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Extending the solid solution range of sodium ferric pyrophosphate:Off‐stoichiometric Na_(3)Fe(2.5)(P_(2)O_(7))_(2)as a novel cathode for sodium‐ion batteries

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Carbon Energy 2024年第4期6卷 128-139页

作者： Xiang jun Pu Kunran Yang Zibing Pan Chunhua Song Yangyang Lai Renjie Li Zheng‐Long Xu Zhongxue Chen yuliang cao Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry and Molecular SciencesWuhan UniversityWuhanChina Key Laboratory of Hydraulic Machinery Transients Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhanChina School of Chemistry and Chemical Engineering Jiangsu University of TechnologyChangzhouJiangsuChina Zonergy Corporation ZigongSichuanChina Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHung HomHong Kong SARChina

Iron‐based pyrophosphates are attractive cathodes for sodium‐ion batteries due to their large framework,cost‐effectiveness,and high energy ***,the understanding of the crystal structure is scarce and only a limited candidates have been reported so *** this work,we found for the first time that a continuous solid solution,Na_(4−α)Fe_(2+α)_(2)(P_(2)O_(7))_(2)(0≤α≤1,could be obtained by mutual substitution of cations at center‐symmetric Na3 and Na4 sites while keeping the crystal building blocks of anionic P_(2)O_(7) *** particular,a novel off‐stoichiometric Na_(3)Fe(2.5)(P_(2)O_(7))_(2)is thus proposed,and its structure,energy storage mechanism,and electrochemical performance are extensively investigated to unveil the structure–function *** as‐prepared off‐stoichiometric electrode delivers appealing performance with a reversible discharge capacity of 83 mAh g^(−1),a working voltage of 2.9 V(***^(+)/Na),the retention of 89.2%of the initial capacity after 500 cycles,and enhanced rate capability of 51 mAh g^(−1)at a current density of 1600 mA g^(−1).This research shows that sodium ferric pyrophosphate could form extended solid solution composition and promising phase is concealed in the range of Na_(4−α)Fe_(2+α)_(2)(P_(2)O_(7))_(2),offering more chances for exploration of new cathode materials for the construction of high‐performance SIBs.

关键词： extending solid‐solution range off‐stoichiometric Na_(3)Fe_(2.5)(P_(2)O_(7))_(2) sodium‐ion batteries structure-function relationship

A high-loading and cycle-stable solid-phase conversion sulfur cathode using edible fungus slag-derived microporous carbon as sulfur host

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Nano Research 2023年第6期16卷 8360-8367页

作者： Hui Li Xiangjiang Wu Sijie Jiang Qian Zhang yuliang cao Hanxi Yang Feifei cao Xinping Ai Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry&Molecular ScienceWuhan UniversityWuhan 430072China College of Science Huazhong Agricultural UniversityWuhan 430070China

Developing a high sulfur(S)-loading cathode with high capacity utilization and long term cyclability is a key challenge for commercial implementation of Li-S battery *** overcome this challenge,we propose a solid-phase conversion sulfur cathode by using an edible fungus slag-derived porous carbon(CFS)as sulfur host to fabricate the S/CFS composite and meanwhile,utilizing the vinyl carbonate(VC)as co-solvent of the ether-based electrolyte to in-situ form a protective layer on the S/CFS composite surface through its nucleophilic reaction with the freshly generated lithium polysulfides(LiPSs)at the very beginning of initial discharge,thus isolating the interior sulfur from the outer electrolyte and inhibiting the further generation of soluble *** from the ultrahigh specific surface area of>3,000 m^(2)·g^(−1),ideal pore size of2.0 cm^(3)·g^(−1)of the CFS host matrix,the S/CFS cathode even with a high S-loading of 80 wt.%(based on the weight of S/CFS composite)can still operate in a solid-phase conversion manner in the VC-ether co-solvent electrolyte to exhibit a high reversible capacity of 1,557 mAh·g^(−1),a high rate capability with 50%remaining capacity at 2 A·g^(−1)and a high cycling efficiency of 99.9%over 500 *** results presented in this work suggest that a combined action of solid-phase conversion electrochemistry and nanoarchitectured host structure may provide a new path for the design and development of practical lithium-sulfur batteries.

