检索结果-南通市图书馆

Nano-Micro Letters 2024年第7期16卷 59-73页

作者： Leqi Zhao Yijun Zhong Chencheng Cao Tony Tang Zongping Shao WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerthWA 6102Australia

The pursuit of safer and high-performance lithium-ion batteries(LIBs)has triggered extensive research activities on solid-state batteries,while challenges related to the unstable electrode-electrolyte interface hinder their practical *** has been used extensively to improve the cathode-electrolyte interface in garnet-based all-solid-state LIBs(ASSLBs),while it introduces new concerns about thermal *** this study,we propose the incorporation of a multi-functional flame-retardant triphenyl phos-phate additive into poly(ethylene oxide),acting as a thin buffer layer between LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)cathode and garnet *** electrochemical stability tests,cycling performance evaluations,interfacial thermal stability analysis and flammability tests,improved thermal stability(capacity retention of 98.5%after 100 cycles at 60℃,and 89.6%after 50 cycles at 80℃)and safety characteristics(safe and stable cycling up to 100℃)are *** on various materials characterizations,the mechanism for the improved thermal stability of the interface is *** results highlight the potential of multi-functional flame-retardant additives to address the challenges associated with the electrode-electrolyte interface in ASSLBs at high *** thermal modification in ASSLBs operating at elevated temperatures is also essential for enabling large-scale energy storage with safety being the primary concern.

关键词： Solid-state battery Cathode electrolyte interlayer Flame-retardant additive cycling stability Interfacial stability

Enhanced cycling stability of single-crystal LiNi_(0.83)Co_(0.07)Mn_(0.10)O_(2)by Li-reactive coating with H_(3)BO_(3)

在线全文

学校读者我要写书评

暂无评论

稀有金属:英文版 2023年第8期42卷 2612-2621页

作者： Wen-Hui Hu Ya Yin Ya Sun Guo-Xue Liu Shun-Yi Yang You-Yuan Huang Bo Wang BTR New Material Group Co. LtdShenzhen 518000China Key Laboratory of Cluster Science Ministry of EducationSchool of Chemistry and Chemical EngineeringBeijing Instituteof Technology Beijing 100081China BTR Nano Tech Co. LtdShenzhen 518000China College of Chemistry and Environmental Engineering Wuhan Polytechnic UniversityWuhan 430023China

Ni-rich cathode materials will be primarily used as next-generation high-specific energy cathode materials in lithium-ion ***,residual Li formation and cracking considerably restrict the wide application of these *** address the issues related to cracking,micro-sized single-crystal cathode materials without internal grain boundaries are *** this study,we constructed a thin LiBO_(2)layer on the single-crystal LiNi_(0.83)Co_(0.07)Mn_(0.10)O_(2)particles by solvent-free H_(3)BO_(3)*** residual Li on the material surface decreased by 14%through the reaction of LiOH/Li_(2)CO_(3)and H_(3)BO_(3).The coated materials exhibited higher initial Coulombic efficiency(88.44%),higher reversible capacity(213.4 mAh·g^(-1)at 0.1 C),and better cycling performance(91.31%retention over 50 cycles within 3.0-4.3 V at 1.0C)than the unmodified *** the galvanostatic intermittent titration technique,electrochemical impedance spectroscopy(EIS),and inductively coupled plasma-optical emission spectroscopy(ICP-OES),we reveal the mechanism by which the electrochemical properties are improved upon H_(3)BO_(3)*** superior electrochemical performances are associated with increased Li+conductivity,lower charge transfer impedance,and suppressed transition metal ***,this study demonstrates the importance of surface modification in obtaining Ni-rich single-crystal materials with enhanced performance.

