Green Energy & Environment
·
2020
·Vol. 7
·期 1
·53-65
·
IF 6.395
Hong-Li Ding,Hai-Tao Yu,Xiao-dong Wang,Chen-Feng Guo,Bing Zheng,Ying Xie,Ting-Feng Yi
SrLi 2 Ti 6 O 14 (SLTO) coated with different amount of ZrO 2 was successfully prepared. The as-obtained composites are stacked by a series of particles with a pure phase structure and a good crystallinity. Furthermore, ZrO 2 coating not only enhances the structural stability of the materials but also facilitates the diffusion of lithium through the SEI film. As a result, the redox polarization was reduced, and the reversibility of the electrochemical reaction was enhanced. Particularly, SLTO-ZrO 2 -2 sample delivers a high initial lithiation capacity of 283.6 mA h g −1 , and the values maintain at 251.7, 228.0, 207.4, 175.3, and 147.7 mA h g −1 at the current densities of 0.13, 0.26, 0.54, 1.31, and 2.62 A g −1 , respectively. Our experiment also confirmed that SLTO materials coated with ZrO 2 are suitable for high power density applications, and the lithiation specific energy efficiency of SLTO-ZrO 2 -2 is 200% as high as that of pure SLTO at a power density of 1257 W kg −1 .
研究领域:
材料科学
·
电化学
·
能源存储
·
无机非金属材料
·
固态离子学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Wenqiang Hu,Wenbin Fu,Samik Jhulki,Liang Chen,Aashray Narla,Zhijian Sun,Fujia Wang,Alexandre Magasinski,Gleb Yushin
Poor heat/flame-resistance of polyolefin (e.g., polyethylene and polypropylene) separators and high flammability of organic electrolytes used in today's lithium-ion batteries (LIBs) may trigger rare yet potentially catastrophic safety issues. Here, we mitigate this challenge by developing a heat-resistant and flame-retardant porous composite membrane composed of polyetherimide (PEI) and Al 2 O 3 nanowires (NWs). The membranes are fabricated based on an industrially scalable non-solvent-induced phase separation process, which results in an intimately interconnected porous network of Al 2 O 3 NWs and PEI . The produced composite membranes exhibit excellent flexibility, thermal stability, and flame-retardancy. Importantly, the composite membranes exhibit minimal thermal shrinkage and superior tensile strength (16 MPa) at temperatures as high as 200 °C, significantly exceeding the performance of conventional polyolefin separators. Compared with commercial separators, their superior wettability and higher ionic conductivity (by up to 2.4 times) when filled with the same electrolyte, larger electrolyte uptake (∼190 wt.%), as well as improved cycle and rate performance demonstrated in LiNiMnCoO 2 (NCM)-based LIBs make them attractive choices for a variety of electrochemical energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子科学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Wenyuan He,Xuejun Zheng,Jinfeng Peng,Qiang Zhang,Dazhao Pei,Xinyang Yan
A facile one-step solid-phase synthesis strategy is developed for synthesizing a binder-free molybdenum disulfide/carbon fibers paper (MoS 2 /CFP) anode. The microstructure, composition, morphology and electrochemical performances were investigated. It is found that the thin MoS 2 layers are well anchored on the interlaced carbon fibers to form MoS 2 /CFP, which has mesoporous structure and large specific surface area of ∼18.8 m 2 g -1 . As a result, the obtained MoS 2 /CFP anode exhibits a reversible capacity of 261 mAh·g −1 with 31.2% loading ratio of MoS 2 . After subtracting the capacity of CFP, the MoS 2 in the composite anode delivers a reversible capacity of 539 mAh·g −1 and shows better cycle stability than commercial MoS 2 after 100 cycles at 100 mA g −1 . The remarkable electrochemical performances could be attributed to the buffer space among carbon fibers for the volume changes of MoS 2 as well as the highly conductive carbon fibers network, suggesting that the MoS 2 /CFP is a promising binder-free anode for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2024
·
IF 3.7
Xiangyi Kong,Jie Cheng,Wei Meng,Shujing Han,Zhen Song,Zhiwen Qi
As a volatile organic compound (VOC), styrene can pose significant risks to human health and environment if released into the air without proper treatment. Absorption based on ionic liquids (ILs) has been widely regarded as a promising VOC treatment approach, whereas there is limited research on capturing styrene by ILs. In this work, a multilevel framework was proposed to screen IL absorbents from the largest number of cation-anion combinations in the latest COSMObase. The COSMO-RS model is applied to estimate the absorption and desorption potentials of all IL candidates for styrene capture based on solubility prediction, while important physical properties of them namely melting point, viscosity, and toxicity are estimated by a recently-reported deep learning model. A parallel screening specific to the commercially available ILs in the initial candidate database was also performed. The top-ranked three ILs, identified in both scenarios with and without limiting the commercially availability, were further evaluated in a simulated absorption-desorption process in Aspen Plus. The most promising ILs in each scenario were figured out, which vividly demonstrates the value of discovering novel ILs.
