JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Xianhong Zheng,Jinhao Tang,Binbin Ding,Wentao Cao,Zhi Liu,Xu Han,Hao Jia
Flexible yarn-shaped batteries are promising candidates for the wearable electronics owing to their good flexibility, tiny volume, compatibility with textiles. However, their practical applications are hindered by low capacity, active material mass loading, and energy density . Herein, we develop a coaxially wrapping strategy to fabricate an advanced yarn-shaped aqueous zinc-ion batteries (AZIBs) incorporating core-sheath carbon nanotube (CNT)/V 2 O 5 ·nH 2 O composite yarns as cathodes and zinc wire as anodes. The as-wrapped CNT intermediate layer not only enhances the surface's conductivity, but the nano-array porous layer can also accelerate the mixing of ion concentration between the electrode surface and the electrolyte fluid through the turbulence effect, thereby improving the interfacial ion/electron kinetics. As a result, the energy storage mechanism of CNT/V 2 O 5 ·nH 2 O yarn AZIBs transformed from capacitive-dominant to diffusion-controlled process, and the batteries demonstrate exceptional discharge capacity of 566.7 mAh g −1 at 0.1 A g −1 , surpassing the state-of-art yarn-based AZIBs and approaching the theoretical zinc storage capacity (589 mAh g −1 ). In addition, they exhibit a high energy density of 471 Wh kg −1 at 25.5 W kg −1 and excellent cycling performance. This work opens a new and efficient avenue for the structure design of high-performance electrode materials for flexible yarn-based batteries.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Bingbing Hu,Chuanlan Xu,Muhammad Kashif Aslam,Yuan Cen,Jiahong Hu,Yan Li,Yuping Liu,Chaozhong Guo,Danmei Yu,Changguo Chen
In this work, multilayer networks lanthanum-doped V 2 O 5 · n H 2 O@OAB (noted as La-VOH@OAB) binder-free thin film positive electrode has been first successfully synthesized via a simple and economical sol-gel and drop-coating methods. Benefiting from its unique architecture and the favorable synergetic contributions for rare earth metal ions of La 3+ and hydrophilic carbon of OAB, after the condition optimization, the 20%La-VOH@OAB-4 exhibits an excellent electrochemical performance with an ultrahigh specific capacitance of 612 F g −1 at a current density of 1 A g −1 , good rate capability (81.1%, the current density increases tenfold) and outstanding cycling stability (90.4% capacitance retention over 2000 cycles). In addition, flexible Fe 2 O 3 @rGO binder-free thin film negative electrode prepared with the similarly facile strategy demonstrates a high specific capacitance of 366 F g −1 due to Fe 2 O 3 nanoparticles tightly anchored on the rGO surface. The assembled 20%La-VOH@OAB-4//Fe 2 O 3 @rGO ASCs device within a voltage window of 1.7 V delivers a relatively high specific energy density of 56.3 Wh kg −1 at a power density of 849.9 W kg −1 with exceptional cycling stability (81.3% capacitance retention after 5000 cycles), moreover, two ASCs devices in parallel can light up a red LED for 3 min, demonstrating its potential in practical applications. This work provides a certain reference for the fabrication of environmentally friendly thin film electrodes for developing high efficient energy storage systems.
研究领域:
材料科学
·
能源存储技术
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Yuancheng Yao,Jinhuan Yao,Jiqiong Jiang,Xin Tang,Jianwen Yang,Yanwei Li
Developing bifunctional materials with concurrent electrochromic and electrochemical energy storage capabilities is crucial for advancing the construction of energy-saving smart windows, smart sensors, implanted displays, and electronic skins. Herein, a layered V 2 O 5 · n H 2 O thin film is fabricated through a facile electrodeposition method with V 2 O 5 sol as electrolyte, and its Mg 2+ storage and electrochromic performances are explored for the first time. This layered V 2 O 5 film exhibits outstanding Mg 2+ storage performance, delivering an areal specific capacity of 17 μAh cm −2 at 0.5 mA cm −2 , showing no capacity decay during 500 cycles, and exhibiting superior rate performance. It achieves an optical contrast (Δ T ) of 64.63% at 769 nm wavelength (between orange-red and dark green) and a rapid switching speed. Notably, the color transition exhibits a distinct potential dependence and high optical distinguishability: it reversibly switches between green, orange, and red hues at discrete potential points during the electrochemical cycling process. The structure/performance relationship of the film is analyzed via in situ Raman, ex situ XRD, XPS, and DFT calculations. This study provides clues for developing Mg 2+ -intercalation-based electrochromic energy storage bifunctional materials.