关键词： lithium-sulfur batteries solid-phase conversion high sulfur loading cathode edible fungus slag-derived carbon nucleophilic reaction

Understanding of the sodium storage mechanism in hard carbon anodes

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Carbon Energy 2022年第6期4卷 1133-1150页

作者： Xiaoyang Chen Changyu Liu Yongjin Fang Xinping Ai Faping Zhong Hanxi Yang yuliang cao Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry and Molecular SciencesWuhan UniversityWuhanChina Shenzhen National Engineering Research Center of Advanced Energy Storage Materials ShenzhenChina

Hard carbon has been regarded as the most promising anode material for sodiumion batteries(SIBs)due to its low cost,high reversible capacity,and low working ***,the uncertain sodium storage mechanism hinders the rational design and synthesis of high-performance hard carbon anode materials for practical *** the past decades,tremendous efforts have been put to stimulate the development of hard carbon *** this review,we discuss the recent progress of the study on the sodium storage mechanism of hard carbon anodes,and the effective strategies to improve their sodium storage performance have been *** is anticipated that hard carbon anodes with high electrochemical properties will be inspired and fabricated for large-scale energy storage applications.

关键词： anode electrochemical energy storage hard carbon sodium-ion batteries sodium storage mechanism

基于活性炭‖Na_(0.44)MnO_(2)的低成本、高倍率和长寿命碱性钠离子电池电容器

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物理化学学报 2024年第2期40卷 87-88页

作者：薛晴李圣驿赵亚楠盛鹏徐丽李正曦张波李慧王博杨立滨曹余良陈重学北京智慧能源研究院北京102200 武汉大学化学与分子科学学院化学电源材料与技术湖北省重点实验室武汉430072 国网青海省电力公司经济技术研究院西宁810008 国网金华供电公司浙江金华321017 武汉大学动力与机械学院水力机械过渡过程教育部重点实验室武汉430072

水系钠离子电池电容器具有成本低、功率大、安全性好等优点,是下一代大规模储能系统的理想选择之一。本文采用Na_(0.44)MnO_(2)正极、活性炭(AC)负极、6mol·L^(-1)NaOH电解液和廉价的不锈钢集流体构建了可充电碱性钠离子电池电容器。由... 详细信息

水系钠离子电池电容器具有成本低、功率大、安全性好等优点,是下一代大规模储能系统的理想选择之一。本文采用Na_(0.44)MnO_(2)正极、活性炭(AC)负极、6mol·L^(-1)NaOH电解液和廉价的不锈钢集流体构建了可充电碱性钠离子电池电容器。由于Na_(0.44)MnO_(2)正极在碱性电解液中具有较高的过充耐受性,通过首次充电时的原位过充预活化过程可以解决半钠化Na_(0.44)MnO_(2)正极和AC负极初始库伦效率低的缺点。因此,AC‖Na_(0.44)MnO_(2)可充电碱性钠离子电池电容器具有优异的电化学性能,在功率密度为85 W·kg^(-1)时,能量密度达26.6 Wh·kg^(-1),循环10000次后容量保持率为89%。同时,在50℃的高温和-20℃的低温也具有良好的电化学性能。这些结果表明AC‖Na_(0.44)MnO_(2)可充电碱性钠离子电池电容器具备应用于大规模储能的潜力。

关键词：钠离子电池电容碱性电解液过充自保护低成本宽工作温程

Advances of graphdiyne-supported metal catalysts in thermocatalytic reactions

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Nano Research 2024年第4期17卷 2223-2233页

