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In Situ Monitoring the Potassium‑Ion Storage Enhancement in Iron Selenide with ether‑based electrolyte

Nano-Micro Letters 2021年第11期13卷 294-307页

作者： Xiaodan Li Jinliang Li Wenchen Zhuo Zhibin Li Liang Ma Zhong Ji Likun Pan Wenjie Mai Siyuan Laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy MaterialsGuangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New MaterialsDepartment of PhysicsJinan UniversityGuangzhouGuangdong 510632People’s Republic of China Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241People’s Republic of China

As one of the promising anode materials,iron selenide has received much attention for potassium-ion batteries(KIBs).Nevertheless,volume expansion and sluggish kinetics of iron selenide result in the poor reversibility and stability during potassiation–depotassiation *** this work,we develop iron selenide composite matching ether-based electrolyte for KIBs,which presents a reversible specific capacity of 356 mAh g^(−1) at 200 mA g^(−1) after 75 *** to the measurement of mechanical properties,it is found that iron selenide composite also exhibits robust and elastic solid electrolyte interphase layer in ether-based electrolyte,contributing to the improvement in reversibility and stability for *** further investigate the electrochemical enhancement mechanism of ether-based electrolyte in KIBs,we also utilize in situ visualization technique to monitor the potassiation–depotassiation *** comparison,iron selenide composite matching carbonate-based electrolyte presents vast morphology change during potassiation–depotassiation *** changing to ether-based electrolyte,a few minor morphology changes can be *** phenomenon indicates an occurrence of homogeneous electrochemical reaction in ether-based electrolyte,which results in a stable performance for potassium-ion(K-ion)*** believe that our work will provide a new perspective to visually monitor the potassium-ion storage process and guide the improvement in electrode material performance.

关键词： Iron selenide ether-based electrolyte In situ visualization technique Potassium-ion batteries

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Achieving long-cycling sodium-ion full cells in ether-based electrolyte with vinylene carbonate additive

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Journal of Energy Chemistry 2021年第6期30卷 650-655,I0016页

作者： Juan Shi Lina Ding Yanhua Wan Liwei Mi Linjie Chen Dan Yang Yuxiong Hu Weihua Chen Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001HenanChina Henan Key Laboratory of Functional Salt Materials Center of Advanced Materials ResearchZhongyuan University of TechnologyZhengzhou 450007HenanChina College of Pharmacy Zhengzhou UniversityZhengzhou 450001HenanChina

Application of sodium-ion batteries is suppressed due to the lack of appropriate electrolytes matching cathode and anode ***-based electrolytes,preference of anode materials,cannot match with high-potential cathodes failing to apply in full ***,vinylene carbonate(VC)as an additive into NaCF_(3) SO_(3)-Diglyme(DGM)could make sodium-ion full cells applicable without preactivation of cathode and *** assembled FeS@C||Na3 V2(PO_(4))_(3)@C full cell with this electrolyte exhibits long term cycling stability and high capacity *** deduced reason is additive VC,whose HOMO level value is close to that of DGM,not only change the solvent sheath structure of Na^(+),but also is synergistically oxidized with DGM to form integrity and consecutive cathode electrolyte interphase on Na3 V2(PO_(4))_(3)@C cathode,which could effectively improve the oxidative stability of electrolyte and prevent the electrolyte *** work displays a new way to optimize the sodium-ion full cell seasily with bright practical application potential.

关键词： Cathode electrolyte interphase Sodium-ion batteries Full cell ether-based electrolyte Vinylene carbonate DFT calculation

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Innovative discontinuous-SEI constructed in ether-based electrolyte to maximize the capacity of hard carbon anode

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Journal of Energy Chemistry 2023年第4期79卷 459-467页

作者： Fanghong Zeng Lidan Xing Wenguang Zhang Zhangyating Xie Mingzhu Liu Xiaoyan Lin Guangxia Tang Changyong Mo Weishan Li Engineering Research Center of MTEES(Ministry of Education) Research Center of BMET(Guangdong Province)Engineering Lab.of OFMHEB(Guangdong Province)Key Lab.of ETESPG(GHEI)and Innovative Platform for ITBMD(Guangzhou Municipality)School of ChemistrySouth China Normal UniversityGuangzhou 510006GuangdongChina