关键词： Ni-rich cathode Residual Li cycling stability Li-reactive coating Single crystal

Perspective on cycling stability of lithium-iron manganese phosphate for lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2023年第3期42卷 740-750页

作者： Kun Zhang Zi-Xuan Li Xiu Li Xi-Yong Chen Hong-Qun Tang Xin-Hua Liu Cai-Yun Wang Jian-Min Ma Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured Materials School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China School of Transportation Science and Engineering Beihang UniversityBeijing 102206China Intelligent Polymer Research Institute AIIMInnovation CampusUniversity of WollongongNSW 2500Australia

Lithium-iron manganese phosphates(LiFex Mn_(1-x)PO_(4),0.1cycling *** progress has been ac... 详细信息

Lithium-iron manganese phosphates(LiFex Mn_(1-x)PO_(4),0.1cycling *** progress has been achieved to solve these ***,we firstly summarized the influence of different electrolyte systems on the electrochemical performance of LiFexMn_(1-x)PO_(4),and then discussed the effect of element doping,lastly studied the influences of conductive layer coating and morphology control on the cycling ***,the prospects and challenges of developing high-cycling LiFexMn_(1-x)PO_(4) were proposed.

关键词： Lithium iron manganese phosphate Cathode cycling stability Electrolyte modification Doping Coating Controlled synthesis

Effect of Synergistic Anticorrosion Treatments on cycling stability of Mg-Based Hydrogen Storage Electrode

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2006年第z2期24卷 347-351页

作者：孔繁清闫慧忠熊玮王彦李宝犬李金安胜利 Baotou Research Institute of Rare Earths College of Material and Metallurgy Engineering Inner Mongolia University of Science and TechnologyBaotou 014010China College of Mechanical Engineering South China University of TechnologyGuangzhou 510641China College of Material and Metallurgy Engineering Inner Mongolia University of Science and Technology

In this paper, any two of the three anticorrosion agents, that is emulsifier (OP-10), soluble glass (Na2O·nSiO2) and glycerin (C3H8O3), were treated simultaneously on the surface of amorphous (a- ) MgNi + 5% Ml2Mg17(MI denotes the lanthanum-rich mish metal) electrode and the electrolyte. Effect of the synergistic anticorrosion treatment on charging/discharging cycle stability of the electrode was investigated. Contrasted with single treatment method, the cycling stability of the electrodes was further improved. The desirable synergistic anticorrosion method was that the electrode was treated by the soluble glass, and that OP-10 was added into the electrolyte. The cyclic voltammogram (CV) results of the electrode show clearly that the anticorrosion agent can change the electrochemical activity and mechanism of the electrode. The concentration of the anticorrosion agent in the electrolyte treated by the synergistic anticorrosion method was also investigated. The appropriate concentration of the anticorrosion agents in the electrolyte is 0.143% .

关键词： hydrogen storage materials MgNi La2Mg17 anti-corrosion agent hydride electrode cycling stability rare earths

Interconnected and high cycling stability polypyrrole supercapacitors using cellulose nanocrystals and commonly used inorganic salts as dopants

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第1期76卷 165-174,I0005页

作者： Zuxin Sun Wim Thielemans Sustainable Materials Lab Department of Chemical EngineeringKU LeuvenCampus Kulak KortrijkEtienne Sabbelaan 538500 KortrijkBelgium

Polypyrrole(PPy)is wildly used as electrode material in supercapacitors due to its high conductivity,low cost,ease of handling,and ease of ***,limited capacitance and poor cycling stability hinder its practical *** developing carboxylated cellulose nanocrystals(CNC-COO^(-))as immobile dopants for PPy to improve its cycling stability,we investigated the effect of different commonly used salts(KCl,NaCl,KBr,and NaClO_(4))as dopants during electrode fabrication by *** film’s capacitance increased from 160.6 to 183.4 F g^(-1)after adding a combination of KCl and NaClO_(4) into the electrodeposition *** importantly,the porous and interconnected PPy/CNC-COO^(-)-Cl-(Cl O_(4)^(-))_0.5 electrode film exhibited an excellent capacitance of 125.0 F g^(-1)(0.78 F cm^(-2))at a high current density of 2.0 Ag^(-1)(20 m A cm^(-2),allowing charging in less than 1 min),increasing almost 204%over PPy/CNC-COO-films.A symmetric PPy/CNC-COO^(-)-Cl-(ClO_(4)^(-))_0.5 supercapacitor retained its full capacitance after 5000 cycles,and displayed a high energy density of 5.2 Wh kg^(-1)at a power density of 25.4 W kg^(-1)(34.5μWh cm^(-2) at 1752.3μW cm^(-2)).These results reveal that the porous structure formed by doping with CNC-COO-and inorganic salts opens up more active reaction areas to store charges in PPy-based films as the stiff and ribbon-like CNC-COO-as permanent dopants improve the strength and stability of PPy-based *** demonstration provides a simple and practical way to deposit PPy based supercapacitors with high capacitance,fast charging,and excellent cycling stability.