研究领域:
环境化学
·
化学工程
·
绿色溶剂
·
计算化学
·
大气污染控制
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Kaiqiang Wu,Jie Shu,Xiaoting Lin,Lianyi Shao,Peng Li,Miao Shui,Mengmeng Lao,Nengbing Long,Dongjie Wang
A series of Na x Li 4−x Ti 6 O 14 (0 ≤ x ≤ 4) are prepared by solid-state method and their structures, morphologies and electrochemical properties are compared by changing the Na/Li atomic ratio. It can be found that two single-phase samples of Na 2 Li 2 Ti 6 O 14 and Na 4 Ti 6 O 14 and three multi-phase samples of Li 4 Ti 6 O 14 (Li 4 Ti 5 O 12 /TiO 2 ), NaLi 3 Ti 6 O 14 (Na 2 Li 2 Ti 6 O 14 /Li 4 Ti 5 O 12 /TiO 2 ) and Na 3 LiTi 6 O 14 (Na 2 Li 2 Ti 6 O 14 /Na 2 Ti 3 O 7 ) can be formed by using a stoichiometric ratio of starting materials based on the formula of Na x Li 4−x Ti 6 O 14 . Besides, different Na/Li atomic ratios in Na x Li 4−x Ti 6 O 14 also induce the morphology evolution shifting from round-shape to polyhedron-shape, and then to square-shape with the increase of Na content. Electrochemical tests show that Li 4 Ti 6 O 14 delivers the highest charge capacities of 116 mAh g −1 at 100 mA g −1 , 91.5 mAh g −1 at 200 mA g −1 , 77.5 mAh g −1 at 300 mA g −1 and 66.9 mAh g −1 at 400 mA g −1 among five samples. For comparison, Na 4 Ti 6 O 14 only reveals the reversible capacities of 38.6 mAh g −1 at 100 mA g −1 , 30.2 mAh g −1 at 200 mA g −1 , 24.8 mAh g −1 at 300 mA g −1 and 20.9 mAh g −1 at 400 mA g −1 . It suggests that Li 4 Ti 6 O 14 is the most potential lithium storage material among all the Na x Li 4−x Ti 6 O 14 samples.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
功能材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Lili Chai,Qunting Qu,Longfei Zhang,Ming Shen,Li Zhang,Honghe Zheng
Chitosan was applied as the electrode binder material for a spherical graphite anode in lithium-ion batteries. Compared to using poly (vinylidene fluoride) (PVDF) binder, the graphite anode using chitosan exhibited enhanced electrochemical performances in terms of the first Columbic efficiency, rate capability and cycling behavior. With similar specific capacity, the first Columbic efficiency of the chitosan-based anode is 95.4% compared to 89.3% of the PVDF-based anode. After 200 charge–discharge cycles at 0.5 C , the capacity retention of the chitosan-based electrode showed to be significantly higher than that of the PVDF-based electrode. Electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) measurements were carried out to investigate the formation and evolution of the solid electrolyte interphase (SEI) formed on the graphite electrodes. The results show that a thin, homogenous and stable SEI layer is formed on the graphite electrode surface with chitosan binder compared with that using the conventional PVDF binder
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
纳米材料
·
界面化学
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2017
·
IF 2.354
Leyu Zhan,Yao Zhang,Xiangyang Zhuang,Hui Fang,Yunfeng Zhu,Xinli Guo,Jian Chen,Zengmei Wang,Liquan Li
The x LiBH 4 -Li 3 N ( x = 1, 2, 4) composites were investigated on their lithium ionic conductivities . They maintained the original phase structures of orthorhombic LiBH 4 and hexagonal β-Li 3 N during ball milling according to the analyses by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Electrochemical impedance spectra (EIS) tests showed that LiBH 4 -Li 3 N composites lift the lithium ionic conductivities from that of bulk LiBH 4 by nearly 100 times at low temperature. LiBH 4 -Li 3 N offers 1.06 × 10 − 5 S cm − 1 of conductivity while bulk LiBH 4 possesses