 The abstract line 0.8co0.1mn0.102 cathode suffers from severe bulk structural and interfacial degradation during battery operation. A 3-in-1 strategy involving ZrB2 as a dopant was developed to address these issues. This strategy involves doping Zr and B into the bulk of line 0.8co0.1mn0.102, which helps stabilize the crystal structure and reduce microcracking. Additionally, during high temperature calcination, some of the remaining Zr at the surface combines with the surface lithium source to form lithium zirconium coatings, which physically protects the surface and reduces interfacial phase transitions upon cycling. As a result, the 0.2 mole percent ZrB2 line 0.8co0.1mn0.102 cathode delivers a discharge capacity of 183.1 mAh g-1 after 100 cycles at 50 degrees Celsius, 1C, 3.0 to 4.3V, with an outstanding capacity retention of 88. This article was authored by Zey Fong, Ranjasha Rajagopalan, Shan Zhang, and others. We are article.tv. Links in the description below.