Compared with graphite,the lower sodiation potential and larger discharge capacity of hard carbon(HC)makes it the most promising anode material for sodium-ion *** ether-based electrolyte rather than conventional carbonate-based electrolyte,HC achieves superior electrochemical ***,the mechanism by which ether-based electrolyte improves the properties of HC is still controversial,primarily focusing on whether it forms solid electrolyte interphase(SEI)*** this work,according to the sodium storage mechanisms in HC at low voltage(ether-based electrolyte was regulated,so as to construct a discontinuous-SEI on the surface of the HC anode,which significantly enhances the electrochemical performances of ***,with 0.2 M NaPF6ether-based electrolyte,HC deliverers a discharge capacity of 459.7 mA h g^(-1)at 0.1 C and stays at 357.2 mA h g^(-1)after 500 cycles at 1 C,which is substantially higher than that of higher/lower salt concentration electrolytes.

关键词： Sodium ion battery Hard carbon ether-based electrolyte SEI/SEI-free

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Anthraquinone derivative as high-performance anode material for sodium-ion batteries using ether-based electrolytes

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Green Energy & Environment 2018年第1期3卷 63-70页

作者： Linqin Mu Yaxiang Lu Xiaoyan Wu Yuejun Ding Yong-Sheng Hu Hong Li Liquan Chen Xuejie Huang Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesSchool of Physical Sciences University of Chinese Academy of Sciences

Organic materials, especially the carbonyl compounds, are promising anode materials for room temperature sodium-ion batteries owing to their high reversible capacity, structural diversity as well as eco-friendly synthesis from bio-mass. Herein, we report a novel anthraquinone derivative, C_(14)H_6 O_4 Na_2 composited with carbon nanotube(C_(14)H_6 O_4 Na_2-CNT), used as an anode material for sodium-ion batteries in etherbased electrolyte. The C_(14)H_6 O_4 Na_2-CNT electrode delivers a reversible capacity of 173 mAh g^(-1) and an ultra-high initial Coulombic efficiency of 98% at the rate of 0.1 C. The capacity retention is 82% after 50 cycles at 0.2 C and a good rate capability is displayed at 2 ***, the average Na insertion voltage of 1.27 V vs. Na^+/Na makes it a unique and safety battery material, which would avoid Na plating and formation of solid electrolyte interface. Our contribution provides new insights for designing developed organic anode materials with high initial Coulombic efficiency and improved safety capability for sodium-ion batteries.

关键词： Anthraquinone C14H6O4Na2-CNT Anode material ether-based electrolyte Sodium-ion batteries

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Recent progress in ether-based electrolytes for high-voltage lithium metal batteries

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Transactions of Nonferrous Metals Society of China 2024年第11期34卷 3452-3470页

作者： Hai-peng ZHU Qiang-feng ZHANG Zhao CHEN Zi-yu PENG Lin MEI Chun-xiao ZHANG Wei-feng WEI State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

ether-based solvents generally show better affinity for lithium metal,and thus ether-based electrolytes(EBEs)are more inclined to form a uniform and thin solid electrolyte interface(SEI),ensuring the long cycle stability of the lithium metal batteries(LMBs).Nonetheless,EBEs still face the challenge of oxidative decomposition under high voltage,which will corrode the structure of cathodes,destroy the stability of the electrode−electrolyte interface,and even cause safety ***,the types and challenges of EBEs are reviewed,the strategies for improving the high voltage stability of EBEs and constructing stable electrode−electrolyte interfaces are discussed in ***,the future perspectives and potential directions for composition optimization of EBEs and electrolyte−electrode interface regulation of high-voltage LMBs are explored.

