MOF-Derived Long Spindle-like Carbon-Coated Ternary Transition-Metal-Oxide Composite for Lithium Storage

Liming Wu; Yan-Gai Liu; Hang Zhao; Zekun Wang; Bing Zhu; Xi Zhang; Peijie He; Yicen Liu; Tao Yang

doi:10.1021/acsomega.2c01988

MOF-Derived Long Spindle-like Carbon-Coated Ternary Transition-Metal-Oxide Composite for Lithium Storage

ACS Omega. 2022 May 5;7(19):16837-16846. doi: 10.1021/acsomega.2c01988. eCollection 2022 May 17.

Authors

Liming Wu¹, Yan-Gai Liu¹, Hang Zhao¹, Zekun Wang¹, Bing Zhu¹, Xi Zhang¹, Peijie He¹, Yicen Liu¹, Tao Yang²

Affiliations

¹ School of Materials Science and Technology, Beijing Key Laboratory of Materials, Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, China University of Geosciences, Beijing 100083, People's Republic of China.
² College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China.

Abstract

Fe₃O₄ is a promising alternative for next-generation lithium-ion batteries (LIBs). However, its poor cycle stability due to the large volume effect during cycling and poor conductivity hinders its application. Herein, we have successfully designed and prepared a carbon-coated ternary transition-metal-oxide composite (noted as (FeCoNi)₃O₄@C), which is derived from FeCoNi-MOF-74 (denoted as FeCoNi-211-24). (FeCoNi)₃O₄@C perfectly inherited the long spindle-shaped precursor structure, and (FeCoNi)₃O₄ particles grew in situ on the precursor surface. The ordered particles and the carbon-coated structure inhibited the agglomeration of particles, improving the material's cycle stability and conductivity. Therefore, the electrode exhibited excellent electrochemical performance. Specifically, (FeCoNi)₃O₄@C-700 presented excellent initial discharge capacity (763.1 mAh g^-1 at 0.2 A g^-1), high initial coulombic efficiency (73.8%), excellent rate capability, and cycle stability (634.6 mAh g^-1 at 0.5 A g^-1 after 505 cycles). This study provides a novel idea for developing anode materials for LIBs.