CHEMISTRY-A EUROPEAN JOURNAL
·
2024
·Vol. 30
·期 25
·e202400088
·
IF 3.9
Xin Li,Xin Lai,Qingquan Kong,Xuguang An,Jing Zhan,Xiaolei Li,Xiaonan Liu,Weitang Yao
P2-type layered manganese-based oxides have attracted considerable interest as economical, cathode materials with high energy density for sodium-ion batteries (SIBs). Despite their potential, these materials still face challenges related to sluggish kinetics and structural instability. In this study, a composite cathode material, Na 0.67 Ni 0.23 Mn 0.67 V 0.1 O 2 @Na 3 V 2 O 2 (PO 4 ) 2 F was developed by surface-coating P2-type Na 0.67 Ni 0.23 Mn 0.67 V 0.1 O 2 with a thin layer of Na 3 V 2 O 2 (PO 4 ) 2 F to enhance both the electrochemical sodium storage and material air stability. The optimized Na 0.67 Ni 0.23 Mn 0.67 V 0.1 O 2 @5wt %Na 3 V 2 O 2 (PO 4 ) 2 F exhibited a high discharge capacity of 176 mA h g −1 within the 1.5-4.1 V range at a low current density of 17 mA g −1 . At an increased current density of 850 mA g −1 within the same voltage window, it still delivered a substantial initial discharge capacity of 112 mAh g −1 . These findings validate the significant enhancement of ion diffusion capabilities and rate performance in the P2-type Na 0.67 Ni 0.33 Mn 0.67 O 2 material conferred by the composite cathode. Graphical We propose a composite cathode material, Na 0.67 Ni 0.23 Mn 0.67 V 0.1 O 2 @Na 3 V 2 O 2 (PO 4 ) 2 F, featuring synergistic modification through doping and coating. The optimized Na 0.67 Ni 0.23 Mn 0.67 V 0.1 O 2 @5wt %Na 3 V 2 O 2 (PO 4 ) 2 F exhibited a high discharge capacity of 176 mAh g −1 within the 1.5–4.1 V range at a low current density of 17 mA g −1 . At an increased current density of 850 mA g −1 within the same voltage window, it still delivered a substantial initial discharge capacity of 112 mAh g −1 .
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固体化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Jing Li,Zhengguang Shi,Qianru Lin,Yaohui Zhang,Mingxue Huo,You Wang,Hsu-Sheng Tsai
VSe 2 is a promising anode material for Li-ion batteries (LIBs) due to its unique layered structure, and its metallic properties. However, further exploration to investigate the lithium storage performance of VSe 2 is limited by the synthesis difficulty of pure VSe 2 . In this work, a novel nitrogen-doped carbon modified VSe 2 obtained by using p -phenylenediamine as the reducing agent is reported. This material delivers a reversible capacity of 738.25 mA h g −1 at 100 mA g −1 and after 50 cycles, it retains 772.15 mA h g −1 . Using p -phenylenediamine as a reducing agent to obtain VSe 2 is demonstrated for the first time, and p -phenylenediamine also provides carbon and nitrogen sources for the heteroatom modification of VSe 2 . This modification of nitrogen-doped carbon facilitates the generation of new active sites, and improve charge transfer. First-principle calculations show that the diffusion barrier for the Li + migration within the VSe 2 layers is low. The ex-situ X-ray diffraction (XRD) results verify that VSe 2 stores lithium through intercalation and conversion reactions. This work may provide a new solution for synthesizing high-performance transition metal dichalcogenide electrode materials.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
计算材料学
·
无机合成
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2012
·Vol. 378
·期 1
·30-35
·
IF 3.07
Shangkun Li,Xiaofeng Lu,Xiang Li,Yanpeng Xue,Chengcheng Zhang,Junyu Lei,Ce Wang
A reactive-template vapor phase polymerization method for the preparation of bamboo-like polypyrrole (PPy) nanotubes has been successfully demonstrated in this paper. Herein, electrospun V 2 O 5 nanofibers were chosen as templates to deposit PPy, which served as the oxidants as well. This method can provide the fabrication of PPy nanostructures more easily than conventional routes due to its independence of removing template, which is usually a complex and tedious experimental process. The application of bamboo-like PPy nanotubes for Cr(VI) ions removal in aqueous solution has been explored. The resulting bamboo-like PPy nanotubes exhibited much higher adsorption performance than traditional PPy nanoparticles.
