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High-Performance na-ion Storage of S-Doped Porous Carbon Derived from Conjugated Microporous Polymers

nano-Micro Letters 2019年第4期11卷 84-96页

作者： Yuquan Li Bin Ni Xiaodan Li Xianghui Wang Dafeng Zhang Qingfei Zhao Jinliang Li Ting Lu Wenjie Mai Likun Pan Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal University3663 N.Zhongshan Rd.Shanghai 200062People’s Republic of China Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632GuangdongPeople’s Republic of China School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000ShandongPeople’s Republic of China Department of Chemical Engineering School of Environmental and Chemical EngineeringShanghai University99 Shangda RoadShanghai 200444People’s Republic of China Testing and Analysis Centre College of Chemistry and Materials ScienceShanghai Normal University100 Guilin RoadShanghai 200234People’s Republic of China

na-ion batteries(NIBs)have attracted considerable attention in recent years owing to the high abundance and low cost of na.It is well known that S doping can improve the electrochemical performance of carbon materials for NIBs.However,the current methods for S doping in carbons normally involve toxic precursors or rigorous conditions.In this work,we report a creative and facile strategy for preparing S-doped porous carbons(SCs)via the pyrolysis of conjugated microporous polymers(CMPs).Briefly,thiophene-based CMPs served as the precursors and doping sources simultaneously.Simple direct carbonization of CMPs produced S-doped carbon materials with highly porous structures.When used as an anode for NIBs,the SCs exhibited a high reversible capacity of 440 mAh g?1 at 50 mA g?1 after 100 cycles,superior rate capability,and excellent cycling stability(297 mAh g?1 after 1000 cycles at 500 mA g?1),outperforming most S-doped carbon materials reported thus far.The excellent performance of the SCs is attributed to the expanded lattice distance after S doping.Furthermore,we employed ex situ X-ray photoelectron spectroscopy to investigate the electrochemical reaction mechanism of the SCs during sodiation-desodiation,which can highlight the role of doped S for na-ion storage.

关键词： Conjugated microporous polymer S-doped porous carbons na-ion batteries Reaction mechanism

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Ni-based cathode materials for na-ion batteries

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nano Research 2019年第9期12卷 2018-2030页

作者： Chenglong Zhao Yaxiang Lu Liquan Chen Yong-Sheng Hu Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Yangtze River Delta Physics Research Center Co. Ltd Liyang 213300China

na-ion batteries(NIBs)have attracted significant attention owing to na being an abundant resource that is uniformly distributed in the Earth's crust.Several 3d transition metal(TM)ions have been thoroughly investigated as charge compensators in single or multiple composition systems to enhance the electrochemical performance of cathodes for the practical applications.In this review,the composition-structure-property relationship of Ni-based cathodes has been reviewed as a design perspective for NIB'S cathodes.The typical Ni-based cathode materials have bee n systematically summarized and comparatively analyzed,and it is dem on strated that Ni io ns can be used to provide charge compensation.Moreover,Ni-based cathodes present high reversible capacity owing to the multi-electron redox reactions and suitable redox pote ntial of Ni-ions redox.However,con sidering the abundan ce,cost,and hygroscopic properties of Ni eleme nt,the content of 0.15-0.35 per formula can be optimal for enhancing the performance of cathodes.Lastly,further perspectives on designing Ni?containing cathodes,including Ni-rich layered cathodes,have been discussed,which could promote the practical applications of NIBs for grid-scale energy storage in future.

