CHEMICAL ENGINEERING JOURNAL
·
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
TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY
·
2020
·
IF 1.05
Hongjun Chen,Chunhu Yu,Zeyang Xue,Pengxiang Wang,Zi Wang,Qianmin Cong,Lizhai Pei,Chuangang Fan
Lithium-doped bismuth oxide nanoplates with the thickness of 50–150 nm and tetragonal bismuth oxide, monoclinic lithium bismuthate phases have been synthesized via a simple hydrothermal process using lithium acetate and sodium bismuthate as the raw materials. Cobalt nanoparticles modified lithium-doped bismuth oxide nanoplates hybrids were obtained by an in situ photo-deposition route. The cobalt nanoparticles-modified nanoplates hybrids display significantly enhanced photocatalytic activity toward gentian violet compared with the nanoplates. Gentian violet solution can be totally degraded by the hybrids within 60 min under ultraviolet–visible light irradiation. The superior photocatalytic activity of the cobalt nanoparticles modified nanoplates hybrids originates from the superior charge transfer capacity and the energy band structure of the hybrids. The excellent photocatalytic performance makes the cobalt nanoparticles modified nanoplates hybrids a promising candidate as the photocatalyst for wastewater treatment.
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高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Mingjie Sun,Shuai Guo,Ziling Wang,Lu Zou,Bo Chi,Jian Pu,Jian Li
It is crucial to design effective cathode catalysts for high performance of Li–O 2 batteries (LOBs). Herein, porous LaCo 0.6 Ni 0.4 O 3 nanofibers decorated with ultrafine Co 3 O 4 nanoparticles (Co 3 O 4 @LCN NFs) are designed and employed as cathode catalyst for LOBs. The X-ray photoelectron spectroscopy measurement results suggested that uniform dispreading of Co 3 O 4 nanoparticles on LCN NFs surface could largely increase the surface chemisorbed oxygen, resulting in enhanced catalytic activity. Furthermore, with the assistance of Co 3 O 4 nanoparticles, Co 3 O 4 @LCN NFs can significantly facilitate O 2 adsorption and diffusion, Li 2 O 2 nucleation/decomposition and the formation of tiny sheet-like Li 2 O 2 , thereby achieving a low charge overpotential. A high specific capacity of 11,288 mA h g −1 , a low charge voltage plateau of 3.72 V at first cycle and excellent cycle stability of 116 cycles at 1000 mA g −1 are obtained for LOBs with Co 3 O 4 @LCN NFs.
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高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Rui Wang,Jing Li,Ying Zhang,Pengyu Li,Jidong Duan,Manqin Tang,Chun Yuan
Li–S battery is considered as one of the most competitive energy storage devices mainly due to the high theoretical specific capacity and high specific energy. However, when facing with the practical application, some issues, especially poor electro-conductivity of element sulfur and severe polysulfides (LiPSs) migration, are still needed to solve to further improve the performance of the Li–S batteries. Aiming at the above two disadvantages, in this work, multifunctional separators are designed as efficient LiPSs absorber via coating vapor grown carbon fiber/MoS 2 (VGCF/MoS 2 ) composites on the polypropylene separator (PP) near the cathode side. For the as-prepared VGCF/MoS 2 coated polypropylene separator (VM/PP), MoS 2 could provide strong chemical adsorption for the LiPSs, while the VGCF framework could act as an electronic transmission channel for the conversion of LiPSs, and also provide physical adsorption for LiPSs at the same time. Benefit from these characteristics, the batteries with VM/PP exhibits a high initial capacity of 1208.7 mAh g −1 at 0.2C and maintains at 862.4 mAh g −1 after 200 cycles. Impressively, the VM/PP shows the high specific capacity of 904.3 mAh g −1 and long-lasting cycling stability with 0.03% capacity attenuation per cycle over 600 cycles at 1.0C, demonstrating excellent electrochemical performance.
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高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Xingzhen Huang,Kan Huang,Liken Chen,Nan Chen,Ruoshan Lei,Shilong Zhao,Shiqing Xu
The Y 2 Ti 2 O 7 : Er 3+ /Yb 3+ phosphors co-doped with Li + and Li + /Mg 2+ ions were prepared via solid state reaction method. The effects of Li + and Mg 2+ co-doping on the structure and morphology of Y 2 Ti 2 O 7 : Er 3+ /Yb 3+ phosphors were investigated by X-ray diffraction (XRD), electron paramagnetic resonance (EPR) spectra and field emission scanning electron microscopy (FESEM) observations. The 980 nm excitation assisted UC luminescence intensity for green and red band was enhanced by 8.7 and 14.3 times respectively after co-doping with Li + /Mg 2+ ions in Y 2 Ti 2 O 7 : Er 3+ /Yb 3+ , which could be explained based on the variations in crystal structure and particle size. Using the fluorescence intensity ratio (FIR) technique, the impact of 980 nm pump power on the thermometric behaviors was studied based on the thermally coupled levels of 2 H 11/2 and 4 S 3/2 of Er 3+ ions. Due to the unique thermal properties of the Y 2 Ti 2 O 7 host, the temperature increment caused by laser thermal effect was minimized, benefiting the consistency of FIR data over a wide range of pump power density. Besides, a high relative sensor sensitivity of 1.17%K −1 was obtained for Y 2 Ti 2 O 7 : Er 3+ /Yb 3+ /Li + /Mg 2+ phosphors. These characteristics may make the studied system applicable for optical temperature sensor with high accuracy.
