检索结果-南通市图书馆

A high-capacity and long-lifespan SnO_(2)@K-MnO_(2) cathode material for aqueous zinc-ion batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Materials Science 2024年第3期18卷 45-57页

作者： xiaoqing Jin Yae Qi yongyao xia College of Chemistry and Chemical Engineering Key Laboratory of Hexi Corridor Resources Utilization of GansuHexi UniversityZhangye 734000China Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsInstitute of New EnergyiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Fudan UniversityShanghai 200433China

Aqueous Zn/MnO_(2) rechargeable zinc-ion batteries(ZIBs)possess potential applications in electrochemical energy storage due to their safety,low cost,and environmental ***,manganese dioxide as the cathode material has poor cycle stability and low *** this work,the SnO_(2)@K-MnO_(2)(SMO)composite was prepared using the hydrothermal method followed by the treatment with SnCl_(2) sensitization,and its electrochemical characteristics were examined using SMO as the cathode material for *** reversible specific capacity reaches 298.2 mA·h-g^(-1) at 0.5A·g^(-1),and an excellent capacity retention of 86%is realized after 200 cycles,together with a high discharge capacity of 105 mA·h·g^(-1) at 10 A·g^(-1) and a long-term cycling life of over 8000 cycles with no apparent capacity *** cathode exhibits a long cycle life up to 2000 cycles at 2 Ag^(-1) with the mass loading of 5 mg·cm^(-2),and the battery maintains the capacity of 80%.The reversible co-embedding mechanism of H^(+)/Zn^(2+) in such a ZnlSMO battery was confirmed by XRD and SEM during the chargeldischarge *** work can enlighten and promote the development of advanced cathode materialsforZIBs.

关键词： zinc ion battery SnO_(2)@K-MnO_(2) cathode material energy storage mechanism

Enabling Mg metal anodes rechargeable in conventional electrolytes by fast ionic transport interphase

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2020年第2期7卷 333-341页

作者： Ruijing Lv Xuze Guan Jiahua Zhang yongyao xia Jiayan Luo Key Laboratory for Green Chemical Technology of Ministry of Education State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Department of Chemistry Fudan University

Rechargeable magnesium batteries have received extensive attention as the Mg anodes possess twice the volumetric capacity of their lithium counterparts and are dendrite-free. However, Mg anodes suffer from surface passivation film in most glyme-based conventional electrolytes, leading to irreversible plating/stripping behavior of Mg. Here we report a facile and safe method to obtain a modified Mg metal anode with a Sn-based artificial layer via ion-exchange and alloying reactions. In the artificial coating layer, Mg2Sn alloy composites offer a channel for fast ion transport and insulating MgCl2/SnCl2bestows the necessary potential gradient to prevent deposition on the surface. Significant improved ion conductivity of the solid electrolyte interfaces and decreased overpotential of Mg symmetric cells in Mg(TFSI)2/DME electrolyte are obtained. The coated Mg anodes can sustain a stable plating/stripping process over 4000 cycles at a high current density of 6 mA cm-2. This finding provides an avenue to facilitate fast ion diffusion kinetics of Mg metal anodes in conventional electrolytes.

关键词： fast ion transport interphase artificial layer Mg metal anodes conventional electrolytes

The pathway toward practical application of lithium-metal anodes for non-aqueous secondary batteries

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2022年第8期9卷 194-210页

作者： Panlong Li Zhong Fang xiaoli Dong Congxiao Wang yongyao xia Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University

The revolution of automotive vehicles(from petrol vehicles to electric vehicles) has set high demands for the performance of batteries. Lithium-metal batteries(LMBs) show great potential owing to their high energy density but encounter poor cycle life and safety issues. It is of great significance to reveal LMB failure mechanisms and understand their relationship with battery performance. This review presents an overview of the state-of-the-art Li-metal anodes, with an emphasis on two typical failure modes: capacity degradation and dendritic growth of Li metal. The critical correlations between the composition, structure and failure are explained point by point. The chemical and electrochemical stabilities of the lithium anode are ***, for the first time, five types of lithium-metal anodes are classified to develop a comprehensive understanding of LMBs. Furthermore, strategies are suggested to improve the practical performance of LMBs, including material innovation, electrolyte modification and advanced characterization.