关键词： na-ion battery Ni-based cathode Ni27Ni^3+/Ni^4+ charge compensation high specific capacity

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Recent advances on flexible electrodes for na-ion batteries and Li–S batteries

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Journal of Energy Chemistry 2019年第5期28卷 15-44页

作者： Mohammed-Ibrahim Jamesh Department of Physics and Materials Science City University of Hong Kong Applied and Plasma Physics School of Physics (A28) University of Sydney CSIR-Central Electrochemical Research Institute-Chennai Unit CSIR Madras Complex

Flexible energy storage devices are essential for emerging flexible electronics. The existing state-of-the-art Li-ion batteries are slowly reaching their limitation in terms of cost and energy density. Hence, flexible na-ion batteries (SIBs) with abundanee na resources and Li-S batteries with high energy density become the alternative for the Li-ion batteries in future. This review summarizes the recent advances in the development of flexible electrode materials for SIBs with metallic matrix and carb on aceous matrix such as carb on nano-tubes, carbon nano-fiber, graphene, carbon cloth, carbon fiber cloth, and cotton textiles. Then, the potential prototype flexible full SIBs are discussed. Further, the recent progress in the development of flexible electrode materials for Li-S batteries based on carb on nano-fiber, carb on nano-tubes, graphene, and cotton textiles is reviewed. Moreover, the design strategies of suitable interlayer, separator, electrolyte, and electrodes to prevent the dissolution and shuttle effect of polysulfides in flexible Li-S batteries are provided. Finally some prospective investigation trends towards future research of flexible SIBs and Li-S batteries are also proposed and discussed. The scientific and engineering knowledge gained on flexible SIBs and Li-S batteries provides conceivable development for practical application in near future.

关键词： na-ion batteries Lithium-sulfur batteries Flexible Free-standing High performance energy storage Long cycle life

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Degradation mechanism of tin phosphide as na-ion battery negative electrode

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Green Energy & Environment 2019年第2期4卷 121-126页

作者： Hiroyuki Usui Yasuhiro Domi Ryota Yamagami Hiroki Sakaguchi Department of Chemistry and Biotechnology Graduate School of Engineering Tottori University Center for Research on Green Sustainable Chemistry Tottori University Course of Chemistry and Biotechnology Department of Engineering Graduate School of Sustainability Science Tottori University

The degradation mechanism of an Sn_4P_3 electrode as na-ion battery anode was investigated by using a transmission electron microscopic observation. At the first desodiation, we confirmed that Sn nanoparticles with 6 nm in size were dispersed in an amorphous-like P matrix.Compared to this, we observed aggregated Sn particles with sizes exceeding 50 nm after the drastic capacity fading. The capacity fading mechanism was for the first time confirmed to be Sn aggregation. To improve the capacity decay, we carried out the two kinds of chargeàdischarge cycling tests under the reduced volume changes of Sn particles and P matrix by limiting desodiation reactions of nae Sn and na3P, respectively. The Sn_4P_3 electrode exhibited an excellent cyclability with the discharge capacity of 500 mA hg^(-1) for 420 cycles under the limited desodiation, whereas the capacity decay was accelerated under the limited sodiation. The results suggest that the Sn aggregation can be improved by the reduced volume change of the P matrix, and that it is very effective for improving anode performance of Sn_4P_3 electrode.

关键词： Tin phosphide(Sn4P3) ionic liquid electrolyte na-ion battery Negative electrode material nanostructure

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Hard carbon derived from rice husk as low cost negative electrodes in na-ion batteries

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Journal of Energy Chemistry 2019年第2期28卷 17-22页

作者： Maria K.Rybarczyk Yunming Li Mo Qiao Yong-Sheng Hu Maria-Magdalena Titirici Marek Lieder Gdansk University of Technology Chemical Faculty Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesNational Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of Sciences Queen Mary University London School of Materials Science & Engineering

Here,we report the synthesis of hard carbon materials(RH) made from natural rice husk through a single pyrolysis process and their application as an anode in sodium-ion batteries.The studies show that the electrochemical properties of RHs are affected by the treatment temperatures,which determine the materials morphology,in particular,their degree of graphitization and extent of continuous channels(nanovoids).The latter are accessible to sodium ions and significantly contribute to charge storage capacity of the produced anodes.The RHs obtained at 1600 °C deliver the highest reversible capacity of276 mAh g^(-1) mainly due to insertion of sodium ions into the nanovoids.This work deepens the basic understanding of the influence of the carbonization temperature on the sodium storage mechanism.

