JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Qiang Li,Yanyi Wang,Ming Yang,Jianhui Zhu,Peixin Zhang,Zonggang Quan,Shichang Sun,Dingtao Ma
Aqueous zinc-ion battery (AZIB) attracts a great attention and becomes a hotspot due to its low cost and high safety in recent years. However, the sluggish transport kinetics of cathode materials is a significant drawback limiting their application. Herein, this work reports a novel VSe 2 /V 2 O 5 · n H 2 O/reduced graphene oxide ternary composite (VSe 2 /V 2 O 5 · n H 2 O/rGO) constructed with an anti-aggregation and porous 3D framework. The as-prepared ternary composite acting as cathode for AZIBs could provide a high capacity of 327.4 mA h g −1 at the current density of 0.2 A g −1 . More importantly, it also possesses excellent rate capability and cyclic stability, which deliver a specific capacity of 254 mA h g −1 at a high current density of 5 A g −1 . In addition, the structural evolution and transport kinetics of VSe 2 /V 2 O 5 · n H 2 O/rGO upon cycling are investigated. Benefiting from the high reversibility of phase evolution and the reduced graphene oxide (rGO) composition, the prepared VSe 2 /V 2 O 5 · n H 2 O/rGO can maintain a robust structure during cycling, improve the transport kinetics and thus displaying an outstanding electrochemical performance. This study offers a new route for designing cathode materials and promoting the development of high-performance AZIBs.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Hongwei Zhang,Deping Xiong,Yandong Xie,Hongli Zhang,Zuyong Feng,Kunhua Wen,Zhaoying Li,Miao He
Sodium-ion batteries (SIBs) arouse researchers’ interest gradually because of the scarcity of lithium sources. VSe 2 is one of the transition metal dichalcogenides (TMDs) equipped with a huge interlayer distance to accommodate more Na + ions, but the problems such as agglomeration, volume deformation, dissolution loss and so on hinder its further development. Therefore, a VSe 2 /B 4 C@HCG composite was fabricated by the simple high-energy ball milling method. The B 4 C and VSe 2 nanoparticles are mixed and restrict each other, then anchor on the graphene, which alleviates agglomeration and volume deformation of VSe 2 during cycling processes effectively, and improves the overall environmental stability and conductivity. As a result, the VSe 2 /B 4 C@HCG composite delivers a reversible capacity of 407.5 mAh g −1 with the coulombic efficiency of 98.5% after 450 cycles, superior rate performance of 524.2, 476.3, 413.7, 353.7, and 295.3 mAh g −1 at the different current density of 100, 200, 500, 1000, and 2000 mA g −1 , and ultrastable long-term cycling property of 251.6 mAh g −1 at the current density of 1 A g −1 after 1000 cycles, indicating the VSe 2 /B 4 C@HCG composite shows utilization potentiality to be used as an excellent anode material for SIBs.
研究领域:
材料科学
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储能
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电化学
·
纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2020
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IF 8.247
Yuanke Wu,Wei Zhong,Wenwen Tang,Longcheng Zhang,Hao Chen,Qiulin Li,Maowen Xu,Shu-juan Bao
Sodium ion batteries (SIBs) based on quasi-solid-state electrolyte are a new type of energy device that exhibit high energy and security. However, the large-volume expansion and sluggish kinetics of the anode materials during the ion insertion/extraction remains a particular challenge for solid-state SIBs. In this work, flexible binder-free films composed of ultrafine VSe 2 particles wrapped in N-doped carbon nanofibers (VSe 2 /NCNFs) are prepared as the anode of a quasi-solid-state SIBs. The ultra-small VSe 2 nanoparticles allow for rapid Na ion migration, and the highly graphitized carbon fibers provides a fast electronic transmission channel and stable host to relive the volume expansion of VSe 2 during cycles. Foremost, the elastic coordination between VSe 2 /NCNFs and gel electrolyte can further buffer the overall volume expansion of VSe 2 /NCNFs. Moreover, the flexible freestanding VSe 2 /NCNFs anode combine with gel polymer in the sodium ion half-cells deliver a high reversible capacity of 420.8 mA h g −1 at a current density of 0.05 A g −1 , excellent rate capability of 278.1 mA h g −1 at 5 A g −1 , and 206.8 mA h g −1 at 5 A g −1 after 10,000 cycles. The sodium storage mechanism of VSe 2 /NCNFs electrodes during the charge/discharge process is also explored by ex situ XRD in the first time.