only 2.05 × 10 − 7 S cm − 1 at 323 K. Cyclic voltammetry (CV) tests indicated that the voltage window of composites could attain 3 V, which is much more stable than Li 3 N (< 1 V). No thermodynamic incident appears in DSC curves except for the orthorhombic-hexagonal transition endothermic peak of LiBH 4 in the x LiBH 4 -Li 3 N composites. It confirms the phases stabilities of the x LiBH 4 -Li 3 N ( x = 1, 2, 4) composites before and after CV tests. In-situ solid state Nuclear Magnetic Resonance (NMR) tests on LiBH 4 -Li 3 N illustrated that the high conductivity in low temperature should not come from high-temperature phase of LiBH 4 . Therefore, the enhancement of lithium ionic mobility of the composite might be attributed to both Li 3 N and the interfaces between small crystallites where transmission electron microscope (TEM) morphology showed the appearance of amorphous grain boundary.
研究领域:
材料科学
·
固态离子学
·
能源化学
·
电化学
·
纳米材料
·
固体电解质
·
锂离子电池
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jiaxu Cheng,Jinghan Qiao,Zongyang Yang,Bowen Zhu,Jianguo Duan,Ding Wang,Rui Huang,Yingjie Zhang,Zhongren Zhou,Peng Dong
One of the key efficient strategies to optimize the silicon micro-structure and to improve the lithium-storage electrochemical performance is to introduce the metallic phase into silicon matrix to realize the silicon-metal recombination as well as the nanocrystallization of silicon structure. The present research introduced metallic titanium to synthesis TiSi 2 /Si nanocomposites by the aid of electrolyzing SiO 2 /TiO 2 in molten salt. The reduced nanocomposites exhibited excellent lithiation stability with the initial discharging specific capacity of 2107 mA h/g and the first columbic efficiency of 89.96%. Particularly benefiting from the compositional TiSi 2 phase and the structural superiority of silicon nanowires surrounded by the alloyed nanoparticles , the as-obtained anode also delivered a high rate capacity. The major objective of this study is to establish the technology for molten salt electrolytic preparation of TiSi 2 /Si nanocomposites for lithium-ion batteries and further to offer solutions for modifying the silicon anode materials .
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机非金属材料
✓ 已验证
DOI
高影响因子
Advanced Science
·
2019
·Vol. 6
·期 17
·1900381
·
IF 15.804
Jian Lin,Lin Zhu,Zenghui Yue,Chuang Yang,Wei Liu,Thomas E. Albrecht-Schmitt,Jian-Qiang Wang,Shuao Wang
Various types of polyoxometalates (POMs) have been synthesized since the 19th century, but their assortment has been mostly limited to Groups 5 and 6 metals. Herein, a new family of POMs composed of a carbon group element as the addenda atoms with two distinct phases, LnPbOClO 4 -1 (Ln = Sm to Ho, Y) and LnPbOClO 4 -2 (Ln = Er and Tm) is reported. Both structures are built from [Ln 6 O 8 ] rare-earth metal hexamers being incorporated in [Pb 18 O 32 ]/[Pb 12 O 24 ] polyplumbites, and unbound perchlorates as charge-balancing anions. Impressively, YPbOClO 4 -1 and ErPbOClO 4 -2 exhibit exceptional uptake capacities (434.7 and 427.7 mg g −1 ) toward ReO 4 − , a chemical surrogate for the key radioactive fission product in the nuclear fuel cycle 99 TcO 4 − , which are the highest values among all inorganic anion-exchange materials reported until now. The sorption mechanism is clearly elucidated and visualized by single-crystal-to-single-crystal structural transformation from ErPbOClO 4 -2 to a perrhenate-containing complex ErPbOReO 4 , revealing a unique ReO 4 − uptake selectivity driven by specific interaction within Pb···O-ReO 3 − bonds.
