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P2-type Na_(0.6)[Mg(Ⅱ)_(0.3)Mn(Ⅳ)_(0.7)]O_2 as a new model material for anionic redox reaction

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Chinese Chemical Letters 2018年第12期29卷 1791-1794页

作者： Xiaohui Rong Fei Gao yaxiang lu Kai Yang Yongsheng Hu State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences

A new model material of Na[Mg(Ⅱ)Mn(Ⅳ)]O, with only Mgand Mnin the transition metal layers, is synthesized for the research of anionic redox reaction. The material delivers a capacity of ～130 mAh/g with a long plateau at ～4.2 V in the initial charge profile, indicating anionic redox reaction(ARR) involved during the initial desodiation process. In the following cycles, the reversible capacity can reach a high value of ～210 mAh/g, which is probably derived from the participation of both ARR and Mn/Mnredox couples, further proving the charge compensation from ARR during the initial charge and following cycles. The designed cathode material without Mnhelps avoid the influence of oxygen activity from transition metals, enabling the investigation of ARR without other distractions.

关键词： Na-ion batteries Layered oxide Cathode Anionic redox reaction Na_(0.6)[Mg_(0.3)Mn_(0.7)]O_2

Flexible Na batteries

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InfoMat 2020年第1期2卷 126-138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 SciencesBeijingChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina Yangtze River Delta Physics Research Center Co.Ltd LiyangChina

Flexible energy storage devices have gained significant attention because of the increasing needs of bendable displays,wearable electronics,and flexible *** Na-based rechargeable batteries are the promising power sources in such products due to their low cost and wide *** this review,we firstly introduce the structural superiority of flexible Na-based batteries and summarize their main components including cathodes,electrolytes,and ***,fabrication of their flexible components is discussed in detail,with specific emphasis on material selection,particularly for solid-state *** is followed by an overview highlighting recent progress in the development of prototypes of flexible Na-ion batteries and ***,perspectives on future challenges for the development of flexible Na batteries are proposed.

关键词： anode cathode electrolyte flexible device Na battery

Anionic redox reaction mechanism in Na-ion batteries

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Chinese Physics B 2022年第9期31卷 95-102页

作者： Xueyan Hou Xiaohui Rong yaxiang lu 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 100190China

Na-ion batteries(NIBs),as one of the next-generation rechargeable battery systems,hold great potential in large-scale energy storage applications owing to the abundance and costeffectiveness of sodium *** the extensive exploration of electrode materials,the relatively low attainable capacity of NIBs hinders their practical *** recent years,the anionic redox reaction(ARR)in NIBs has been emerging as a new paradigm to deliver extra capacity and thus offers an opportunity to break through the intrinsic energy density *** this review,the fundamental investigation of the ARR mechanism and the latest exploration of cathode materials are summarized,in order to highlight the significance of reversible anionic redox and suggest prospective developing directions.

关键词： energy storage Na-ion battery anionic redox reaction

High-temperature treatment induced carbon anode with ultrahigh Na storage capacity at low-voltage plateau

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Science Bulletin 2018年第17期63卷 1125-1129页

作者： Chenglong Zhao Qidi Wang yaxiang lu Baohua Li Liquan Chen Yong-Sheng Hu Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China Division of Energy and Environment Engineering Laboratory for the Next Generation Power and Energy Storage Batteries Graduate School at Shenzhen Tsinghua Universty Shenzhen 518055 Chino School of Materials Science and Engineering Tsinghua University Beijing 100084 China

Sodium-ion batteries （NIBs） show great prospect on the energy storage applications benefiting from thei low cost and the abundant Na resources despite the expected lower energy density compared wit lithium-ion batteries （LIBs）. To further enhance the competitive advantage, especially in energy densit3 developing the high-capacity carbon anode materials can be one of the effective approaches to realiz this goal. Herein, we report a novel carbon anode made from charcoal with a high capacity of ~400 Ah g i, wherein about 85% （〉330 mAh g^-1） of its total capacity is derived from the long plateau regio below ~0.1 V. which differs fiom those of typical hard carbon materials （~300 mAh g^-l） in NIBs but i similar to the graphite anode in LIBs. When coupled with air-stable ***.22Feo.3oMno.4802 oxid cathode, a high-energy density of ~240 Wh kg^-1 is achieved with good rate capability and cyclin stability. The discovery of this promising carbon anode is expected to further improve the energy densit of NIBs towards large-scale electrical energy storage.

