crack of the NCM cathode, likely acting as a patch to repair the original defect of the intrinsic crack. The uniform LiBO2 nanospherical particle coating together with LiBO2 nanorod wrapping provides a double protection against electrolytes. Compared with the raw material, LiBO2-coated LiNi0.85Co0.1Mn0.05O2 (LiBO2-coated NCM) exhibits a high initial Coulombic efficiency of 90.3% at 0.2 C between 2.8 and 4.3 V vs Li+/Li, a superior rate capability, enhanced fast charge property at 3 C, and restricted microcrack formation. This simple in-site modification and repairing technology guarantees a good mechanical integrity of the polycrystalline Ni-rich cathode.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 16
·7206-7220
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IF 9.931
Tao Liang,Renzong Hu,Houpo Zhang,Hanyin Zhang,Hui Wang,Yunpeng Ouyang,Jun Liu,Lichun Yang,Min Zhu
A new ternary SnO2–Co–C composite is produced using a facile and scalable ball milling method, which has a microstructure that includes refined SnO2–Co hybrids embedded in graphite. The Co additives dramatically inhibit Sn coarsening in the lithiated SnO2, which enables highly reversible conversion reactions in the SnO2-based ternary composite during cycling. The electrodes exhibit high ICEs with an average of 80.8% and a reversible capacity of 780 mA h g−1 at 0.2 A g−1 after 400 cycles when the composite was manufactured via small planetary ball milling, and they achieve 875 mA h g−1 after 250 cycles when the material is prepared on a large-scale with a roller mill. Even at a high rate of 2 A g−1, the composite has a long lifetime and delivers 610 mA h g−1 after 1000 cycles. Furthermore, a stable capacity of 410 mA h g−1 can be also retained in a full cell combined with a LiFePO4 cathode and SnO2–Co–C anode when cycling within 2.3–3.4 V at 0.2C. The new ternary SnO2–Co–C composite demonstrates excellent comprehensive electrochemical performances, and it is a promising candidate anode material for use in practical applications.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yong Wu,Honglei Liu,Deli Li,Ranlin Dong,Mengfan Bu,Bei Liu,Xiaoming Fan,Weixin Zhang
Silicon (Si) is emerging as a highly promising anode material candidate for high energy-density lithium-ion batteries (LIBs). However, its significant volume expansion during cell cycling poses a substantial challenge. Herein, fluorinated carbon derived from a fluorine-rich polymer is employed as a functional layer to engineer the solid electrolyte interface (SEI) of Si based anode material, featuring LiF-rich components in the SEI film. The strong initial Coulombic efficiency (ICE)-semi-ionic F/C linear correlation in Si@C/F nanoparticles demonstrates the essential function of semi-ionic fluorine in high-efficiency Si anodes. Semi-ionic fluorine promotes preferential LiF nucleation during SEI formation, which simultaneously suppresses lithium-consuming side reactions to enhance ICE and stabilizes the electrode interface. The homogeneous LiF distribution creates low-barrier Li + diffusion channels, markedly boosting electrode kinetics for enhanced high-rate capability. As a result, the Si@C/F composite exhibits outstanding electrochemical performance, with an ICE value as high as 88.8 %. The Si@C/F composite also demonstrates excellent long-cycling stability and high-rate capability, maintaining a reversible capacity of 971.8 mAh g −1 even under 1 A g −1 for 500 cycles. This work reveals the regulation of C F bonds in the carbon layer to construct robust SEI layer in the Si/C composites, offering a strategy for advanced Si-based anode materials with both high ICE and stable cycling performance.
研究领域:
储能
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材料科学
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电化学
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纳米技术
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电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
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IF 4.598
Xiuxia Lu,Haohao Liu,Xiaoxiao Shi,Jianyin Zhang
At present, it is still challenging to fabricate anode materials for lithium-ion batteries with excellent electrochemical performances by simple process on a large scale. In this paper, by using a conventional solid state reaction technique along with a mechanical ball milling method, an unique Li 3 Fe(MoO 4 ) 3 @C composite was synthesized. The amorphous carbon introduction is helpful in mitigating the volume expansion and enhancing the structural stability and electrochemical performance of the composite materials. After 100 cycles at 200 mA g −1 , the Li 3 Fe(MoO 4 ) 3 @C composite electrode maintained a high reversible capacity of 739 mAh/g with an initial Coulombic efficiency of 82 %. In addition, the rate performances of the composite electrode is also remarkable, and the reversible capacity is up to 740 mAh/g at 1600 mA g −1 . This work can provide inspiration for the preparation of molybdenum based transition metal oxide composites with high electrochemical performances for other alkali metal secondary batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 22
·8734-8741
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IF 8.262
Jingwen Zhou,Jian Qin,Naiqin Zhao,Chunsheng Shi,En-Zuo Liu,Fang He,Jiajun Li,Chunnian He
Constructing a 3D porous architecture from 2D MoS2 nano-building blocks has been considered as a promising approach to prevent restacking and thus achieve superior properties in energy conversion and storage, catalysis, sensors, and so on. In this work, a novel salt (NaCl) template-assisted solid-phase synthesis strategy is developed to fabricate a new type of MoS2 with a robust 3D honeycomb-like structure without the necessity to use a solution reaction. As a demonstration of structural advantages, the 3D honeycomb-structured MoS2 with a highly crystalline architecture and intimate interfacial bonding between adjacent MoS2 walls is utilized as a lithium-ion battery anode, exhibiting an unprecedented initial coulombic efficiency (∼93.5%), large specific capacity, high rate capability and excellent cycle stability.
研究领域:
材料科学
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能量存储
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纳米技术
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
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IF 8.456
Xiaoming Lou,Renjie Li,Xiangzhen Zhu,Lijie Luo,Yongjun Chen,Chunfu Lin,Hongliang Li,X. S. Zhao
This paper describes the syntheses and electrochemical properties of a new niobate compound, aluminum niobate (AlNb11O29), for Li+ storage. AlNb11O29-microsized particles and nanowires were synthesized based on the solid-state reaction and solvothermal methods, respectively. In situ X-ray diffraction results confirmed the intercalating mechanism of Li+ in AlNb11O29 and revealed its high structural stability against cycling. The AlNb11O29 nanowires with a novel bamboo-like morphology afforded a large interfacial area and short charge transport pathways, thus leading to the observed excellent electrochemical properties, including high reversible Li+-storage capacity (266 mA h g–1), safe operating potential (around 1.68 V), and high initial Coulombic efficiency (93.3%) at 0.1 C. At a very high rate (10 C), the AlNb11O29 nanowires still exhibited a capacity as high as 192 mA h g–1, indicating their good rate capability. In addition, at 10 C, 96.3% capacity was retained over 500 cycles, indicating superior cycling stability. A full cell fabricated with AlNb11O29 nanowires as the anode and LiNi0.5Mn1.5O4 microparticles as the cathode delivered a high energy density of 390 W h kg–1 at 0.1 C. This work suggests that the AlNb11O29 nanowires hold a great promise for the development of high-performance lithium-ion batteries for large-scale energy-storage applications.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）