研究领域:
无机化学
·
放射化学
·
环境化学
·
材料科学
·
核燃料循环
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 110
·108791-108800
·
IF 3.289
Wei Zhou,Haiqian Zhao,Jihui Gao,Xiaoxiao Meng,Shaohua Wu,Yukun Qin
The Fenton system (Fe2+/H2O2) generates ·OH with a high oxidation potential. However, as reactants themselves, H2O2 and Fe2+ can act as ·OH initiators as well as ·OH scavengers, leading to the need for a high dosage of reactants and increased costs. As a mixing-sensitive reaction, the ·OH-related reaction kinetics (·OH with Fe2+, H2O2, and RhB) was determined from the reaction rates (which were a constant in this work) and stoichiometry, in which the latter could be regulated by an addition strategy of Fenton reagents. This suggests that ·OH competitive reactions could be controlled by applying a macrolevel addition strategy. Herein, the effects of different addition approaches of Fe2+ and H2O2 on ·OH competitive reactions were quantitatively and systematically studied by analyzing the removal of the model pollutant RhB. We found that without stirring, and compared with a one-time addition, once H2O2 or Fe2+ was added in a step-wise pattern (e.g., one drop by one drop, 2 times, or 4 times), a high concentration of H2O2 or Fe2+ existed in a localized place for a longer period, resulting in a lower proportion of ·OH reacting with RhB, which we ascribed to an enhanced reaction between Fe2+, H2O2, and ·OH. However, when H2O2 and Fe2+ were added from two close points without stirring, a larger proportion of ·OH was scavenged by H2O2 and Fe2+; while under stirring, even a one-time addition of H2O2 or Fe2+ could cause severe scavenging of ·OH. The results also revealed a linear relationship between the RhB removal percentage and wavelength blue-shifts. This study showed that microlevel ·OH competitive reactions could be controlled by applying a macrolevel addition strategy of Fenton reagents without the addition of external chemicals. The results suggest this methodology can also offer an approach to lower ·OH invalid consumption by regulating the addition strategy in bigger reactors.
研究领域:
环境化学
·
水处理技术
·
高级氧化过程
·
反应动力学
·
污染控制化学
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
R.J. Wang,L.W. Zhang,R. Liu,L. Liu,J.M. Yao
Novel, portable, probe-free, liquid cellulose biosensor was explored via a facile one-pot process for Cu 2+ ions detection by naked eyes. The as-prepared biosensor displayed specific recognition towards Cu 2+ ions in aqueous solution, even in complex urine and serum samples within 10 s, showing fast response characteristic. There is barely any interference on the Cu 2+ ions detection by other metal ions or other complex substances in urine and serum, and the corresponding detection limit is as low as 1.185, 1.9309 and 1.9154 ppm, respectively. Moreover, the cellulose biosensor could act as an excellent candidate to sense Cu 2+ ions in biological samples including urine and serum from SD rats with satisfying accuracies and biocompatibility. This study exploits a potential application of cellulose in biosensing and monitoring related to Cu 2+ ions.
研究领域:
分析化学
·
生物传感
·
环境监测
·
临床诊断
·
材料科学
·
毒理学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2015
·Vol. 7
·期 9
·4171-4178
·
IF 7.394
Tingting Li,Huanhuan Li,Zhennan Wu,Hongxia Hao,Jiale Liu,Tingting Huang,Haizhu Sun,Jingping Zhang,Hao Zhang,Zuoxing Guo
The excellent electrochemical performance of greigite (Fe3S4) coupled with its vast abundance and low toxicity make it a good prospect as an anode material for lithium ion batteries (LIBs). In this research, a simple and feasible approach for producing pure phase, small sized, shape-controllable, and stable Fe3S4 nanoplates (NPs) through hot injection of sulfur solution into Fe(III) solution was demonstrated. The growth of Fe3S4 NPs involves the primary formation of a pyrite (FeS2) nucleus and subsequent Fe(III) doping. The lateral size of the Fe3S4 NPs was controlled further by tuning the experimental variable-dependent reactivity of Fe sources in the nucleation and growth stage. The Fe3S4 NPs embedded in LIBs present a low electrochemical resistance and are highly active in lithiation/delithiation processes.
研究领域:
材料科学
·
纳米科技
·
电化学
·
能源存储
·
无机化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）