|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | A novel synthesis strategy to improve cycle stability of LiNio.8Mno.1Co0.1O2 at high cut-off voltages through core-shell structuring显示文摘Nickel-rich cathode materials have attracted considerable interest because of their high specific capacities,voltage ranges,and low cost.However,serious capacity attenuation and poor rate performance limit their application.This study proposes a novel strategy to improve the cycle stability of the nickel-rich LiNi0.sCo0.1Mn0.1O2(NCM811)layer material by designing core-shell LiNio.sCoo.1 Mno.102(CS-NCM811).CS-NCM811 is designed by the characteristic reaction between dimethylglyoxime(C4H8N2O2)and nickel ion to form Ni(C4H7N2O2)2-The CS-NCM811 is characterized with high nickel content in its core and high manganese content on its surface,leading to a high capacity and excellent cycle stability.The capacity retention of CS-NCM811 was 72.8%,much higher than that of NCM811(47.1%)after 500 cycles at a rate of 5 C.Not only is this method a no vel strategy to desig n high capacity cathode materials but also provides some new in sights into the cycle stability of nickel-rich layered cathode materials. | Kang Wu Qi Li Rongbin Dang Xin Deng Minmin Chen Yu Lin Lee Xiaoling Xiao Zhongbo Hu | 2019 | Nano Research2019，12，10： | 12 |
| 2 | Electrochemical performance of Li-rich cathode material,0.3Li_2MnO_3-0.7LiMn_(1/3)Ni_(1/3)Co_(1/3)O_2 microspheres with F-doping显示文摘Layered F-doped cathode materials 0.3 Li_2 MnO_3-0.7 LiMn_(1/3)Ni_(1/3)CO_(1/3))O_(2-x)F_x(x = 0, 0.01, 0.02, 0.03, 0.04,0.05) microspheres made up of nanosized primary grains were prepared through co-precipitation method. The sample of x = 0.02 demonstrates a large discharge capacity of226 mAh g^(-1) over 100 cycles at 0.1 C and excellent rate performance with discharge capacity of 96 mAh g-1 at 5.0 C and room temperature. Particularly, this material shows much enhanced electrochemical performances even at high temperature of 55 ℃. It delivers a quite high discharge capacity of 233.7 mAh·g^(-1) at 1.0 C with capacity retention as high as 97.9% after 100 cycles. The results demonstrate that the fluorine incorporation stabilizes the cathode structure and maintains stable interfacial resistances. | Ting Liu Shi-Xi Zhao Lu-Lu Gou Xia Wu Ce-Wen Nan | 2019 | Rare Metals2019，38，3： | 11 |
| 3 | Spinel Phases LiRE_xMn_(2-x)O_4(RE=Nd, Ce) as Cathode for Rechargeable Lithium Batteries显示文摘Several series of LiRE x Mn 2-x O 4(RE=Ce, Nd) samples prepared at different contents and in different rare earth metals substitution were studied in order to further understand the dependence of the electrochemical performance on the doping rare earth metals. These cathodes were more tolerant to repeat lithium extraction and insertion than a standard LiMn 2O 4 spinel electrode in spite of a small reduction in the initial capacity. X ray photoelectron spectroscopy results show that the Mn 4+ contents for spinel LiMn 2O 4 directly affected the initial capacity and cyclability of LiMn 2O 4. | 彭正顺 江泱 金增媛 | 2000 | Journal of Rare Earths2000，18，2： | 5 |