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
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2026
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IF 9.8
Ying Gao,Libo Wang,Ji'a Yang,Qixun Xia,Qianku Hu,Yukai Chang,Aiguo Zhou
MXenes are a promising cathode materials for aqueous zinc ion batteries (AZIBs) due to their layered structure, metallic conductivity, and hydrophilicity. Vanadium diselenide (VSe 2 ) is a typical transition metal dichalcogenide with good metallic properties and high conductivity. In this work, V 2 CT x was successfully synthesized by etching V 2 AlC with a hydrochloric acid solution of sodium fluoride, and surface selenization of V 2 CT x was accomplished using a high-temperature solid-state reaction. During the reaction process, some vanadium atoms on the surface of V 2 CT x were selenized and transformed into small VSe 2 nanosheets, while oxygen-containing groups form V 2 O 3 with vanadium atoms, and resulting in a V 2 CT x /VSe 2 /V 2 O 3 heterostructure material. The components of the nanohybrid were tuned by changing the mass ratio of selenium to V 2 CT x and the optimized VSe 2 –14 composite simultaneously achieved high specific capacitance (224.8 mAh/g after 200 cycles at 0.5 A g −1 ), excellent rate performance (126.2 mAh/g at 10 A g −1 ), and satisfactory cycle stability (141.3 mAh/g after 1300 cycles at 5 A g −1 ). This study provides a reference for the application of MXene-based materials in aqueous zinc ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Jing Li,Chen Yuan,Huiting Xu,Huibin Liu,Junjie Qi,Zhaohua Jiang,Sai Dong,Rongyu Guo,Zhijie Cui,Wenchao Peng,Jiapeng Liu
Conversion-type aqueous copper-selenium (Cu-Se) batteries have gained considerable attention due to their high theoretical capacity, safety and environmental friendliness. However, the multi-electron intermediate conversion reaction of selenium cathode generally possesses sluggish kinetics, which seriously impedes the further development of Cu-Se batteries. Herein, the porous V 2 C@VSe 2 heterostructure (P-V 2 C@VSe 2 ) with built-in electric field (BIEF) were successfully synthesized by the sacrificial template method and in situ selenization strategy, which were used as the selenium host materials for aqueous Cu-Se batteries to effectively enhance the selenium conversion reaction kinetics. The porous structure of P-V 2 C@VSe 2 not only provides faster access for the transport of polyselenide intermediates during electrochemical reactions, but also exposes more catalytic active sites, which in turn improves the catalytic activity of the material. In addition, the built-in electric field generates at the interface of the P-V 2 C@VSe 2 heterostructure facilitates the acceleration of charge transfer and thus improves the kinetics of the redox reaction of selenium. Benefiting from the synergistic effect of the porous structure and the built-in electric field, the Se/P-V 2 C@VSe 2 cathode possessed a discharge specific capacity of 1182.2 mAh g −1 at a current density of 1 A g −1 , which was much higher than those of Se/P-V 2 C (796.6 mAh g −1 ) and Se (597.0 mAh g −1 ) cathodes. In addition, it also maintained a specific capacity of 1054.6 mAh g −1 after 6000 cycles at 10 A g −1 , demonstrating excellent cycling stability. Meanwhile, a series of characterizations and density functional theory calculations were performed to systematically explore the conversion mechanism of aqueous Cu-Se batteries. This work provides promising insights into the construction of high-performance MXene-based catalytic host materials for aqueous Cu-Se batteries.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）