High-Performance Cr8O21 Cathode Materials with MnO2 as an Activator for High-Energy-Density Lithium Primary Batteries

• DOI: 10.1021/acsami.5c01226
• Publication Date: 2025-04-23T16:45:46Z
• Authors: Qingfei Meng; Rui Yang; Yuyang Qi; Peng Wang; Shuwei Zhang; Chenglong Jin; Yuliang Cao
• Keywords: Energy density; Primary (astronomy)

Chromium oxides (Cr8O21) have attracted wide application due to their high theoretical capacity and voltage for lithium primary batteries. However, Cr8O21 is usually prepared by pyrolysis of a CrO3 precursor suffers from low poor rate capability the fusion during high-temperature reaction process. Herein, MnO2 was investigated as an activator study its impact on electrochemical properties Cr8O21, which significantly changed with addition calcination With MnO2, discharge products (Cr8O21-M) were dramatically improved compared those pure Cr8O21. This improvement attributed superior lithium-ion diffusion kinetics caused uniform surface structure porous features, reduce charge transfer resistance. As result, Cr8O21-M10 exhibited excellent specific 388 mAh g-1 at 0.1C plateaus about 3.0 V (vs Li+/Li), reaching energy density 1223 Wh kg-1 based cathode material. In addition, Cr8O21-M showed remarkable performance, enabling high-capacity retention 70% 5C. Therefore, it essential add agent preparation offers promising avenue development high-energy-density high-rate-capability Li/Cr8O21