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作 者:Ru Wang Yiming Fan Jiaqi Wang Yuyang Li Xiangyang Li Feng Jin Xiaofei Hu
机构地区:[1]School of Chemistry,Engineering Research Center of Energy Storage Materials and Devices,Ministry of Education,State Key Laboratory for Mechanical Behavior of Materials.Xi'an Jiaotong University,Xi'an,710049,Shaanxi,PR China [2]Department of Chemistry and Biochemistry.Northern Illinois University,DeKalb,IL,60115,USA [3]State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi'an Jiaotong University,Xi'an,710049,Shaanxi,PR China [4]State Key Laboratory of Electrical Insulation and Power Equipment,School of Electrical Engineering,Xi'an Jiaotong University,Xi'an,Shaanxi,710049,PR China [5]Xi'an Institute of Electromechanical Information Technology,Xi'an,710065,PR China
出 处:《Progress in Natural Science:Materials International》2024年第6期1281-1294,共14页自然科学进展·国际材料(英文版)
基 金:supported by the National Natural Science Foundation of China(No.52201278);the Young Talent Support Plan of Xi'an Jiaotong University(for X.F.H.);the Department of Science and Technology of Shaanxi Province(QCYRCXM-2022-126)
摘 要:The advancement of sodium-ion batteries is hindered by the imperative to reconcile extreme environmental conditions and high-rate demands,posing challenges in the synthesis of cost-effective and high-performance anode materials.Among the potential candidates,lignite-based soft carbon materials stand out due to their abundant resources and low cost.An ultrafast approach using high-temperature thermal shock pulses is reported for the synthesis of soft carbon anode from lignite,and the mechanism of“adsorption-intercalation-pore filling”is proposed.Based on structure analysis,in/ex-situ electrochemically characterization,and calculation/simulation,high concentration of defects and C=O contents,along with abundant closed pore structures,contribute to enhancing the sodium storage capabilities of the material.The optimized sample demonstrates a substantial reversible capacity of 300.6 m Ah g^(-1)at 0.1C and outstanding high-rate capability at 10.0C,which also maintains proper functionality in a wide temperature range(-40~80°C).This performance surpasses that of previously reported lignite-based soft carbon materials.Additionally,the assembled full-cell maintains a high-energy density of 235.8 Wh kg^(-1).This work provides valuable insights into developing anode materials for coal-based SIBs at high-rate current densities in a wide range of temperatures.
关 键 词:Sodium-ion batteries High-rate LIGNITE High-temperature thermal shock pulse A wide temperature range
分 类 号:TQ127.11[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]
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