Core-shell N-doped carbon embedded Co3O4 nanoparticles with interconnected and hierarchical porous structure as superior anode materials for lithium-ion batteries. (July 2023)

• Record Type: Journal Article
• Authors: Xiao, Yupeng; Li, Tianle; Mao, Yangyang; Hao, Xiaoqian; Wang, Wenju; Meng, Shaoliang; Wu, Jun; Zhao, Jiucheng
• Is Part Of: Journal of energy storage. Volume 63(2023)
• Publication Date: 2023-07
• Subjects: Lithium-ion battery -- Metal-organic framework -- Cobalt oxide -- Interconnect structure -- Hierarchical pore; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2023.106998
• Languages: English
• ISSNs: 2352-152X

Abstract

Abstract: Confining Transition metal oxides (TMOs) nanoparticles in porous carbon is an effective strategy to improve its electrochemical performance. Herein, the large grain size Co-based metal-organic framework (Co-MOF) was used as precursor to synthesize core-shell structure of Co3 O4 encapsulated in nitrogen-doped carbon (denoted as L-Co3 O4 @NC). The in-situ synthesized L-Co3 O4 @NC exhibits a unique interconnected and hierarchical porous structure. Owing to the unique structu Line14ral merits including fast charge transmission and Li + diffusion, effectively accommodate the volume change, and promote the access of Li +, the L-Co3 O4 @NC exhibits excellent lithium storage performance in terms of high specific capacity (1389 mAh g −1 at 0.1A g −1 after 50 cycles), enhanced rate capability (1373, 1182 and 945 mAh g −1 at 0.5, 1 and 2 A g −1, respectively), and cycling stability at large current density (1183 mAh g −1 at 1 A g −1 and 960 mAh g −1 at 2 A g −1 after 200 cycles), which outperforms most of recently reported Co3 O4 based electrodes. This work provides a new avenue for developing Co-based anode materials with high performance in energy storage field. Highlights: The L-Co3 O4 @NC with a unique interconnected and hierarchical porous structure is successful prepared. The interconnected carbon enhance charge transmission and Li + diffusion, the hierarchical pores alleviated volume change. L-Co3 O4 @NC exhibits high specific capacity, excellent rate capability and cycling stability.