Study on the performance of LiCo_xMn_(2 ? x)O_(4 ? y)F_y using spent alkaline Zn–Mn batteries as manganese source

摘要

We have successfully synthesized the spinel LiCo_xMn_(2 ? x)O_(4 ? y)F_y cathode materials by simple sol-gel method using the manganese source that is recovered from spent alkaline Zn–Mn batteries through hydrometallurgy recycling technology. The charge–discharge curves demonstrate that the LiCo_(0.1)Mn_(1.9)O_4 exhibited good cycling performancewith 94.0% capacity retention after 100 cycles. The LiMn_2O_(3.9) F_(0.1) possesses themaximuminitial discharge capacity of 124.54 mAh · g~(?1). The LiCo_(0.1)Mn_(1.9)O_(3.9) F_(0.1) has the best comprehensive performance. The initial discharge capacity of LiCo_(0.1)Mn_(1.9)O_(3.9) F_(0.1) is 120.7mAh · g~(?1), the capacity retention is 91.7% after 100 cycles.