研究领域:
环境科学
·
纳米材料
·
高分子化学
·
环境污染治理
·
吸附技术
✓ 已验证
DOI
高影响因子
Cell Reports Physical Science
·
2024
·
IF 7.9
Xiaoyu Huo,Xingyi Shi,Yuran Bai,Yikai Zeng,Liang An
With the escalating utilization of intermittent renewable energy sources, demand for durable and powerful energy storage systems has increased to secure stable electricity supply. Redox flow batteries (RFBs) have received ever-increasing attention as promising energy storage technologies for grid applications. However, their broad market penetration is still obstructed by many challenges, such as high capital cost and inferior long-term stability. In this work, combining the merits of both all-vanadium and iron-chromium RFB systems, a vanadium-chromium RFB (V/Cr RFB) is designed and fabricated. This proposed system possesses a high theoretical voltage of 1.41 V while achieving cost effectiveness by using cheap chromium as one of the reactive species. Experimentally, the system attains a peak power density of over 900 mW cm −2 at 50°C and demonstrates stable performance for 50 cycles with an energy efficiency of over 87%, presenting this system as a promising candidate for large-scale energy storage.
研究领域:
电化学储能
·
能源材料
·
可持续能源技术
·
先进电池系统
·
电网储能
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Dongqiang Gao,Liuting Zhang,Mengchen Song,Fuying Wu,Jiao Wang,Hu Zhao,Hong Li
As a high-density solid-state hydrogen storage material, magnesium hydride (MgH 2 ) is promising for hydrogen transportation and storage. Yet, its stable thermodynamics and sluggish kinetics are unfavorable for that required for commercial application. Herein, nickel/vanadium trioxide (Ni/V 2 O 3 ) nanoparticles with heterostructures were successfully prepared via hydrogenating the NiV-based two-dimensional layered double hydroxide (NiV-LDH). MgH 2 + 7 wt% Ni/V 2 O 3 presented more superior hydrogen absorption and desorption performances than pure MgH 2 and MgH 2 + 7 wt% NiV-LDH. The initial discharging temperature of MgH 2 was significantly reduced to 190 °C after adding 7 wt% Ni/V 2 O 3 , which was 22 and 128 °C lower than that of 7 wt% NiV-LDH modified MgH 2 and additive-free MgH 2 , respectively. The completely dehydrogenated MgH 2 + 7 wt% Ni/V 2 O 3 charged 5.25 wt% H 2 in 20 min at 125 °C, while the hydrogen absorption capacity of pure MgH 2 only amounted to 4.82 wt% H 2 at a higher temperature of 200 °C for a longer time of 60 min. Moreover, compared with MgH 2 + 7 wt% NiV-LDH, MgH 2 + 7 wt% Ni/V 2 O 3 shows better cycling performance. The microstructure analysis indicated the heterostructural Ni/V 2 O 3 nanoparticles were uniformly distributed. Mg 2 Ni/Mg 2 NiH 4 and metallic V were formed in-situ during cycling, which synergistically tuned the hydrogen storage process in MgH 2 . Our work presents a facile interfacial engineering method to enhance the catalytic activity by constructing a heterostructure, which may provide the mentality of designing efficient catalysts for hydrogen storage.
研究领域:
材料科学
·
能源存储
·
纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Xiong Liu,Guobao Xu,Qi Zhang,Shouji Huang,Lun Li,Xiaolin Wei,Juexian Cao,Liwen Yang,Paul K. Chu
Design and fabrication of cathode materials with large capacity and high-rate capability in aqueous zinc ion batteries (AZIBs) are challenging. Herein, ultrathin hybrid nanobelts comprising single-crystalline VO 2 and poly(3,4-ethylenedioxythiophene) (PEDOT) (designated as VO 2 -PEDOT) are synthesized as cathode materials for the AZIBs. The nanobelts have a thickness below 10 nm, large amount of exposed VO 2 (001) facets and discrete PEDOT conductive layers. Systematic structural and electrochemical assessment reveals that simultaneous proton and Zn 2+ insertion into the VO 2 host is efficient in the Zn(CF 3 SO 3 ) 2 electrolyte due to synergistic effects rendered by unique structure of the VO 2 -PEDOT nanobelts. The Zn/VO 2 -PEDOT battery that shows a storage mechanism involving two carriers delivers extraordinary performance including a high capacity of 540 mAhg −1 with 36.3% beyond a high operating voltage of 0.7 V at −0.05 Ag − 1 , high rate capability of 231.2 mAhg −1 at 10 Ag − 1 , excellent cycling stability up to 1000 cycles with capacity retention of 84.5%. Moreover, the 50 μm thick freestanding electrode consisting of ultrathin VO 2 -PEDOT nanobelts has a large areal capacity of 1.35 μAhcm −2 at 5 Ag − 1 . The results provide mechanistic insights into the electrochemistry of VO 2 -based cathodes and reveal a new strategy to improve the performance of the AZIBs especially with regard to grid-scale energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Kailing Sun,Mingrui Liu,Siyan Yu,Huiyu Song,Jianhuang Zeng,Xiuhua Li,Shijun Liao
