JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
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IF 3.807
Kui Liu,Yufeng Gao,Zhengyan Fang,Xiangyu Zhou,Yue Ma,Hanyu Wu,Mingliang Kang,Biao Wang
In the electrowinning or chemical reductive extraction process, those mass transfer kinetic parameters , for instance the diffusion coefficient in the liquid cathode or medium, have a strong impact upon the practical extraction rate and separation efficiency. This work aims to calculate the diffusion coefficient of uranium in liquid gallium with galvanostatic intermittent titration technique (GITT) and to deduce its corresponding activation energy . By analyzing the data of GITT, before U saturation in liquid gallium at the temperature range of 673-873 K, the temperature dependence of diffusion coefficients of uranium in liquid gallium was measured as ln D U Ga = − 6.90 ± 1.03 − 1.2 ± 0.8 × 10 3 T and the corresponding activation energy was determined as E a = −11.0 ± 6.7 kJ/mol. The possible source of errors to calculate the diffusion coefficients, such as reference electrode, small solubility of uranium in gallium, side reactions and geometrical approximation of cathode in the theory formula are also presented and discussed.
研究领域:
材料科学
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化工工程
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核工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Tao Zhou,Lingling Xie,Qing Han,Xinli Yang,Limin Zhu,Xiaoyu Cao
For cost and safety reasons, aqueous batteries are suitable for large-scale energy storage. Among all aqueous batteries, rechargeable aqueous zinc-ion batteries (ZIBs) are promising choices owing to the low equilibrium potential and high volumetric capacity of zinc. However, its development is also severely hindered by the limited available cathode materials, which generally display poor cycling capabilities. As one of the most investigated POVs (polyvanadates) today, (V 10 O 28 ) 6− has been demonstrated to be feasible in energy storage rely on the well-defined structure and fascinating material activity. Herein, we propose a polyvanadate-Na 6 V 10 O 28 with (V 10 O 28 ) 6− anion as a support structure and serve it for the first time as an aqueous ZIBs cathode. The high stability of the (V 10 O 28 ) 6− cluster permits the material to tolerate the reversible (de)insertion of Zn 2+ . As a result, the Na 6 V 10 O 28 cathode delivers a high capacity of 279.5 mAh g −1 after activation and an extraordinary lifespan over 2000 cycles. Furthermore, the pseudocapacitance analysis and GITT test reveal the pseudocapacitance behavior and high Zn 2+ diffusion coefficient (10 −10 cm 2 s −1 ) of the Na 6 V 10 O 28 /Zn cell, respectively. Not only that, ex-situ XRD, XPS, and TEM are also employed to analyze the storage mechanism of Zn 2+ , indicating the synergistic zinc-storage capacity of Na 6 V 10 O 28 and irreversible products. Overall, this work presents new insights into the application of Na 6 V 10 O 28 in aqueous ZIBs and also demonstrates the competitive potential of POVs for energy storage.
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
高影响因子
Energy Storage Materials
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2024
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IF 18.9
Rongzheng Tian,Shan Yin,Zhenyu Wang,Kai Liu,Lianqi Zhang,Lingyun Zhu
Single-crystal LiNi x Co y Mn 1-x-y O 2 (SC-NCM) cathodes design is an effective solution for enhancing electrochemical performance of all-solid-state lithium battery (ASSLBs). For highly Ni-rich SC cathode (Ni>90 %), the accumulation of local stress caused by anisotropic lattice shrinkage at deeply charging state is more destructive, and even SC-NCM design can not prevent the structure damage and interfacial contact failure between cathode and solid electrolyte (SE). In this work, small-size single-crystal design and Al-doping strategy are firstly combined to synthesize LiNi 0.91 Co 0.04 Mn 0.04 Al 0.01 O 2 (S-SC-NCMA) cathode. Electrochemistry test, CP-SEM, GITT and in-situ EIS techniques are combined to reveal the interfacial evolution of cathode/SE. The kinetic limitation caused by local contact failure of cathode/SE and the formation of intergranular crack under high voltage are the main reason for capacity loss of ASSLBs. Small-size single-crystal design can reduce the volumetric strain effect and Al-doping strategy can further inhibit lattice shrinkage to improve contact. This work provides an effective cathode modification strategy for highly Ni-rich NCM (Ni>90 %) cathode to improve high-voltage performance of sulfide-based ASSLBs.
