Alloy-type materials with the characteristics of high theoretical capacity,low sodiation/desodiation potential,and good conductivity are considered as one of the most promising anodes for sodium-ion batteries or capacitors.However,the large volume change during the sodiation leads to poor cyclability and slow kinetics,thus presenting the main issue impeding the practical applica-tion.Herein,we propose a facile wet chemistry and pyrolysis method to synthesize Sb-carbon composite that Sb nanoparticles or single atoms are confined and/or dis-persed in the wrinkled carbon framework with high nitro-gen content.This unique architecture of Sb-carbon composite increases atomic interface contact/interaction with Na+,facilitating ion diffusion and alleviating the volume change of Sb during the charge/discharge process.Half-cell test shows that Sb-carbon composite exhibits a high-rate capability and stable cycling life.Furthermore,sodium-ion capacitors fabricated by employing Sb-carbon composite as anode and home-made active carbon as cathode,deliver both high-energy density of 157 Wh·kg-1 and high-power density of 25 kW·kg-1 as well as excellent cycling performance exceeding 4000 cycles.

Wei-Qing Yu;Chun-Yan Zhu;Ru-Tao Wang;Jian-Chao Chen;Qing-Yuan Liu;Shu-Xian Zhang;Zhi-Jie Gao;Cheng-Xiang Wang;Zhi-Wei Zhang;Long-Wei Yin

Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials,Ministry of Education,School of Materials Science and Engineering,Shandong University,Jinan 250061,China;Suzhou Institute of Shandong University,Suzhou 215123,China;College of Chemical Engineering and Safety,Binzhou University,Binzhou 256603,China

稀有金属（英文版）

[1]Wei-Qing Yu;Chun-Yan Zhu;Ru-Tao Wang;Jian-Chao Chen;Qing-Yuan Liu;Shu-Xian Zhang;Zhi-Jie Gao;Cheng-Xiang Wang;Zhi-Wei Zhang;Long-Wei Yin-.Advanced sodium-ion capacitor based on antimony-carbon composite anode)[J].稀有金属（英文版）,2022(10):3360-3369

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