SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 57 ›› Issue (5): 214-223.DOI: 10.1016/j.cjche.2022.09.010

• Full Length Article • 上一篇    下一篇

KOH-assisted aqueous synthesis of ZIF-67 with high-yield and its derived cobalt selenide/carbon composites for high-performance Li-ion batteries

Kai Xue1, Yanchun Xue1, Jing Wang1, Shuya Zhang1, Xingmei Guo1,2, Xiangjun Zheng1, Fu Cao1, Qinghong Kong3, Junhao Zhang1, Zhong Jin2   

  1. 1. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    2. MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, Suzhou Tierui New Energy Technology Co. Ltd, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China;
    3. School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
  • 收稿日期:2022-05-23 修回日期:2022-08-27 出版日期:2023-05-28 发布日期:2023-07-08
  • 通讯作者: Xingmei Guo,E-mail:guoxm@just.edu.cn;Fu Cao,E-mail:huanjing2001@163.com;Junhao Zhang,E-mail:jhzhang6@just.edu.cn;Zhong Jin,E-mail:zhongjin@nju.edu.cn
  • 基金资助:
    The work was financially supported by the National Key Research and Development Program of China (2017YFA0208200), the National Natural Science Foundation of China (52102100, 22022505 and 21872069), the Natural Science Foundation of Jiangsu Province (BK20181469), Guangdong Basic and Applied Basic Research Foundation (2020A1515110035), the Fundamental Research Funds for the Central Universities (0205-14380266, 0205-14380272), the Scientific and Technological Innovation Special Fund for Carbon Peak and Carbon Neutrality of Jiangsu Province (BK20220008), and the 2021 Suzhou Gusu Leading Talents of Science and Technology Innovation and Entrepreneurship in Wujiang District.

KOH-assisted aqueous synthesis of ZIF-67 with high-yield and its derived cobalt selenide/carbon composites for high-performance Li-ion batteries

Kai Xue1, Yanchun Xue1, Jing Wang1, Shuya Zhang1, Xingmei Guo1,2, Xiangjun Zheng1, Fu Cao1, Qinghong Kong3, Junhao Zhang1, Zhong Jin2   

  1. 1. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    2. MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, Suzhou Tierui New Energy Technology Co. Ltd, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China;
    3. School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
  • Received:2022-05-23 Revised:2022-08-27 Online:2023-05-28 Published:2023-07-08
  • Contact: Xingmei Guo,E-mail:guoxm@just.edu.cn;Fu Cao,E-mail:huanjing2001@163.com;Junhao Zhang,E-mail:jhzhang6@just.edu.cn;Zhong Jin,E-mail:zhongjin@nju.edu.cn
  • Supported by:
    The work was financially supported by the National Key Research and Development Program of China (2017YFA0208200), the National Natural Science Foundation of China (52102100, 22022505 and 21872069), the Natural Science Foundation of Jiangsu Province (BK20181469), Guangdong Basic and Applied Basic Research Foundation (2020A1515110035), the Fundamental Research Funds for the Central Universities (0205-14380266, 0205-14380272), the Scientific and Technological Innovation Special Fund for Carbon Peak and Carbon Neutrality of Jiangsu Province (BK20220008), and the 2021 Suzhou Gusu Leading Talents of Science and Technology Innovation and Entrepreneurship in Wujiang District.

摘要: To solve the environmental pollution and low yield during the sythesis of zeolitic imidazolate frameworks (ZIFs) and their derived materials, a KOH-assisted aqueous strategy is proposed to synthesize cobalt zeolitic imidazolate framework (ZIF-67) polyhedrons, which are used as precursors to prepare cobalt selenide/carbon composites with different crystal phases (Co0.85Se, CoSe2). When evaluated as anode material for lithium ion batteries, Co0.85Se/C composites deliver a reversible capacity of 758.7 mA·h·g-1 with a capacity retention rate of 90.5% at 1.0 A·g-1 after 500 cycles, and the superior rate capability is 620 mA·h·g-1 at 2.0 A·g-1. The addition of KOH accelerates the production of ZIF-67 crystals by boosting deprotonation of dimethylimidazole, resulting in rapid growth and structures transition from two-dimensional to three-dimensional of ZIF-67 in aqueous solution, which greatly promotes the application of MOFs in the field of energy storage and conversion.

关键词: KOH-assisted strategy, Synthesis, Aqueous solution, Nanostructure, Lithium-ion batteries, Long cycle performance

Abstract: To solve the environmental pollution and low yield during the sythesis of zeolitic imidazolate frameworks (ZIFs) and their derived materials, a KOH-assisted aqueous strategy is proposed to synthesize cobalt zeolitic imidazolate framework (ZIF-67) polyhedrons, which are used as precursors to prepare cobalt selenide/carbon composites with different crystal phases (Co0.85Se, CoSe2). When evaluated as anode material for lithium ion batteries, Co0.85Se/C composites deliver a reversible capacity of 758.7 mA·h·g-1 with a capacity retention rate of 90.5% at 1.0 A·g-1 after 500 cycles, and the superior rate capability is 620 mA·h·g-1 at 2.0 A·g-1. The addition of KOH accelerates the production of ZIF-67 crystals by boosting deprotonation of dimethylimidazole, resulting in rapid growth and structures transition from two-dimensional to three-dimensional of ZIF-67 in aqueous solution, which greatly promotes the application of MOFs in the field of energy storage and conversion.

Key words: KOH-assisted strategy, Synthesis, Aqueous solution, Nanostructure, Lithium-ion batteries, Long cycle performance