JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Jie Li,Xingxing Zhao,Zhian Zhang,Yanqing Lai
A hollow carbonized polyaniline spheres/selenium (HCPS/Se) composite was prepared by a simple combination method of a self-assembly method, pyrolysis and vapor phase infusion process as a cathode material for Li–Se rechargeable batteries. The composites were characterized and examined by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, the X-ray photoelectron spectroscopy and electrochemical methods, such as cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge/discharge tests. The HCPS/Se composite cathode can deliver relative high capacity, high Coulombic efficiency and good cycling performance. The electrochemical results show that the HCPS/Se composite cathode exhibits an initial discharge specific capacity of 571.5 mA h g −1 and retains 298.7 mA h g −1 with high Coulombic efficiency after 100 cycles at a high rate of 0.5 C (337.5 mA h g −1 ), which are higher than that of the pristine selenium cathode. The excellent electrochemical properties benefit from the high conductivity and the hollow structures of the carbonized polyaniline spheres.
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 SOLID STATE ELECTROCHEMISTRY
·
2013
·Vol. 17
·期 11
·2959-2965
·
IF 2.279
Li Qiang,Zhang Zhian,Zhang Kai,Xu Lei,Fang Jing,Lai Yanqing,Li Jie
Titania–sulfur (TiO 2 –S) composite cathode materials were synthesized for lithium–sulfur batteries. The composites were characterized and examined by X-ray diffraction, nitrogen adsorption/desorption measurements, scanning electron microscopy, and electrochemical methods, such as cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge–discharge tests. It is found that the mesoporous TiO 2 and sulfur particles are uniformly distributed in the composite after a melt-diffusion process. When evaluating the electrochemical properties of as-prepared TiO 2 –S composite as cathode materials in lithium–sulfur batteries, it exhibits much improved cyclical stability and high rate performance. The results showed that an initial discharge specific capacity of 1,460 mAh/g at 0.2 C and capacity retention ratio of 46.6 % over 100 cycles of composite cathode, which are higher than that of pristine sulfur. The improvements of electrochemical performances were due to the good dispersion of sulfur in the pores of TiO 2 particles and the excellent adsorbing effect on polysulfides of TiO 2 .
研究领域:
无机化学
·
能源材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2017
·Vol. 4
·期 10
·2709-2716
·
IF 4.136
Zhengbao Zhu,Zhongpei Lu,Jingjing Ding,Gang Yang,Weili Li,Hongmei Ji
Graphical Positive addition : A novel ionized oligomer that is synthesized by neutralizing acrylic-grafted epoxy resin with lithium hydroxide is introduced with PVdF as an additive to form a blending adhesive. The morphology, physical, and electrochemical properties of the composite electrodes are tested and discussed in detail. In this paper, a novel adhesive prepared by blending lithium-ion functionalized epoxy resin (ionized oligomer) with poly(vinylidenedifluoride) (PVdF) is used to fabricate the cathode electrode of LiCoO 2 . The properties of the blending adhesive are studied by Fourier transform infrared spectroscopy, differential scanning calorimeter, and thermogravimetric analysis, and the morphology and performance of the composite cathodes are characterized by using X-ray photoelectron spectroscopy (XPS), scanning and transmission electron microscopy, electrochemical impedance spectroscopy, and galvanostatic charge-discharge. With the blended ionized oligomer, the crystallinity behavior of PVdF is decreased effectively, which will be beneficial to the movement of conducting ions. An appropriate amount of ionized oligomer effectively improves the conductivity and charge-transfer capability of the cathode material. When the amount of ionized oligomer to the PVdF binder is 10 wt%, the LiCoO 2 -based composite cathode delivers the highest charge−discharge capacity (178 mAh g −1 ) and the capacity retention is up to 82.2 % after 100 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Sheng Yan,Jun Wu,Yang Dai,Zhijie Pan,Weiqin Sheng,Junming Xu,Kaixin Song
In order to avoid more release of polysulfides into electrolyte, a biomass porous carbon (PC) derived from nodus nelumbinis rhizomatis (NNR) and a network of nickel nitrate hydroxide (Ni 3 (NO 3 ) 2 (OH) 4 , NNH) were firstly utilized as a composite cathode for lithium-sulfur (Li-S) batteries. The NNH/PC/S composite prepared by a mesh-like NNH layer coating in situ on the surface of porous carbon/sulfur composite exhibits an excellent electrochemical performance. The discharge specific capacity is up to 1203.5 mA h g −1 for the initial cycle at 0. 5 C and maintains 521.3 mA h g −1 after 700 cycles. As the current rate is as high as 5 C, the battery with NNH/PC/S cathode still guarantees a sufficient output in specific capacity of 583.9 mA h g −1 . Besides the better conductivity and the accommodation for sulfur from the NNR-derived porous carbon, the coating of the mesh-like NNH layer also plays a critical role in improving the cycling properties by providing a strong adsorption by Ni-S bond and more active sites for redox reactions, and thus suppressing the dissolution of polysulfides .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2017
·
IF 2.354
Ru-Jun Chen,Yi-Bo Zhang,Ting Liu,Bingqing Xu,Yang Shen,Liangliang Li,Yuan-Hua Lin,Ce-Wen Nan