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
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 COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Qingqing He,Huayu Wang,Jie Bai,Yanxin Liao,Suna Wang,Lingyun Chen
Aqueous zinc ion batteries (AZIBs) and aqueous magnesium ion batteries (AMIBs) offer powerful alternatives for large-scale energy storage because of their high safety and low cost. Consequently, the design of high-performance cathode materials is essential. In this paper, we present a simple strategy that combines oxygen defect (O d ) engineering with a 2D-on-2D homogeneous nanopape-like bilayer V 2 O 5 nH 2 O xerogel (BL-HVO d NPS). This strategy employs O d to improve Zn 2+ /Mg 2+ insertion/extraction kinetics and reduce irreversible processes for high-performance AZIBs/AMIBs. And interlayer water molecules serve as an effective spacer to stabilize the expanded interlayer gap in BL-HVO d NPS, thereby providing extended diffusion channels for Zn 2+ /Mg 2+ during insertion/extraction. The interlayer water molecules help shield the electrostatic interaction between Zn 2+ /Mg 2+ and BL-HVO d NPS lattice, which improves diffusion kinetics during repeated. In addition, electrochemical characterization results indicate that the BL-HVO d NPS can effectively the surface adsorption and internal diffusion of Zn 2+ /Mg 2+ . More importantly, the successfully prepared unique 2D-on-2D homogenous nanopaper structure enhances electrolyte/electrode contact and reduces the migration/diffusion path of electrons/Zn 2+ and Mg 2+ , thus greatly improving rate performance. As a result, the BL-HVO d NPS as AZIBs/AMIBs electrodes offer better reversible capacity of 361.8 and 162.8 mA h g −1 (at 0.2 A g −1 ), while displaying impressively long cycle lifes. This method provides a way to prepare advanced xerogel cathode materials for AZIBs and AMIBs.
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
Nanomaterials
·
2022
·Vol. 12
·期 15
·2530
·
IF 5.719
Xiaoping Tan,Gaoli Guo,Kaidi Wang,Huang Zhang
Aqueous zinc-ion batteries offer the greatest promise as an alternative technology for low-cost and high-safety energy storage. However, the development of high-performance cathode materials and their compatibility with aqueous electrolytes are major obstacles to their practical applications. Herein, we report the synthesis of orthorhombic V2O5·nH2O nanorods as cathodes for aqueous zinc batteries. As a result, the electrode delivers a reversible capacity as high as 320 mAh g−1at 1.0 A g−1and long-term cycling stability in a wide window of 0.2 to 1.8 V using a mild ZnSO4aqueous electrolyte. The superior performance can be attributed to the improved stability of materials, inhibited electrolyte decomposition and facilitated charge transfer kinetics of such materials for aqueous zinc storage. Furthermore, a full cell using microsized Zn powder as an anode within capacity-balancing design exhibits high capacity and stable cycling performance, proving the feasibility of these materials for practical application.Keywords:zinc batteries;V2O5·nH2O nanorods;cathode materials;Zn anode;aqueous batteries
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2023
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IF 17.6
Yuexin Liu,Yuning Sun,Jing Zhang,Xuxia Hao,Mingcheng Zhang,Ping Wei,Xiaoli Zhao,Kefeng Cai
The lack of suitable cathode materials greatly limits the potential applications of rechargeable aqueous zinc ion batteries (ZIBs), despite their great promise in terms of high safety, high energy density , and low cost. One promising cathode material is VOOH, which possesses high specific capacity and fast Zn 2+ transport channels after a phase transition to V 2 O 5 ·nH 2 O during electrochemical cycling. However, its susceptibility to structural disintegration and aggregation during charging and discharging leads to severe capacity decay. To address this issue, we construct a composite consisting of VOOH particles and VS x microrods by a one-step hydrothermal method using a vanadium-based metal-organic framework (MIL-88B(V)) as a sacrificial template. The VOOH particles undergo electrochemical activation and transform into V 2 O 5 ·nH 2 O nanoarrays that vertically grow on the VS x microrods. This unique nano-composite effectively maintains the morphology of nanoarrays in electrochemical cycling, resulting in a significant enhancement of rate performance and long-term cycling stability. Moreover, the VS x itself provides considerable capacity and its high conductivity improves the rate performance of the composite. Consequently, the VOOH/VS x nanocomposite exhibits a superior capacity of 364 mA h g −1 at 0.2 A g −1 after activation. Notably, it maintains remarkable capacity retention of 99.6% after 700 cycles, even at a high current density of 10 A g −1 . Based on these findings, we believe that the VOOH/VS x composite holds great promise as a cathode material for aqueous ZIBs.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 10
·5479-5487
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IF 14.511
Dong Chen,Haoliang Chen,Cheng-Feng Du,Lin Liu,Hongbo Geng,Hong Yu,Xianhong Rui
Although hydrated vanadate compounds have received extensive attention in aqueous batteries due to their high specific capacity, they are still impeded by the poor cycling resulting from host structure degradation and metal dendrite formation. Herein, we prepare multi-ion co-pre-intercalated hydrated vanadate microflowers (MxVO) with a robust crystal structure from vanadium slag waste, presenting highly reversible and ultrafast Zn2+ storage. Furthermore, using diethyl ether as the electrolyte additive, the cycling durability of zinc metal can be improved and the cells can work well at −20 °C. Impressively, the MxVO cathode realizes an unparalleled rate capability (203 mA h g−1 at 100 A g−1) and excellent cycling stability (317 mA h g−1 after 4000 cycles at 20 A g−1). Even when tested at −20 °C, it demonstrates a satisfactory zinc storage capability (e.g., the coin-type cell shows a discharge capacity of 120 mA h g−1 at 50 A g−1, and the pouch cell delivers ∼200 mA h g−1 at 1 A g−1). Hence, this work has exploited a new and efficient avenue for the exploration and utilization of solid waste toward high-performance aqueous batteries and other electrochemical applications.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）