Acta Chimica Sinica ›› 2023, Vol. 81 ›› Issue (5): 486-495.DOI: 10.6023/A23020046 Previous Articles     Next Articles



贾洋刚a, 陈诗洁a, 邵霞a, 程婕a, 林娜a, 方道来a, 冒爱琴a,b,*(), 李灿华c,*()   

  1. a 安徽工业大学 材料科学与工程学院 马鞍山 243032
    b 安徽工业大学 先进金属材料绿色制备与表面技术教育部重点实验室 马鞍山 243032
    c 安徽工业大学 冶金工程学院 马鞍山 243032
  • 投稿日期:2023-02-23 发布日期:2023-04-17
  • 基金资助:
    安徽省自然科学基金(2008085ME125); 先进金属材料绿色制备与表面技术教育部重点实验室主任基金(GFST2022ZR08); 安徽省高校自然科学研究重点项目(KJ2020A0268)

Preparation and High-performance Lithium-ion Storage of Cobalt-free Perovskite High-entropy Oxide Anode Materials

Jia Yangganga, Chen Shijiea, Shao Xiaa, Cheng Jiea, Lin Naa, Fang Daolaia, Mao Aiqina,b(), Li Canhuac()   

  1. a School of Materials Science and Engineering, Anhui University of Technology, Ma’anshan 243032
    b Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education, Anhui University of Technology, Ma’anshan 243032
    c School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243032
  • Received:2023-02-23 Published:2023-04-17
  • Contact: *E-mail:, Tel.: 13855599146;, Tel.: 18162347179
  • Supported by:
    Natural Science Foundation of Anhui Province(2008085ME125); Director's Fund of Key Laboratory of Green Fabrication and Surface Technology of Advance Matal Materials, Ministry of Education(GFST2022ZR08); University Natural Science Research Project of Anhui Province in China(KJ2020A0268)

High-entropy oxides (HEOs) have become increasingly popular as energy storage materials owing to their unique high-entropy effect, multi-principal synergy effect and customizable structure. In this study, a series of cobalt-free perovskite high-entropy oxide La(Cr0.2Fe0.2Mn0.2Ni0.2M0.2)O3 (M=Cu, Mg, Zn) lithium-ion battery anode materials were successfully synthesized by solution combustion method using metal nitrate as the metal source and glycine as the fuel. The microstructure and electrochemical properties of the as-prepared powders were investigated. The results show that the as-prepared high- entropy oxides crystalize into single-phase perovskite structure with porous foam-like shape and chemical/microstructural homogeneity. Furthermore, the as-prepared HEOs introducing inactive element Mg or active element Cu possess similar electrochemical performance; while the La(Cr0.2Fe0.2Mn0.2Ni0.2Zn0.2)O3 electrode exhibits a highest reversible capacity (1014 mAh•g−1 at 200 mA•g−1 after 250 cycles), excellent cycling stability (450 mAh•g−1 at 1000 mA•g−1 and almost no capacity decay after 1000 cycles) and outstanding rate performance. Such excellent performance can be attributed to the addition of active element Zn, which can form Li-Zn alloy during the reduction process that makes the specific capacity increase significantly. Meanwhile, its higher specific surface area, mesoporous structure and abundant surface oxygen vacancies result in higher conductivity (0.14 S•cm−1), increased larger lithium ion diffusion coefficient (2.1×10−12 cm2•s−1), and pseudo-capacitance contribution, thus significantly enhances the specific capacity and rate performance of the as-prepared material. Therefore, the introduction of electrochemically active metals, which can react with Li alloying, such as Zn, can improve the electrochemical performance, thereby providing ideas for designing cobalt-free HEOs with low-cost and excellent performance for energy storage.

Key words: lithium-ion battery anode material, high-entropy oxide, perovskite structure, alloying, pseudo-capacitance