Improved extraction of cobalt and lithium by reductive acid from spent lithium-ion batteries via mechanical activation process

Guo Yaoguang, Li Yaguang, Lou Xiaoyi, Guan Jie, Li Yingshun, Mai Xianmin, Liu Hu, Zhao Cindy Xinxin, Wang Ning, Yan Chao, Gao Guilan, Yuan Hao, Dai Jue, Su Ruijng, Guo Zhanhu