CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Xianbo Yu,Guangyu Zhao,Huihuang Huang,Chao Liu,Pengbo Lyu,Naiqing Zhang
Li + /Mg 2+ hybrid-ion batteries (LMIBs), integrating the merits of lithium ion batteries (LIBs) and magnesium ion batteries (MIBs) are considered as an attractive alternative of next generation metal secondary batteries. Due to the sluggish solid-state diffusion kinetic induced by the strong Coulombic interaction between Mg 2+ and host materials, pristine MoS 2 with interplanar distance of 0.62 nm exhibits inferior electrochemical performance for LMIBs with only Li + intercalation. Herein, we report an oxygen-incorporated MoS 2 (O-MoS 2 ) nanoflower anchored on graphene (O-MoS 2 /G) with the interplanar distance of O-MoS 2 from 0.62 nm expanded to 0.885 nm. Even at 1000 mA g −1 , the expanded interlayer spacing can still ensure the Mg 2+ and Li + intercalation/deintercalation into/from the host material simultaneously. Meanwhile, this configuration can effectively reduce the diffusion barrier of metal ions , increase the intercalated number of ions, and enhance the stability of structure. In addition, we found and demonstrated the intercalated Li + had a boosting effect to the intercalation kinetics of Mg 2+ . Compared with the MIBs, the migration energy barriers of Mg 2+ under the existence of Li + intercalating into MoS 2 is reduced from 0.36 eV to 0.16 eV, meanwhile the corresponding intercalation capacity and diffusion coefficient of Mg 2+ are 1.38 and 7.1 times as large as MIBs. As expect, the O-MoS 2 /G exhibits superior rate capability and cycling performance with a reversible capacity of 123.3 mAh g −1 after 2000 cycles charge–discharge processes at 1000 mA g −1 .
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高影响因子
IONICS
·
2021
·Vol. 28
·期 1
·85-97
·
IF 2.817
Wang Xin,Hua Haiming,Li Jiyang,Shen Xiu,Xie Xiaohua,Zhang Peng,Zhao Jinbao
Polyethylene oxide (PEO) was one of the most classic and widely used solid polymer electrolyte matrixes. In this work, we added the previously synthesized titanium dioxide (B-P25) fillers with oxygen vacancies to the PEO-LiClO 4 solid electrolyte system. It is found that compared with the pristine P25 fillers, the oxygen vacancies lead to the decrease of ionic conductivity and the Li + transference number. Infrared and Raman spectroscopy shows that the introduction of oxygen vacancies lead to the formation of Li + -ClO 4 − ion pairs and the decrease of carrier concentration resulted in the decrease of Li + conductivity. Further theoretical calculations verified that this is due to the preferential combination of oxygen vacancies and ether oxygen atoms of PEO. This finding effectively supplements the effect of oxide oxygen vacancies on the conduction of Li + in the PEO matrix, and not all oxygen vacancies are beneficial to the conduction of Li + ions in the PEO matrix.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yue Ma,Qifang Sun,Su Wang,Ying Zhou,Dawei Song,Hongzhou Zhang,Xixi Shi,Lianqi Zhang
Favorable interface is essential for the implementation of high energy density and high safety solid-state lithium metal battery (SSLMB). The in-situ transformation of electrolyte from liquid to solid-state is of great significance for the compatibility of interface. Herein, an in-situ polymerized glycerin triglycidyl ether (PGTE) solid polymer electrolyte (SPE) featuring excellent ion transfer capability, superior interfacial compatibility and cross-linked structure is developed by the initiation of optimal LiDFOB following cationic catalytic mechanism. Ionic conductivity of 4.16 × 10 -4 S cm −1 is achieved at 60 °C due to the superiority of oxyethylene repeating units (C–C-O/C-O-C), and a discharge capacity of 135.2 mAhg −1 is obtained after 200 cycles at 0.2C for LiFePO 4 (LFP)/PGTE/Li battery. More importantly, as a Li salt initiated SPE, the in-situ polymerization process of PGTE is firstly investigated via ex-situ FT-IR, the ring opening catalytic activity of Lewis acid on epoxide is evaluated and the order of LiDFOB＞LiPF 6 ＞AlCl 3 is revealed. Furthermore, the effect of in-situ prepared SPE on electrode/electrolyte interface is innovatively explored using in-situ electrochemical impedance spectroscopy (EIS). The stable interfacial passivation layer is generated at platform voltage and the maximum value of average diffusion coefficient is also obtained at the plateau.