研究领域:
材料科学
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电化学
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储能技术
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锂离子电池
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
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2022
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IF 4.654
Fangzhao Pu,Xuecheng Zheng,Xintian Zhao,Xiaojing Zhang,Zhimao Yang,Hong Jin,Chuncai Kong
From the perspective of promotion of metal oxide anodes’ performance, structural design and reinforcement of carbon materials are always concerned as useful methods. In addition, high hope is being placed on the use of graphene as an ideal potential carbon reinforcement material for an abundant energy market, but currently, commercial graphene has poor intrinsic properties, which hamper its development in the energy storage area. Therefore, combining the metal oxide materials with commercial graphene by a rational structure design could be a more hopeful method to realize the productive use of commercial graphene in the energy storage area. In this work, hollow cupric oxide (CuO) decorated on reduced graphene oxide (rGO) is prepared by an effective glycol–water combined rapid oxidation strategy. The well-designed composite yields a high initial capacity of 1491 mAh/g and maintains 960 mAh/g after 500 cycles at 1.0 A/g. The remarkable reversible capacity may be attributed not only to the hollow structure of CuO, but also to the bidirectional synergy between graphene and the small-sized CuO. The galvanostatic intermittent titration technique (GITT) and density functional theory (DFT) calculation are conducted to analyze the relationship between the electrochemical properties and surface states. The GITT test shows that the ion diffusion coefficient is higher when the smaller hollow CuO is decorated on rGO. Additionally, the DFT results indicate that more active electrons appear on the surface of the composite. As a result, the as-prepared hollow and smaller CuO-decorated rGO presents excellent performance in terms of specific capacity and rate capability.
研究领域:
材料科学
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能源存储
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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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Hankun Tan,Li Sun,Feng Xie,Jingjing Hu,Yaru Qu,Yihe Zhang
An alkali-treated MXene-SnS hybrid was prepared through hydrothermal methods. The Alk-MXene microplates provide highway for electronic transport, and the 3D wrinkled morphology ensures sufficient channels for Li + diffusion. The alkali treatment of MXene gives Alk-MXene@SnS enhanced binding strength, which allows the SnS nanosheets to remain firm binding with the Alk-MXene substrate during cycling and overcome capacity decay caused by large volume change. The synergy between the two components guarantees the hybrid excellent electrochemical properties by enabling high electronic/ionic conductivity and superior kinetic properties as evidenced by EIS, GITT tests and DFT calculation. As a result, the Alk-MXene@SnS retains specific capacities of 519 mAh/g after 100 cycles at 200 mA g −1 , and 330 mAh/g at the high rate of 8000 mA g −1 . In addition, a reversible capacity of 421 mAh/g can be provided after long term cycle test at 1000 mA g −1 for 800 cycles.
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
SOLID STATE IONICS
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2020
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IF 3.107
Jian Liu,Ying-Ge Xu,Ling-Bin Kong
Sodium-ion batteries (SIBs) and Sodium-ion capacitors (SICs) have great promise for large-scale energy storage. However, the mismatch of electrode kinetics and charge-storage capacity between anode and cathode materials remains a challenge. Here three-dimensional self-assembled MoS 2 /SnS 2 -reduced graphene oxide (MoS 2 /SnS 2 -RGO) anode material with fast Na-ion diffusion rate and pseudocapacitive charge storage has been successfully prepared via a facile hydrothermal method . With this particular structure, the Na-ion diffusion coefficient of MoS 2 /SnS 2 -RGO calculated by GITT achieves 5.53 × 10 −7 cm 2 s −1 during the desodiation process, which effectively improves the reaction kinetics for anode material. When tested against metal sodium in the potential window of 0.01–3.00 V, the optimized MoS 2 /SnS 2 -RGO delivers an excellent reversible capacity of 818.9 mA h g −1 at a specific current of 100 mA g −1 after 100 cycles and a superior rate capability of 555.4 mA h g −1 at 2000 mA g −1 over 500 cycles. So far, MoS 2 /SnS 2 -RGO possesses the highest reversible capacity among the reported anode materials . Furthermore, a SIC composed of optimized MoS 2 /SnS 2 -RGO anode and a CC cathode reaches a high specific energy of 113.9 W h kg −1 at specific power of 561.25 W kg −1 . Similarly, a SIB consisted of the MoS 2 /SnS 2 -RGO anode and a Na 3 V 2 (PO 4 ) 3 /C cathode displays the reversible discharge capacity of 56 mA h g −1 at the high rates of 2 C.