作者： Jia Yu Yida Yang yuliang Li Changyan cao Weiguo Song Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular SciencesLaboratory of Molecular Nanostructures and NanotechnologyInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular SciencesLaboratory of organic solidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

Supported metal catalysts are widely used in the modern chemical *** electronic interaction between supports and active components is of great significance for heterogeneous ***(GDY),a new type of carbon allotrope with sp-hybridized carbon atoms,πconjugate structure,and electron transmission capability,is a promising candidate as catalyst *** years have witnessed the rapid progress of GDY-supported metal catalysts for different catalysis *** that most processes in the current chemical industry are thermocatalytic reactions,we herein give an overview about the advances and particular characteristics of GDY-supported catalysts in these *** geometric structure and electronic properties of GDY are first ***,the synthesis methods for GDY-supported metal catalysts and their applications in thermocatalytic reactions are discussed,in which the effect of electronic interaction on catalytic performance is ***,the current challenges and future directions of GDY-supported metal catalysts for thermocatalysis are *** is expected that this review will enrich our understanding of the advances of GDY as a superior support for metal catalysts in thermocatalytic reactions.

关键词： graphdiyne metal catalysts thermocatalytic reactions heterogeneous catalysis

Boosting the sodium storage performance of Prussian blue analogues via effective etching

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Science China Chemistry 2023年第11期66卷 3154-3160页

作者： Yanan Zhao Jian Peng Kean Chen Laibing Luo Hui Chen Hang Zhang Shulei Chou Xiangmin Feng Weihua Chen Ruoyu cao Xinping Ai Yongjin Fang yuliang cao Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry and Molecular SciencesWuhan UniversityWuhan 430072China Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongInnovation CampusSquires WayNorth Wollongong 2522Australia Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou 450001China

Prussian blue analogues(PBAs)have gained significant popularity as cathode materials for sodium-ion batteries(SIBs)due to their remarkable features such as high capacity and convenient ***,PBAs usually suffer from kinetic problems during the electrochemical reactions due to sluggish Na~+diffusion in the large crystals,resulting in low-capacity utilization and inferior rate *** this study,we present a facile etching method aiming at activating the sodium storage sites and accelerating the Na~+transport of Na_2NiFe(CN)_6(denoted as NaNiHCF)by precisely controlling its morphologies.A progressive corner passivation phenomenon occurred in NaNiHCF during the etching process,which led to a substantial augmentation of the specific surface area as the morphology transitioned from a standard cube to a dice ***,by controlling the etching time,the obtained NaNiHCF-3 electrode exhibited boosted electrochemical performance with high reversible capacity of 83.5mAh g~(-1)(98.2%of its theoretical capacity),superior rate capability(71.2 mAh g~(-1)at 10 C),and stable cycling life-span at different *** experimental and computational methods reveal the remarkably reversible structural evolution process and improved Na~+diffusion *** believe that this work can serve as an indispensable reference to tailor the structure of PBAs to obtain improved electrochemical performance.

关键词： Prussian blue analogues Na_2NiFe(CN)_6 cathode materials etching sodium-ion batteries

Boosting rate and cycling performance of K-doped Na_(3)V_(2)(PO_(4))_(2)F_(3) cathode for high-energy-density sodium-ion batteries

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Green Energy & Environment 2022年第6期7卷 1253-1262页

作者： Jiexin Zhang YangYang Lai Peng Li Yanxia Wang Faping Zhong Xiangming Feng Weihua Chen Jianjun Liu Xinping Ai Hanxi Yang yuliang cao Engineering Research Center of Organosilicon Compounds&Materials of Ministry of Education College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072China National Engineering Research Center of Advanced Energy Storage Materials Hunan410205China College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou450001China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of Sciences1295 Dingxi RoadShanghai200050China