关键词： ether-based electrolyte lithium metal batteries high voltage solvation structure electrode−electrolyte interfaces

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Utilizing the full capacity of carbon black as anode for Na-ion batteries via solvent co-intercalation

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Nano Research 2017年第12期10卷 4378-4387页

作者： Wei Xiao Qian Sun Jian Liu Biwei Xiao Per-Anders Glans Jun Li Ruying Li Jinghua Guo Wanli Yang Tsun-Kong Sham Xueliang Sun Department of Mechanical & Materials Engineering University of Western Ontario London Ontario N6ASB9 Canada Department of Chemistry University of Western Ontario London Ontario N6ASB7 Canada Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 USA

Carbonaceous materials have long been considered promising anode materials for Na-ion batteries. However, the electrochemical performance of conventional carbon anodes is generally poor because the sodium ion storage solely relies on the disordered region of the carbon materials in a carbonate-based electrolyte. The solvent co-intercalation mechanism for Na ions has been recently reported in natural graphite anodes for Na-ion batteries with ether-based electrolytes, but their capacities are still unsatisfactory. We show here for the first time that by combining regular Na ion storage in the disordered carbon layer and solvent co-intercalation mechanism in the graphitized layer of a commercial N330 carbon black as an anode material for Na-ion batteries in ether-based electrolyte, the reversible capacity could be fully realized and doubled in magnitude. This unique sodium intercalation process resulted in a significantly improved electrochemical performance for the N330 electrode with an initial reversible capacity of 234 mAh.g-1 at 50 mA.g-1 and a superior rate capability of 105 mAh.g-1 at 3,200 mA-g-1. When cycled at 3,200 mA.g-1 over 2,000 cycles, the electrode still exhibited a highly reversible capacity of 72 mAh.g-1 with a negligible capacity loss per cycle （0.0167%）. Additionally, surface-sensitive C K-edge X-ray absorption spectroscopy, with the assistance of electrochemical and physicochemical characterizations, helped in identifying the controlled formation and evolution of a thin and robust solid electrolyte interphase film. This film not only reduced the resistance for sodium ion diffusion, but also maintained the structural stability of the electrode for extended cycle reversibility. The superior electrochemical performance of N330 carbon black strongly demonstrated the potential of applying ether-based electrolytes for a wide range of carbon anodes apart from natural graphite.

关键词： carbon black anode sodium-ion batteries ether-based electrolyte co-intercalation

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Interface Engineering of Fe_(7)S_(8)/FeS_(2) Heterostructure in situ Encapsulated into Nitrogen‑Doped Carbon Nanotubes for High Power Sodium‑Ion Batteries

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Nano-Micro Letters 2023年第8期15卷 167-180页

作者： Penghao Song Jian Yang Chengyin Wang Tianyi Wang Hong Gao Guoxiu Wang Jiabao Li College of Chemistry and Chemical Engineering Yangzhou University180 Si‑Wang‑Ting RoadYangzhou 225002JiangsuPeople’s Republic of China Centre for Clean Energy Technology Faculty of ScienceUniversity of Technology SydneyPO Box 123BroadwayNSW 2007Australia Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022People’s Republic of China

Heterostructure engineering combined with carbonaceous materials shows great promise toward promoting sluggish kinetics,improving electronic conductivity,and mitigating the huge expansion of transition metal sulfide electrodes for high-performance sodium ***,the iron sulfide-based heterostructures in situ hybridized with nitrogen-doped carbon nanotubes(Fe_(7)S_(8)/FeS_(2)/NCNT)have been prepared through a successive pyrolysis and sulfidation *** Fe_(7)S_(8)/FeS_(2)/NCNT heterostructure delivered a high reversible capacity of 403.2 mAh g^(−1) up to 100 cycles at 1.0 A g^(−1) and superior rate capability(273.4 mAh g^(−1) at 20.0 A g^(−1))in ester-based ***,the electrodes also demonstrated long-term cycling stability(466.7 mAh g^(−1) after 1,000 cycles at 5.0 A g^(−1))and outstanding rate capability(536.5 mAh g^(−1) at 20.0 A g^(−1))in ether-based *** outstanding performance could be mainly attributed to the fast sodium-ion diffusion kinetics,high capacitive contribution,and convenient interfacial dynamics in ether-based electrolyte.

关键词： Iron sulfides Heterostructure Nitrogen-doped carbon nanotubes Ester-based electrolyte ether-based electrolyte

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