Preparation and Performance of Regenerated Al2O3-Coated Cathode Material LiNi0.8Co0.15Al0.05O2 from Spent Power Lithium-Ion Batteries

Liwen Ma; Guangyun Liu; Yuehua Wang; Xiaoli Xi

doi:10.3390/molecules28135165

Preparation and Performance of Regenerated Al₂O₃-Coated Cathode Material LiNi_0.8Co_0.15Al_0.05O₂ from Spent Power Lithium-Ion Batteries

Molecules. 2023 Jul 2;28(13):5165. doi: 10.3390/molecules28135165.

Authors

Liwen Ma^{1

2}, Guangyun Liu¹, Yuehua Wang³, Xiaoli Xi^{1

3}

Affiliations

¹ Collaborative Innovation Center of Capital Resource-Recycling Material Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China.
² National Engineering Laboratory for Industrial Big-Data Application Technology, Beijing University of Technology, Beijing 100124, China.
³ Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China.

Abstract

In this study, LiNi_0.8Co_0.15Al_0.05O₂@x%Al₂O_3-coated cathode materials were regeneratively compounded by the solid-phase sintering method, and their structural characterization and electrochemical performance were systematically analyzed. The regenerated ternary cathode material precursor synthesized by the co-precipitation method was roasted with lithium carbonate at a molar ratio of 1:1.1, and then completely mixed with different contents of aluminum hydroxide. The combined materials were then sintered at 800 °C for 15 h to obtain the regenerated coated cathode material, LiNi_0.8Co_0.15Al_0.05O₂@x%Al₂O₃. The thermogravimetry analysis, phase composition, morphological characteristics, and other tests show that when the added content of aluminum hydroxide is 3%, the regenerated cathode material, LiNi_0.8Co_0.15Al_0.05O₂@1.5%Al₂O_3, exhibits the highest-order layered structure with Al₂O₃ coating. This material can better inhibit the production of Ni²⁺, and improve material structure and electrochemical properties. The first charge-discharge efficiency of the battery assembled with this regenerated cathode material is 97.4%, a 50-cycle capacity retention is 93.4%, and a 100-cycle capacity retention is 87.6%. The first charge-discharge efficiency is far better than that of the uncoated regenerated battery.

Keywords: coated cathode materials; regeneration; solid phase sintering; spent power lithium-ion battery.

MeSH terms

Aluminum Hydroxide
Body Fluids*
Electrodes
Ions
Lithium Carbonate
Lithium*

Substances

Lithium
Aluminum Hydroxide
Lithium Carbonate
Ions

Grants and funding

This work was supported by National Natural Science Foundation of China for Distinguished Young Scholar (No. 52025042), key technology research and development project of the Ministry of Industry and Information Technology of China, Strategic Research and Consulting Project of Chinese Academy of Engineering (No. 2022-XEZD-07).