关键词： lithium-metal anode failure mode concentration polarization dead Li

Low-cost and high safe manganese-based aqueous battery for grid energy storage and conversion

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2019年第23期64卷 1780-1787页

作者： Jianhang Huang Zhaowei Guo xiaoli Dong Duan Bin Yonggang Wang yongyao xia Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New EnergyiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Fudan UniversityShanghai 200433China Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Department of ChemistryZhejiang Normal UniversityJinhua 321004China School of Materials Science and Engineering Nanchang Hangkong UniversityNanchang 330063China

As an effective energy storage technology, rechargeable batteries have long been considered as a promising solution for grid integration of intermittent renewables(such as solar and wind energy). However,their wide application is still limited by safety issue and high cost. Herein, a new battery chemistry is proposed to satisfy the requirements of grid energy storage. We report a simple Cu-Mn battery, which is composed of two separated current collectors in an H2SO4-CuSO4-MnSO4 electrolyte without using any membrane. The Cu-Mn battery shows an energy density of 40.8 Wh L-1, a super-long life of 10,000 cycles(without obvious capacity decay) and negligible self-discharge. And the capital cost of US$ 11.9 kWh-1 based on electrolyte is lower than any previous batteries. More importantly, the battery can still work smoothly during thermal abuse test and drill-through test, showing high safe nature. Furthermore, a combination system integrating the Cu-Mn battery and hydrogen evolution is also proposed, which is able to avoid the generation of explosive H2/O2 mixture, and presents an efficient approach for grid energy storage and conversion.

关键词： Manganese dioxide Copper electrode Aqueous battery Decoupled hydrogen evolution Water splitting Large-scale energy storage

Machine learning molecular dynamics simulation identifying weakly negative effect of polyanion rotation on Li-ion migration

在线全文

学校读者我要写书评

暂无评论

npj Computational Materials 2023年第1期9卷 1276-1286页

作者： Zhenming Xu Huiyu Duan Zhi Dou Mingbo Zheng Yixi Lin Yinghui xia Haitao Zhao yongyao xia College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics210016 NanjingChina Center for Intelligent and Biomimetic Systems Shenzhen Institutes of Advanced Technology(SIAT)Chinese Academy of Sciences(CAS)518055 ShenzhenChina Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New EnergyiChEm(Collaborative Innovation Center of Chemistry for Energy Materials)Fudan University200433 ShanghaiChina

Understanding the physical picture of Li ion transport in the current ionic conductors is quite essential to further develop lithium superionic conductors for solid-state *** traditional practice of directly extrapolating room temperature ion diffusion properties from the high-temperature(>600 K)ab initio molecular dynamics simulations(AIMD)simulations by the Arrhenius assumption unavoidably cause some ***,the ultralong-time molecular dynamics simulation based on the machine-learning interatomic potentials(MLMD)is a more suitable tool to probe into ion diffusion events at low temperatures and simultaneously keeps the accuracy at the density functional theory ***,by the low-temperature MLMD simulations,the non-linear Arrhenius behavior of Li ion was found for Li3ErCl6,which is the main reason for the traditional AIMD simulation overestimating its ionic *** 1μs MLMD simulations capture polyanion rotation events in Li_(7)P_(3)S_(11) at room temperature,in which four[PS_(4)]^(3−)tetrahedra belonging to a part of the longer-chain[P_(2)S_(7)]4−group are noticed with remarkable rotational motions,while the isolated group[PS_(4)]^(3−)does not ***,no polyanion rotation is observed in Li10GeP_(2)S12,β-Li3PS_(4),Li3ErCl6,and Li3YBr6 at 300 K during 1μs simulation ***,the ultralong-time MLMD simulations demonstrate that not only there is no paddle-wheel effect in the crystalline Li_(7)P_(3)S_(11) at room temperature,but also the rotational[PS_(4)]^(3−)polyanion groups have weakly negative impacts on the overall Li ion *** ultralong-time MLMD simulations deepen our understanding of the relationship between the polyanion rotation and cation diffusion in ionic conductors at room environments.

关键词： rotation dynamics effect

SnSb@carbon nanocable anchored on graphene sheets for sodium ion batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2014年第10期7卷 1466-1476页

作者： Li Li Kuok Hau Seng Dan Li yongyao xia Hua Kun Liu Zaiping Guo Institute for Superconducting and Electronic Materials University of Wollongong North Wollongong NSW 2500 Australia Department of Chemistry Institute of New Energy Fudan University Shanghai 200438 China School of Mechanical Materials and Mechatronics Engineering University of Wollongong Wollongong NSW 2522 Australia

The development of materials with unique nanostructures is an effective strategy for the improvement of sodium storage in sodium ion batteries to achieve stable cycling performance and good rate capability. In this work, SnSb- core/carbon-shell nanocables directly anchored on graphene sheets （GS） were synthesized by the hydrothermal technique and chemical vapor deposition. The simultaneous carbon coating and the encapsulation of SnSb alloy is effective for alleviating the volume-change problem in sodium ion batteries. After optimizing the electrolyte for SnSb in the sodium ion batteries, the optimized coaxial SnSb/carbon nanocable/GS （SnSb/CNT@GS） nanostructure demonstrated stable cycling capability and rate performance in 1 M NaClO4 with propylene carbonate （PC）＋ 5% fluoroethylene carbonate （FEC）. The SnSb/CNT@GS electrode can retain a capacity of 360 mAh/g for up to 100 cycles, which is 71% of the theoretical capacity. This is higher than in the other three electrolytes tested （1 M NaClO4 in PC, 1 M NaC104 in PC/FEC （1：1 v/v） and 1 M NaPF6 ＋ PC）, and higher than that of the sample without the addition of graphene. The good electrochemical performance can be attributed to the efficient buffering provided by the outer carbon nanocable layer and the graphene inhibiting the agglomeration of SnSb particles, as well as its high conductivity.