The Li–O 2 battery is one of the most promising next-generation energy storage systems due to its super-high theoretical energy density . However, its further development is impeded by the current cathode system, which exhibits low energy efficiency and poor cycling stability. Herein, we report a composite of vanadium nitride coated with nitrogen-doped carbon nanoribbons grown in situ on carbon paper (denoted as VN@C) as a novel binder-free cathode for Li–O 2 batteries. We find that the nitrogen-doped carbon coating can significantly improve the stability of VN and enhance the composite's ORR/OER activities. The Li–O 2 batteries with our optimal VN@C-850 cathodes achieve an initial discharge capacity of 8269 mA h g −1 , a discharge-charge voltage gap of 0.88 V, and considerable cycling stability for 183 cycles with a cut-off capacity of 1000 mA h g −1 , compared with 2027 mA h g −1 , 1.21 V, and 12 cycles with uncoated VN cathodes.
研究领域:
电化学
·
能源材料
·
纳米材料
·
电化学储能
·
先进电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 4
·1-12
·
IF 2.8
Ni Wentao,Yang Hengyu,Liu Xiong,Liang Yongle,Wu Banghui,Zhang Huaijun,Xu Guobao,Wei Xiaolin,Yang Liwen
Although vanadium-based compounds are considered to be reliable zinc storage materials due to their high theoretical specific capacity, notorious poor conductivity and unstable structure hamper their practical applications. Herein, novel two-dimensional (2D) sandwich-like heterostructures of amorphous vanadium dioxide uniformly grown on two sides of ultrathin MXene nanosheets (A-VO x /M heterostructures) are constructed by ion adsorption method and following low-temperature annealing, which can be readily incorporated into carbon nanotube (CNT) network to obtain freestanding cathodes for aqueous zinc-ion batteries. The combination of 2D heterostructure, amorphous framework and conductive substrate endows A-VO x /M heterostructures with short ion diffusion pathway, high chemical stability, extra active sites and superior electrical conductivity. The freestanding A-VO x /M heterostructured cathodes for aqueous zinc-ion batteries exhibit a remarkable discharge capacity of 362 mAh g −1 at 0.2 A g −1 and high-rate capability of 202 mAh g −1 at 15 A g −1 as well as admirable cycling stability with a capacity decay of only 0.0043% per cycle over 3000 cycles. Besides, due to the outstanding conductivity and stability of freestanding A-VO x /M heterostructured cathodes, soft-package batteries are assembled with steady electrochemical performance, suggesting brilliant future in the field of energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
固态物理
·
应用化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Peng Li,Lianyi Shao,Pengfei Wang,Xi Zheng,Haoxiang Yu,Shangshu Qian,Miao Shui,Nengbing Long,Jie Shu
In this work, Li 2 NaV 2 (PO 4 ) 3 is successfully synthesized by using a simple solid-state reaction method. Structural analysis shows that this sample is a hybrid product consisted of rhombohedral Li 3 V 2 (PO 4 ) 3 phase and rhombohedral Na 3 V 2 (PO 4 ) 3 phase As a cathode material for lithium ion batteries, Li 2 NaV 2 (PO 4 ) 3 exhibits an initial reversible capacity of 108.9 mAh g −1 at 35 mA g −1 in the potential range between 3.0 and 4.3 V, with an average working potential at 3.75 V. The lithium-ion diffusion coefficient in Li 2 NaV 2 (PO 4 ) 3 is measured to be 1.86–3.27 × 10 −15 cm 2 s −1 . In addition, the electrochemical reaction between Li 2 NaV 2 (PO 4 ) 3 and Li is also investigated by various in-situ and ex-situ techniques. Viewed from the in-situ and ex-situ results, it is concluded that the electrochemical reactions of Li 2 NaV 2 (PO 4 ) 3 with Li are associated with the formation of rhombohedral LiV 2 (PO 4 ) 3 phase and rhombohedral NaV 2 (PO 4 ) 3 phase during the lithium ion extraction process and its reverse lithium insertion process is reversible for structural evolution. The highly stable structure ensures the electrochemical reversibility of Li 2 NaV 2 (PO 4 ) 3 cathode material in lithium ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固体化学