As a promising cathode material,Na_(3)V_(2)(PO_(4))_(2)F_(3)(NVPF)has attracted wide attention for sodium-ion batteries(SIBs)because of its high operating voltage and high structural ***,the low intrinsic electronic conductivity and insufficient Na ion mobility of NVPF limit its ***,K-doping NVPF is prepared through a facile ball-milling combined calcination *** effects of K-doping on the crystal structure,kinetic properties and electrochemical performance are *** results demonstrate that the Na_(2.90)K_(0.10)V_(2)(PO_(4))_(3)F_(3)(K0.10-NVPF)exhibits a high capacity(120.8 mAh g^(-1) at 0.1 C),high rate capability(66 mAh g^(-1) at 30 C)and excellent cycling performance(a capacity retention of 97.5%at 1 C over 500 cycles).Also,the occupation site of K ions in the lattice,electronic band structure and Na-ion transport kinetic property in K-doped NVPF are investigated by density functional theory(DFT)calculations,which reveals that the K-doped NVPF exhibits improved electronic and ionic conductivities,and located K^(+) ions in the lattice to contribute to high reversible capacity,rate capability and cycling ***,the K-doped NVPF serves as a promising cathode material for high-energy and high-power SIBs.

关键词： Potassium doping Na_(3)V_(2)(PO_(4))_(2)F_(3) Cathode materials Sodium ion batteries Long-term stability

Mixed polyanion cathode materials:Toward stable and high-energy sodium-ion batteries

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Journal of Energy Chemistry 2021年第9期30卷 635-648页

作者： Along Zhao Yongjin Fang Xinping Ai Hanxi Yang yuliang cao Engineering Research Center of Organosilicon Compounds and Materials of Ministry of Education College of Chemistry and Molecular SciencesWuhan UniversityWuhan 430072HubeiChina

Sodium-ion batteries(SIBs)are considered as one of the most fascinating alternatives to lithium-ion batteries for grid-scale energy storage applications because of the low cost and wide abundance of sodium *** various cathode materials,mixed polyanion compounds come into the spotlight as promising electrode materials due to their superior electrochemical properties,such as high working voltage,long cycling stability,and facile reaction *** this review,we summarize the recent development in the exploration of different mixed polyanion cathode materials for *** provide a comprehensive understanding of the structure-composition-performance relationship of mixed polyanion cathode materials together with the discussion of their sodium storage *** is anticipated that further innovative works on the material design of advanced cathode materials for batteries can be inspired.

关键词： Mixed polyanion compounds Cathode materials Polyanions Energy storage Sodium-ion batteries

A green route to synthesize low-cost and high-performance hard carbon as promising sodium-ion battery anodes from sorghum stalk waste

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Green Energy & Environment 2017年第3期2卷 310-315页

作者： Xiaoming Zhu Xiaoyu Jiang Xiaoling Liu Lifen Xiao yuliang cao Hubei Collaboration Innovation Center of Non-power Nuclear Technology School of Nuclear Technology & Chemistry and Biology Hubei University of Science and Technology Hubei Key Lab.of Electrochemical Power Sources College of Chemistry and Molecular Sciences Wuhan University College of Chemistry Central China Normal University

Sodium-ion batteries(SIBs) have been considered to be potential candidates for next-generation low-cost energy storage systems due to the low-cost and abundance of Na resources. However, it is a big challenge to find suitable anode materials with low-cost and good performance for the application of SIBs. Hard carbon could be a promising anode material due to high capacity and expectable low-cost if originating from biomass. Herein, we report a hard carbon material derived from abundant and abandoned biomass of sorghum stalk through a simple carbonization method. The effects of carbonization temperature on microstructure and electrochemical performance are investigated. The hard carbon carbonized at 1300 ℃ delivers the best rate capability(172 mAh g^(-1) at 200 mA g^(-1)) and good cycling performance(245 mAh g^(-1) after 50 cycles at 20 mA g^(-1),96% capacity retention). This contribution provides a green route for transforming sorghum stalk waste into "treasure"of promising low-cost anode material for SIBs.

关键词： Sorghum stalk Hard carbon Anode Sodium-ion battery Carbonization