A simple way to assemble an all-solid-state lithium-ion battery with ultrahigh surface capacity and energy density was established. Polyethylene oxide-based solid-state electrolyte was prepared via solution method and nano-SiO 2 was added into the electrolyte to increase the conductivity. Thick compact LiFePO 4 pellet infused with dry polymer electrolyte was used as the composite cathode in the all-solid-state lithium battery . The compact composite cathode not only showed large ionic and electronic conductivity , but also provided sufficient “free space” to compensate the volumetric change of the active materials during cycling. The all-solid-state lithium battery (composite cathode/dry polymer electrolyte/Li) was cycled at a constant current density of 200 μA/cm 2 at 60 °C. A maximum discharge specific capacity of 157 mAh/g was achieved and the surface capacity reached 15 mAh/cm 2 , which was of critical significance for all-solid-state lithium batteries. Good capacity retention was achieved after 10 cycles and great rate performance was obtained. Even at a current density of 1000 μA/cm 2 , the battery delivered a specific discharge capacity of 71 mAh/g, corresponding to a surface capacity of 6 mAh/cm 2 . The experimental data demonstrated that the composite cathode was a promising design in high-performance bulk-type all-solid-state lithium batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Bowei Cao,Yuli Huang,Yuan Liu,Yang Yang,Xilin Xu,Quan Li,Zhen Geng,Xiqian Yu,Hong Li
Solid polymer electrolytes (SPEs) are promising candidates for the application of solid-state batteries (SSBs). However, the narrow electrochemical window and inadequate electrode-electrolyte interfacial contact restrict the practical application of SPEs. To address these issues, the solid composite cathode electrode (SCCE) is designed through in-situ polymerization in the LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode electrode. The in-situ polymerized electrolyte exhibits high ionic conductivity (0.133 mS cm −1 at 30 °C and 1.1 mS cm −1 at 60 °C) and a wide electrochemical window (>4.8 V). The poly (ethylene oxide) (PEO) based SSB using the constructed NCM811-SCCE shows superior cycling stability with a capacity retention ratio of 74.14 % after 500 cycles (2.8–4.2 V). Moreover, the PEO solid-state pouch cell employing the NCM811-SCCE can operate under bending or cutting conditions, demonstrating its high safety and reliability. Therefore, this work presents an effective design of SCCE, enabling the PEO-based SSB to be compatible with the high-voltage cathode. This is a practical approach for the applications of SSBs with high energy density and safety.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 31
·期 13
·2008487
·
IF 16.836
Hao Li,Fang Lian,Nan Meng,Chenyu Xiong,Nan Wu,Biyi Xu,Yutao Li
Solid–solid interfaces in the composite cathode for solid-state batteries face the thorny issues of poor physical contact, chemical side reaction, temporal separation, and sluggish Li + /e − transfer. Developing key material to achieve the composite cathode with efficient solid–solid interfaces is critical to improving the coulombic efficiency, cycling life, and energy density of solid-state batteries. Herein, electronic and ionic dual conductive polymer (DCP) is prepared for the composite cathode via intermolecular interaction on the base of lithiated polyvinyl formal-derived Li + single-ion conductor (LiPVFM), lithium difluoro(oxalato)borate (LiODFB), and electronic conducting polymer. Crosslinking, coordination, and hydrogen-bonding effect enable DCP with high electrical conductivity of 68.9 S cm −1 , Li + ionic conductivity (2.76 × 10 −4 S cm −1 ), large electrochemical window above 6 V and a high modulus of 6.8 GPa. Besides, DCP can form a coating layer on the active material powders to maintain structural integrity via buffering the internal stress during lithiation/delithiation, meanwhile, to construct long- and short-range electronic/ionic conductive channel together with a small amount of CNTs. Rigid and flexible DCP-based composite cathode enables the excellent cycling of solid-state batteries with a high loading up to 11.7 mg cm −2 and high content of active materials close to 90 wt% without current collector.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 35
·2204633
·
IF 17.521
Ruonan Xu,Jingming Yao,Ziqi Zhang,Lin Li,Zhenyu Wang,Dawei Song,Xinlin Yan,Chuang Yu,Long Zhang
A viscous feature is beneficial for a solid electrolyte with respect to assembling solid-state batteries, which can change the solid-solid contacts from point to face. Here, novel halide-based deep eutectic solid electrolytes (DESEs) prepared by a facile ball milling method is reported. The mixture of halides triggers the deep eutectic phenomena by intermolecular interactions, leading to diverse morphologies and viscous statuses in terms of composition. Chemical- and micro-structure analyses via the cryogenic technique reveal that the LiCl and LiF nanoparticles are dispersed in an amorphous halide matrix, which endow freely mobile ions for fast ion transport. The optimized DESE thus achieves low activation energy and high ionic conductivity of 16 mS cm −1 at room temperature, one of the highest values among various electrolytes so far. By integrating with the active materials to form a composite cathode, the viscous DESE yields a super-dense composite pellet which possesses intensively enhanced ionic conductivity in contrast to those formed by the sulfide-based electrolyte additives, demonstrating an attractive application prospect.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2024
·Vol. 30
·期 8
·4479-4486
·
IF 2.4
Tang Anping,Chen Juedong,Xu Guorong,Song Haishen,Wang Jinglun,Chen Hezhang
Non-intercalation cathode materials based on nanocomposites of lithium fluoride and Li-free transition metal compounds have drawn attention as materials for fabricating the cathode of lithium ion batteries owing to their high theoretical specific capacities and high redox voltages. In the present study, a nanocomposite of MnO-LiF was in situ synthesized by a quick annealing at 500 °C for just 5 min using a mixture of ammonium fluoride, manganese acetate, and lithium acetate as precursor. The synthesized composite is investigated by X-ray diffraction, scanning electron microscopy, nitrogen sorption, and charge-discharge measurements. As a lithium-ion battery cathode, it delivers respectively an initial discharge-specific capacity of 170 mAh g −1 and a discharge-specific capacity of 137 mAh g −1 in the 50th cycle at a current rate of C/20, which is equivalent to a moderate capacity retention rate of 80.6%. The novel synthesis approach proposed offers access to electrochemically active composites of lithium fluoride and Li-free transition metal oxides.