| 4 | Electrical Properties and Microwave Synthesis of Mixed Rare Earth Oxide Ln_(0.7)Sr_(0.3-x)Ca_xCo_(0.9)Fe_(0.1)O_(3-δ)显示文摘In order to lower the raw materials cost and develop a novel cathode materials for intermediate temperature solid oxide fuel cell(ITSOFC), using mixed rare earth replacing the expensive pure La2O3 as the raw materials, the powders of Ln0.7Sr0.3-xCaxCo0.9Fe0.1O3-δ (Ln=the mixed rare earth, x=0.05, 0.10, 0.15) for the applications as the cathode materials were prepared by microwave sintering process. The crystal structure and the particles morphology of the obtained powders were characterized by XRD and SEM, the electrical conductivity of all samples sintered at 1200 ℃ for 3 h was also measured as the function of the temperature from 100 to 800 ℃ by DC four-probe method in air. The experimental results show that due to the influence of mixed rare earth the powders of Ln0.7Sr0.3-xCaxCo0.9Fe0.1O3-δ synthesized at 1200 ℃ for 0.5 h with the mean particle size of 1~20 μm was of perovskite and cubic fluorite phase as well a little SrO phase, the electrical conductivity of the samples decreases with the adding Ca2+ content, and are all higher than 100 S·cm-1 from 500 to 700 ℃ when x≤0.10. Ln0.7Sr0.3-xCaxCo0.9Fe0.1O3-δ. Can meet the demand of the electrical properties for the cathode materials in ITSOFC. | 高文元 孙俊才 刘莎 刘扬 李长敏 唐乃岭 | 2006 | Journal of Rare Earths2006，24，z2： | 4 |
| 5 | 微波辅助回流法制备桑椹形Na_3V_2(PO_4)_2O_2F@C正极材料用于高性能钠/锂离子电池(英文)显示文摘本论文采用快速微波辅助低温回流策略制备了桑椹形Na_3V_2(PO_4)_2O_2F@C纳米复合材料.研究表明微乳液中的V(acac)_3反胶束体系对该自组装结构的形成起到了关键作用.制得的Na_3V_2(PO_4)_2O_2F晶粒沿着[002]方向生长并被原位包封在碳壳中,形成了高度稳定的自组装结构,这不仅有利于Na^+/e^-的快速迁移,而且能够有效改善电极材料的循环性能并抑制电压衰减.作为钠离子电池正极材料,在0.1 C条件下, Na_3V_2(PO_4)_2O_2F@C的初始放电容量约为127.9 mA h g^(-1).在高倍率(20 C)条件下,容量达88.1 mA h g^(-1), 2000次循环后容量保持率为82.1%.此外,利用非原位X射线衍射, X射线光电子能谱和恒电流间歇滴定技术,初步研究了Na_3V_2(PO4)_2O_2F@C在充放电过程中的反应机理和Na^+迁移机制.同时,在Li/Na离子混合电池当中, Na_3V_2(PO_4)_2O_2F@C也表现出了优异的倍率和循环性能.上述微波辅助低温回流合成策略为开发高性能电化学储能材料开辟了新的途径. | 侯燕 常焜 王振宇 顾帅 刘琼 张钧君 程化 张圣麟 常照荣 卢周广 | 2019 | Science China Materials2019，62，4： | 4 |
| 6 | Electrochemical performance of Al_2O_3 pre-coated spinel LiMn_2O_4显示文摘Al_2O_3-coated spinel LiMn_2O_4 cathode materials, presintered LiMn_2O_4(P-LMO), and calcined LiMn_2O_4(C-LMO) were synthesized by chemical deposition and thermal treating method using presintered and calcined LiMn_2O_4 as precursors. The crystal structure, morphology,the thickness of the coating layer, and particle size of prepared samples were investigated by X-ray diffraction(XRD), scanning electron microscopy(SEM), high-resolution transmission electron microscopy(HRTEM), and Malvern instruments. The average particle size of P-LMO with like-spheres(0.3 μm) is much smaller than that of C-LMO(0.5 μm). The Al_2O_3 layer of P-LMO can effectively reduce the charge transfer resistance and inhibit the Mn dissolution. The electrochemical performance of P-LMO is better than that of C-LMO. It is found that the LiMn_2O_4 cathode materials have excellent electrochemical cyclability by coated 2 mol% Al_2O_3 at the surface of presintered material. The initial discharge capacity of the material with 2 mol% Al_2O_3-coated is 114.0 m Ah·g^(-1) at 0.1 C rate and 55 ℃, and the capacity retention is 87.3 % at 0.5 C rate. | Hong-Ming Zhou Yu-Hua Zhu Jian Li Wen-Jiao Sun Zhong-Zhong Liu | 2019 | Rare Metals2019，38，2： | 3 |
| 7 | Organic 3D interconnected graphene aerogel as cathode materials for high-performance aqueous zinc ion battery显示文摘Aqueous rechargeable zinc ion batteries are very attractive in large-scale storage applications,because they have high safety,low cost and good durability.Nonetheless,their advancements are hindered by a dearth of positive host materials(cathode)due to sluggish diffusion of Zn2+in the solid inorganic frameworks.Here,we report a novel organic electrode material of poly 3,4,9,10-perylentetracarboxylic dianhydride(PPTCDA)/graphene aerogel(GA).The 3D interconnected porous architecture synthesized through a simple solvothermal reaction,where the PPTCDA is homogenously embedded in the GA nanosheets.The