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Advanced Energy Materials
·
2020
·Vol. 10
·期 38
·2001592
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IF 25.245
Xiaodong Lin,Zongqiang Sun,Chun Tang,Yuhao Hong,Pan Xu,Xueyang Cui,Ruming Yuan,Zhiyou Zhou,Mingsen Zheng,Quanfeng Dong
The reduction of O 2 to solid Li 2 O 2 on discharge and the reverse oxidation of Li 2 O 2 to O 2 on recharge are the essential processes to determine the performance of Li-O 2 batteries. The discovery of effective catalysts with a favorable Li 2 O 2 formation/decomposition mechanism is vital for the development of high-performance Li-O 2 batteries. Here, a soluble catalyst of iodosylbenzene (PhIO) that can offer a highly reversible O 2 conversion is reported for the first time. Benefiting from its ability to capture and couple the LiO 2 intermediate, which is endowed by its polarized I 3+ O 2− bond where the I atom and O atom can serve as a Lewis acidic site and basic site (dual site) to interact with O 2 − and Li + , respectively, the formation and decomposition of Li 2 O 2 by a one-electron pathway can be effectively promoted, thus greatly improving the electrode surface passivation issue and the reaction kinetics. In addition, the side reactions caused by the traditional high-reactive LiO 2 intermediate can also be effectively suppressed by forming a series of low-reactive intermediates (LiO 2 3PhIO, (LiO 2 ) 2 4PhIO, and Li 2 O 2 4PhIO) instead. Consequently, the PhIO-catalyzed Li–O 2 batteries exhibit a low overpotential, a large capacity, and a good cyclability.
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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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Journal of Materiomics
·
2022
·
IF 8.589
Lei Wei,Zhaoqing Jin,Jianhao Lu,Yang Guo,Zilong Wang,Gaoping Cao,Jingyi Qiu,Anbang Wang,Weikun Wang
Lithium (Li) metal anode holds great promise for high-energy-density rechargeable batteries. However, it suffers from the Li dendrites growth and uncontrollable side reactions with electrolyte due to the unstable solid electrolyte interphase (SEI) layer. Herein, we propose a facile strategy for the in-situ fabricate of organic-inorganic composite artificial SEI layers on Li surfaces, which consist of organic fluorinated siloxane and inorganic LiF-rich phases. The hybrid artificial SEI endows high mechanical strength (13.1 GPa) and Li + transfer number (0.62). Such robust SEI protective layers can not only guide uniform nucleation and deposition of Li metal by facilitating uniform Li-ion distribution, but also prevent unfavourable side reactions. Accordingly, the protected metallic lithium anode (PMTFPS-Li) anode enables stable Li plating/stripping performance in symmetric cells for more than 300 h at 4 mA ·h/cm 2 under a high areal capacity of 4 mA/cm 2 . Moreover, the PMTFPS-Li/S cells could maintain more than 300 stable cycles at 0.5C and the PMTFPS-Li/LFP cells present excellent cycling performance (400 cycles at 1C) and enhanced rate capability (110.4 mA·h/g at 3 C). This work will inspire the design of artificial SEI on Li anodes for advanced Li metal batteries.