研究领域:
材料科学
·
电化学
·
纳米复合材料
·
能源存储
·
锂离子电池
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Guiyan Sun,Shaobo Lai,Xiangbang Kong,Zhiqiang Chen,Kun Li,Rong Zhou,Jing Wang,Jinbao Zhao
A blend cathode has been prepared by mixing both LiNi0.5Co0.2Mn0.3O2 (NCM523) of high energy density and high specific capacity and LiFe0.15Mn0.85PO4/C (LFMP/C) of excellent thermal stability via a low-speed ball-milling method. The lithium ion batteries using the blend cathode with LFMP/C of optimum percent exhibit better capacity retention after 100 cycles than those using only single NCM523 or LFMP/C. Both theoretical simulation and experimental rate performances demonstrate that the electrochemical property of blend cathode materials is predictable and economical. In addition, the thermal behaviors of blend cathodes are studied by using differential scanning calorimetry analysis. The thermal stability of blend cathode materials behaves better than that of the bare NCM523 accompanied with an electrolyte. It is found that the outstanding rate and thermal performance of the blend cathode is due to the prominent synergistic effect between NCM523 and LFMP/C, and 10% LFMP/C in the blend cathode materials is the most adaptable as considering both electrochemical and thermal properties simultaneously.
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
固态化学
·
热分析
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Jiayi Zheng,Xieyu Xu,Jie Zhao,Xia Ma,Hui Wang,Kai Xie,Yu Han,Shizhao Xiong,Yuxiao Lin,Chunman Zheng,Qingpeng Guo
Solid-solid interfaces in the composite nickel-rich layered oxide LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode for solid-state lithium-metal batteries face the thorny issues of macroscopic contact interface, significant side reaction, intergranular cracking and sluggish Li + /e − transfer. To avoid such problems, we designed a high ionic/electronic dual-conducting soft gel coating on NCM811 cathode particles through the high-temperature semi-cyclized polyacrylonitrile strategy, aiming to build an unobstructed channel for enhanced transport kinetics in solid composite cathode. Additionally, an inner electrochemically stable interface layer is constructed between the coating layer and cathode particles vialing in situ electrochemical conversion. Thus, the coating layers with specific properties can maintain structural integrity of NCM811 cathode via buffering the internal stress during lithiation/delithiation and endows the solid-state battery with low interfacial resistance, outstanding cycling stability and thermal safety stability. Notably, this facile and scalable surface engineering provides a novel solution for the application of high nickel cathode materials in solid-state batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Xichao Li,Lili Zheng,Zhao Zang,Tao Liu,Fengting Cao,Xiaolin Sun,Shimei Sun,Quanhai Niu,Yuxiang Lu,Takeo Ohsaka,Jianfei Wu
The multiply depolarized composite cathode consisted of Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 (LMNCO) and a combinatory conductive network of graphene (GN) + carbon nanotubes (CNTs) in the active material and GN coating at the interface of current collector is synthesized via pasting LMNCO/GN/CNTs composite slurry on GN coated Al foil. The interlaced GN + CNTs conductive network improves both the electronic conductivity and Li ion transport and stabilizes the structure of composite. The GN coating at the interface of current/active materials interlaces with GN + CNTs in the active materials and improves the adhesion and reduces the resistance between the active material and current collector. Consequently, the LMNCO composite cathode exhibits superior rate capacities of 132 mAh g −1 at 5C and 97 mAh g −1 at 10C, high cycling capacity retentions of 86% at 1C and 85% at 2C after 100 cycles, respectively and lower voltage fading. This combinatory conductive network is much more efficient for reducing the resistance and polarization of electrode than any single conductive network of GN + CNTs, CNTs, GN or GN coating.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）