self-assembly of PPTCDA/GA coin-type cell will not only significantly improve the durability and extend lifetime of the devices,but also reduce the electronic waste and economic cost.The self-assembled structure does not require the auxiliary electrode and conductive agent to prepare the electrode material,which is a simple method for preparing the coin-type cell and a foundation for the next large-scale production.The PPTCDA/GA delivers a high capacity of≥200 m Ah g^–1 with the voltage of 0.0~1.5 V.After 300 cycles,the capacity retention rate still close to 100%.The discussion on the mechanism of Zn2+intercalation/deintercalation in the PPTCDA/GA electrode is explored by Fourier transform infrared spectrometer(FT-IR),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)characterizations.The morphology and structure of PPTCDA/GA are examined by scanning electron microscopy(SEM)and transmission electron microscopy(TEM). | Ruibai Cang Ke Ye Kai Zhu Jun Yan Jinling Yin Kui Cheng Guiling Wang Dianxue Cao | 2020 | Journal of Energy Chemistry2020，29，6： | 2 |
| 8 | Preparation of Li[Ni_(1/3)Co_(1/3)Mn_(1/3)]O_2 powders for cathode material in secondary battery by solid-state method显示文摘Employing Li2CO3, NiO, Co3O4, and MnCO3 powders as starting materials, Li[Ni1/3Co1/3Mn1/3]O2 was synthesized by solid-state reaction method. Various grinding aids were applied during milling in order to optimize the synthesis process. After successive heat treatments at 650 and 950 ℃, the prepared powders were characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy, and transmission electron microscopy. The powders prepared by adding salt (NaCl) as grinding aid exhibit a clear R3m layer structure. The powders by other grinding aids like heptane show some impurity peaks in the XRD pattern. The former powders show a uniform particle size distribution of less than 1 μm average size while the latter shows a wide distribution ranging from 1 to 10 μm. Energy dispersive X-ray (EDX) analysiss show that the ratio of Ni, Co, and Mn content in the powder is approximately 1/3, 1/3, and 1/3, respecively. The EDX data indicate no incorporation of sodium or chlorine into the powders. Charge-discharge tests gave an initial discharge capacity of 160 mAh·g-1 for the powders with NaCl addition while 70 mAh·g-1 for the powders with heptane. | PARK Sook Hee KANG Chan Hyoung | 2006 | Rare Metals2006，25，z2： | 1 |
| 9 | A new candidate as the cathode material for intermediate and low temperature SOFCs显示文摘In order to develop the new cathode materials suitable for intermediate and low temperature solid oxide fuel cells (IT/LTSOFCs), LaNi1-xFexO3 (x=0.4-0.8) (LNF) materials were synthesized using coprecipitation method. Their structures and morphologies were investigated by XRD and SEM, and their electronic conductivities at different temperatures were measured by dc four terminal method. Fuel cells were fabricated to evaluate the electrochemical properties of the LNF materials as cathodes at different temperatures. The performance of 450-497 mW·cm-2 was obtained in the temperature region of 580-650 ℃ for the LaNi0.2Fe0.8O3 cathode, and of 209-227 mW·cm-2 at 400-500 ℃ for the LaNi0.4Fe0.6O3. The excellent fuel cell performances indicate that the LNF materials are good cathodes for IT/LTSOFCs. | LI Song SUN Xueli WEN Zhongsheng SUN Juncai | 2006 | Rare Metals2006，25，z1： | 1 |