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高影响因子
AIP Advances
·
2019
·Vol. 9
·期 2
·
IF 1.579
Li Sheng,Lan Lifang,Lu Lu,Lu Yan,Li Shaofang,Li Jun,Pan Chunyang,Zhao Fenghua
To investigate the effect of Ce doping on structure and the electrochemical properties of spinel LiNi 0.5 Mn 1.5 O 4 , especially the cycling performance at high temperature, spinel cathode materials LiNi 0.5-0.5x Mn 1.5-0.5x Ce x O 4 (x = 0, 0.01, 0.02, 0.03) were prepared by the sol-gel method for use in lithium ion batteries. For this purpose a half-cell was assembled with a lithium metal anode and a full-cell was paired with graphite. The characterization and analysis of the prepared LiNi 0.5-0.5x Mn 1.5-0.5x Ce x O 4 (x = 0, 0.01, 0.02, 0.03) composites revealed that all of the samples had a disordered spinel octahedron structure, and that the purity of the phase increased after appropriate Ce doping. Compared to the pristine sample, the prepared LiNi 0.495 Mn 1.495 Ce 0.02 O 4 , (x = 0.02) had outstanding electrochemical performance with an initial capacity of 133.8 mAh/g, and 131.9 mAh/g at 1 C and 55 °C after 50 cycles, and maintained a capacity retention value of 98.6% at 1 C and 25 °C at the 100th cycle. The introduction of Ce as dopant improved the electrochemical performance of LiNi 0.5 Mn 1.5 O 4 as a result of the synergistic effects of stronger structural stability, higher lithium ion diffusion coefficient, and lower electrochemical polarization.
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高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2019
·Vol. 99
·期 10
·4772-4780
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IF 2.422
Zhibing Huang,Lijuan Zhang,Heng Gao,Yanling Wang,Xiujiang Li,Xinyu Huang,Ting Huang
BACKGROUND Monascus , a filamentous fungus, produces many bioactive substances. However, in the process of fermentation, Monascus also produces the mycotoxin citrinin. Owing to the presence of citrinin, the safety of Monascus products has been questioned and their wide application limited. Using soybean isoflavones (SI) as exogenous additives, alterations in citrinin production by Monascus aurantiacus Li AS3.4384 (MALA) in different media used for liquid state fermentation were investigated. RESULTS Results showed that the citrinin concentration was 95.98% lower than that of the control group after 16-days fermentation when 20.0 g L −1 SI were added to rice powder and inorganic salt medium. Citrinin production was reduced by 97.24% after 12-days fermentation with 10.0 g L −1 SI in starch inorganic salt medium; 82.52% after 20-days fermentation with 20.0 g L −1 SI in starch peptone medium with high starch content; 45.07% after 14-days fermentation with 5.0 g L −1 SI in starch peptone medium with low starch content; and 82.21% after 14-days fermentation with 20.0 g L −1 SI in yeast extract sucrose medium. CONCLUSION The developed method of removing citrinin is simple, safe, and effective, and it can be applied to reduce the citrinin content of Monascus products. © 2019 Society of Chemical Industry
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2019
·Vol. 33
·期 3
·e4778
·
IF 3.259
Jicheng Xu,Zhilong Pu,Xuechao Xu,Yuanyuan Wang,Dongya Yang,Tao Zhang,Fengxian Qiu
With the gradual exhaustion of land mineral resources, oceans and lakes have attracted world attention because they are abundant in inorganic mineral resources including lithium, potassium, rubidium and cesium. Lithium is becoming the key material in manufacturing of primary and secondary batteries used in various portable devices and hybrid/electric vehicles. Rubidium has been widely applied inglobal positioning satellites, magneto-optic modulators, solid-state lasers, phosphors, and glass manufacturing. In this work, a novel dual-functional magnetic ion imprinting polymer (Fe 3 O 4 @SiO 2 @IIPs) powder was prepared using 12-crown-4 (12C4) and 18-crown-6 (18C6) as functional monomer, and characterized by FT-IR, elemental analysis, XRD, TGA, SEM and TEM. The adsorption performance of Fe 3 O 4 @SiO 2 @IIPs for simultaneous adsorption of lithium and rubidium from simulative salt lakes was evaluated by batches of experiments at various pH values, contact time, and initial concentrations. Kinetic experiments show that the adsorption process followed the pseudo second order kinetic model. Langmuir adsorption isotherm model and Freundlich adsorption equilibrium data were fitted; the results show that Langmuir isotherm model is more suitable for the adsorption process. Additionally, Fe 3 O 4 @SiO 2 @IIPs exhibit specificity towards Li(I) and Rb(I) and low competitive behavior with Na(I), K(I) and Mg (II). Additionally, the selectivity properties, reusability and adsorption thermodynamic were also investigated. The obtained results show that the prepared Fe 3 O 4 @SiO 2 @IIPs material remains high adsorption capacities after five cycles, exhibits excellent abilities to simultaneously and selectively recover Li + and Rb + and have a promising application in the simultaneous adsorption of lithium and rubidium ions.