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Small
·
2023
·
IF 13.3
Wencan Ma,Haomin Wu,Teng Long,Yifeng Cai,Zhiao Yu,Caixia Liu,Guigan Fang,Qiuhong Zhang,Xudong Jia
Silicon is regarded as the most promising candidate due to its ultrahigh theoretical energy density (4200 mAh g −1 ). However, the large volume expansion of silicon nanoparticles would result in the destruction of electrodes and a shortened cycle lifetime. Here, inspired by the natural structure of bamboo, the silicon anode with vascular bundle-like structure is proposed to improve the electrochemical performance for the first time. The dense channel wall in the silicon anode can accommodate the volume change of silicon nanoparticles and the transport of ions and electrons is also enhanced. The obtained silicon anodes display excellent mechanical properties (50% compression resilience and the average peel force of 4.34 N) and good wettability. What more, the silicon anodes exhibit high initial coulombic efficiency (94.5%), excellent cycle stability (2100 mAh g −1 after 300 cycles) which stands out among the silicon anodes. Specially, the silicon anode with impressive areal capacity of 36.36 mAh cm −2 and initial coulombic efficiency of 84% is also achieved. This work offers a novel and efficient strategy for the preparation of the flexible electrodes with outstanding performance.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yuzhi Chen,Boliang Ma,Qingchuan Wang,Limin Liu,Luyao Wang,Shujiang Ding,Wei Yu
Li||LiFePO 4 (LFP) batteries have good stability and high energy density . However, they exhibit unsatisfactory low-temperature electrochemical performance . Due to the fragile interfacial passivation layers and sluggish kinetics, commercial electrolytes fail to simultaneously achieve acceptable stabilization with dual electrodes in low-temperature Li||LFP batteries. Herein, a novel localized high-concentration electrolyte (LHCE) with great dual-electrodes compatibility is proposed to match with the low-temperature Li||LFP batteries. With increasing local concentration, the FSI - sequentially replaces the solvent molecules and enters the first solvation sheath, forming the anion-dominated solvation structures. This effectively suppresses free solvents decomposition and constructs the anion-derived passivation layers with inorganic-rich components, further contributing to the rapid transport kinetics and endowing the LHCE with great dual electrodes compatibility. These dual-electrodes co-stabilization effects of the LHCE are originally clarified in the low-temperature Li||LFP batteries. The designed LHCE also delivers low freezing point (-99.8 ℃), high ionic conductivity (2.4 mS cm −1 at −40 ℃), and superior stability (>4.7 V vs. Li/Li + ). Hence, the Li||LFP batteries with LHCE possess superb cyclic stability at low temperatures, delivering a high discharge capacity of 120 mAh g −1 over 300 cycles at −20 ℃. Moreover, compared to commercial electrolytes, LHCE endows the Li||LFP batteries with superior low-temperature performances under practical conditions, including limited Li anode (3 mAh cm −2 ) and a wide temperature range (30 ℃ to −40 ℃).
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Daming Yang,Guiru Sun,Xinru Wang,Fengyang Li,Ze Gao,Pingli Zhang,Wei Lu,Ming Feng
The photo-assisted lithium-oxygen (Li-O 2 ) cell is widely concerned due to its low overpotential. However, rapid recombination rate of photogenerated electrons and holes remains a fundamental challenge for photo-assisted Li-O 2 cells. Herein, we design an optical and magnetic fields co-assisted Li-O 2 cell based on α-Fe 2 O 3 nanospindles. We employed PL spectrum and I-t curve confirm that under the magnetic field, the photogenerated electrons and holes are driven via the opposite Lorentz forces in photo-assisted Li-O 2 cells, which is beneficial to accelerating the formation and decomposition of Li 2 O 2 . The optical and magnetic fields co-assisted Li-O 2 cell based on α-Fe 2 O 3 nanospindles achieves an ultra-high discharge platform of 3.47 V and a low charge platform of 3.57 V, as well as a surprising energy efficiency of 97.2%. In addition, the optical and magnetic fields co-assisted Li-O 2 cell can stably cycle for over 25 cycles. This study offers a reference for improving the electrochemical kinetics of photo-assisted Li-O 2 cell by introducing magnetic field, which opens up a new avenue for the development of high-performance Li-O 2 cells.
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高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Yiqing Lu,Zhimin Zou,Yu Bai,Xin Wang,Hongwang Zhang,Chunhai Jiang
Commercialization of SiO/graphite (SiO/G) composite anode material has been partially conducted in modern-model Li-ion batteries but is still limited by its relatively high cost and inferior stability. Improving the Li-ion storage performance as well as lowering the manufacturing cost of SiO/G anode has been the ongoing target of many studies. Herein, a low cost SiO/G anode with good Li-ion storage performance is developed by facilely integrating SiO nanoparticles into spent graphite (SG) extracted from used LiFePO 4 batteries. The loose SG particles after repeated charge/discharge cycles can be easily exfoliated and combined with the SiO nanoparticles during the mechanical ball-milling treatment. Further processing the composite into spherical structure by spray-drying and pyrolysis results in practically applicable anode materials. The SiO/SG/C anode with a SiO mass ratio of 30 % exhibits the best overall performance including an excellent rate capability (385 mAh g −1 at 3 A g −1 ) and encouraging cycle stability (442 mAh g −1 after 300 cycles at 1 A g −1 ). The coin-type full cells coupling the pre-lithiated spherical SiO/SG anode and NCM811 cathode delivers a high energy density of 461 Wh kg −1 (based on the active masses of both electrodes) and good cycle performance (74.4 % capacity retention at 0.5C after 100 cycles). This work not only provides a high performance yet low cost SiO/G anode material, but explores a high value added way for the reuse of SG, thus can practically push forward the development of LIBs .
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危险品化学品经营许可证（带存储）