Investigation on improving electrochemical performance of alkaline Zn-Mn batteries via potassium persulfate as cathode additive
WU Zijie
WANG Gangyao
MO Zhaoxi
LIAO Youhao
LI Weishan
Abstract：To improve the electrochemical performance of alkaline zinc-manganese batteries,this paper introduced potassium persulfate as a cathode additive for the first time.Experimental results demonstrated that the open-circuit voltage of LR6 batteries significantly increased from 1.651 V(without additive)to 1.675 V when the potassium persulfate was added at a concentration of 0.5%by mass of the manganese dioxide cathode.Additionally,the discharge time at a continuous resistance of 3.9 Ω until the voltage dropped to 0.9 V extended from 404.7 min(without additive)to 414.0 min.Meanwhile,the discharge performance under various loads and discharge modes,including 250 mA/1 000 mA,3.9 Ω/43 Ω and 1.5 W/0.65 W conditions,also showed significant improvement.After storage at room temperature(25℃)and high temperature(60℃),LR6 batteries maintained relatively high levels of open-circuit voltage and discharge performance,demonstrating excellent storage characteristics.These research findings provided new insights into enhancing the performance of alkaline zinc-manganese batteries,thereby contributing to the rapid development of battery technology and improving their economic benefits.
Keywords：alkaline zinc-manganese batteriespotassium persulfatecathode additiveopen-circuit voltagestorage performance
Publication Date：2025-08-25
Online Publishing Date：2025-09-22(First online date of this platform, not the publication date of the document)
Pages：6( 241-246 )