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高影响因子
Energy Storage Materials
·
2019
·
IF 0
Jing Tian,Xuejun Zhou,Qingping Wu,Chilin Li
Mg-based batteries modulated by Li-salt additive can bypass the sluggish Mg solid diffusion at cathode side by kinetically better Li intercalation. However for this dual-salt system the highly electroactive cathodes endowed with high intrinsic conductivity and multi-electron transfer are still lacking, especially under large-sized grains and their high loading. Here a rhodizonate organic salt pre-pillared by K-ions (K 2 C 6 O 6 ) is proposed as high-rate cathode for Li-salt mediated Mg batteries. Under a high loading of 70 wt%, well-crystallized K 2 C 6 O 6 composed of ultra-large micro-sized grains (up to 30 μm) shows a reversible capacity more than 300 mA h/g at 0.1 C (based on three electron transfer), and up to 200, 130 and 60 mA h/g at 2 C, 5 C and 10 C respectively. The high bulk electron/ion conductivity and low solubility are responsible for such a superior performance based on fast Li-K electrochemical exchange and highly reversible Li intercalation without the assistance of nano-sizing, as a consequence of optimization and stabilization of desired electron structure and open framework by K-ion pre-supporting (instead of Li/Na-pillaring) and Mg-ion trapping between C 6 O 6 2- layers. These large monoliths of K 2 C 6 O 6 do not undergo serious grain fracture after long-term cycling, and at that time the Mg anode still remains compact and dendrite-free.
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RSC Advances
·
2019
·Vol. 9
·期 29
·16288-16295
·
IF 3.049
Shu-ying Zhen,Hai-tao Wu,Yan Wang,Na Li,Hao-sen Chen,Wei-li Song,Zhen-hua Wang,Wang Sun,Ke-ning Sun
Herein, hollow porous CuO–CuCo2O4 dodecahedrons are synthesized by using a simple self-sacrificial metal–organic framework (MOF) template, which resulted in dodecahedron morphology with hierarchically porous architecture. When evaluated as a cathodic electrocatalyst in lithium–oxygen batteries, the CuO–CuCo2O4 composite exhibits a significantly enhanced electrochemical performance, delivering an initial capacity of 6844 mA h g−1 with a remarkably decreased discharge/charge overpotential to 1.15 V (vs. Li/Li+) at a current density of 100 mA g−1 and showing excellent cyclic stability up to 111 charge/discharge cycles under a cut-off capacity of 1000 mA h g−1 at 400 mA g−1. The outstanding electrochemical performance of CuO–CuCo2O4 composite can be owing to the intrinsic catalytic activity, unique porous structure and the presence of substantial electrocatalytic sites. The ex situ XRD and SEM are also carried out to reveal the charge/discharge behavior and demonstrate the excellent reversibility of the CuO–CuCo2O4 based electrode.
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高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Shili Wang,Shimou Chen,Weiqun Gao,Lili Liu,Suojiang Zhang
In this paper, we propose a new electrolyte additive 3-Isocyanatopropyltriethoxysilane (IPTS) to improve the cycle stability and rate performance of Ni-Rich (LiNi 0·6 Co 0·2 Mn 0·2 O 2 ) cathode half-cell. Density function theory calculations suggest that IPTS has higher HOMO energy than solvent, which can decompose preferentially. Moreover, we confirm the oxidative decomposition by the linear scanning cyclic voltammetry , which can achieve stable at a cutoff voltage of 2.5–4.5 Vs. (Li/Li + ). The cyclic voltammetry curves at different scan rates indicate that the migration rate of lithium ions is higher in the cells with 0.5% additive than in the base electrolyte. After 150 cycles, the capacity retention rates in the base electrolyte and in the additive-containing electrolyte are 55.4% and 73.1%, respectively. X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy show that the additive is involved in film formation, and the obtained CEI film is very uniform and dense, which play a key role in stabilizing the electrolyte under high voltage.
