检索结果-南通市图书馆

Regulating surface chemistry of separator with LiF for advanced Li-S batteries

在线全文

学校读者我要写书评

暂无评论

Frontiers in energy 2022年第4期16卷 601-606页

作者： Shuai WANG Fanyang HUANG Shuhong JIAO Yulin JIE Yawei CHEN Shiyang WANG Ruiguo CAO Hefei National laboratory for Physical Science at the Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Lithium-sulfur(Li-S)batteries have attracted intensive attention owing to their ultrahigh theoretical energy density.Nevertheless,the practical application of Li-S batteries is prevented by uncontrollable shuttle effect and retarded reaction kinetics.To address the above issues,lithium fluoride(LiF)was employed to regulate the surface chemistry of routine separator.The functional separator demonstrates a great ability to suppress active S loss and protect lithium anode.This work provides a facile strategy for the development of advanced Li-S batteries.

关键词： Li-S batteries LiF functional separator

Alloxazine as anode material for high-performance aqueous ammonium-ion battery

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

Nano Research 2022年第3期15卷 2047-2051页

作者： Yuan Ma Tianjiang Sun Qingshun Nian Shibing Zheng Tao Ma Qiaoran Wang Haihui Du Zhanliang Tao key laboratory of Advanced energy materials Chemistry(Ministry of Education) Renewable Energy Conversion and Storage CenterCollege of ChemistryNankai UniversityTianjin 300071China Hefei National laboratory for Physical Science at the Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Aqueous ammonium-ion battery(AAIB)has attracted much attention due to its low cost,safety,and environmental friendliness,but its electrode materials have many limitations.Here,alloxazine(ALO)is introduced as the anode for the AAIB.With its pseudocapacitive effect and fast diffusion kinetics of NH4+,ALO anode shows excellent rate performance with a specific capacity of 120 mAh/g at 40 C(10 A/g).The full battery is further fabricated by ALO anode and Prussian white analogs cathode.Its specific capacity can reach 110 mAh/g and it can work up to 10,000 cycles with no obvious capacity fading at 20 C(5 A/g).In addition,the system delivers a high energy density of 122.5 Wh/kg and a power density of 5,055 W/kg.This work broadens the application prospect of the AAIB.

关键词： aqueous ammonium-ion battery alloxazine anode material pseudocapacitive effect

NS codoped carbon nanorods as anode materials for high-performance lithium and sodium 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

Journal of energy Chemistry 2018年第1期27卷 203-208页

作者： Ajuan Hu Song Jin Zhenzhen Du Hongchang Jin Hengxing Ji Department of materials Science and Engineering CAS Key Laboratory of Materials for Energy Conversion iChEM University of Science and Technology of China

NS codoped carbon nanorods（NS-CNRs） were prepared using crab shell as template and polyphenylene sulfide（PPS） as both the C and S precursor, followed by carbonization in NH_3. The as-obtained NS-CNRs had a diameter of ~50 nm, length of several micrometers, and N and S contents of 12.5 at.% and 3.7 at.%,respectively, which can serve as anodes for both lithium-ion batteries（LIBs） and sodium ion batteries（SIBs）. When serving as an anode of LIB, the NS-CNRs delivered gravimetric capacities of 2154 mAh g^（-1）at current densities of 0.1 A g^（-1）and 625 mAh g^（-1）at current densities of 5.0 A g^（-1）for 1000 cycles.When serving as an anode of SIB, the NS-CNRs delivered gravimetric capacities of 303 mAh g^（-1）at current densities of 0.1 A g^（-1）and 230 mAh g^（-1）at current densities of 1.0 A g^（-1）for 3000 cycles. The excellent electrochemical performance of NS-CNRs could be ascribed to the one-dimensional nanometer structure and high level of heteroatom doping. We expect that the obtained NS-CNRs would benefit for the future development of the doped carbon materials for lithium ion batteries and other extended applications such as supercapacitor, catalyst and hydrogen storage.