关键词： nanovoids in rice husk Sustainable energy storage na-ion batteries

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P2-type na0.67Co0.35Ti0.20Mn0.44La0.01O2 cathode material with high-rate capability for sodium-ion batteries

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Journal of Rare Earths 2019年第12期37卷 1296-1304页

作者： Jiantao Tang Yanzhi Wang Yanhong Li Jiabin Zhao Lijun Wang Xiduo Yang Hebei Key Laboratory of Applied Chemistry College of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Material Science and Technology Yanshan UniversityQinhuangdao 066004China

The substitution of elements has attracted great interest to enhance the electrochemical properties of sodium-ion batteries(SIBs).Herein,the P2-na0.67Co0.35Ti0.20Mn0.45-xLaxO2 electrode samples were prepared via a solid-state route.The effect of La3+substitution was researched as high-rate SIBs cathode.The na0.67Co0.35Ti0.20Mn0.44La0.01O2 exhibits a superior initial specific capacity of 162.7 and 125.9 mA h/g after50 cycles at 0.1 C rate,and the initial specific discharge capacity of 115.2 mA h/g with 60.6%capacity retention after 100 cycles at 1 C In addition,the na0.67Co0.35Ti0.20Mn0.44La0.01O2 sample shows an excellent rate capacity of 91.9 and 60.4 mA·h/g with 46.9%and 50.9%capacity retentions even at 8 C and 10 C rate after100 cycles,respectively.The promising La-substituted P2-type na0.67Co0.35Ti0.20Mn0.45-xLaxO2 material provides a new strategy for designing high-rate performance of SIBs.

关键词： na-ion batteries Cathode P2-type oxides La substitution High-performance

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Failure analysis with a focus on thermal aspect towards developing safer na-ion batteries

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Chinese Physics B 2020年第4期29卷 41-48页

作者：李钰琦陆雅翔陈立泉胡勇胜 Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Yangtze River Delta Physics Research Center Co.Ltd Liyang 213300China

Safety requirements stimulate na-based batteries to evolve from high-temperature na–S batteries to room-temperature na-ion batteries(NIBs).Even so,NIBs may still cause thermal runaway due to the external unexpected accidents and internal high activity of electrodes or electrolytes,which has not been comprehensively summarized yet.In this review,we summarize the significant advances about the failure mechanisms and related strategies to build safer NIBs from the selection of electrodes,electrolytes and the construction of electrode/electrolyte interfaces.Considering the safety risk,the thermal behaviors are emphasized which will deepen the understanding of thermal stability of different NIBs and accelerate the exploitation of safe NIBs.

关键词： na-ion batteries safety issue electrodes electrolytes solid electrolyte interphase thermal runaway failure analysis

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Hard carbons derived from pine nut shells as anode materials for na-ion batteries

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Chinese Physics B 2019年第6期28卷 32-37页

作者：郭浩孙凯陆雅翔王洪亮马小柏李正耀胡勇胜陈东风 China Institute of Atomic Energy Beijing 102413China Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China

Hard carbons as promising anode materials for na-ion batteries(NIBs) have captured extensive attention because of their low operation voltage, easy synthesis process, and competitive specific capacity. However, there are still several disadvantages, such as high cost and low initial coulombic efficiency, which limit their large-scale commercial applications.Herein, pine nut shells(PNSs), a low-cost biomass waste, are used as precursors to prepare hard carbon materials. Via a series of washing and heat treatment procedures, a pine nut shell hard carbon(PNSHC)-1400 sample has been obtained and delivers a reversible capacity of around 300 mAh/g, a high initial coulombic efficiency of 84%, and good cycling performance. These excellent na storage properties indicate that PNSHC is one of the most promising candidates of hard carbon anodes for NIBs.

关键词： na-ion battery anode hard carbon pine nut shells

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