✓ 已验证
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 40
·2303227
·
IF 13.3
YuanZhe Wu,Quan Zong,Chaofeng Liu,Yanling Zhuang,Daiwen Tao,Jiangying Wang,Jingji Zhang,Qilong Zhang,Guozhong Cao
Vanadyl phosphate (VOPO 4 ·2H 2 O) has been regarded as one of the most promising cathode materials for aqueous Zn-ion batteries due to its distinct layered structure. However, VOPO 4 ·2H 2 O has not yet demonstrated the exceptional Zn ion storage performance owing to the structural deterioration during repeated charging/discharging process and poor intrinsic conductivity. In this work, 2D sodium vanadyl phosphate (NaVOPO 4 ·0.83H 2 O, denoted as NaVOP) is designed as a cathode material for Zn-ion batteries, in which sodium ions are preinserted into the interlayer, replacing part of water. Benefiting from the in situ surface oxidization, improved electronic conductivity, and increased hydrophobicity, the NaVOP electrode exhibits a high discharge capacity of 187 mAh g −1 at 0.1 A g −1 after activation, excellent rate capability and enhanced cycling performance with 85% capacity retention after 1500 cycles at 1 A g −1 . The energy storage mechanism of the NaVOP nanoflakes based on the rapid Zn 2+ and H + intercalation pseudocapacitance are investigated via multiple ex situ characterizations.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米材料
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Peipei Dang,Dongjie Liu,Yi Wei,Guogang Li,Hongzhou Lian,Mengmeng Shang,Jun Lin
Phosphor-converted white-light-emitting diodes (pc-WLEDs) rely on combining a near-ultraviolet (n-UV) or blue chip with trichromatic and yellow-emitting phosphors. It is challenging to discover cyan-green-emitting (480–520 nm) phosphors for compensating the spectral gap and producing full-spectrum white light. In this work, we successfully discovered two unprecedented bright cyan-green emitting Rb3RV2O8 (R = Y, Lu) phosphors that gives emission bands centered at 500 nm upon 362 nm n-UV light excitation. Interestingly, the both self-activated compounds exhibit high internal quantum efficiencies (IQEs) of 71% for Rb3YV2O8 and 85% for Rb3LuV2O8, respectively. Moreover, controllable emission color can be successfully tuned from cyan-green to orange-red across the warm white light region by design strategy of VO43– → Eu3+ energy transfer. The thermal quenching of as-prepared phosphors could be effectively mitigated by this design strategy. Finally, the as-fabricated n-UV (λex = 370 nm) pumped phosphor-converted (pc) W-LED devices utilizing Rb3RV2O8 (R = Y, Lu) along with commercial phosphors demonstrate well-distributed warm white light with high color-rendering index (CRI) of 91.9 and 93.5, and a low correlated color temperature (CCT) of 5095 and 4946 K. It suggests that the both vanadate phosphors have potential applications in full-spectrum pc-WLEDs.
研究领域:
材料科学
·
光电子学
·
固态照明
·
无机化学
·
光子学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Guochao Wan,Wenhao Sun,Lei Liu,Changming Mao,Zhonghua Zhang,Xiaosong Guo,Guicun Li
Reducing the free radicals associated with electrochemical reactions and the activity of H2O is an effective measure to inhibit side reactions and improve stability for rechargeable aqueous Zn-ion batteries. Herein, methylsulfonylmethane (MSM), a popular dietary supplement for humans, is used as an innoxious and low-cost additive to scavenge free radicals and optimize the coordination condition for aqueous ZnSO4 electrolyte. Profiting from the double effects of MSM, the Zn∥Ti asymmetric cells exhibit excellent stability and display a high Coulombic efficiency (CE) of 99.5% in the aqueous MSM/ZnSO4 electrolyte for 1000 h, and the Zn∥Zn cells achieve a long cycle life of over 2000 h. In addition, MSM can effectively suppress the dissolution of an ammonium vanadate (NVO) cathode. The positive role of MSM is further exhibited in the Zn∥NVO and Zn∥PANI full cells, exhibiting outstanding charge/discharge performance and capacity retention. This work provides a type of innoxious additive for an aqueous electrolyte for aqueous rechargeable zinc-ion batteries.
研究领域:
材料科学
·
电化学
·
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）