| 10 | Cathode Materials for Solid Oxide Fuel Cells(SOFC)显示文摘A detailed overview has been given concerning the use of rare earth materials in cathode fabrica-tion of solid oxide fuel cells(SOFC).It is focused on the various synthesis methods of the perovskite-typemixed rare earth oxides and the physical and chemical properties of the materials for cathode application ofSOFC.Also discussed is the doping mechanism of the related materials.Documented investigations showthat lanthanide of transition metals,especially manganese,chromium doped with strontium are most advan-tageous for the application.The crystallography,defect structure,conductivity and thermal matching withthe electrolyte and high temperature stability of cathode in oxidative gases are particularly emphasized. | 夏定国 魏秋明 朱时珍 刘庆国 | 1993 | Journal of Rare Earths1993，11，4： | 0 |
| 11 | Effect of Flow-rate Induced Cation Mixing and Particle Size Tuning on the Structure and Electrochemical Properties of LiNi0.8Co0.1Mn0.1O2 Synthesized by Spray Drying显示文摘Lithium ion battery cathode material LiNi0.8Co0.1Mn0.1O2(NCM811)was synthe-sized via a spray drying method.The effect of different spray drying flow-rates(200,250,300,and 400 mL·min^-1)on the structural and electrochemical properties of NCM811 are investigated.We find that the contents of Ni,Co,and Mn in the NCM811 cathode materials do not change significantly with the changing flow-rate,but the lattice parameter and morphology of the materials are significantly affected.Under the optimal spray drying flow-rate(250 mL·min^-1),the obtained NCM811 cathode(250NCM811)exhibits the best crystallinity,with the highest ratio of I(003)/I(104)in the XRD pattern.SEM images reveal the spherical morphology of 250NCM811 and the average diameter of about 5 mm.The results of electrochemical test show that the reversible capacity of 250NCM811 reaches 210 mA·g^-1 at 0.2 C(1 C=280 mA·g^-1).After 100 charge-discharge cycles at 1 C,the battery retains more than 94%of its initial capacity.Overall,spray drying flow-rate demonstrates great effect on the electrochemical properties of NCM811. | 林长新 张祥昕 刘永川 陈素晶 王维 张易宁 | 2020 | Chinese Journal of Structural Chemistry2020，39，1： | 0 |
| 12 | 可充电电池中具有空心结构的正极材料显示文摘随着可充电电池应用的广泛应用,人们对可充电电池的性能(质量比容量、倍率性能和循环稳定性)提出了更高的要求.设计合成具有微纳米结构的电极材料是提升可充电电池电学性能的一个重要研究方向,其中空心结构设计因其有效性引起研究人员的重视.目前空心结构的应用主要集中在负极材料上,相比之下具有空心结构的正极材料因其较难的形貌控制以及较低的体积比容量,研究相对较少.本文总结了具有空心结构的正极材料在可充电电池,主要是在锂离子电池和钠离子电池中的应用,分析讨论了此类正极材料研究中取得的成绩以及存在的问题和挑战.由于空心结构具有更多的反应位点、利于电解液的渗透以及能缓解充放电过程中的体积变化,空心结构化能明显改进下一代高比容量正极材料(比如富锂层型材料、钒基氧化物、硅酸盐等)的电学性能.这些材料往往表现出较低的电子电导率、离子扩散系数和较高的体积变化率.我们相信通过精确控制空心结构的空间结构、开发低成本可放大的合成策略,空心结构能为未来的高性能正极材料提供较为实用化的解决方案. | 朱晓波 唐佳勇 黄亨明 林同恩 罗彬 王连洲 | 2020 | Science Bulletin2020，65，6： | 0 |
| 13 | Preparation of LiNi_xCo_(l-x)O_2 Cathode Material for Li-ion Cells显示文摘The cathode materials LiNixCo1-xO2 (0≤x≤1) for lithium ion battery were prepared in solid phase . The effects of synthesis temperature , the time of heat treatment and also the ratio of raw materials on products were discussed . The residts showed that the products preheated under 600℃ and then sintered under constant, temperature 75017 were better than those sintered under constant temperature 650℃ or 850℃ , and their layer structures were more obvious and their initial capacity was higher . The longer the heat-treating time is , the stronger the products ' XRD peaks intensity and the better their structures and electrochemical performance are. The samples LiN-ix Co 1-xO2(0≤x≤1) with a perfect structure and electrochemical performance were synthesized. And the products initial capacity was perfect when n(Li) : n( Ni) : n( Co) ℃ 1.15:0.3:0.7,viz. 156.l46mAh/g. | 邹正光 | 2001 | Journal of Wuhan University of Technology(Materials Science)2001，16，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员