关键词： SnSb grapheme coaxial structure sodium ion batteries

Revisiting the sodium-ion storage capability of hard carbon in carbonate-based electrolytes via a sodium-metal-free protocol

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第7期67卷 2240-2247页

作者： Gaopan Liu Yanbing Mo Jiawei Chen Yu Peng xiao Zhu Fei Wang xiaoli Dong yongyao xia Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New EnergyLaboratory of Advanced MaterialsFudan UniversityShanghai 200438China

Common evaluation methodology of sodium(Na)-containing two-electrode or three-electrode configurations overlooks the interference from highly reactive Na metal,leading to the underestimation or inconsistent performance of low-potential hard carbon(HC)***,the trap of Na metal was systematically investigated with or without applied current,uncovering its inadequacy as the reference or counter electrode in different configurations.A Na-metal-free three-electrode protocol is proposed for evaluating the actual Na^(+)-storage capability of the typical low-potential HC *** avoiding Na crosstalk and precisely controlling the working electrode's potential,the actual electrochemical performance of HC in the carbonate esterbased electrolyte can be recognized with high capacity of 222 mAh g^(-1)at 2 C and 113 mAh g^(-1)at 5 C,correcting the misunderstanding of the inferior performance of HC in coin-type half cells(68%and 50%undervaluation at 2 C and 5 C,respectively).The advanced protocol is expected to reduce misunderstandings or underestimation due to evaluation methods and to guide the development of high-performance battery materials.

关键词： highly reactive sodium potential drift carbonate ester sodium-metal-free protocol sodium storage capability

同方期刊数据库

High performance TiP_2O_7 nanoporous microsphere as anode material for aqueous lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2019年第1期62卷 118-125页

作者： Yunping Wen Yao Liu Duan Bin Zhuo Wang Congxiao Wang Yuliang Cao Xinping Ai yongyao xia Collaborative Innovation Center of Chemistry for Energy Materials Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Fudan University Hubei Key Laboratory Electrochem Power Sources College of Chemistry and Molecular Science Wuhan University

This work developed a facile way to mass-produce a carbon-coated TiP_2O_7 nanoporous microsphere(TPO-NMS) as anode material for aqueous lithium-ion batteries via solid-phase synthesis combined with spray drying method. TiP_2O_7 shows great prospect as anode for aqueous rechargeable lithium-ion batteries(ALIBs) in view of its appropriate intercalation potential of-0.6 V(vs. SCE) before hydrogen evolution in aqueous electrolytes. The resulting sample presents the morphology of secondary microspheres(ca. 20 μm) aggregated by carbon-coated primary nanoparticles(100 nm), in which the primary nanoparticles with uniform carbon coating and sophisticated pore structure greatly improve its electrochemical performance. Consequently, TPONMS delivers a reversible capacity of 90 mA h/g at 0.1 A/g, and displays enhanced rate performance and good cycling stability with capacity retention of 90% after 500 cycles at 0.2 A/g. A full cell containing TPO-NMS anode and LiMn_2O_4 cathode delivers a specific energy density of 63 W h/kg calculated on the total mass of anode and cathode. It also shows good rate capacity with56% capacity maintained at 10 A/g rate(vs. 0.1 A/g), as well as long cycle life with the capacity retention of 82% after 1000 cycles at 0.5 A/g.

关键词： aqueous lithium-ion batteries H2 evolution reaction anode TiP2O7 spray drying

A dendrite-free Li plating host towards high utilization of Li metal anode in Li–O_2 battery

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2019年第7期64卷 478-484页

作者： Chao Li Jishi Wei Panlong Li Wenfei Tang Wuliang Feng Jingyuan Liu Yonggang Wang yongyao xia Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University

The intense interest of Li–O_2 battery stems from its ultrahigh theoretical energy density, but its application is still hindered by the issues of Li anode. Herein, RuO_2-CNTs composite, a conventional O_2 cathode catalyst in Li–O_2 battery, is first utilized as an anode host for dendrite-free Li plating/stripping with high Coulombic efficiency. It is demonstrated that such excellent plating/stripping performance arises from the lithiophilicity characteristic of Ru nanoparticles(that is derived from the in-situ electrochemical conversion from RuO_2 to Ru/Li_2O) and buffer space provided by CNTs. Furthermore, the RuO_2-CNTs electrode pre-deposited with limited Li(RuO_2-CNTs@Li anode) is coupled with a RuO_2-CNTs catalytic cathode to form a Li–O_2 full cell, which displays an extended cycle life with dramatically improved energy *** achieved cell shows a high stability of 200 cycles with RuO_2-CNTs@Li anode(1 mg Li) that sheds light on the efficient utilization of Li anode in Li–O_2 batteries.

关键词： Li metal anode Li utilization Li-O2 battery Dendrite-free High energy density