研究领域:
材料科学
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能源存储
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电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
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2024
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IF 10.7
Jingya Liu,Xin Xu,Hongkang Wang,Peng-Fei Wang,Kai Wu,Yonghong Cheng,Bing Xiao
The ammonization treatment is applied to a prototype ordered double-transition metal MXene known as Mo2TiC2Tx at different annealing temperatures (400, 500 and 600 °C) and durations (1 h and 2 h). The lattice structures, micro-morphologies, and chemical compositions of the resulting ammoniated MXenes are characterized by XRD, SEM, TEM, XPS and EPMA. All ammoniated MXenes preserve the layered microstructure of the parent carbide 2D material, and N atoms are successfully doped into the lattice sites to form carbonitride MXenes, denoted as Mo2Ti(C1−δNδ)2Tx. The Hall measurements are carried out to evaluate the electrical conductivity of ammoniated MXenes and raw Mo2TiC2Tx, and the results indicate that the carbonitride forms exhibit higher electrical conductivities and electron concentrations than the raw 2D material. The electrochemical properties of ammoniated MXenes are investigated by means of charge–discharge cycling CV tests, the GITT and EIS measurements at various scan rates. The ammoniated MXene sample (N400-1h) could deliver a storage capacity of 750 mA h g−1 (200 mA h g−1) at a current density of 0.03 A g−1 (2 A g−1). It is found that the capacitive charge storage mechanism through the intercalation reaction process dominates the total capacity for the ammoniated MXenes. The diffusion dynamics of Li+ in all investigated MXene electrodes show a two-stage lithiation mechanism in which the apparent diffusion coefficient is regulated by the different numbers of vacancies in the absorbate layers at various lithiation stages in the GITT curves. Overall, ammoniated MXenes also show superior performances in Li+ diffusion dynamics and charge transfer kinetics at the electrode–electrolyte interface to those of raw Mo2TiC2Tx, elucidating a new avenue for the use of ammoniated double-transition metal o-MXenes as high-performance electrode materials for LIBs and supercapacitors in the future.
研究领域:
材料科学
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电化学
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能量存储
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
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2024
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IF 7.6
Mukhtiar Ali,Qing Wang,Zhuanxia Zhang,Xing Chen,Min Ma,Zhiwen Tang,Rui Li,Biao Tang,Zhongyuan Li,Xiangfeng Huang,Xin Song
There is a lack of knowledge on the biodegradation mechanisms of benzene and benzo[a]pyrene (BaP), representative compounds of polycyclic aromatic hydrocarbons (PAHs), and benzene, toluene, ethylbenzene, and xylene (BTEX), under individually and mixed contaminated soils. Therefore, a set of microcosm experiments were conducted to explore the influence of benzene and BaP on biodegradation under individual and mixed contaminated condition, and their subsequent influence on native microbial consortium. The results revealed that the total mass loss of benzene was 56.0% under benzene and BaP mixed contamination, which was less than that of individual benzene contamination (78.3%). On the other hand, the mass loss of BaP was slightly boosted to 17.6% under the condition of benzene mixed contamination with BaP from that of individual BaP contamination (14.4%). The significant differences between the microbial and biocide treatments for both benzene and BaP demonstrated that microbial degradation played a crucial role in the mass loss for both contaminants. In addition, the microbial analyses revealed that the contamination of benzene played a major role in the fluctuations of microbial compositions under co-contaminated conditions. Rhodococcus, Nocardioides, Gailla, and norank_c_ Gitt-GS-136 performed a major role in benzene biodegradation under individual and mixed contaminated conditions while Rhodococcus, Noviherbaspirillum, and Phenylobacterium were highly involved in BaP biodegradation. Moreover, binary benzene and BaP contamination highly reduced the Rhodococcus abundance, indicating the toxic influence of co-contamination on the functional key genus. Enzymatic activities revealed that catalase, lipase, and dehydrogenase activities proliferated while polyphenol oxidase was reduced with contamination compared to the control treatment. These results provided the fundamental information to facilitate the development of more efficient bioremediation strategies, which can be tailored to specific remediation of different contamination scenarios.
研究领域:
环境科学
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微生物学
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生物修复
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土壤污染
✓ 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）