关键词： NS codoped carbon Crab shell template Lithium ion batteries Sodium ion batteries

Molecular Engineering Design for High-Performance Aqueous Zinc-Organic Battery

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2023年第3期15卷 98-111页

作者： Tianjiang Sun Weijia Zhang Qingshun Nian Zhanliang Tao key laboratory of Advanced energy materials Chemistry(Ministry of Education) College of ChemistryHaihe Laboratory of Sustainable Chemical TransformationsRenewable Energy Conversion and Storage CenterNankai UniversityTianjin 300071People’s Republic of China CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and EngineeringHefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China HefeiHefei 230026AnhuiPeople’s Republic of China

Novel small sulfur heterocyclic quinones(6a,16adihydrobenzo[b]naphtho[2′,3′:5,6][1,4]dithiino[2,3-i]thianthrene-5,7,9,14,16,18-hexaone(4S6Q)and benzo[b]naphtho[2′,3′:5,6][1,4]dithiino[2,3-i]thianthrene-5,9,14,18-tetraone(4S4Q))are developed by molecule structural design method and as cathode for aqueous zincorganic batteries.The conjugated thioether(–S–)bonds as connected units not only improve the conductivity of compounds but also inhibit their dissolution by both extendedπ-conjugated plane and constructed flexible molecular skeleton.Hence,the Zn//4S6Q and Zn//4S4Q batteries exhibit satisfactory electrochemical performance based on 3.5 mol L-1(M)Zn(ClO4)2electrolyte.For instance,the Zn//4S6Q battery obtains 240 and 208.6 mAh g^(-1)of discharge capacity at 150 mA g^(-1)and 30 A g^(-1),respectively.The excellent rate capability is ascribed to the fast reaction kinetics.This system displays a superlong life of 20,000 cycles with no capacity fading at 3 A g^(-1).Additionally,the H+-storage mechanism of the 4S6Q compound is demonstrated by ex situ analyses and density functional theory calculations.Impressively,the battery can normally work at-60℃benefiting from the anti-freezing electrolyte and maintain a high discharge capacity of 201.7 mAh g^(-1),which is 86.2%of discharge capacity at 25℃.The cutting-edge electrochemical performances of these novel compounds make them alternative electrode materials for Zn-organic batteries.

关键词： Aqueous Zn-organic battery Small sulfur heterocyclic quinones Conjugated thioether skeleton Superlong cycling life H+-involved mechanism -60℃

固态反应合成的固态电解质实现氟离子电池优异的室温循环稳定性

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：王金柱马骋 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

全固态氟离子电池因其高达5000 W h L的理论能量密度而受到越来越多的关注.由于难以确定合适的固体电解质,人们认为全固态氟离子电池几乎不可能在25℃下进行长循环.最近,CsPbKF的发现改变了这种情况,它在离子导电性和电化学稳定性方面... 详细信息

全固态氟离子电池因其高达5000 W h L的理论能量密度而受到越来越多的关注.由于难以确定合适的固体电解质,人们认为全固态氟离子电池几乎不可能在25℃下进行长循环.最近,CsPbKF的发现改变了这种情况,它在离子导电性和电化学稳定性方面都具有独特的优势.在这项工作中,我们发现把文献中报道的机械化学合成方法改为固相反应后,可以进一步提高这种材料的性能.所得材料的室温电导率为2.2 mS cm^(-1),优于迄今为止报道的离子电导率最高的氟离子固体电解质(PbSnF,1.6 mS cm^(-1)).更重要的是,它首次实现了全固态氟离子电池在25℃下100次稳定循环,最终容量(100次循环后152.5 mA h g^(-1))也超过了文献中所有其他室温全固态氟离子电池(不超过20次循环,低于80 mA h g^(-1)).

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

Synthesis of dihydrocapsaicin and dihydrocapsiate exclusively from lignocellulosic platform chemicals

在线全文

学校读者我要写书评

暂无评论

Green energy & Environment 2022年第3期7卷 519-524页

作者： Yan-Bing Li Hui-Ying Guo Chen-Qiang Deng Jin Deng Hefei National laboratory for Physical Sciences at the Microscale IChemCAS Key Laboratory of Urban Pollutant ConversionAnhui Province Key Laboratory of Biomass Clean EnergyDepartment of ChemistryUniversity of Science and Technology of ChinaHefeiAnhui230026China cas key laboratory of Renewable energy Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhouGuangdong510640China

Biorefinery is pivotal to the sustainability of modern chemical industry.However,since biomass is oxygen-enriched,new and green chemical strategies are required for expanding the biomass derived chemical space.In this work,synthesis of natural products dihydrocapsaicin and dihydrocapsiate was achieved exclusively from lignocellulosic platform chemicals.Natural products dihydrocapsaicin and dihydrocapsiate were synthesized exclusively from lignocellulosic platform chemicals,using furfural(from hemicellulose)and methyl isopropyl ketone(from cellulose)through aldol condensation-hydrolysis-hydrodeoxygenation to synthesize 8-methylnonanoic acid and then combined with vanillin derivates(from lignin).This synthesis demonstrates the feasibility of constructing natural products entirely from renewable biomass platform through green processes.The utilization of inherent functional groups of biomass demonstrates their potential to open up chemical space.