关键词： Polypyrrole Cellulose nanocrystals cycling stability Inorganic salts Supercapacitor

High-performance supercapacitors based on free-standing SiC@PEDOT nanowires with robust cycling stability

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第3期31卷 30-37,I0002页

作者： Wenna Liu Xiaoxiao Li Weijun Li Yumin Ye Hong Wang Peipei Su Weiyou Yang Ya Yang Ningbo Key Laboratory of Specialty Polymers School of Materials Science and Chemical EngineeringNingbo UniversityNingbo 315211ZhejiangChina Institute of Materials Ningbo University of TechnologyNingbo 315016ZhejiangChina CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China

Conductive polymers as one of the candidate materials with pseudocapacitor behavior have inspired wide attentions,because of their high conductivity,fexibility,low cost and excellent ***,the intrinsically poor cycling stability induced by the volume change over the doping/dedoping redox process limits their practical ***,we report the exploration of electrodes with robust cycling capacity for supercapacitors(SCs),which are rationally designed by coating conductive poly(3,4-ethylenedioxythiophene)(PEDOT)around free-standing SiC nanowires using an all-dry oxidative chemical vaper deposition(oCVD)*** as-constructed SiC@PEDOT nanowire architecture enables a specific capacitance of 26.53 m F/cm^(2)at 0.2 m A/cm^(2),which is~370%to that of SiC nanowire counterpart(7.04 m F/cm^(2)).Moreover,their aqueous-based SCs exhibit robust cycling stability with104%capacity retention after 10000 cycles,which is among the highest values achieved for PEDOTbased SCs.

关键词： PEDOT SiC nanowires Supercapacitor Energy storage cycling stability

One-pot synthesis of CoO-ZnO/rGO supported on Ni foam for high-performance hybrid supercapacitor with greatly enhanced cycling stability

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第6期32卷 2027-2032页

作者： Mingsheng Xu Mingze Sun Sajidur Rehman Kangkang Ge Xiaolong Hu Haizhen Ding Jichang Liu Hong Bi School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601China State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China

The high specific capacitance along with good cycling stability are crucial for practical applications of supercapacitors,which always demands high-performance and stable electrode *** this work,we report a series of ternary composites of CoO-ZnO with different fractions of reduced graphene oxide(rGO)synthesized by in-situ growth on nickel foam,named as CZG-1,2 and 3,*** sort of binder-free electrodes presents excellent electrochemical properties as well as large capacitance due to their low electrical resistance and high oxygen ***,the sample of CZG-2(CoO-ZnO/rGO 20 mg)in a nanoreticular structure shows the best electrochemical performance with a maximum specific capacitance of 1951.8 F/g(216.9 mAh/g)at a current intensity of 1 A/*** CZG-2-based hybrid supercapacitor delivers a high energy density up to 45.9 Wh/kg at a high power density of 800 W/kg,and kept the capacitance retention of 90.1%over 5000 charge-discharge cycles.

关键词： Supercapacitor Metal oxide Graphene oxide Energy density cycling stability

Improving the cycling stability and rate capability of LiMn_(0.5)Fe_(0.5)PO_(4)/C nanorod as cathode materials by LiAlO_(2) modification

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2020年第1期6卷 33-44页

作者： Ting-Feng Yi Ying Li Zikui Fang Ping Cui Shaohua Luo Ying Xie a School of Materials Science and Engineering Northeastern UniversityShenyang110819China Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin150080China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao066004China School of Chemistry and Chemical Engineering Anhui University of TechnologyMaanshanAnhui243002China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province QinhuangdaoChina