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高影响因子
ChemSusChem
·
2019
·Vol. 12
·期 14
·3377-3382
·
IF 7.804
Rusheng Fu,Yongkang Wu,Chongzhao Fan,Zuxin Long,Guangjie Shao,Zhaoping Liu
Graphical Breaking the ICE : The SiO anode in Li-ion batteries has low initial coulombic efficiency (ICE) because of the irreversible formation of Li 2 O and lithium silicates. Sn-mixed SiO shows great promise to address these issues by reactivating Li 2 O, in the inverse reaction to that occurring at the metal oxide anodes. Sn is shown to form an outstanding conductive phase, which boosts the reaction kinetics and also reactivates Li 2 O. The application of SiO anodes in Li-ion batteries is greatly restricted by its low initial coulombic efficiency (ICE). Usually, a pre-lithiation procedure is necessary to improve the ICE, but the available technologies are associated with safety issues. Metal (M)-mixed SiO shows great promise to address these issues by reactivating Li 2 O through the reaction M+Li 2 O→MO x +Li + , which is the inverse reaction to that occurring at MO x anodes. Sn is found to be a good choice of metal for this concept. Nanoscale Sn-mixed SiO composites are prepared by mechanical milling. Sn forms an outstanding conductive phase, which boosts the reaction kinetics and also reactivates the Li 2 O byproduct. Sn/SiO (1:2 w/w) delivers a significant improvement in ICE from 66.5 % to 85.5 %. A higher ICE value of >90 % is obtained when the Sn content is ≥50 wt %. However, additional electrolyte decomposition occurs, which is catalyzed by Sn. In addition, coarsening of the nano-Sn material reduces the inverse conversion reactivity of Sn/Li 2 O and subsequently results in rapid capacity fading. The quantitative analysis indicates that, in contrast to transition metals, the alloying and dealloying nature of Sn gives a 50 % improvement in reversible capacity, attributed to Sn/Li 2 O. This work gives a general strategy to choose metals for increasing the ICE of SiO x and metal oxides.
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高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 8
·期 1
·259-267
·
IF 10.733
Congcong Dang,Yu Wang,Biao He,Weibin Zhang,Feng Dang,Hongchao Wang,Yong Du
Searching for highly efficient and low cost electrocatalysts is an urgent challenge to provide high capacity and long cycle life Li–O2 batteries (LOBs). In this work, the highly efficient electrocatalytic properties of MoSi2 were first demonstrated using particles prepared by a solid–state reaction method. The surface was activated, playing a dominant role in the electrocatalytic performance. After acid etching to remove SiO2 impurities arising from the surface oxidation, MoSi2 exhibited excellent bifunctional electrocatalytic properties for LOBs. Mo6+ on the surface contributed to the initial low overpotentials of 0.45 V (3.2 V for the OER and 2.75 V for the ORR) and transformed into Mo4+ for a long cycle life. As a consequence, outstanding rate capabilities of 12 708 mA h g−1 at 100 mA g−1 and 10 794 mA h g−1 at 800 mA g−1, and excellent cycle durability of 215 and 90 cycles at a limited capacity of 1000 mA h g−1 at 200 and 500 mA g−1, respectively, were obtained for the MoSi2 cathode.
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高影响因子
ACS Nano
·
2018
·
IF 13.709
Jing Tian,Dunping Cao,Xuejun Zhou,Jiulin Hu,Minsong Huang,Chilin Li
A magnesium battery is a promising candidate for large-scale transportation and stationary energy storage due to the security, low cost, abundance, and high volumetric energy density of a Mg anode. But there are still some obstacles retarding the wide application of Mg batteries, including poor kinetics of Mg-ion transport in lattices and low theoretical capacity in inorganic frameworks. A Mg–Li dual-salt electrolyte enables kinetic activation by dominant intercalation of Li-ions instead of Mg-ions in cathode lattices without the compromise of a stable Mg anode process. Here we propose a Mg–organic battery based on a renewable rhodizonate salt (e.g., Na2C6O6) activated by a Mg–Li dual-salt electrolyte. The nanostructured organic system can achieve a high reversible capacity of 350–400 mAh/g due to the existence of high-density carbonyl groups (C═O) as redox sites. Nanocrystalline Na2C6O6 wired by reduced graphene oxide enables a high-rate performance of 200 and 175 mAh/g at 2.5 (5 C) and 5 A/g (10 C), respectively, which also benefits from a high intrinsic diffusion coefficient (10–12–10–11 cm2/s) and pesudocapacitance contribution (>60%) of Na2C6O6 for Li–Mg co-intercalation. The suppressed exfoliation of C6O6 layers by a firmer non-Li pinning via Na–O–C or Mg–O–C and a dendrite-resistive Mg anode lead to a long-term cycling for at least 600 cycles. Such an extraordinary capacity/rate performance endows the Mg–Na2C6O6 system with high energy and power densities up to 525 Wh/kg and 4490 W/kg (based on active cathode material), respectively, exceeding the level of high-voltage insertion cathodes with typical inorganic structures.
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高影响因子
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