关键词： Sodium-ion battery Na storage Hard carbon Charcoal High-temperature carbonization Low-voltage plateau

Recent Progress in Presodiation Technique for High-Performance Na-Ion Batteries

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Chinese Physics Letters 2021年第11期38卷 83-90页

作者： Fei Xie 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

Na-ion batteries(NIBs) have been attracting growing interests in recent years with the increasing demand of energy storage owing to their dependence on more abundant Na than Li. The exploration of the industrialization of NIBs is also on the march, where some challenges are still limiting its step. For instance, the relatively low initial Coulombic efficiency(ICE) of anode can cause undesired energy density loss in the full cell. In addition to the strategies from the sight of materials design that to improve the capacity and ICE of electrodes, presodiation technique is another important method to efficiently offset the irreversible capacity and enhance the energy density. Meanwhile, the slow release of the extra Na during the cycling is able to improve the cycling *** this review, we would like to provide a general insight of presodiation technique for high-performance *** recent research progress including the principles and strategies of presodiation will be introduced, and some remaining challenges as well as our perspectives will be discussed. This review aims to exhibit the basic knowledge of presodiation to inspire the researchers for future studies.

关键词： Recent Progress in Presodiation Technique for High-Performance Na-Ion Batteries

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： Yuqi Li 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 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 *** 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 *** 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

Disordered carbon anodes for Na-ion batteries—quo vadis?

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Science China Chemistry 2021年第10期64卷 1679-1692页

作者： Fei Xie Zhen Xu Zhenyu Guo yaxiang lu Liquan Chen Maria-Magdalena Titirici 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 Department of Chemical Engineering Imperial College LondonLondon SW72AZUK

Na-ion batteries(NIBs)are gradually attracting much attention as an alternative to lead-acid batteries and supplement to Li-ion batteries(LIBs)owing to the abundant Na resources and excellent *** the most commonly used graphite as an anode material in LIBs cannot be inherently used in NIBs,tremendous efforts have been made to advance the fundamental understanding and design of suitable anode materials for NIBs,including the improvement of Na storage capacity and the study on Na storage *** to all these studies,disordered carbons are now the most promising anode candidates for *** this review,we discuss the current challenges and remaining problems to be solved in the area of disordered carbon anode materials for NIBs and provide future insights and research directions.

关键词： disordered carbon anode Na-ion batteries

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Mg-doped layered oxide cathode for Na-ion batteries

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Chinese Physics B 2022年第6期31卷 125-131页

作者： Yuejun Ding Feixiang Ding Xiaohui Rong yaxiang lu 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 Sciences Beijing 100190China

Na-ion batteries(NIBs)are regarding as the optimum complement for Li-ion batteries along with the rapid development of stationary energy storage *** order to meet the commercial demands of cathodes for NIBs,O3-type Cu containing layered oxide Na_(0.9)0Cu_(0.22)Fe_(0.30)Mn_(0.48O_(2))with good comprehensive performance and low-cost element components is very promising for the practical ***,only part of the Cu^(3+)/Cu^(2+)redox couple participated in the redox reaction,thus impairing the specific capacity of the cathode ***,Mg2+-doped O3-Na0.90Mg0.08Cu0.22Fe0.30Mn0.40O_(2)layered oxide without Mn3+was synthesized successfully,which exhibited improved reversible specific capacity of 118 mAh/g in the voltage range of 2.4-4.0 V at 0.2 C,corresponding to the intercalation/deintercalation of 0.47 Na+(0.1 more than that of Na_(0.9)0Cu_(0.22)Fe_(0.30)Mn_(0.48O_(2))).This work demonstrates an important strategy to obtain advanced layered oxide cathodes for NIBs.

关键词： copper redox layered oxide cathode Na-ion batteries energy storage

Unlocking the multi-electron transfer reaction in NASICON-type cathode materials

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Materials Futures 2023年第2期2卷 109-122页

作者： Yuan Liu Xiaohui Rong Fei Xie yaxiang lu Junmei Zhao Liquan Chen Yong-Sheng Hu Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190People’s Republic of China College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Yangtze River Delta Physics Research Center Co.Ltd Liyang 213300People’s Republic of China Huairou Division Institute of PhysicsChinese Academy of SciencesBeijing 101400People’s Republic of China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Biochemical EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijingPeople’s Republic of China

The growing concern about scarcity and large-scale applications of lithium resources has attracted efforts to realize cost-effective phosphate-based cathode materials for next-generation Na-ion batteries(NIBs).In previous work,a series of materials(such as Na_(4)Fe_(3)(PO_(4))_(2)(P_(2)O_(7)),Na_(3)VCr(PO_(4))_(3),Na_(4)VMn(PO_(4))3,Na_(3)MnTi(PO_(4))_(3),Na_(3)MnZr(PO_(4))3,etc)with∼120 mAh g^(-1) specific capacity and high operating potential has been ***,the mass ratio of the total transition metal in the above compounds is only∼22 wt%,which means that one-electron transfer for each transition metal shows a limited capacity(the mass ratio of Fe is 35.4 wt%in LiFePO_(4)).Therefore,a multi-electron transfer reaction is necessary to catch up to or go beyond the electrochemical performance of LiFePO_(4).This review summarizes the reported NASICON-type and other phosphate-based cathode *** the basis of the aforementioned experimental results,we pinpoint the multi-electron behavior of transition metals and shed light on designing rules for developing high-capacity cathodes in NIBs.

关键词： NASICON Na-ion batteries cathode materials multi-electron transfer reactions