LiMn_(0.5)Fe_(0.5)PO_(4)(LMFP)@C and LMFP@LiAlO_(2)@C nanorods are successfully synthesized by a solvothermal process followed by a calcination at H2/Ar *** carbon coating and LiAlO_(2) coating does not change the morphology and particle size of LMFP,and all samples show nanorod morphology with 50-100 nm in width and 200-300 nm in *** results show that LiAlO_(2) coating can offer rapid charge transfer channels with improved intercalation/de-intercalation kinetics of Li ions,which make an outstanding rate capability and cycling stability of as-synthesized LMFP@LiAlO_(2)@C *** a result,LiAlO_(2) coating effectively improves the rate capability and cycling stability of LMFP cathode even at high discharge ***,LMFP@LiAlO_(2)(5 wt%)@C indicates an outstanding rate performance with a reversible discharge capacity of 137.6 and 113.2 mAh g^(-1) discharged at 0.05 C and 5 C rates,and the composite also shows a good cycle performance with an excellent capacity of 107 mAh g^(-1) and 86.4% capacity retention rate at 5 C rate after 100 ***,the LiAlO_(2) coating can be considered as an effective way to improve the electrochemical properties of LMFP.

关键词： LiAlO_(2) LiMn_(0.5)Fe_(0.5)PO_(4) cycling stability Cathode material Li-ion battery

Enhanced cycling stability of Mg-F co-modified LiNi_(0.6)Co_(0.2)Mn_(0.2-y)Mg_yO_(2-z)F_z for lithium-ion batteries

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2018年第7期28卷 1398-1404页

作者： Qi-chao CHEN Guan-jie YAN Li-ming LUO Fei CHEN Tang-feng XIE Shi-can DAI Ming-liang YUAN School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China

The layered LiNi0.6Co0.2Mn0.2-yMgyO2-zFz（0≤y≤0.12, 0≤z≤0.08） cathode materials were synthesized by combining co-precipitation method and high temperature solid-state reaction, with the help of the ball milling, to investigate the effects of F-Mg doping on LiNi0.6Co0.2Mn0.2O）2. Compared with previous studies, this doping treatment provides substantially improved electrochemical performance in terms of initial coulombic efficiency and cycle performance. The LiNi0.6Co0.2Mn0.11Mg0.09O1.96F0.04 electrode delivers an high capacity retention of 98.6% during the first cycle and a discharge capacity of 189.7 m A·h/g（2.8-4.4 V at 0.2 C）, with the capacity retention of 96.3% after 100 cycles. And electrochemical impedance spectroscopy（EIS） results show that Mg-F co-doping decreases the charge-transfer resistance and enhances the reaction kinetics, which is considered to be the major factor for higher rate performance. It is demonstrated that LiNi0.6Co0.2Mn0.11Mg0.09O1.96F0.04 is a promising cathode material for lithium-ion batteries for excellent electrochemical properties.

关键词： nickel-rich cathode material F-Mg doping high columbic efficiency cycling stability

Superior room-temperature cycling stability of fluoride-ion batteries enabled by solid electrolytes synthesized by the solid-state reaction

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2022年第11期65卷 3025-3032页

作者： Jinzhu Wang Cheng Ma Hefei National Research Center for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

All-solid-state fluoride-ion batteries(ASSFIBs)exhibit ultrahigh theoretical energy densities up to5000 W h L,and thus receive increasing ***,due to the difficulty of identifying appropriate solid electrolytes,it was commonly believed that ASSFIBs cannot exhibit satisfactory long-term cycling performance at 25℃.Recently,this situation is changed by the discovery of CsPb_(0.9)K_(0.1)F_(2.9),which shows a rare combination of high ionic conductivity and excellent electrochemical ***,we discover that the performance of this material can be further improved by simply altering the reported mechanochemical synthesis approach with the solid-state *** resulting material shows a room-temperature conductivity of 2.2 mS cm^(-1),outperforming the most conductive F-ion solid electrolyte reported so far(PbSnF,1.6 mS cm^(-1)).More importantly,it enables 100 cycles of stable ASSFIB operation at 25℃for the first time,with a final capacity(152.5 mA h g^(-1) after 100 cycles)also surpassing all the other room-temperature bulk-type ASSFIBs in literature(below 80 mA h g^(-1) after no more than20 cycles).

关键词： all-solid-state fluoride-ion batteries room temperature solid electrolyte cycling stability long-term cycling