关键词： space synthesis hydrolysis

Molecular sieve based Janus separators for Li-ions redistribution to enable stable lithium deposition

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第6期15卷 5143-5152页

作者： Huanyu Xie Zhimeng Hao Shuai Xie Yadong Ye Wei Zhang Zhaowei Sun Song Jin Hengxing Ji Jun Chen Hefei National laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China key laboratory of Advanced energy materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

During operation of a lithium metal battery,uneven lithium deposition often results in the growth of lithium dendrites and causes a rapid decay in battery performance and even leads to safety issues.This is still the main hurdle hindering the practical application of lithium metal anodes.We report a new type of Janus separator fabricated by introducing a molecular sieve coating on the surface of the polypropylene separator that serves as a redistribution layer for lithium ions.Our results show that using this layer,the growth of lithium dendrites can be largely inhibited and the battery performance greatly improved.In a typical Li||Cu half-cell with the Janus separator,the Coulombic efficiency of the lithium metal anode can be maintained at>98.5%for over 500 cycles.The cycling life span is also extended by a factor of 8 in the Li||Li symmetric cell.Furthermore,the high-strength coating improves the mechanical properties of the separator,thus enhancing safety.The effectiveness of our strategy is demonstrated by both the inhibited growth of lithium dendrites and the improved battery performance.Our methodology could eventually be generalized for electrode protection in other battery systems.

关键词： Janus separator molecular sieve redistribution lithium metal anode deposition

On-demand molecular design for efficient blue phosphorescence

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

Science China Chemistry 2024年第7期67卷 2124-2126页

作者： Meiqi Dai Dongpeng Yan Beijing Normal University Ministry of Education College of Chemistry key laboratory of Radiopharmaceuticals Beijing key laboratory of energy conversion and Storage materials

Blue luminescence(including both fluorescence and phosphorescence) is one of the core elements in solid-state lighting and full-color displays. Up to now, ultralong room temperature phosphorescence(RTP) with a long lifetime over 0.1 s has been continuously reported. Most ultralong phosphorescence emission bands are in the region of 500 to600 nm. However, high-energy blue phosphorescence remains an immense challenge [1].

关键词：

Cobalt and nitrogen atoms co-doped porous carbon for advanced electrical double-layer capacitors

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第2期32卷 830-833页

作者： Aiqin Xiang Shuai Xie Fei Pan Hongchang Jin Yiheng Zhai Yanwu Zhu Xianghua Kong Hengxing Ji School of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009China Hefei National laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy Conversion.Department of Applied ChemistryUniversity of Science and Technology of China.Hefei 230026China Hefei National laboratory 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 CAS Key Laboratory of Materials for Energy Conversion Hefei 230026China

Electrical double-layer capacitors are widely concerned for their high power density,long cycling life and high cycling efficiency.However,their wide application is limited by their low energy density.In this study,we propose a simple yet environmental friendly method to synthesize cobalt and nitrogen atoms co-doped porous carbon(CoAT-NC) material.Cobalt atoms connected with primarily pyridinic nitrogen atoms can be uniformly dispersed in the amorphous carbon matrix,which is benefit for improving electrical conductivity and density of states of the carbon material.Therefore,an enhanced perfo rmance is expected when CoAT-NC is served as electrode in a supercapacitor device.CoAT-NC displays a good gravimetric capacitance of 160 F/g at 0.5 A/g combing with outstanding capacitance retention of 90% at an extremely high current density of 100 A/g in acid electrolyte.Furthermore,a good energy density of 30 Wh/kg can be obtained in the organic electrolyte.

关键词： Electrical double-layer capacitors Cobalt atoms Pyridinic nitrogen Co-doped Density of states